Prokaryotic and eukaryotic cells have a few differences, and some or them are related to the process of transcription. The first difference is that in prokaryotic cells, the transcription and also the release and processing of the RNA takes place in the cytoplasm, while in eukaryotic it occurs in the nucleous. A second point is that the transcription and translation happen at the same time in prokaryotic cells and in different moments in eukaryotic. Also, in prokaryotic cells the RNA polymerases are composed by 5 polypeptides and the transcription doesn`t require factors for its initiation. In eukaryotic cells, the RNA polymerases are composed by 10 polypeptides or more, and the transcription requires transcription factors in order to initiate.
Why the excretion process is important?
Excretion is the process by which metabolic wastes and other non-useful materials are removed from an organism. Through excretion, the electrochemical composition of intracellular and extracellular fluids is regulated, thus ensuring the vital functions of the organism. The human body carries out waste excretion processes through the skin, the lungs, the digestive system, and the kidneys.
Then, we can conclude that the correct answer is:
Answer:Excretion is an essential process in which waste products are removed from the organism. Without excretion, waste products build up in the organism and cause serious health issues.
compare organism peers G and H, I and J, and K and L these organisms could have been members of the same species at one point, but are now different species because natural selection has changed each population over time. What are three things that may prevent organisms from eating and or producing fertile offspring?
There are different mechanisms involved in whcih organisms are unable to reproduce.
1. The organisms G and H are separated geographically. These organisms are unable to mate because they cannot be in contact with each other.
2. The organisms I and J are not also able to reproduce offspring since their reproductive organs are incompatible with each other. The reason is probably caused by the shape of the reproductive organs, location, or the differences in size that inhibits the individuals from coupling because the sexual organs do not fit together. So, mating probably won't happen.
3. The organisms K and L are also unable to reproduce offspring because of the differences in their feeding mechanisms. This could be under behavioral isolation since the two organisms are different in some ways; hence they are incompatible with each other.
which of your fossils is most likely heterotrophs? which of them are autotrophs? how do you know? (please answer, every single tutor on this app can’t seem to do 10th grade work)
Considering that, we could name each organism in the images. Fossil A would be from an ancient mollusk (animal), fossil B would be from an ancient fern (plant), fossil C from an ancient arthropod known as trilobite (animal), and fossil D from a bivalve, another mollusk (animal).
To find the gross primary productivity of a region, A. subtract energy lost to respiration from the GPP B. multiply the GPP by energy lost to respiration C. add energy lost to respiration to the NPP D. multiple the GPP by the NPP
The correct answer is C. add energy lost to respiration to the NPP. Gross primary productivty refers to the total amount of carbon produced by a region, which accounts for both metabolic compounds (which will be consumed) and structural compounds (which will endure as they represent the structural basis of the organism).
fqjDavid was thinking of a number. David adds 7, then divides by 8 to get an answer of 4. What was the original number?
The number is 25.
Given:
David adds 7 to a number and then divides it by 8 to get an answer of 4.
To Find:
The original number.
Solution:
To find the number we will follow the following steps:
Let the number be X.
On adding 7 n number X result will be X + 7
Now,
Dividing the X + 7 by 8 David gets 4.
So,
(X + 7 )/8 = 4
X + 7 = 8 × 4
X + 7 = 32
X = 32 - 7
X = 25
Henceforth, The number is 25.
City B is located in the Northern Hemisphere. How can you tell?A) Has similar monthly averages of precipitationB) Has varying monthly averages of precipitationC) Has the warmest average temperatures in July and AugustD) Has the warmest average temperatures in January and February
You can tell City B is in the Northern Hemisphere because it has the warmest average temperatures in July and August. (option C)
Which neurotransmitter would you expect to see in high quantities, if you could, in the brain of someone who has just been rewarded with a large raise in salary for all his or her hard work?Question options:A) SerotoninB) EpinephrineC) DopamineD) Acetylcholine
BIOLOGY > HUMAN BIOLOGY > HORMONE
EXPLANATION:
>Serotonin = It is one of the hormones known as "happy hormones". It is important for mood regulation, memory and cognition processes, and sleep.
>Epinephrine = It is more known as adrenaline and is a hormone that is released during strong emotions like fear or anger.
