What percentage is Thymine:
A. 23%
B. 27%
C. 77%
D. 73%
What percentage is Guanine:
A. 23%
B. 27%
C. 77%
D. 73%

Answer:

1. Isovolumetric contraction.

2. Ventricular filling.

3. Isovolumetric relaxation.

4. Ventricular ejection.

Explanation:

In Human anatomy, cardiac cycle can be defined as a complete heartbeat of the human heart which comprises of sequential alternating contraction and relaxation of the atria and ventricles, therefore causing blood to flow unidirectionally (one direction) throughout the human body.

Generally, the cardiac cycle occurs in two (2) stages;

Diastole : in this stage, the ventricles is relaxed and would be filled with blood.

Systole: at this stage, the muscles contracts and thus, allow blood to be pushed through the atria.

The following terms describe the electrical events with the correct phases of the cardiac cycle in mammals (human beings);

1. Isovolumetric contraction: The ventricular muscle cells depolarize at the start of this phase. During this phase, the pressure in the atria is lower than the pressure in the ventricles while the pressure in the arteries is higher than the pressure in the ventricles.

2. Ventricular filling: During this phase, Na+ entry through the funny channels causes the pacemaker potential of SA nodal cells to gradually become less negative until it reaches threshold. It causes the atria to contract at the end of the phase.

3. Isovolumetric relaxation: The ventricular muscle cells repolarize right before this phase. During this phase, all of the four (4) cardiac valves are closed while all of the four (4) chambers are relaxed.

4. Ventricular ejection: The cytosolic concentration of calcium in the contractile cells of the ventricle is highest during this phase. Also, the atrioventricular (AV) valves are closed while the semilunar valves are open.

Answer:

The answer is A

Explanation:

The number of plants will decrease, the number of grasshoppers will increase, the number of snakes will decrease.

Everything that is alive, from microscopic algae to enormous blue whales, depends on food to thrive. Each food web represents a possible route for nutrients and energy to travel through the ecosystem.

As an illustration, grass makes its own sustenance from sunshine. A bunny consumes some grass. Eaten by a fox, the rabbit. When a fox dies, microbes decompose its remains and return it to the soil, where it feeds grass-like plants.

Grass is consumed by a wide variety of animals, and rabbits can also consume other plants besides grass. Foxes can consume a wide variety of animals and plants. These living organisms can all be found in different food chains.

Therefore, The number of plants will decrease, the number of grasshoppers will increase, the number of snakes will decrease.

To learn more about food chain, refer to the link:

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Shadows are evidence of light travelling in straight lines. An object blocks light so that it can't reach the surface where we see the shadow. Light fills up all of the space before it hits the object, but the whole region between the object and the surface is in shadow.

Explanation:

Since the wavelength of light is very small as compared with the size of ordinary object and diffraction of light is not easily noticed and hence the light appears to travel in a straight line.

I hope this was ur answer and I hope this might help u

The birds, because we can see from the food web that the bird eats both grain, a producer, and grasshoppers, a consumer.

Answer:

4

Explanation:

A nucleotide consists of a sugar molecule attached to a phosphate group and a nitrogenous base

Answer:

In the closed circulatory system, blood is confined to a heart and blood vessels, whereas in an open system, hemolymph (blood) moves from a heart through vessels into interconnected spaces called a "hemocoel."

Explanation:

An open circulation the blood is not blood vessels, it instead is pumped into a cavity called Hemocoel.

A closed circulatory system, the blood is pumped through vessels SEPARATE from the interstitial fluid of the body.

Answer:

J

Explanation:

The musculoskeletal system is what enables movement.

The brain signals the body of an animal to move by transmitting electrical impulses through the neurons, and the animal is then able to walk or run because the muscles of the muscular system work with the bones of the skeletal system that is present in option J.

The neuron stimulates the muscle for the movement because the muscle has receptors for the neurotransmitters, such as at the neuromuscular junction, and the neurotransmitters either stimulate or repress the function, depending on the type of neurotransmitter.

Hence, the brain signals the body of an animal to move by transmitting electrical impulses through the neurons, and the animal is then able to walk or run because the muscles of the muscular system work with the bones of the skeletal system that is present in option J.

Learn more about neuron function in muscle activity here.

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Answer: the answer is C

Explanation:

Answer:

c!

Explanation:

For a wave to effectively be produced there need to be large wind, long period of time and a large distance of water. If they are all reduced, then there would be a reduction in the intensity of the wave.

hope this helps!

Answer:

ma'am we need answers choices

Answer:

feedback that regulates and stabalizes

Explanation:

im right it regulates the system

Answer:

Adenine and thymine form base pairs that are held together by two bonds, while cytosine and guanine form base pairs that are held together by three bonds. Bases that bond together are known as complementary. During transcription, DNA is converted to messenger RNA (mRNA) by an enzyme called RNA polymerase.

Answer:

Adenine and thymine form base pairs that are held together by two bonds, while cytosine and guanine form base pairs that are held together by three bonds. Bases that bond together are known as complementary. During transcription, DNA is converted to messenger RNA (mRNA) by an enzyme called RNA polymerase.

Explanation:

Answer:

a mutation that causes female pigs to have less offspring

Explanation:

Answer:

A mutation that causes female pigs to have fewer offspring

Explanation:

In the farming industry, more product is better. If cows produced more milk, farmers would make more money.

If sheep produced more wool, the farmers would profit.

If there was an increased crop yield, the farmers would benefit.

However, fewer pigs means less money, so that is the only possible answer.

Answer:

D. Perimineralization

Explanation:

After a bone, wood fragment, or shell is buried in sediment, it may be exposed to mineral-rich water that moves through the sediment. This water will deposit minerals, typically silica, into empty spaces, producing a fossil.

Answer:

Canada I believe.

Explanation:

Cercopithecidae, which is related to apes and humans

Ape species include humans, gorillas, chimpanzees, orangutans, gibbons, and bonobos.

Explanation:

deoxyribose

it's a carbon based sugar molecule

Answer:

I think the answer is Necleotide

Answer:

The correct answer is B. Albedo Decreases.

Lower albedo = more energy absorbed = warmer temperatures.

Let  me know if this helps!

Answer:

Less Solar energy is reflected.

Explanation:

If those answers aren't up there

Answer:

tilt and orbit of the Earth combine in a way that the axis is inclined away from the sun

Explanation:

We have an equinox twice a year. The Spring and Fall equinox. An equinox occurs when the tilt of the Earth's axis and Earth's orbit around the sun combine in such a way that the axis is inclined away from the sun.

I think it's b because it seems obvious

Explanation:

The Answer Is

Hope It Helps U

Brainliest

Answer:

it will turn to ice

Explanation:

the potential energy in the molecules is reduced and they start to move alot slower, eventually they stick together and form ice

Answer:

by blocking cells in mitosis and staining the condensed chromosomes Giemsa dye.

Explanation:

Can't explain.

Answer:

im pretty sure that it does that through its roots.

Explanation:

Answer:

Language barriers,Employment opportunities

Housing,Access to local services,Transportation issues,Cultural differences,Raising children,Prejudice,Isolation,The weather

Answer: some of the challenges immigrants face in America are land and job, shortages, Cultural differences, Raising children. and many people come to the US. seeking freedom or relief.

Explanation:

hope this helps have a great day

Answer:

Like the nervous system, the endocrine system is a regulatory system. However, instead of using electrical impulses for signaling, it produces and uses chemical signals called hormones, which travel through the bloodstream and control the actions of cells and organs.

Explanation:

Hope it helps

Answer: I think it's true but I also think it is False

(I guess I would say False my friend)