Answer:
Crossing over is a process in which exchange of segments occur.
Explanation:
Crossing over is a process in which two non-sister chromatids of homologous chromosomes exchange the segments of genetic material with each other during meiosis. Due to this process, variation occurs in an organism.
Independent assortment is a process in which different alleles are sorted to different gametes which occurs independently and does not effect one another. This process occurs in metaphase of meiosis l.
Joining of sex cells is a process in which sex cells of male and female join together formed a zygote which turn into a new organism. These sex cells are formed during meiosis which are haploid in nature.
Mutation and crossing over are the factors that cause inherited genetic variations within populations.
Sudden change occurs in the genes of an organism due to the exposure of the cell to radiation or chemicals.
Select the correct answer.
Which statement best compares the role of meiosis in a unicellular and a multicellular organisms?
OA.
Meiosis is the mechanism used for producing somatic cells in unicellular as well as multicellular
OB.
Meiosis is the mechanism used for producing gametes in unicellular organisms and somatic cells
O c.
Meiosis is the mechanism used for producing gametes in multicellular organisms whereas it doe
unicellular organisms.
Reset
Next
Answer:
Meiosis is the mechanism used for producing gametes in multicellular organisms whereas it does
unicellular organisms.
Explanation:
Meiosis is a kind of cell division used mainly by sexually-reproducing organisms, whether unicellular or multicellular, to produce gametes i.e. meiosis only occurs during gamete formation.
In sexual reproduction, gametes must fuse in a process called fertilization. This gametes, however, must each possess half of the chromosome number of the individual organism. Meiosis is the process that ensures that the chromosome number of the gametes is reduced by half i.e. diploid (2n) to haploid (n).
Therefore, meiosis is the process of gamete formation in sexually-reproducing unicellular or multicellular organisms.
During an immune response, some cells of the immune system expose antibodies and,
thereby, cause pathogens to be immobilized and form clumps. Which cells of the immune
system have this
function?
A) killer T-Cells
B) helper T-Cells
C) suppressor T-Cells
D) macrophages
i think the answer is B) helper T-Cells
g 1 molecule of glucose is catabolized to pyruvate and then acetyl-coA. All the acetyl-coA enters the citric acid cycle. How many molecules of NADH are produced from the citric acid cycle only (do not include NADH from glycolysis or the pyruvate dehydrogenase complex in your calculation.) You must answer as a number i.e if you think the answer is 12, you must enter 12, not twelve.
Answer:
6NADH
Explanation:
In the kreb's cycle NAD is reduced during the reduction of 6-carbon citrate to 5 carbon Alpha-Ketoglularate.
The second is produced during the conversion of 5carbon alpha ketoglutarate to succinate. Lastly in the conversion of fumirate to oxoloacetate;another NADH is formed.
However, since two pyruvate enters the Kreb's cycle therefore 6NADH(three NADH per cycle of Citric) are produced for each molecule of glucose that is broken down from glycolysis.
Remember,each glucose molecule goes through 2 cycles of Kreb.
Futhermore co-enzyme FADH2 are also produced,with 2 molecules per 1 glucose.
These Co-ezymes transfer hydrogen ions,into the matrix of the mitochondria,where is is splits to protons and electrons.
The electrons formed the ETC,which produce PMF for transporting protons into the intramembranes for electrochemical gradients needed to generate energy for ATP s synthesis,by ATP synthase.
.
Polaris is ______. (choose the three correct answers). called the north star. no choices fit this sentence always directly over the north pole. a star that is often the brightest start in Ursa Minor.
Answer:
called the north star, always directly over the north pole and a star that is often the brightest start in Ursa minor..
Explanation:
Polaris commonly the North Star or Pole Star and is the brightest star in the constellation of Ursa Minor. It is very close to the north celestial pole, making it the current northern pole star.
hope this answer correct (^^) ....
Which type of cell can duplicate indefinitely?
Answer:
Embryonic stem cells
Explanation:
Answer:b
Explanation:
PLEASE HELP ME ASAP BECAUSE IT IS DIFFICULT TO UNDERSTAND. Explain it for me.
Answer:
C.
Explanation:
For mRNA strands, there are four letters used in their code. A (adenine), U (Uracil), G (guanine), and C (cytosine.)
For RNA, it is the same, but the Uracil is replaced with Thymine (T).
A always pairs with U.
G always pairs with C.
YOUR QUESTION:
The scientist's strand code is has to convert the Thymine to Uracil since it is RNA instead of mRNA.
