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Harman [31]
2 years ago
13

What is a ionic bond.

Biology
2 answers:
valkas [14]2 years ago
7 0

Answer:

D

Explanation:

Brrunno [24]2 years ago
3 0
The answer is D, A bond in which electrons are transferred.
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What is one of the principal chemical compounds that living things use to store energy
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Answer:

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Explanation:

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The part labelled A is the upper epidermis . The main function of the epidermis is to protect the structure of the leaf.

The part labelled B is palisade tissues. These are the sites where the chlorophyll are present.

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The part labelled D are the vascular tissues which transport water and food.

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Answer No 21)

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B cells mature in the bone marrow, which is at the core of most bones It recognises invaders by the shape of molecules -antigens- on their surfaces. With the help of T cells, B cells make proteins called antibodies. The antibodies will help your body become aware of intruders.
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