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lesya [120]
2 years ago
15

How are the molecules of the plasma membrane arranged?

Biology
1 answer:
devlian [24]2 years ago
8 0

Answer:

They  are arranged in two layers called a phospholipid bilayer; with a hydrophobic, interior and a hydrophilic, exterior.

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How do natural disasters affect the process of natural selection?<br> 15 points!
AURORKA [14]
It decreases the population of certain animals
7 0
3 years ago
Chrysanthemums are short-day plants that normally flower in late fall. Suppose you were a chrysanthemum grower and you would lik
Whitepunk [10]

Answer:

Option D

Explanation:

Options for the question

A)import seeds produced in the southern hemisphere.

B)plant the flowers out-of doors in november.

C)keep the plants in a warm growing environment.

D)expose the plants to an hour of light in the middle of each night until the end of april.

Solution

Since Chrysanthemum is a short-day plant, its flower mainly develop during night and hence they require long nights of 11 to 12 hours. Blackout system is sometimes used to induce flowering.Flowering can be delayed by regulating both light and temperature. this is done by exposing plants for a short period of time to light (can be artificial) and to some source of heat that produces 85° F or higher temperature.  

Thus if flowers are required in month of may, flowering can be delayed by exposing Chrysanthemums plant to light and heat source during night time

Option D is correct

6 0
3 years ago
What will happen if external factors affect cell division in a group of cells placed in a culture dish? A) Anchorage dependence
irakobra [83]

Answer:

option B is correct

Explanation:

the effect of external physical factor on cell division is clearly seen on in density dependent inhibition( a phenomenon in which crowded cell  stop dividing)

6 0
3 years ago
Which is a closed system.a tree, a human ,a clock , or a car
melomori [17]
A closed system is a system that makes no physical or chemical exchanges with its environment. Of these systems provided as choices (tree, human, clock, car), only a clock does not make exchanges with the environment, except for energy.
Therefore, of that list, only a clock would be a closed system.
Hope that helped! =)
4 0
3 years ago
How do people know when they have been bitten by the vector that causes African
IceJOKER [234]

Answer:

Explanation:

African trypanosomiasis is a parasitic disease transmitted by the tsetse fly. It gets its nickname 'sleeping sickness' because symptoms can include a disturbed sleep pattern.

5 0
3 years ago
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