The substrate sequence recognized by protein kinase A (PKA) is R-R-G-S-I. The pseudosubstrate sequence found within the regulatory domains of PKA is R-R-G-A-I. Draw each sequence as a peptide. Describe the role of each amino acid (in both sequences).

Answer:

The strong always survive, whereas the weak always die.

Explanation:

Natural selection is also called "Survival of the fittest".

A is wrong

B could be the answer but E makes more sense.

C true, but that's not what natural selection is about.

D not true mutations aren't always harmful, I gave a full detailed answer on that I think.

E that's basically survival of the fittest so I think it's right.

If this helped you, please mark me brainliest.

Answer:

it's option D

Explanation:

scientist specialize in that area because single celled organisms form the basis of evolution. According to the scientist the first living thing on Earth were the single celled organisms.

Answer:

single-celled organisms are the least understood in the ocean

2 ) Fertilization

Fertilization is the process in which gametes (an egg and sperm) fuse to form a zygote. The egg and sperm are haploid, which means they each contain one set of chromosomes; upon fertilization, they will combine their genetic material to form a zygote that is diploid, having two sets of chromosomes. A zygote that has more than two sets of chromosomes will not be viable; therefore, to ensure that the offspring has only two sets of chromosomes, only one sperm must fuse with one egg.

In mammals, the egg is protected by a layer of extracellular matrix consisting mainly of glycoproteins called the zona pellucida. When a sperm binds to the zona pellucida, a series of biochemical events, called the acrosomal reaction, take place. In placental mammals, the acrosome contains digestive enzymes that initiate the degradation of the glycoprotein matrix protecting the egg and allowing the sperm plasma membrane to fuse with the egg plasma membrane. The fusion of these two membranes creates an opening through which the sperm nucleus is transferred into the ovum. Fusion between the oocyte plasma membrane and sperm follows and allows the sperm nucleus, centriole, and flagellum, but not the mitochondria, to enter the oocyte. The nuclear membranes of the egg and sperm break down and the two haploid genomes condense to form a diploid genome. This process ultimately leads to the formation of a diploid cell called a zygote. The zygote divides to form a blastocyst and, upon entering the uterus, implants in the endometrium, beginning pregnancy.

image

Process of fertilization: (a) Fertilization is the process in which sperm and egg fuse to form a zygote. (b) Acrosomal reactions help the sperm degrade the glycoprotein matrix protecting the egg and allow the sperm to transfer its nucleus.

To ensure that no more than one sperm fertilizes the egg, once the acrosomal reactions take place at one location of the egg membrane, the egg releases proteins in other locations to prevent other sperm from fusing with the egg. If this mechanism fails, multiple sperm can fuse with the egg, resulting in polyspermy. The resulting embryo is not genetically viable and dies within a few days.

Cleavage, the Blastula Stage, and Gastrulation

A zygote undergoes rapid cell divisions (cleavage) to form a spherical ball of cells: the blastula; this will further develop into a blastocyst.

Answer:

good for you lol

Explanation:

Answer:

true

Explanation:

backed up by the levels of organization

Answer:

Complete the following problems using the equation:

Students are not required to memorize this formula but must know the meaning of the symbols:

D = diversity index

N = total number of organisms of all species found

Σ = the sum of

n = number of individuals of a particular species

D is a measure of species richness. A high value of D suggests a stable and ancient site, and a low value of D could suggest pollution, recent colonization or agricultural management. The index is normally used in studies of vegetation but can also be applied to comparisons of animal (or even all species) diversity.

Example: A lake contains 934 brown trout, 733 smallmouth bass, 34 catfish, 2003 carp,

234 steelheads, and 32 northern pikes.

Fish

Number (n)

n(n-1)

Brown Trout

934

934 x (934-1) = 871422

Smallmouth Bass

733

733 x (732) = 536556

Catfish

34

34 x (33) = 1122

Carp

2003

2003 x (2002)=4010006

Steelheads

234

234 x (233)=54522

Northern Pike

32

32 x (31)=992

Total (N)

3970

= 5 474 620

= 3970 x 3969 = 15 756 930

D = = 2.88

Simpson’s Diversity Index – Practice Problems

When comparing two or more samples, the location with the larger D has a greater amount of diversity. Note that a higher total population does not indicate higher diversity.

An area of the Black Forest in Germany contains 134 pitch pines, 24 douglas firs, and 53 red pines.

A meadow contains 1532 chestnut oaks, 342 black cherry trees, 12 white ash trees, and 1022 yellow birches.

Your backyard contains 12 fleas, 34 aphids, 84 ants, 93 beetles, and 1 butterfly.

An African National Park contains 15 lions, 94 giraffes, 1000 wildebeests, 50 elephants, and 5 hyenas.

