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mariarad [96]
3 years ago
14

What are covalent bonds???

Biology
2 answers:
iris [78.8K]3 years ago
7 0
A covalent bond is a chemical bond which involves the sharing of atoms.
tester [92]3 years ago
4 0
A chemical bond that involves the sharing of electron pairs between atoms.
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What is the blind spot of the retina?
MaRussiya [10]

Answer:

The region of retina devoid of photoreceptor cells (rod cells and cone cells)

Explanation:

The retina is the layer of the eyeball and is packed with rod cells and cone cells responsible for night and day vision respectively. The blind spot is the region in the retina where no rod cells and cone cells are present.

Absence of these photoreceptor cells ensures that no vision is formed in this part of the retina. However, the blind spot serves as the site from where the optic nerve passes through the retina and serves to transmit the impulse to the brain.

4 0
3 years ago
11. Describe the expedition that took place at Cheve Cave as described in
svp [43]

Answer: Expedition took place to extend the cave beyond its initial limit of exploration

Explanation:

6 0
3 years ago
Imagine a scenario in which a negatively charged ion, Ion A-, is more concentrated on the outside of the cell membrane, yet is a
Greeley [361]

Answer:

VDF= Vm- Veq.

Where VDF = Electrochemicall driving force

Vm=Membrane potential

Veq.=Equilibrium potential for the ion of interest

Ideally when VDF=0 at Electrochemical equilibrium, i.e.  Vm=Veq, there is no net movement of ions across the membrane.

So, Answer is (D) This scenario is impossible.

4 0
3 years ago
Read 2 more answers
which of the following best explains why top predators can have up to 60 times as much of persistent organic pollutants as their
lesya692 [45]

This is because persistent organic pollutants accumulate in the body fat of living organisms and increase in concentration as they move up the food chain.

<h3>What is Persistent organic pollutants?</h3>

These are organic compounds that are stable and do not degrade easily. They are usually harmful and accumulate in the body fat of organisms.

They are also known to  increase in concentration as they move up the food chain which is why predators have more of them.

Read more about Pollutants here brainly.com/question/24704410

6 0
2 years ago
The tundra is cold year-round. it has short cool summers and long, severe winters. The tundra has a permanently frozen sublayer
harkovskaia [24]
I’m pretty sure it is B. Please double check answers tho. It’s been a while since I learned adaptations. Also, if u go to my profile, it says I am 43. I am not a 43 year old middle schooler lol
4 0
4 years ago
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