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Alex787 [66]
3 years ago
7

What would happen if a sex cell could not complete DNA replication?

Biology
1 answer:
Mumz [18]3 years ago
4 0

Because meiosis creates cells that are destined to become gametes (or reproductive cells), this reduction in chromosome number is critical — without it, the union of two gametes during fertilization would result in offspring with twice the normal number of chromosomes!

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According to the ideas of Thomas malhus what are the predicted changes to the human population after 2050
tankabanditka [31]

Answer:

The correct option is 'C' that is eventually the population stop increasing or would decreases due to lack of food and living space.

Explanation:

In 1798, he wrote an essay on Principle of population where he described that how the population will grow with economy.

He claimed that the population will grow until the food supply decreases and then the population will stop growing due to lack of food and space and those individuals that can fight against this condition and and could attain food, space and other essential necessities will survive.

7 0
3 years ago
What term describes the rising and sinking of the lithosphere as material is added or removed?
Margaret [11]
<span>Composition. (We use the crust-mantle-core terminology to describe differences in chemical composition in Earth's interior. We use the lithosphere- asthenosphere terminology to describe differences the physical state and behavior. Note that the boundaries between layers with different compositions do not occur at the same depths as the boundaries between layers with different physical properties. For example, there is a change in composition when passing from crust into mantle. But there is no change in physical state or behavior at this boundary- the uppermost part of the mantle behaves in the same way that the crust does because it is still far enough below its melting temperature to be a rigid, brittle solid. The transition to a softer, more pliable solid occurs further down within the mantle and this change in behavior occurs with no change in composition.)</span>
3 0
3 years ago
Which of the following is not a source of atmospheric carbon?
garik1379 [7]

Answer:

fossil fuel doesnt need atmospheric carbon for burning

5 0
3 years ago
This type of membrane transport moves substances against the concentration gradient from an area of low concentration to an area
sashaice [31]

<u>Answer</u>:- Active transport

<u>Explanation</u>:-

There are two types of membrane transports

1. Passive transport - this type of transport occurs without the input of any energy and the molecules move along the concentration gradients that is from <em>high concetration to low concentration.</em>

2. Active transport- this type of transport takes place to move the molecules against the concentration gradient that is from <em>low concentration to high concentration.</em>

<em>The active transport is of two types:</em>

1. <em>Primary active transport-</em> in this type of transport <em>ATP</em> is used as an energy source to move the substances against the concentration gradient.

2.<em>Secondary active transport</em> - in this type of transport the gradient formed by the active transport is utilized and it involves the movement of 2 substances at a time aross the membrane. That is the movement of one molecule is coupled to another.


  • The membrane proteins that are associated with active transport are called as <em>carrier proteins</em>. These proteins have a binding site for the molecules that they transport. Once they bind to the specific molecules, a conformation change is induced and this leads to the transport of the molecule across the membrane.

So, the <em>active transport is basically responsible for utilizing the energy from ATP and carrier proteins to move the substances across the membrane against their concentration gradient i.e. from low concentration to high concentration.</em>

5 0
3 years ago
Which of these is a solution? <br> a. oil and water <br> b. soda pop <br> c. h2o
sertanlavr [38]
B.) Soda pop is the solution among them........
8 0
3 years ago
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