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soldier1979 [14.2K]
3 years ago
5

Fleas are commonly seen on the bodies of dogs. These fleas attach themselves to the host and draw blood as nourishment. Apart fr

om getting nourishment, fleas also get free shelter and a mode of transport. What kind of an interaction does this exhibit?. A.Parasitism. B.Competition. C.Predation
Biology
1 answer:
Slav-nsk [51]3 years ago
8 0
I believe the correct answer among the choices listed above is option A. Parasitism is the kind of interaction that is shown here. Parasitism is a kind of relationship where one feed off the other. Fleas here are referred to as the parasite and the dog is the host.
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Which part of the Pakicetus anatomy most suggests that it is an ancestor of whales?
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Answer:

Pakicetus had an ear bone with a characteristic specific to whales and a distinctive long skull shape of a whale's.

Pakicetus

• Pakicetus was a wolf-sized animal and was a carnivore that at certain occasions consumed fish had exhibited features of its anatomy that associated it to the modern cetaceans, porpoises, whales, and dolphins.

• It had the body of a land animal, however, its head exhibited the distinctive long skull similar to a whale.

• With time, the fossils also showed that Pakicetus possessed an ear bone with a characteristic specific to whales.

Thus, pakicetus can be considered as the first whale who exhibited certain similar anatomic features like that of a whale.

Find out more information about Pakicetus anatomy here:

brainly.com/question/16395727

Explanation:

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2 years ago
Excitatory neurotransmitters influence the receiving neuron to _____, whereas inhibitory neurotransmitters influence the receivi
Viktor [21]

Excitatory neurotransmitters cause the neuron to fire, and Inhibitory neurotransmitters cause the neuron not to fire.

Impulses are the signals passed from one neuron to another on the action of a stimulus. The impulses passed can be electrical or chemical. Neurotransmitters are the chemical molecules that help in the transfer of impulses between two neurons.

Chemicals like epinephrine, norepinephrine, and glutamate when released from the synaptic cleft of one neuron activate the receptors of other neurons, thereby initiating the other neuron to fire. These chemicals are called excitatory neurotransmitters.

Chemicals like GABA and glycine, when released from the synaptic cleft of one neuron do not activate the receptors of other neurons and hence the neurons will not fire the impulse. These chemicals are called inhibitory neurotransmitters.

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8 0
1 year ago
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Dima020 [189]
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2 years ago
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Which human body systems interact to perform temperature regulation along with the nervous and endocrine systems?
Ede4ka [16]

Answer:

Hypothalamus of human body system interact to perform temperature regulation along with nervous system and endocrine system.

Explanation:

Hypothamus is an important part of our lower brain that play a significant role in regulation of body temperature.

   Hypothalamus works with nervous system along with the other parts of our body such as blood vessels,skin and sweat gland to maintain temperature homeostasis of human body.

  When our body temperature rises at that time hypothalamus slows down the rate of metabolism of our body to restrict further increase in our body temperature and also dilates the blood vessels present beneath the skin so that body can liberate heat to the environment.

 on the other hand when the body temperature decreases at that time hypothalamus increases the metabolic rate of our body to increase the body temperature and also the constrict the blood vessels present under the skin.

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2 years ago
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