Answer:
100
Explanation:
in sexually reproduction gametes are formed by meiosis where number of chromosome is reduced by half(haploid gametes)
Which of the following is the largest known gravitationally bound structure in the universe?
Which of the following is the largest known gravitationally bound structure in the universe?
Galaxy
Cluster
Solar system
Local Group
Answer:
Cluster
Explanation:
A cluster is the largest gravitationally bound object in the universe.
Answer:
Cluster
Explanation:
A cluster is the largest gravitationally bound object in the universe.
21. Evidence in support of the importance of endosymbiosis in the evolution of
eukaryotic cells is:
a, Organelles that have their own unique unique DNA and ribosomes
Organelles that have a double membrane
6. Organelles are in the same size range as free living prokaryotes
d. All of the above
Answer:
d. All of the above
Explanation:
The theory of endosymbiosis is important as it explains the evolution of eukaryotic cells from prokaryotic cells.
This theory also explains the origin of chloroplast and mitochondria. Several evidences in support of the importance of endosymbiosis in the evolution of eukaryotic cells are as following:
Organelles have their own separate DNA and ribososme.Organelles that have a double membrane (inner and outer).Organelles are in the same size range as free-living prokaryotes.Chloroplast and mitochondria are the examples of such organelles.
Hence, the correct answer is "d".
Angiosperms (flowering plants) and vertebrates obtain nutrients from their environment in different ways. a. Discuss the type of nutrition and the nutritional requirements of angiosperms and vertebrates. b. Describe 2 structural adaptations in angiosperms for obtaining nutrients from the environment. Relate structure to function. c. Interdependence in nature is evident in symbiosis. Explain two symbiotic relationships that aid in nutrient uptake, using examples from angiosperms and/or vertebrates. (Both examples may be angiosperms, both may be vertebrates, or one may be from each group.)
Answer:
a. Angiosperm are plants (autotrophs) that use photosynthesis to produce their own food, while vertebrates are animals (heterotrophs) that obtain their food from other organisms. Vertebrates include fish, amphibians, reptiles, mammals and birds.
b. Adaptations in angiosperms include two reproductive structures 1- fruits (ovaries), whose main function is to disperse the seeds and 2- flowers that ensure pollination and protect the embryo sac during its formation.
c . Examples:
1- The mycorrhizal symbiosis between plant roots and symbiotic fungi plays a key role in nutrient uptake from the soil. Arbuscular mycorrhizal is a type of symbiosis where a fungus of the phylum Glomeromycota penetrates the cortical root cells of vascular plants to produce specialized structures named arbuscules.
2- Microflora in the vertebrate digestive tract. The microorganisms that live in the digestive tract of vertebrate species are beneficial for the absorption of nutrients. For example, in humans, Saccharomyces boulardii has shown to have a probiotic effect by increasing intestinal homeostasis, thereby enhancing nutrient uptake.
Why does deleting just one nucleotide cause a dramatic change in the amino acid sequence produced by translation
Answer:
The deletion changes the genetic code.
Explanation:
The sequence of nucleotides determines the order of amino acids in a protein, the order of amino acids determines the shape and the shape determines the function. A very good example of one misplaced nucleotide having tremendous effects is sickle cell disease, where thymine is replaced with adenine(CAC instead of CTC). It means that glutamic acid is replaced with valine. This alters the shape of the protein(Beta chain of hemoglobin). So the red blood cells are deformed and carry a lot less oxygen leading to a lot of symptoms just because of one misplaced letter.
Through which vascular tissue do water and nutrients get transported to reach the leaves during transpiration? cuticle parenchyma xylem phloem
Answer:
Xylem is one of the two types of transport tissue in vascular plants, phloem being the other. The basic function of xylem is to transport water from roots to stems and leaves, but it also transports nutrients.
Explanation:
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Answer:
C. xylemExplanation:
i tack test
Which type of organism developed first?
al
answer: algae
explanation: because the were the first ones to adapt with water and land...
why the swimmer push the water backward
Answer:
[tex]\boxed{\mathrm{view \: explanation}}[/tex]
Explanation:
Swimmers push water backwards to propel forwards. In other words, swimmers push their hands and legs against water to move forward. This is stated in the third law of motion, for every action, there is an equal and opposite reaction.
