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Daniel [21]
3 years ago
14

What is cell membrane

Biology
2 answers:
sdas [7]3 years ago
8 0

Answer: Cell membrane is layer which is present in all living cells. It is present under the cell wall but in some cases such as plant cells.

Explanation: It is composed of lipid bilayer and proteins embedded in it. Phospholipids, glycolipids and sterols is the composition. Its function is to protect the cell from extracellular environment. It is semipermeable membrane that js allow only selected molecules to pass.

liubo4ka [24]3 years ago
4 0

Answer: A cell membrane is a phospholipid bilayer that defines the external boundaries of cells and regulate the molecular traffic across the boundary.

Explanation: Cell membranes are flexible, self-sealing and selectively permeable bilayer of phospholipids with proteins embedded in the bilayer through hydrophobic interactions. Cell membranes are formed by the interactions of the hydrophobic tails of the phospholipids, the hydrophobic tails of the phospholipids face each other while their polar head groups face outward, thus forming a bilayer with a fluid hydrophobic core. The selective permeability of membranes makes them to retain certain compounds and ions within cells while excluding others. Cell membranes include an array of proteins specialized for promoting or catalyzing various cellular processes such as synthesis of lipids and certain proteins and the energy transductions in mitochondria and chloroplasts.

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An annual mustard plant survives only one month during which it produces 50 flowers. each flower produces a fruit containing 20
V125BC [204]

Answer:

Replacement rate

Explanation:

In biology, replacement level or replacement rate refers to the amount number of offspring required to be produced to keep the level of population at a stable state without causing it to much decease.

Scientists use the replacement rate of plant and animal specie to assess the rate at which the population is reproducing at a stable level or are at some threshold zone and need to be taken care of.

Here in question, we see that some specific properties of mustard plants are focused that, plant survives only one month during which it produces 50 flowers. each flower produces a fruit containing 20 seeds.

It clearly do not depicts the population size of mustard plant, or niche or fitness, it just describe the replacement rate that how many offspring does mustard plant produce to keep its population at a stable or steady state without being getting into a danger of extinction.

Hope it help!

6 0
3 years ago
Globulin is a protein. Which of the following organelles will assist in the synthesis of globulin
Vitek1552 [10]
Rough endoplasmic reticulum or RER for short. 

Hope I helped

:)

Have a great day and happy learning
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Leokris [45]
I believe the answer is a earthworm
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2 years ago
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The allele for a widow’s peak has complete dominance over the allele for a straight hairline (w). What is the probability of a m
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dem82 [27]
That is anaphase i think  


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