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taurus [48]
3 years ago
12

Bottleneck events are always caused by the death of most of a species’ population. true or false

Biology
2 answers:
Schach [20]3 years ago
5 0
The answer to your question is false
Phoenix [80]3 years ago
4 0
Your answer is true hope this helps
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When plants are stressed by dry conditions, they secrete the hormone abscisic acid (ABA) and in response the stomata close, even
dimaraw [331]

Answer:

C. K+ ions flow out the the guard cells and water flows out the cells.

Explanation:

The turgidity of the guard cells allows the opening and closing of the stomata. This is especially necessary when it comes to water conservation in plants. In order for the cells to become turgid or flaccid, there must be the influx and out ward movement of water via osmosis.

In order for this the occur the osmotic pressure of the cellular environment must change and this is done by changing the solute concentration.

The pumping in of K+ ions out the cell allows the solute concentration to decrease and this in turn encourages the movement of water across a concentration gradient through a semi-permiable membrane.

The water leaves the guard cells and they become flaccid. This causes the stomata to be covered.

4 0
3 years ago
Read 2 more answers
Which causes the biodiversity of rainforests?
sashaice [31]

Answer:

B. Stable ecosystems

Explanation:

The main cause of the biodiversity experienced in rain forests is largely due to the stable ecosystems that they enjoy.

A stable ecosystem is a sustainable one that does not change too much over the course of time.

Most organisms and the diverse life forms are easily nourished by the provisions made available by nature in such regions.

  • Most rain forest receives a large amount of solar radiation and energy all year round as the sun is directly overhead here.
  • This suggests that the producers have enough energy to cater for their own need and that of the organisms there in.
  • The consumers and decomposers have sufficient food available all year round.
  • This coupled with other factors whereby organisms have specially adapted to environmental conditions makes a rain forest very biodiverse with life forms.
  • An unstable ecosystem cannot be biodiverse  
8 0
3 years ago
Read 2 more answers
PLZ HELP I AM TAKING A QUIZ!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Taya2010 [7]

Answer:

QUESTION:

Are involuntary muscles

A) cardiac

B) smooth

C) skeletal

ANSWER:

muscle governing reflex functions and not under direct voluntary control especially: smooth muscle.

Explanation:

Hope that this helps you out! :)        

If you have any questions please put them in the comment section below this answer.        

Have a great rest of your day/night!        

Please thank me on my profile if this answer has helped you.

3 0
3 years ago
In the 1950s, what discovery revolutionized biotechnology?
svetlana [45]
Answer: c. molecular structure of DNA
6 0
3 years ago
Where does the calvin cycle occur? there is a scheme of chloroplast structure. the outer layer of the chloroplast is labeled
Mashcka [7]
The Calvin cycle take place in the Stroma of the chloroplast. Calvin cycle is  a set of chemical reactions that take place in the chloroplasts during photosynthesis. This cycle is light-independent since it takes place after the energy has been captured from sunlight. The process; involves four main steps; carbon fixation, reduction phase, carbohydrate formation, and regeneration phase. 
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