Hopefully this somewhat helped :)
Phytoplankton, shown on the left in the image below, are microscopic organisms that can be found in freshwater and salt water environments. They perform photosynthesis to get energy and act as an important food source for larger organisms, such as the whale that is shown on the right. Phytoplankton A large whale. Which characteristic describes the whale but not its food source, the phytoplankton? The whale is heterotrophic. The whale has cell walls. The whale is unicellular. The whale is a prokaryote.
Answer:
The whale is heterotrophic.
Explanation:
Energy is needed by organisms to perform their life functions. Organisms, in nature, feed on one another for energy source. Some organisms are, however, capable of synthesizing their own food or energy source via a process called photosynthesis. This is the case of the phytoplankton in the question. These organisms are, therefore, called AUTOTROPHIC ORGANISMS or PRODUCERS.
On the other hand, some organisms are incapable of this self-production of energy source. Hence, they rely on other organisms for it. These category of organisms are called HETEROTROPHIC organisms, which is the category the large whale fall into due to its dependence on phytoplankton for energy source.
Name the components that gets digested in stomach and pancreas.
Explanation:
example protein can be digested both in stomach and pancreas
What type of transport occurs in the cell membrane when a person does sports and is consuming alcohol?
Cellular transport: it is the exchange of substances through the plasma membrane, which is a semipermeable membrane. Transport routes are through the cell membrane
It allows the metabolism waste to be expelled from its interior It allows the movement of substances that it synthesizes as hormones. Metabolic energy: is the way in which it acquires nutrients through processes of incorporation into the cell of nutrients dissolved in water.
Therefore, when the person consumes alcohol in excess the ce transport is part of the disincorporation of toxic waste, while when the person does sports, and is supposed to have a balanced diet, the cellular transport uses it for his metabolic energy.
What type of molecule is represented by the model below? A molecule made up of four carbon rings with other atoms bonded to those rings. Fat Carbohydrate Steroid Protein Points earned on this question: 0
Answer:
Steroid
Explanation:
Steroids are molecules that usually have 17 carbon atoms distributed in four rings of carbon bonded together and linked to atoms of other elements, as shown in the aciam figure. Steroids are molecules soluble in fat and are produced synthetically for therapeutic and even aesthetic purposes, however their use must be monitored by a responsible professional.
Answer:
STEROID
Explanation:
Steroids are molecules that usually have 17 carbon atoms distributed in four rings of carbon bonded together and linked to atoms of other elements, as shown in the aciam figure. Steroids are molecules soluble in fat and are produced synthetically for therapeutic and even aesthetic purposes, however their use must be monitored by a responsible professional.
Why is oceanic crust subducted under continental crust?
A. Oceanic crust is moving faster than continental crust.
B. Oceanic crust is denser than continental crust.
C. Oceanic crust is less dense than continental crust.
D. Oceanic crust is older than continental crust.
Answer:
B.) Oceanic crust is denser than continental crust.
Explanation:
Oceanic crust is denser, so it is subducted under the continental crust. The less dense magma then rises up through the continental crust, then it's further increasing the size of the continental crust and then maintaining it's lower density than the oceanic crust, which then causes subduction.
I hope this helped. I am sorry if you get this wrong.
Answer:
B.) Oceanic crust is denser than continental crust.
Explanation:
I just did it and got it right :)
Assume a population of deer has a crude birth rate of 36 per 1,000/yr, a crude death rate of 20 per 1,000/yr, an immigration rate of 15 per 1,000/yr, and an emigration rate of 8 per 1,000/yr. What is the population growth rate
Answer:
0.023%
Explanation:
The Population growth rate is a change in population with time taken into consideration. It can be expressed with the formula
[tex]N/t[/tex] where N is the total change in the population size, and t is time.
When immigration and emigration are factored in, we now have the formula;
[tex](CBR +I) - (CDR + I)/1000[/tex]
[tex]= (36 + 15) - (20 + 8) = 51 - 28= 23\\\\expressing as a percentage of the population gives us,\\\\23/1000=0.023%\\\\[/tex]
Both a breathing guinea pig and burning charcoal give off the same amount of heat energy when the same amount of O2 is used up.
Which of the following statements is most closely related to this observation?
A. In ordinary changes energy may be transferred from one form to another, but it is not destroyed.
B. In ordinary changes matter is neither created nor destroyed.
C. As a product of a reaction accumulates, its abundance automatically cuts down the formation of the product.
D. The smaller the mammal, the higher its metabolic rate.
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Question 79 1 pts Both a breathing guinea pig and burning charcoal give off the same amount of heat energy when the same amount of Oz is used up. Which of the following statements is most closely related to this observation? In ordinary changes energy may be transferred from one form to another, but it is not destroyed. In ordinary changes matter is neither created nor destroyed. As a product of a reaction accumulates, its abundance automatically cuts down the formation of the product. The smaller the mammal, the higher its metabolic rate. D Question 80 1 pts During respiration the amount of Oz consumed can be calculated from the amount of CO2 produced.