>Dopamine = It is one of the hormones known as "happy hormones". It is important for movement, coordination, and compulsion.
>Acetylcholine = It is important for muscle contraction.
ANSWER: A
I need help with this practice Give your best estimated answer
The humsn have introduced invasive species to Galapagos Island's, that out-compete natives species and impact the habitat in the island, being the most common associated threat to fish population in the island. However, between the options in the question the one that is greatest poses is the overfishing.
Please help answer this question by at being a checkmark for which organism development
Dragonfly has: wings, larval stage
Beetle has: wings, foldable wings, larval stage
Bee has: wings, foldable wings, larval stage, stinger
Dragonflies spend most of their time in their aquatic larval stage. They do not have the ability to fold their wings during resting.
Beetles' wing covers the abdomen and they too have larval stage.
Bee has all the characteristics given during their development.
What type of nervous system disease is characterized by sudden surges ofelectrical activity that result in uncontrolled movement or unconsciousness?A. Parkinson'sB. EpilepsyC. StrokeD. Tourette's
Answer: B. Epilepsy
Explanation: Epilepsy is a disorder of the brain characterized by repeated seizures. A seizure is usually defined as a sudden alteration of behavior due to a temporary change in the electrical functioning of the brain. Normally, the brain continuously generates tiny electrical impulses in an orderly pattern.
Question 13Which environmental group is most closely associated with mountain climbing, backpack-ing, and camping?A Environmental Defense FundB GreenpeaceC Sierra ClubD World Wildlife Fund
The answer is option C: Sierra club
Explanation:
-The Sierra Club Foundation owns and operates the historic Shasta Alpine Hut. The property is popularly known as "Horse Camp,"
-Horse Camp ensures a reliable supply of fresh water.
-There are plenty of cleared campsites after the snow melts out. A fire ring in front of the hut offers climbers and campers a place to socialize on summer evenings.
-The Phoenix solar-powered, composting toilet converts human waste into a non-toxic end product, making it easier to practice low impact camping.
Yeasts are unicellular microorganisms of the fungi kingdom. They are facultative anaerobe, which means that they can respire or ferment depending upon environmental conditions. In the presence of oxygen, respiration takes place (aerobic respiration). The process requires sugar and oxygen and produces water and carbon dioxide as metabolic waste products. The formula is: ??
answer and explanation
aerobic respiration formula = C6H12O6 + 6O2 -> 6CO2 + 6H2O + energy
16. What distinguishes fully modern humans (Homo sapiens) from their mostrecent predecessors?A. development of bipedalismB. development of cultural expressions such as the domestication of animalsC. use of stone tools
What distinguishes fully modern humans from their most recent predecessors is the development of cultural expressions such as the domestication of animals. As they were both bipedal, and could use stone tools.
The correct option is B.
List a few differences between phages and animal viruses.
Solution:
Remember that viruses that infect bacteria are called bacteriophages. In effect, bacteriophages inject DNA into the host cell, while animal viruses enter by endocytosis or membrane fusion.
The differences between bacteriophages and animal viruses can be detailed in the comparison of their Multiplication Cycles:
Attachment:
For bacteriophages, tail fibers attach to cell wall proteins. Whereas, in animal viruses, the attachment sites are plasma membrane proteins and glycoproteins.
Penetration:
In bacteriophages, Viral DNA is injected into the host cell. Whereas, in animal viruses, the capsid enters by endocytosis or fusion.
Uncoating:
It is not required in bacteriophages. Whereas, in animal viruses, there is enzymatic removal of capsid proteins.
Biosynthesis:
In bacteriophages, this occurs in the cytoplasm. Whereas, in animal viruses, this process occurs in the nucleus (DNA viruses) or cytoplasm (RNA viruses).
Chronic infection:
In bacteriophages, lysogeny is generated. Whereas, in animal viruses, there is a latency or slow viral infections.
Release:
In bacteriophages, the host cell is lysed. Whereas, in animal viruses, nonenveloped viruses rupture the plasma membrane.
Which sentence describes an example of a living thing obtaining matter orenergy?O A. A plant absorbs sunlight into its leaves.OB. Soil soaks up water after a rainstorm.OC. A tree releases pollen into the air.OD. A rabbit shivers on a cold night.