Mindo (a city in Ecuador) has 832 toucans, 392 red headed barbets, 3 golden headed quetzals, 500 tanagers, 899 parrots, and 50 white capped dippers.

Answer the following questions in your workbook:

Calculate Simpson’s diversity index for each location. Include the table in your workbook.

Distinguish the differences in diversity between two locations listed above.

Explain what may lead to those differences.

Outline the significance of the Simpson’s Diversity Index. You may refer to the following online resource and your textbook to help outline your ideas - http://www.countrysideinfo.co.uk/simpsons.htm

Answer:

A. so that less energy is lost in cold environments.

Explanation:

When it’s cold outside, your body makes sure to keep the blood flowing to your core and vital organs to keep them warm. This can change the amount of blood flow to your hands and feet, making them feel cold. This is normal. The blood vessels in your hands and feet constrict (spasm) when it’s cold, to prevent heat loss from your core

Options 1 and 2 can be tested through experimental procedures.

In conclusion, only Options 1 and 2 can be tested through experimental procedures.

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Answer:

jellyfish, reptiles, mammals

Explanation:

I took a test on edg in 2021

The lists in the correct order of evolutionary history is jellyfish, reptiles, mammals.

This is the process which involves the modification of structures in

organisms as a result of natural selection thereby making them more fit in

the environment.

The jellyfish has less complex and specialized and mammals has the most

which is why option D is the most appropriate.

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Explanation:

A is the answer

hope it helps !!

:::::::::

Answer:

False, the body systems have to work together to maintain homeostasis

Hope this helps!

Answer:

D.) It can lead to an increased risk of parasite infection.

Explanation:

Monoculture is a system of farming or cropping whereby a single crop is planted on a given area of land. The opposite of this system of farming is known as multiple cropping, where a variety of crops are cultivated.

One disadvantage of planting a variety of crops over a single crop in monoculture is that it increases the risk of parasite/pest attack on the crops. Parasites and pest can easily shift to the variety of crops planted in the farm.

Answer:

Photosynthesis and ___cellular respiration_____ create a cycle.

They create a cycle because the products of photosynthesis become the __reactants________of cellular respiration.

Cellular Respiration is important because  it converts __glucose________  into usable energy for the body.

Photosynthesis is

important because it provides the atmosphere with ___oxygen________

and gives glucose to other orgamisms.

This makes __autotrophs____producers  that give energy to ___consumers____.

Answer:

A. It is warming faster than previous natural cycles.

Answer:

Cell is the basic , functional unit of life

An atom is the smallest unit of ordinary matter that forms a chemical element .

Answer:

The Troposphere

Explanation:

But in the troposphere, near ground-level, ozone molecules are both air pollutants, threatening the health of living things, and greenhouse gases, trapping heat and contributing to climate change. A small amount of ozone does occur naturally at ground level. Plants and soil release some. Some migrates down from the stratosphere.

Answer:

Explana.

troposphereation:

Answer:

Biopsies are done to detect cancerous cells.

In biopsy, a piece of suspected tissue cut in thin sections is stained and examined under microscope.

Normal cells shows the property of contact inhibition

Whereas cancerous cells appears to have lost this property. And they multiply rapidly giving rise to masses of cells called tumour cells.

Answer:

The term extinction's dictionary meaning, is the process of when a species, plant, or any other term for animal family, goes extinct. In more, basic terms, it means when a certain species of animal dies out completely.

This can happen due to several reasons, some being massive natural disasters. Others die out due to an unknown predator entering an ecosystem in which it doesn't belong, therefore disbalancing it.

Examples of extinct animals are Dinosaurs, but their exact reason for going extinct is unkown, there are only theories.

There are also many animals in danger of going extinct, for example Bees.

Hope this information could be of use to you!

Answer: 5years

Explanation: Breaking down of starch into simple sugar without the deployment of amylase to act on it will take a long period of time (as long as 5years).

Enzyme Amylase saves us a lot of time in converting starch into simple sugars. Instead of taking up to years, Amylase only requires about 10minutes to get the job done. It does this by hydrolyzing starch into maltose, glucose, shorter polysaccharides, and dextrins.

Answer:

What are the necessary components required to start the transcription of a gene?

Explanation:

Initiation. RNA polymerase binds to a sequence of DNA called the promoter, found near the beginning of a gene. Each gene (or group of co-transcribed genes, in bacteria) has its own promoter. Once bound, RNA polymerase separates the DNA strands, providing the single-stranded template needed for transcription.

I Hope this helps!

Initiation.

RNA polymerase binds to a sequence of DNA called the promoter, found near the beginning of a gene. Each gene has its own promoter. Once bound, RNA polymerase separates the DNA strands, providing the single-stranded template needed for transcription.

What is transcription?