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:
All living organisms require energy for their life processes. In nature, this energy source is obtained by feeding on one another. When one organism eats another, it gets energy. In this case, a large whale is described to be reliant on a photosynthetic phytoplankton for its energy source.
The phytoplankton is capable of producing its own energy source (food) via the process of photosynthesis. Hence, making it an autotrophic organism. However, since the large whale is dependent on the phytoplankton for food/energy source, it is regarded to be heterotrophic i.e. incapable of producing its own food, hence, depends on other organism like phytoplankton in this case.
Answer:
a
Explanation:
Which statement best describes how Watson and Crick's model used other scientists work to create a model of DNA?
They used Chargaff's rule to determine that it contains ribose sugar
O They used Franklin's photo to determine that DNA was a double helix.
They used Levene's work to determine the number of base pairs in each strand.
O They used Nirenberg and Matthei's studies to determine that DNA is made of nucleotides.
Answer:
b.
Explanation:
They used Franklin's photo to determine that DNA was a double helix.
The best statement that describes how Watson and Crick's model used other scientists' work to create a model of DNA can be seen in the second Option.
They used Franklin's photo to determine that DNA was a double helix.
The early 1950s saw the development of the renowned model of the DNA double helix by American scientist James Watson and British physicist Francis Crick. They were the explorers to pass the finishing line in this scientific race.
Rather than doing fresh tests and experiments in the lab, Watson and Crick primarily gathered and evaluated existing data, combining it in novel and illuminating ways.
Franklin was a specialist in X-ray crystallography, a sophisticated approach for identifying molecular structures. When an X-ray beam strikes the crystallized form of a molecule, e.g the DNA, part of the rays are redirected and diverted by the atoms in the crystal, creating a diffraction pattern that unveils data information regarding the structure of the molecule.
Franklin's crystallography provided crucial hints to Watson and Crick on the structure of the DNA model. Some of them originated from Franklin's extraordinarily clear and stunning X-ray diffraction photo of DNA.
According to the work of Phoebus Levene, Levene only posits that the DNA was formed of subunits called nucleotides.
Erwin Chargaff speaks volumes on the determination of the composition of ribose sugar bases.
Therefore, we can conclude that Watson and Crick knew about all these Phoebus Levene and Erwin Chargaff postulates and experiments but it was Franklin's work on X-ray diffraction photos of DNA that gave them a crucial hint to create a model for the DNA.
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All of the following would be visible on a karyotype except
aneuploidy.
polysomy.
trisomy.
homologous chromosomes.
Answer: I think aneuploidy id wait for someone else to confirm this
Explanation:
All of the following would be visible on a karyotype except is aneuploidy
How to identify karyotype?The normal karyotype of the species is described as 46, may XX or XY, in which the first number of chromosomes is followed by a comma indicating the chromosomes. Thus, 46, XX corresponds to the karyotype of a woman; and 46, XY represents a male karyotype.
Aneuploidy is the presence of an abnormal number of chromosomes in a cell so this is the exception.
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Where is the last storage location for melted snow? (2 points) Where is the last storage location for melted snow? (2 points) Group of answer choices Rivers Ocean Streams Mountains
Answer:
Ocean
Explanation:
Ice is usually found in the glaciers in the mountains and once it gets heated it flows down through melting and forms a stream and enters into rivers and these streams combine and lead to the oceans. Thus these oceans become the ultimate storage units of melted snow. Ice and cannot stay in solid-state for too long.a strand of dna contains the base sequence AGTT . What is the sequence of the complimentary strand of DNA
Answer:
The sequence is TCAA
Explanation:
Deoxyribonucleic acid (DNA) is a molecule composed of two complementary chains of nucleotides. The nucleotides are in turn composed of one nitrogenous base, one deoxyribose sugar, and one phosphate group. The four different types of nitrogen bases found in DNA are thymine (substituted by Uracil during RNA transcription), adenine, cytosine and guanine. These bases bind by complementary base pairing to form an antiparallel double-strand. The complementary base pairing rule states that thymine forms two hydrogen bonds with adenine, while cytosine forms three hydrogen bonds with guanine.
