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Furkat [3]
3 years ago
15

Phospholipids are arranged to form the plasma membrane so that

Biology
1 answer:
natta225 [31]3 years ago
8 0

Ans.

Plasma membrane is an outer covering of cells, made up of lipid bilayer and protein molecules.

The lipids present in plasma membrane show amphipathic nature as their head groups are hydrophilic, while inner tail groups are hydrophobic in nature.  

The hydrophilic heads face the extracellular fluid and intracellular fluid, while the hydrophobic tails point inward, to provide a double layer structure.

A bilayer arrangement of lipid molecules is shown in attached figure.

Thus, the correct answer is option). A.

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13

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What kind of atom tends to lose one electron?
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An atom with a single electron in its outermostshell

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List 2 adaptations that helped Darwin's finches survive.?
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Answer:

Two adaptations of Darwin's Finches that helped them to survive are:

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These Finches occupied different niche in the Galapagos island  and were widely studied by Darwin.

These finches are one of the best Examples of Adaptive radiation.

Studies state that during severe drought in Galapagos island most vegetation dried out and a few softer seeds were left.

These few seeds were quickly fed upon by the birds and only dry , hard seeds were left.

Only birds who had large and hard beaks could feed on these hard dry seeds.

To Ensure survival the Finches developed adaptations which resulted in hard and large beaks so that they can feed on those dried hard seed.

Some groups started feeding on insects and got their beaks adapted to capture and kill insects.

Second line of adaptation included changes in behaviour and cognitive intelligence where birds started using tools for foraging.

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