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Marina86 [1]
3 years ago
6

A vein in a leaf has what important function?

Biology
1 answer:
ludmilkaskok [199]3 years ago
5 0

Answer:

b

Explanation:

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There are more protons than electrons in a negatively charged atom.
meriva

Answer:

False.

Explanation:

Protons are positively charged, so having more protons would make an atom positively charged. Electrons are negatively charged.

3 0
3 years ago
Please help I really need help on this question!!!
Mkey [24]

Answer:

Conduction

Explanation:

convection- not related, as it is hot air rising and cold air falling, which isn't happening.

Subduction- that has to do with the Earth's plates moving

Radiation- doesn't have to do with heated substances.

5 0
2 years ago
Question 10
stich3 [128]

Answer:

<h2>Its true!!</h2>

Explanation:

Actually the haemoglobin molecule consists of 2 parts, the haem which is a prosthetic group and the other globin which is a protein. So the haemoglobin as is a protein so, is arranged in quaternary structure of protein which contains 4 subunits. The subunits depend upon the organism whose haemoglobin is being talked about. So the normal haemoglobin found in red blood cells contains 2 alpha subunits + 2 beta subunits. At the centre of each subunit there is the haem part attached. To the centre of haem the Fe3+ ion are present which actually attaches to 1 Oxygen molecule. So as 4 subunits are present and each subunit has 1 Fe3+ ion, so total 4 Oxygen molecules can bind to the 1 Hb molecule!!

4 0
3 years ago
Babies with very low or very high birth weight are less likely to survive. Observe the graph of the data.
pshichka [43]

the answer is B ik this because i ahd this in a quick quiz

3 0
3 years ago
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Other than food and oxygen what do marine plants provide for other marine organisms
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They provide an important habitat!

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3 years ago
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