Answer:
TCAA
Explanation:
A matches to T and G matches to C.
Which of the following statements best describes communication style versatility?
The early bird gets the worm.
You can t judge a book by its cover.
I cannot control you, but I can control myself
alf a loa better than none
Answer:
I cannot control you but I can control myself.
Explanation:
Communication style versality is the ability to identify and understand way or taste of communication and adapt to it in order to make people open and receptive to it there by creating intimate relationships with people.
The features of communication style versality is I cannot control you but I can control myself in the sense that I will have to understand different styles and communication preference, then adapt to it by controlling myself, in me controlling myself people will tend to be open and receptive to it and intimate relationships will be built. I can't control other people but I will have to control or work on myself.
Which of these lymphoid organs destroys bacteria before it can breach the intestinal wall and generates "memory" lymphocytes for long-term memory?
Answer:
Peyers patches
Explanation:
Peyers patches are group of lymphoid follicles found in the ileum of the small intestine.
This part of lymphatic system form part of immune system that help to control bacteria population in the small intestine and prevent the growth of pathogenic bacteria in the small intestines. It plays an important role in immune surveillance where it recognises pathogenic bacteria and destroy the bacteria.
It is a lymphoid organs destroys bacteria before it can breach the intestinal wall and generates "memory" lymphocytes for long-term memory because it form the part of the immune system which help to fight infection or foreign substances in the body, also by generating lymphocytes which is a white blood cells of the immune system which generate long term memory of foreign pathogens and destroying it.
Classify each nutrient as a macronutrient or as a micronutrient
Answer:
Macro: Phosphorous, Protein, Fat, Carbohydrates
Micro: Vitamin A, Sodium
Explanation:
Macronutrients are nutrients that are needed in large amounts. Micronutrients are needed in smaller amounts.
How can protists exhibit both animal-like and plant-like characteristics?
A heterotrophic and chlorophyll protist
Food is ingested by protists in three forms. We produce, eat and digest their own organic molecules. Meat ingestion or english bacteria ingests protists. The cell wall and cell membrane are stretched to create an alimentary vacuolum around the foodstuff. Enzymes extract the food inside the food vacuole. At the other side, absorbent protists consume food molecules through their cell membrane by diffusion. In decomposition, absorbent protists play a crucial role. They are assumed to be essential decomponents. Light energy is used to make your own food by big farmers including photosynthetic protists.
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Hope this helps!
Brainliest would be great!
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With all care,
07x12!
A pharmaceutical company is working on a drug to slow the spread of Ebola. Which of the following should be the company's focus?
a. Sanitizing the drinking water
b. Protecting the food supply
c. Person-to-person contact
d. Killing the insect vector
Answer:
C
Explanation:
Although Ebola isn't transferred by the air and through touch. Bodily fluids like sweat, saliva, urine, breastmilk, semen, and vomit all transmit the disease, if a person gets it in a cut or is directly introduced by it (sexual intercourse.)
2 Diseases of a cassava
The overall outcome of the activities carried out under the CaCESA initiative
will improve cassava production and productivity. The effectiveness of
program is based on five axes:
- provision of healthy cassava cuttings to vulnerable families;
- the organization of extensive awareness and communication campaigns;
- national and regional coordination of actors in the production chain and
cassava post-production;
- the improvement of cultivation, processing and conservation practices
cassava;
- control and management of the spread of diseases, whether they are transmitted
insects and / or infected cassava cuttings.
To achieve these results, it will be necessary to build capacity at different
levels. The objectives will be achieved through the implementation of appropriate activities
Explanation:
Answer:
Explanation:
Oidium manihotis
Root Rot Pathogens
what is the importance of autotrophic organisms for other organisms?
Answer:
the importance of autotrophic organisms with respect to energy flow and nutrient cycling in ecosystems. Primary producers usel solar or chemical energy to manufacture their own food and they use this energy through cellular respiration and growth and reproduction--energy used for NPP.
What do you think would happen if there was more glucose (sugar) than available NAD+? Explain.
Answer:
n people who have developed diabetes, glucose builds up in the blood, resulting in hyperglycemia. ... And, too much sugar in the bloodstream can cause other types of damage to body tissues, which can increase the risk of heart disease and stroke, kidney disease, vision problems, and nerve problems in people with diabetes.