Biology > Plants > Leaves
The leaves of plants contain chloroplasts, in which there are structures called photosystems that capture sunlight. These photosystems transfer the energy from photons to electrons allowing photosynthesis to occur subsequently. Therefore, the answer is A.
Answer:
A. A plant absorbs sunlight into its leaves.
Three pros and two cons for having a vegan diets
Three pros: Good health, Animal safety, Less environment pollution.
Two Cons: Protein is found in meat, so a diet without protein will cause one to be protein malnutritioned.
Severe weight loss.
is there any life outside of earth?
It is only a fiction or a story that there are extraterrestrial presence outside Earth. Establishment of life beyond Earth was never found. Evidence of alien life that visited Earth was not concluded. But it does not mean that the universe is lifeless. It is up to our astrologists to establish an answer to all those questions of life outside our planet. A great study of the origin of life and the search for life outside Earth will be their largest achievement.
5. Which of the following is the best definition for a karyotypeO a. An organized chart of a cells chromosomesaO b. The process cells complete to divideOc. A high end luxury vehicle from EuropeOd. A random sample of a persons chromosomes
A karyotype is an organized chart of a cell's chromosomes, especially used in clinical medicine to inquire if a patient have a particular disease and look at their possible causes, for example.
i don't understand this question and if you give me the definition in your own words please
We could conceive Muller´s Ratchet, as the following: "An irreversible accumulation of DNA -harm- (in terms of mutations) due to the lack of recombination -genetic diversity-. So, we could say that lack of sexual reproduction, and a continuos style of clonal reproduction (that is, the same copy of the organism) with time accumulate harmful DNA changes. DNA changes (mutations) occur by chance, although their ocurrence is regulated by several mechanisms. But in asexual organisms, or when genetic diversity is low, it tends to accumulate a lot.
Inbreeding is a problem in populations because it: A. reduces the overall migration into the populationB. causes mutations in the offspring C. increases the chance that two of the same deleterious alleles occur in the offspring
Inbreeding is the the matig of individuals closely related in relation to a common ancestry. As the genetic code is inherited from parents, as closely related the individuals are, the bigger is the chance of both individuals having many alleles and genes in common that was passed out through few generations. Therefore, it also increases the chance of both of them having the same deleterious alleles.
So, the correct answer is C. increases the chance that two of the same deleterious alleles occur in the offspring
What is the Meaning of Anatomy
Answer:
it is a branch of medicine that deals with the human body
Answer:
Anatomy is the study of internal structure of plants and animals
PLEASE HELP ME OUT!!!!!!!!!!!!!!!!!!! Please help
In a condition called SIADH, the kidneys retain (keep in) too much water. This dilutes the blood, causing symptoms such as nausea, vomiting, irritability, and confusion. What hormone might be involved in this condition? Explain.
Answer:
antidiuretic hormone
pollution can be a form of chemical substances or energy,such as heat,light, or noise.true false
The above statement is true .
Pollution is adding of harmful substances in the environment that cause adverse changes in environment and living bodies.
There are mainly four type of pollution-
0. Air pollution
,1. Water pollution
,2. Soil pollution
,3. Noise pollution
But as asked in the question,
pollution can be caused by heat,light or noise.These comes under rare type of pollution.
This diagram shows a dihybrid cross between a homozygous dominant yellow (I) round (R) pea plant with a homozygous recessive green (i) wrinkled (r) pea plant. The offspring produced in the F1 generation are all heterozygous IiRr - yellow round pea plants.a. Show the f2 generation Punnet square, when two offspring from the f1 generation cross. b. What is the phenotypic ratio for the outcome above? Put full phenotype descriptions with the ratio. c. This ratio is regarded as the key clue which led Mendel to discover which law? d. From the ratio, how many homozygous pure breed offspring were they eventually after the final cross? Give genotypes of all.