Explanation:
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The statement which is most closely related to this observation is that In ordinary changes energy may be transferred from one form to another, but it is not destroyed.
What is Law of conservation of energy?This states that energy can neither be created nor destroyed but can be converted from one form to another.
This explains why a breathing guinea pig and burning charcoal give off the same amount of heat energy when the same amount of oxygen is used up.
Read more about Conservation of energy here https://brainly.com/question/166559
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Which of the following is a human-related release of greenhouse gases?
O A. Wild animal respiration
OB. Volcanic eruptions
O C. Intensive agriculture
O D. Solar cycles
It’s A
Answer:
C
Explanation:
I'm pretty sure it's actually C and not A. It's asking for human-related release from greenhouse gases. Humans don't cause volcanic eruptions and aren't in control of wildlife's respirations. The solar cycles has to do with the magnetic flux that rises to the surface of the sun and lasts 11 years. Intensive agriculture increases pollution which harms the environment.
People can breed cats for specific traits such as coat color through the process of _____. a. natural selection b. descent with modification c. selection with modification d. artificial selection
Answer:
D. Artificial Selection.
Explanation:
Normal people can't breed cats by modifying their DNA, so options b and c are eliminated. Breeding cats for specific traits is not natural, so it is not choice a, either. Instead, selective breeding is d. artificial selection.
Hope this helps!
Answer:
D. Artificial Selection.
What is one activity that has impacted biodiversity?
Answer:
Biodiversity is that facing degradation, destruction,and the fragmentation activity.
Explanation:
Human are the change biological can harm biodiversity and the ecosystem function.
Ecosystem is the supporting the animal, plant and community long term survival of ensuring the human populations.
Biodiversity is to response that ecological attributes an urgent species and threat.
Biodiversity responds to typically ensure to the human pressures and use land change pollution.
Biodiversity is the different land uses:-
(1) primary land (2) secondary land
Biodiversity most focus on the ecosystem services.
In pea plants, purple flower color, C, is dominant to white flower color, c. The table shows the frequencies of the dominant and recessive alleles in three generations of peas in a garden. Allele Frequency for Flower Color in Peas Generation p q 1 0.60 0.40 2 0.64 0.36 3 0.75 0.25 4 0.80 0.20 Which generation showed the greatest frequency of having one of each allele? generation 1 generation 2 generation 3 generation 4
Answer:
generation 1
Explanation:
The allele frequency is a term that represents the frequency that an allele can appear in a given population. This term can help to develop conclusions about the genetic diversity that a region presents in relation to the individuals that compose it.
In relation to the question above, generation 1 had the highest frequency of having one of each allele. This is because this generation presents the maximum frequency of the dominant and recessive alleles in a coherent way, 0.60 and 0.40. However, the other generations showed a steady and progressive decrease in the recessive allele.
Answer:
Gen 1 or A
Explanation:
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Which of the following best describes the flow of energy in the Everglades food web shown below? (4 points) Diagram for an everglades food web. The food web contains the following organisms: American alligator, egret, raccoon, carp, Key deer, insects, Southern leopard frog, mangrove, and sawgrass. Mangrove is at the bottom of the food web, with arrows pointing to Key deer and insects. Sawgrass is also at the bottom of the web, with an arrow pointing to insects. Key deer, insects and Southern leopard frog are on the next level up. The Key deer has an arrow pointing to American alligator. The insects point to egret, carp, and Southern leopard frog. The Southern leopard frog points to the American alligator and the raccoon. The egret, carp and raccoon all points upward toward the American alligator. The carp also points to the egret. The American alligator is at the top of the food web. Mangrove → insects → carp → American alligator; about 90 percent of the energy in one trophic level is transferred to the next trophic level. Sawgrass → insects → Southern leopard frog → raccoon → American alligator; about 10 percent of the energy in one trophic level is transferred to the next trophic level. American alligator → carp → insects → mangrove; about 10 percent of the energy in one trophic level is transferred to the next trophic level. Egret → insects → mangrove → key deer → American alligator; about 90 percent of the energy in one trophic level is transferred to the next trophic level.
Answer:
Although there is no diagrammatic representation of the food web but the question can be answered based on the provided information. The answer is:
Sawgrass → insects → Southern leopard frog → raccoon → American alligator; about 10 percent of the energy in one trophic level is transferred to the next trophic level.