Explanation:
How did the research presented in the article affect scientists’ understanding of the evolution of eukaryotes.
Answer:
Archaea and eukaryotes are very closely related than bacteria and eukaryotes. because both archaea and bacteria responsible for the formation of more complex cells
Explanation:
It has been believed for many years that archaea and eukaryotic cells are genetically related to a developmental process that involves the production of eukaryotic cells by archaea development. At the same time, scientists believe that archaea have more to do with eukaryotic cells than bacteria. This is because research shows that bacteria are also closely related to eukaryotic cells, meaning that along with archaea, bacteria are part of the evolutionary process that makes up these cells.What makes ribosomal RNA useful as a molecular clock? (2 points) A large portion of the DNA ring is not vital to structure or function, allowing it to accumulate neutral mutations. Its rate of mutation increases over time as organisms continue to evolve and differentiate from each other. A slow mutation rate makes it useful for determining evolutionary relationships between ancient species. It is only found in select organisms, making it easier to compare relationships between species that have it.
Answer:
The correct statement is that a slow mutation rate makes it useful for determining evolutionary relationships between ancient species.
Explanation:
The rRNA or ribosomal RNA has an application as a molecular clock because of many factors. It exhibits a very slow mutation rate, that is, around one million years because of which it stays highly conserved in all the organisms. In the ribosomal RNAs of two organisms, the degree of mutations can be associated directly with the time they were originated in the past.
In supplementation, it possesses essential biological function because of which it can be witnessed in almost all the species.
Answer:
A slow mutation rate
How do plants get the nitrogen they need?
A.
From bacteria living in their roots
B.
From the air
C.
Directly from the soil
D.
Through photosynthesis
Which feature separates humans from other primates? smaller brain size bipedalism use of tools complex social skills
Answer:
Bipedalism.
Explanation:
Bipedalism is a human's ability in which they can use their two hind legs to run or walk without the help of their front limbs, unlike other primates.
Answer:
Bipedalism
Explanation:
i took the test and failed
14. Which of the following may produce more than one functional protein
from an mRNA transcript?
a. chromatin condensation c. epigenetics
h transcrintional regulation d. alternative mRNA processing
Answer:
D. Alternative mRNA processing.
Explanation:
Which of these is an example of a haploid cell?
Answer:
Gametes
Explanation:
Gametes are an example of a haploid cell and are produced as a result of meiosis.
Write the numbers in the correct order to sequence the food through the digestive tract. 1- Peristalsis begins in the esophagus. 2- Food is pushed into the throat with the tongue. 3- Epiglottis closes to allow food to pass to the esophagus. 4-Chyme mixes with digestive enzymes. 5- Esophageal sphincter allow food to pass to the stomach. 6- Food is mixed with digestive juices forming the chyme that moves to the small intestine. 7- Stool moves to the rectum then to the anus. 8- Digested nutrients move to the blood. 9- Water is absorbed and waste is transformed into the stool. 10- Waste product moves into the large intestine. )
Answer:
2: food is pushed into the throat with the tongue, 3 epiglottis closes to allow food to pass esophagus, 1 peristalsis begins, 5 esophageal sphincter allow food to pass, 6,4,10, 9,7,8
Explanation:
The uterine cycle describes the cyclic changes of thickening and degeneration that the endometrium goes through in a month. What is the order of events in one uterine cycle
Answer:
During the uterine month there are different phases through which the uterus passes, these phases are regulated by hormones and are responsible for producing the cycle necessary for fertilization.
Phase where menstruation occurs: This phase only happens if the woman was not fertilized and did not develop the diploid cell together with a sperm, since not being fertilized, all the uterine preparation that had been planned in the body for fertilization will be released as that we know "menstruation", in this phase estrogens and progesterone are low. The inner walls of the unfertilized uterus are released.
Follicular phase, in the follicular phase the ovaries prepare to release an egg and estrogen begins to rise. (From the first day of the period until ovulation)
Proliferative phase, in the proliferative phase, new vessels proliferate and the outermost layer of the uterus prepares itself for possible fertilization, is where spiral arterioles can begin to form again in the external cut of the myometrium.
