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Alla [95]
3 years ago
5

Which of the following scenarios is representative of parasitism?

Biology
2 answers:
Pani-rosa [81]3 years ago
5 0
I believe the correct answer from the choices listed above is option A. Tapeworms living in a mammal’s intestinal tract is the <span>scenario that is representative of parasitism. The tapeworms are the parasites and the mammal is the host. Hope this answers the question.</span>
sergij07 [2.7K]3 years ago
3 0
A, definitely A. The A example, only the tapeworm gains something, the mammal doesn't gain anything whilst in the other examples, both the organisms gain something, for example in B the remora can remove parasites which is good for the fish and provide the remora with food.
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You are in the forest and see a large, snarling, drooling grizzly bear running directly toward you. The adrenaline rush you feel
elixir [45]

You are in the forest and see a large, snarling, drooling grizzly bear running directly toward you. The adrenaline rush you feel as you run toward the cabin is controlled by the sympathetic nervous system.

The sympathetic nervous system is a part of the autonomic nervous system which functions through various interconnected neurons. The sympathetic nervous system’s main role is to stimulate the neuronal and hormonal stress response (also known as body's fight-or-flight response). The sympathetic fibers in the adrenal medulla (inner part of the adrenal gland) produce acetylcholine (a neurotransmitter), which allow the high secretion of adrenaline and low amounts of noradrenaline from it. The sympathetic nervous system also prepares the body for action, especially in situations that are dangerous to survival.




7 0
3 years ago
Forests are logged to produce lumber, paper and other products derived from trees. Which of these may be an effect of clear-cutt
Tcecarenko [31]
<span>C. a severe degrading of watersheds which leads to increased soil erosion and a decrease in the
quality of drinking water</span>
5 0
2 years ago
Without the presence of sea otters, sea urchins would otherwise overgraze kelp beds, dramatically changing the marine community
densk [106]
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6 0
3 years ago
Read 2 more answers
A 154-lb adult man performs a moderate level of physical activity and regularly consumes 2700 Calories a day. State whether the
Arte-miy333 [17]

Answer:

The correct answer would be - remain the same.

Explanation:

In the given table showing the average daily calories requirement according to the weight of the adult men. Which is as follows:

weight                daily intake

132                        2250

154                        2450

176                        2650

198                        2850

220                       3050

242                       3250

In this, the highlight weight and required calories should be taken by the man who does not perform any physical exercise but according to the question a man with 154 lb perform a moderate exercise, and according to the CDC a 154 lb men can burn anywhere between 140 and 295 calories in 30 minutes by moderate exercise for an hour.

Thus, the total calories he takes: 2700

burn by exercise: 295

should take: 2450

then = 2700 - (2450+295)

= 50 calories over the limit that will have negligible effect on the weight.

6 0
3 years ago
A woman who is a carrier for hemophilia marries a hemophiliac man. What will be their children’s possible phenotypes?
Morgarella [4.7K]

Answer:

Hemophilia is a sex-linked recessive disorder in which a person's blood do not clots and he can bleed to death even after minor injuries because blood will keep running due to a small cut.

It is a recessive trait which means that even if one normal gene is present along with Hemophiliac gene, the person will not have the disease and he will be the carrier.

Question: What will be their children’s possible phenotypes?

If a woman who is a carrier for hemophilia marries a hemophiliac man, their genotypes can be denotes as :

Here H, indicate normal gene and small h indicate defected (hemophilia) gene.

Parents:                      XHXh                   X           XhY

Offspring:                   XHXh : XHY:  XhXh:  XhY

Phenotype of offspring:

XHXh:  The child will be daughter and normal (25 % chances)

XHY:     The child will be son and normal (25 % chances)

XhXh:   The child will be girl and Hemophiliac (25 % chances)

XhY:      The child will be son and Hemophiliac (25 % chances)

Hope it helps!

5 0
2 years ago
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