a. The Punnet square for the crossing between two members of the offspring (RrIi x RrIi) is:
b. The phenotypic ratio, then, will be
9 yellow and round pea plants:
1 RRII (homozygous dominant for both traits)
2 RRIi (homozygous dominant for the shape - round -, and heterozygous for the color - yellow)
2 RrII (heterozygous for the shape and homozygous dominant for the color)
4 RrIi (heterozygous for both traits)
3 yellow and wrinkled pea plants:
1 rrII (homozygous recessive for the shape and homozygous dominant for the color)
2 rrIi (homozygous reccessive for the shape and heterozygous for the color)
3 green and round pea plants:
1 RRii (homozygous dominant for the shape and homozygous recessive for the color)
2 Rrii (heterozygous for the shape and gomozygous recessive for the color)
1 green and wrinkle plant:
1 rrii (homozygous recessive for both traits)
c. This is the key for Mendel's law of independent assortment. This law states that the alleles of two or more different genes will be sorted into the gametes independently.
d. The homozygous pure breed can be considered the pea plants that are homozygous for both traits (RRII or rrii), like the original parents that generated the f1 offspring.
Therefore, we have only one homozygous for recessive traits (rrii) and only one homozygous for dominant traits (RRII).
Draw a food web that includes your organism and at least 5 other organisms. My organism is great white shark
Answer:
1° producers: algae, plancton
2° primary consumer: zooplancton
3° secondary consumers: smaller fish and crustaceans
4° tertiary consumers: larger fish, birds and mammals (e.g. tuna)
5° quaternaries consumers: white shark
Sharks are located at the top of the food chain. Thanks to the existence of the shark, the aquatic food chain is kept in total balance and the oceans remain healthy.
1. How can we balance our growing demand for food with our need to protect theenvironment?
Answer:
We need more food and we need it fast. To make sure we produce enough food and at the same time protect Earth´s limited natural resources some measures must be taken:
- Prevent agricultural expansion, production must be increased but maintaining a balance with nature, avoiding harmful agricultural practices such as deforestation, overirrigation and production of greenhouse gas.
- Effective communication between scientists and politicians is key.
- Convince companies to adopt important projects or sustainable practices.
Which of the following types of land is the richest in nutrients and organic material?
Responses...
A. marsh
B. tropical forest
C. desert
D. tundra
Answer: B) Tropical Forests
Explanation: Theses lands have a lot of nutrients!
Which is NOT a benefit of biodiversity?A. natural gasesB. clean air and waterC. foodD. spread of agriculture
The correct answer is D. spread of agriculture. Biodversity implies a plurality of species, which might hamper comercial crops. Nevertheless biodiversity richness and complexity is key to optimal function of ecosystems.
Based on the information in the question above, what is the trait of lactose non-persistence?
It should be choice 1. We have two parents with an identical condicion (lactose persistent), let's say they are LL or Ll, thus they could form the following gametes: L or l, so the possible outcomes (genotypes) when their gametes combine are: LL, Ll, lL, ll. Assuming the lactose persisten trait is dominante, either, LL, Ll, lL will show lactose persistance, the only genotype that will display a different phenotype is, ll. So, lactose non-persistence is a recessive trait choice 1.
describe the difference between the structure and function of rough ER and smooth ER (2 marks)
Solution:
The endoplasmic reticulum is a network of interconnected membranes that branch throughout the cytoplasm of a eukaryotic cell, forming flattened tubes and sacs (ER). Parts of the ER contain ribosomes, which are temporarily attached to the outer faces of its flattened sacs.
The rough endoplasmic reticulum (ER):
The region of the endoplasmic reticulum that contains ribosomes is called the rough endoplasmic reticulum or RER.
STRUCTURE: By electron microscopy, these regions are seen flattened and with granules (the ribosomes)
FUNCTION:
This region has two functions:
1. Secrete certain newly synthesized proteins out of the cytoplasm and transport them to other places in the cell.
2. When proteins are inside the RER, they are chemically modified in order to alter their function and final destination.
The Smooth endoplasmic reticulum (SER):
STRUCTURE:
The smooth endoplasmic reticulum is more tubular in build and lacks ribosomes.
FUNCTIONS:
1. Chemically modifies small molecules taken up by the cell. This is especially true for drugs and pesticides.
2. In animal cells, the smooth endoplasmic reticulum is the site where glycogen hydrolysis occurs in animal cells.
3. It is the site for lipid and steroid synthesis.
4. Within the lumen of the smooth endoplasmic reticulum, proteins that have been synthesized in the ER are chemically modified