Ovulation, here is where the mature ovum is called Graff's follicle, at this time estrogen reaches its peak and then descends.
Luteal phase, in the luteal phase the production of the luteal body is generated, at this stage progesterone takes center stage, and it is the range between ovulation and menstruation (if not fertilized)
Last phase, secret phase, in this phase there are two possible ends, if the woman is fertilized, the egg cell implants and begins the development of the embryo and if it is not fertilized, the entire external cut of the myometrium is prepared to be secreted.
Explanation:
A very important fact to clarify is that women are born with a quantity of ovules that at the end of this uterine cycle ceases to exist, this process is what we know as menopause.
That is to say that women have a quantity of ovules that will one day run out, and the body releases them from the menarche or the first menstruation, generating that in each released ovule a uterine cycle is completed, the day they end the woman will have reached menopause and would have no chance of being fertilized or completing the uterine cycle.
superficial layer of the endometrium is shed
basal layer of endometrium grows, forms gland and blood vessels
enriched endometrial blood supply
endometrial glands secrete nutrients into uterus
Below are two chemical equations. One is for cellular respiration and one is for photosynthesis. Correctly place the reactants and products in the right location to complete both equations.
Photosynthesis: H20 +H20------------->C6H12O6 +O2
+solar energy CO2
Cellular Respiration:O2+C6H1206 -------->CO2 + H2O
+02
Answer:
Photosynthesis: 6CO₂ + 6H₂O + solar energy ----> C₆H₁₂O₆ + 6O₂
Cellular Respiration: C₆H₁₂O₆ + 6O₂ ----> 6CO₂ + 6H₂O + ATP
Hope that helps.
The correct equation for cellular respiration and one for photosynthesis are:
Photosynthesis: 6CO₂ + 6H₂O + solar energy ----> C₆H₁₂O₆ + 6O₂
Cellular Respiration: C₆H₁₂O₆ + 6O₂ ----> 6CO₂ + 6H₂O + ATP
What is cellular respiration?Cellular respiration is a process of converting food into energy that can be used in many processes. It happens when oxygen is combined with food material and releases carbon dioxide as a waste product.
The correct reaction of photosynthesis is when carbon dioxide and water are combined with sunlight to form glucose and oxygen.
The correct reaction of cellular respiration is when glucose and oxygen react and release carbon dioxide and water and energy,
Thus, the correct reactions are:
Photosynthesis: 6CO₂ + 6H₂O + solar energy ----> C₆H₁₂O₆ + 6O₂
Cellular Respiration: C₆H₁₂O₆ + 6O₂ ----> 6CO₂ + 6H₂O + ATP
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Classify the following organisms into their respective kingdoms (i) Yeast (ii) Penicillium (iii) Rhizobium (iv) Mushroom (v) Amoeba (vi) fish
Answer:
(i) Yeast- Kingdom Fungi
(ii) Penicillium- Kingdom Fungi
(iii) Rhizobium- Kingdom Eubacteria
(iv) Mushroom- Kingdom Fungi
(v) Amoeba- Kingdom Protista
(vi) fish- Kingdom Animalia
Explanation:
Living organisms were classified into a large group called KINGDOM, which represent the largest and most generic grouping consisting of organisms that share a few similarities. The kingdoms that living organisms were classified into are as follows: Plantae, Animalia, Fungi, Protista, Eubacteria, Archaebacteria, etc.
Based on the question, the mentioned organisms are classified into the following kingdoms:
(I) Yeast: Yeast is a unicellular microbe classified under the Kingdom Fungi due to possession of chitin in its cell wall and other similar features with members of kingdom Fungi.
ii) Penicillium- Penicillium is a genus classified under the Kingdom Fungi.
(iii) Rhizobium- Rhizobium is a genus of prokaryotic organism (lack membrane-bound nucleus and organnelles) classified under the Kingdom Eubacteria.
(iv) Mushroom- Mushrooms are saprophytic (heterotrophic) species of organisms classified under the Kingdom Fungi.
(v) Amoeba- Amoeba is a genus of unicellular eukaryotes classified under the Kingdom Protista.
(vi) fish- Fishes are organisms classified under the Kingdom Animalia