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olchik [2.2K]
3 years ago
5

The ______________ is a semipermeable membrane that forms a boundary between the cell and the external environment. 1 Point

Biology
1 answer:
Arisa [49]3 years ago
4 0
The answer you are looking for is D, the cell membrane! 

Not sure how to explain it, it's biology, mostly memorization. 
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_______ can produce their own energy.
STALIN [3.7K]
A) Autotrophs because heterotrophs don't make their own food and rely on other organisms while autotrophs are organisms such as plants who use photosynthesis to make their own food.
8 0
4 years ago
How many covalent bonds can carbon make?
Ostrovityanka [42]

Answer:

4

Explanation:

Carbon has four valence electrons, so it can achieve a full outer energy level by forming four covalent bonds. When it bonds only with hydrogen, it forms compounds called hydrocarbons. Carbon can form single, double, or triple covalent bonds with other carbon atoms.

4 0
3 years ago
Read 2 more answers
Please help! whoever answers this first and explains why the answer they chose is right I will mark brainliest!!
mojhsa [17]

Answer:

Competition

Explanation:

I chose this answer because the question asked when multiple organisms seek the same resources, they are competing for the resources.

Hope this helped

:)

8 0
3 years ago
Read 2 more answers
What type of dominance is a blending of the two alleles to make a phenotype somewhere between the parent’s phenotypes? a incompl
jekas [21]

Answer:

A. Incomplete dominance.

Explanation:

Incomplete dominance is the ability of two alleles to produce a heterozygous phenotype different from the two homozygous phenotypes.

Example is when a pure stock of red flowered (RR) four o'clock plant is been crossed with a white flowered(rr) one, the offspring are all pink flowered(Rr), showing a blending of flower colour character. Self pollination of the pink flowered F1 individual produce a mixture of F2 individual bearing red, pink and white flowers in the ratio of 1:2:1. This reappearance of the red flowered and white flowered forms in the F2 generation shows that alleles R and r have remained unaltered in the F1 generation.

4 0
4 years ago
Describe why it is said that all life depends on autotrophs/producers.
Rainbow [258]
<span>because they are the ones able to harness free energy such as the sun and store it in sugars and other biological chemicals such as fats and proteins. other creature like us eat them to gain our energy so without them we would all starve</span>
4 0
3 years ago
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