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sammy [17]
3 years ago
10

Malcolm is studying alone in his room late at night when he hears a loud noise downstairs. His heartbeat increases significantly

and his breathing becomes shallow. He wonders if a burglar has entered the house and decides to investigate. Which division of his nervous system was activated?
Biology
1 answer:
olga_2 [115]3 years ago
5 0

Answer:

Sympathetic nervous system

Explanation:

The sympathetic nervous system stimulates the fight-or-flight system which induces secretion of epinephrine and norepinephrine. This lead to an increase in heartbeat and shallow breathing.

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Amphibians moved to a terrestrial environment; however, they did not evolve the ability to live their entire lives on land. Expl
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Answer:

See the answer below

Explanation:

<em>Amphibians are not totally adapted to live on land because the aquatic environment is needed for several life processes such as </em><em>reproduction</em><em>, </em><em>respiration</em><em>, and sometimes, </em><em>feeding</em><em>.</em>

<u>The eggs of amphibians are without any protective shells and will suffer desiccation in the terrestrial environment. Hence, water is needed in order to protect the eggs. In addition, the male am</u>phibians shed their sperm in the water close to the female eggs.

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3 0
3 years ago
3. Give two examples of seed plants that have flagellated sperm.
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Answer:

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Darwin’s theory of evolutions unifies all of __________.
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In man, two abnormal conditions, cataracts (C) in the eyes and excessive fragility (F) in the bones, seem to depend on separate
juin [17]

Complete question:

In man, two abnormal conditions, cataracts (C) in the eyes and excessive fragility (F) in the bones, seem to depend on separate dominant genes located on different chromosomes.  Normal vision and normal bones are recessive traits.  A man with cataracts and normal bones, whose father had normal eyes, married a woman free from cataracts but with fragile bones.  Her father had normal bones.  

1. What is the genotype of the man with cataracts and normal bones?

2. What is the genotype of the woman with normal vision and fragile bones?

3. What type of offspring might this couple expect?

Answer:

  1. Cc ff
  2. cc Ff  
  3. F1)  4/16 = 1/2 = 25% CcFf, cataracts and fragile bones

              4/16 = 1/2 = 25% Ccff, cataracts and normal bones

              4/16 = 1/2 = 25% ccFf, normal eyes and fragile bones

              4/16 = 1/2 = 25% ccff normal eyes, normal bones

Explanation:

Due to technical problems, you will find the complete answer and explanation in the attached files

Download pdf
3 0
3 years ago
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