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Effectus [21]
4 years ago
14

The heart begins to beat during the ________ period of prenatal development.

Biology
1 answer:
gladu [14]4 years ago
5 0

Answer:

stage

Explanation:

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The most important agent of chemical weathering is _____. nitrogen oxide sulfur carbonic acid water
NeTakaya

The three important agents which are involved in chemical weathering are –water,, carbon dioxide and oxygen. Among the three most important chemical weathering agent is water. With a simple formula H2O, the two hydrogen atoms bonded to one oxygen atom.  This structure of water gives it a polar molecule property due to which it can polarize itself into negative and positive poles. The hydrogen is the positive pole with (+1) charge while the oxygen is the negative pole with (-2) charge and they attract ions opposite to their charge numbers.This exerts a molecular force on the surrounding molecules and they dissociate to get polarized and form new molecule. This process is called hydrolysis where a mineral is dissolved in water and ions from the minerals are carried away. These elements undergo the process of leaching.


7 0
3 years ago
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A botanist is studying the effects of different oomycete species on potato plants. She exposes one set of plants to an oomycete
svlad2 [7]

Answer:

Mortality will be higher in plants exposed to the oomycete species having several AVR proteins.

Explanation:

The higher the virulence of a viral cell. the higher the number of organisms that that will be infected due to the virulence effect of the virus, and thus the higher the rate of mortality from the death due to the infection.Thus Virulence is directly proportional to mortality of the host due to infection induced by its effects.

Therefore higher virulence oomycete (AVR) protein will cause more mortality compare to  lower  virulence oomycete AVR protein, because it cause several  infections in the host than  the single  cell AVR protein. Besides,despite both protein of the same species; it  shows that it  is  the amount  of virulence that determine the rate of mortality.

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3 years ago
What formed element in the blood is responsible for attacking pathogens?
mixer [17]
<span>haemoglobin. hope this helps!
</span>
4 0
4 years ago
2.
serg [7]
Your answer maybe be c) chromatids
3 0
3 years ago
3 things plants need.
adelina 88 [10]
Plants need sunlight,water, and good soil.
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