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Answer:

the movement of ions or molecules across a cell membrane into a region of higher concentration, assisted by enzymes and requiring energy.

Answer:

Hi, there, but I don't see multiple choices. May you please give me the answer choices. So I can help you

Explanation:

THYMINE

When dealing with base pairing in DNA...

g pairs with c and c with g.

a pairs with t and t with a.

But when dealing with base pairing involving RNA...

a pairs with u and u with a.

t pairs with a.

Hope this helped, if it did please mark me brainliest!

(I had misread your question before. Uracil couldn't be that base because it's not in DNA, and is in translation.)

Answer:

A) The loop did not cross into quadrant 1 when streaking quadrant 2

Explanation:

The streak for isolation technique is a method used to get isolated bacterial colonies. This technique consists of, in a petri dish with culture medium, where, with the help of an inoculation loop, the bacteria are scratched on one side of the dish. This side is called the first quadrant. This inoculation loop must then cross with the first quadrant and be dragged to the second quadrant, where new lines must be made. This allows a part of the bacteria from the first quadrant to be carried over to the second. The inoculation loop must cross the second quadrant again to inoculate the third quadrant, and so on.

In this case, we can see that for bacterial colonies to grow in all quadrants, it is essential that the loop crosses in the first quadrant to cross out the second quadrant. If not, only the first quadrant will have bacterial colonies.

Answer:

A) The loop did not cross into quadrant 1 when streaking quadrant 2

Explanation:

There are many different techniques to isolate bacteria populations. Using solid media such as agar, you can perform the streak for isolation technique.

What you want to do by using this technique is to get an isolated colony of the bacteria of interest. And to get it, you need to dilute a sample or inoculum of bacteria as much as possible by streaking it. Every time you do it, you take fewer amounts of cells from the original sample, separating them each time more, to the point of having only one single cell apart by a few millimeters from another cell. The isolated cell divides and forms a new pure colony.

So basically, you need to imaginary divide the agar plate into four quadrants.

The correct answer is A. 0N, as there is no net force acting on the box.

The net force in this scenario can be determined by calculating the difference between the applied force and the opposing force. In this case, if you are pushing on a box with a force of 5N, and the box pushes back with an equal force of 5N, the net force would be zero.

Net force is the vector sum of all the forces acting on an object. In this situation, the applied force of 5N is countered by the opposing force of 5N exerted by the box. Since the forces are equal in magnitude and opposite in direction, they cancel each other out.

When the net force is zero, it means that the forces are balanced, resulting in no acceleration or movement of the object. The box would remain at rest or continue moving at a constant velocity if it was already in motion.

Therefore, the correct answer is A. 0N, as there is no net force acting on the box.

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Answer:

D. It travels fastest and Stronger gravitational pull when closer to sun.

Explanation:

The statement which describes a planet as it moves along its orbit is: D. It travels fastest and experiences a stronger gravitational pull when it is closest to the sun.

A planet can be defined as a large astronomical (celestial) body that has sufficient mass to allow for self-gravity and make it assume a nearly circular shape, which is known as hydrostatic equilibrium.

Generally, a planet revolves in its orbit around the Sun in the solar system and it has a cleared neighborhood.

In conclusion, when a planet is closest to the Sun, it travels fastest and experiences a stronger gravitational pull as it move along its orbit.

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Answer:

Explanation:

The objective of the information given is to calculate the apparent digestible dry matter present in the feedstuff(%) and the apparent digestibility of the protein?

From the given information:

The apparent digestible dry matter present is:

[tex]=\dfrac{ (\text{Dry matter fed to the pig} - \text{Fecal matter of the pig} )}{\text{Dry matter fed to the pig}} \times 100 \%[/tex]

where;

Dry matter fed to the pig = 2kg = 2000 g

Fecal matter of the pig = 200

∴

The apparent digestible dry matter present = [tex]\dfrac{2000-200}{2000}\times 100\%[/tex]

[tex]=\dfrac{1800}{2000}\times 100\%[/tex]

= 90

Amount of Nitrogen(i.e. the protein) content present in the feedstuff = 2.41%

i.e.

2.41 g/100 g   OR   48.2 g/2000 g feed

Amount of protein present in feces = 4.6% (4.6 g/100 g  OR  9.2g/200g of feed)

∴

apparent digestibility of the protein is:[tex]=\dfrac{\text{Amount in feed }- \text{Amount in feces}}{\text{Amount in feed }}\times 100[/tex]

[tex]= \dfrac{(48.2 - 9.2)}{48.2}\times 100[/tex]

[tex]= \dfrac{39}{48.2}\times 100[/tex]

= 81%

Answer:

Yes

Explanation:

It is important because if he does not know, he may be hammering a nail with a wrench. That may break the wall itself.

Answer:

Yes definitely

Explanation:

if they dont have the right tool something can go wrong