Explanation:
Food web is an interconnected food chain i.e. a series of food chains clustered together. A food web represents the various ways one organism can feed on another in a cycle. Since a food web consists of many food chains, energy is transferred when one organism feeds on another (flow of energy).
Just like a food chain, a food web begins with a PRODUCER, which is an organism capable of producing its own food via photosynthesis. This is the case of mangrove and sawgrass in this depicted food web as they are both producers and hence, must start the food web i.e. be at the bottom of the food web. Organisms called CONSUMERS feed on producers and one another to obtain energy. Consumers can be primary, secondary or tertiary depending on the organism they feed on. Primary consumers feed directly on producers, secondary consumer on primary and tertiary consumers on secondary, in that order.
This accounts for why the American Alligator is at the top of the food web because it is a tertiary consumer.
However, as organisms feed on one another, only about 10% of the available energy is transferred because most of the energy (about 90%) has been used for metabolic processes and hence, lost as heat.
Therefore, the best description for the flow of energy in the Everglades food web is:
Sawgrass → insects → Southern leopard frog → raccoon → American alligator; about 10 percent of the energy in one trophic level is transferred to the next trophic level.
Sawgrass is the producer and must begin the energy flow, followed by a primary consumer (insect). Feeding continues in that order until the tertiary consumer (American alligator) is reached.
Answer:
b) Mangrove → insects → Southern leopard frog → raccoon → American alligator; about 10 percent of the energy in one trophic level is transferred to the next trophic level.
Explanation:
took test on FLVS
Why do organisms go through the process of meiosis?
Answer:
Meiosis is essential for sexual reproduction and therefore occurs in all eukaryotes (including single-celled organisms) that reproduce sexually. ... These resultant haploid cells can fuse with other haploid cells of the opposite sex or mating type during fertilization to create a new diploid cell, or zygote.
Explanation:
In 1998, paleoanthropologist Rick Potts published an article in The Yearbook of Physical Anthropology, a peer-reviewed journal. The article was titled “Environmental Hypotheses of Hominin Evolution.” In his paper, Potts claimed that great variations in environmental conditions over time were responsible for the adaptability of humans and the success of our species. Which would most likely be found in his paper? a review of modern human anatomical structure evidence of changing environmental conditions, with references the reasons competing hypotheses are wrong his opinion of what will happen to the survival of the human race
Answer:
Dr. Potts used environmental data to support environmental hypotheses capable of explaining human evolution
Explanation:
In this paper, the author stated that environmental factors have been fundamental for the emergence of adaptive traits during human evolution. In consequence, Dr. Potts explained how particular environmental factors and habitats might have shaped human evolution. For example, it has been hypothesized that dry savanna vegetation might have been a key environmental factor associated to the emergence of human traits including, among others, bipedality, making of tools from stones, the development of human brains, etc. In order to prove this hypothesis, the author recorded environmental data from different regions in Africa (Olorgesailie, Olduvai, Turkana, Zhoukoudian, etc), where it is believed that first hominids evolved about 6-8 million years ago.
ITS NOT B AND ITS NOT C
SOOO EITHER D OR A
Explanation
) Recall what you know about crossing over, independent assortment, and random joining of sex cells during sexual reproduction.
Answer:
Crossing over is the process of interchange of genetic information among non-sister chromatids of homologous chromosome pairs during meiosis (specifically during synapsis in prophase I). During this process, the synaptonemal complex enables the interchange of chromosome fragments between non-sister chromatids through crossing over. Moreover, in sexual reproduction, the zygote diploid cell can be generated by the random joining of fully differentiated haploid gametic cells (male and female gametes). The combination of random joining with the phenomenon of crossing over is known to considerably increase the genetic variation of the resulting offspring. After zygote formation, the successive cycles of cell divisions during embryonic development will develop an organism that during its adult stage will reproduce via sexual reproduction.
Help can you pls number 2 to 4
Answer:
Hey there!
1. Load
2. Broom
3. Flagpole
Hope this helps :)
The most diverse and prevalent organisms on earth are
Answer:bacteria
Explanation:
what kingdom does fish belongs to?
Answer:
animalia
Explanation:
The cladistic approach to primate classification is Group of answer choices based on levels of anatomical complexity, without consideration of ancestor-descendent relationships. based on direct observation of phenotypes only. based on the use of anatomical and genetic evidence to establish ancestral relationships. also called the gradistic method of classification.
Answer :
based on the use of anatomical and genetic evidence to establish ancestral relationships
Explanation :
We know that,
The cladistic approach to primate :
The cladistic approach to primate is defined as phenotypically and anatomical characteristics, genetic and common characteristics that established ancestral relationships.
