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lukranit [14]
3 years ago
13

An emergency reaction when dealing with a threat often includes sympathetic nervous system arousal and the mobilization of one's

energy. this is best illustrated by
Biology
1 answer:
Vladimir79 [104]3 years ago
3 0

An emergency reaction when dealing with a threat often includes sympathetic nervous system arousal and the mobilization of one's energy. this is best illustrated by - the fight or flight response.

A fight or flight response, also called hyper arousal is a physiological reaction which occurs in response to a perceived harmful event, attack, or threat to survival.

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Note that the lac enzyme continues to be produced even in the absence of lactose. Why is this a problem? Try dragging the lac op
aniked [119]

Answer:

If the lac enzyme continues to be produced even in the absence of lactose, the cell will be expending energy unnecessarily and this will be a problem for the supply of energy for other metabolic processes.

If the lac operator gene is dragged to any stretch of DNA, that gene may provide an inadequate reading generating a mutation.

Explanation:

The lac operon is an essential molecule for the transport and metabolism of lactose in microorganisms. This molecule has a fundamental function in the life of these single-celled organisms and must be synthesized immediately when lactose is present in the organism, however, its synthesis must be stopped as soon as the lactose is metabolized, otherwise the cell can spend energy unnecessarily preventing others Metabolic processes take place, which is a big problem if you only have one cell.

In addition, if for some reason, the lac operon gene is dragged on the DNA strand, an incorrect reading of the DNA bases can occur, which can cause mutations.

4 0
3 years ago
Stromatolites are rocky structures that generally form in shallow waters from the binding of sediment by microbial biofilms. Str
hjlf

<u>Answer:</u>

Approximately, the oldest stromatolites are 3.6 billion years old on earth.

<u>Explanation:</u>

  • Stromatolites is not only oldest earths fossil but conspiracy in that they are singular visual portal in deep time on earth.
  • It is defined as laminated accumulation structure that is they stick up above sea floor .
  • Stromatolite buildings includes oldest fossils which are 3.5 billions old when the earth were too unfriendly to support life.
  • The study of  fossil age, evolutionary, method of formation are known as paleontology.
  • These specimens are considered as old fossils which are around 3.4 to 4.1 billions years old.
7 0
2 years ago
What purpose does a female pine cone serve?
Neporo4naja [7]

The answer is A It protects the seed until it matures.

hope this helps

7 0
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