It is not purely based on phenotypes only, it required genetic and anatomic behaviour and evidences.
Hence, The correct answer is option (III)
How does a catalyst influence a chemical reaction?
Answer: A catalyst speeds up a chemical reaction, without being consumed by the reaction. It increases the reaction rate by lowering the activation energy for a reaction. ... Remember that with a catalyst, the average kinetic energy of the molecules remains the same but the required energy decreases
Explanation:
Mutations in region B and region D give the same results - when either of these regions is mutated, the operon is expressed under all conditions (called constitutive expression). You hypothesize that region B is the operator region and that Region D is the repressor protein. To test your hypothesis, you create two partial diploid lines by introducing a F' plasmid with a wild-type lac operon: Strain 1: F' A B C D E / A B- C D E Strain 2: F' A B C D E / A B C D- E What experimental results would be predicted by your hypothesis
Answer:
As it is given in the question that region D is the repressor protein and operator region is region B then the The repressor region D form a protein that will bind to the operator region B and leads to inhibition of the transcription. So, the repressor protein will not repressed a mutant operator and the lac gene will express itself constitutively.
Strain 1: F' A B C D E / A B- C D E
In this strain the mutant opertor gene is present so, it will not repressed by F' as it will not be able to bind. Hence, the lac gene expression is constitutive.
Strain 2: F' A B C D E / A B C D- E
In this strain there is two protein produced by the F' plasmid mutated repressor protein, and a non-mutated repressor protein. As we know mutated repressor will not bind to operator gene and still expression will take place but here a extra not mutated non-mutated protein is present and the repressor protein from F' will bind to the operator region B and thus repress the expression of gene in it.
What can a person do to limit exposure to X-rays?
wear sunblock
avoid cigarette smoke
wear a protective vest avoid chemicals
X-rays are a form of indirectly ionizing radiation, and it can be really nocive to the humans health, so limiting the exposure is always a priority.
Here the correct option is wearing a protective vest.
-------------------------------------
X-rays are a form of radiation that is indirectly ionizing. Remember that ionization is what causes damage to our cells, so is better to avoid exposures to these types of radiation.
Now, X-rays are strong enough that they can penetrate a lot of common materials (like wood, plastic, etc.) And once it enters in your body, the chain of reactions that starts can't be stoped by external means.
So what you need to do is limit the exposure as much as you can. Ideally, you shouldn't be near a source of X-rays, but if there is no other option, you should use protection against radiation.
It comes in different forms depending on what the application is, for example, there are led screens that you can use to put between you and the source, and these will reduce drastically the fluence (flux of photons) that gets to you.
Similarly, there are protective vests also made in part of led or other high atomic number materials, that absorb the photons and protect you.
So here the correct option is to wear a protective vest, from the given options, is the only one that will protect you from the X-rays.
If you want to learn more, you can read:
https://brainly.com/question/13561128
The acidification of the stomach juices is important for the digestion of proteins because: Group of answer choices Proteins are basic, and need to be neutralized.
Answer:
See the answer below
Explanation:
The acidification of stomach juices is important for the digestion of proteins partly because the enzyme responsible for protein digestion work in an acidic medium and the acid also facilitates the unfolding of the proteins.
Hydrochloric acid and the enzyme responsible for the initiation of protein digestion, pepsin is secreted as gastric juice by the stomach, and the latter works by breaking down protein chains into smaller fragments.
Two students performed the same experiment, testing how far iodine will diffuse through starchy tissue, such as potatoes. They cut 5 potato squares each, all of equal sizes, and placed them into small cups with iodine solution for 15 minutes. Then they measured how far from the edge of the potato the iodine diffused into the potatoes, in millimeters.
Distance Diffused (mm)
Trial 1 Trial 2 Trial 3 Trial 4 Trial 5
Student 1 3.25 3.17 3.26 3.64 3.44
Student 2 3.14 3.43 3.22 3.37 3.28
1. What is the range of student 1's results?
a. 3.35
b. 0 29
c. 0 47
d. 3 29
2. Why do scientists conduct experiments?
a. To test their results.
b. To test a hypothesis.
c. To test a conclusion.
d. To explain an observation.
Answer:
Option c
Option b
Explanation:
To calculate range: range is highest data value - lowest data value
where the highest value in student 1's result is 3.64 and the lowest value is 3.17
Thus, the range of student 1's result is
3.64 - 3.17 = 0.47
Scientists conduct experiments to test a hypothesis. For a scientific research, the researcher first form hypotheses on a particular question she wants answered or maybe she is curious about something. An experiment is then carried out to further test the validity of the hypothesis so as to be able to make a conclusion.
Answer:
A
Explanation:
bc