BIOLOGY HIGH SCHOOL

A _________ is the pathway along which energy is transferred from one organism to the next. When you connect all of the these together, they form a ________.trophic level, food chain
food web, food chain
food chain, food web

Answers

Answer 1
Answer: A trophic level is the pathway along which energy is transferred from one organism to the next. When you connect all of the these together, they form a food chain.

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Which property of water can dissolve sugar and salt but not oil A.PH
B.polarity
C.adhesion
D.cohesion

Answers

I think your answer is B

In neuronal communication, ________ involves moving a neurotransmitter from the synapse back into the axon terminal from which it was released.

Answers

Answer:

In neuronal communication, _reuptake_ involves moving a neurotransmitter from the synapse back into the axon terminal from which it was released

Reuptake is the reabsorption of a neurotransmitter by a neurotransmitter located along an axon terminal's plasma membrane (i.e., the pre-synaptic neuron at a synapse) or glial cell after performing its role of transmitting a neural impulse.

Squirrels gather as many nuts as possible and bury them to prepare for winter. What type of behavior is this?

Answers

Squirrels gathering as many nuts as possible and burying them to prepare for winter is a behavior called fixed action pattern. It is a series or sequence of acts that happens behaviorally in animals. This sequence is unchangeable. 

Answer:

fixed action pattern

Explanation:

How do adrenaline help in dealing with emergency situations

Answers

Adrenaline helps in emergency situation by providing energy so that the major muscles of the body can respond to the perceived threat.
In danger, the brain then sends nerve impulses to the adrenal gland in the kidneys. When the nerve signal reaches the adrenal gland, chromaffin cells, in the medulla of the adrenal gland, release epinephrine or adrenaline. It then enters the bloodstream. It is thus carried around the body to cells in various locations, where it initiates several responses.
1. Adrenaline, along with another hormone called glucagon, is responsible for the breakdown of glycogen in liver cells. Glycogen is a form of energy storage. This gives energy to the muscles
2. Adrenaline effects the skin also. Restriction of the arteries is caused by the binding of epinephrine/adrenaline to some alpha-adrenergic receptors. This cuts off blood supply to the skin. This results in the contraction of the smooth muscle cells in the skin, which cause the raising of the hairs on the surface of the skin. 
3. The lungs contain smooth muscle. Epinephrine causes smooth muscles to relax. Specifically, epinephrine binds to beta-2-adrenergic receptors on bronchiole muscle cells. This allows the bronchioles to relax, which enables intensified respiration.
4. Adrenaline binds to beta-adrenergic receptors on heart muscle cells. This causes the contraction rate of the heart to increase. This ultimately leads to increased blood supply to the tissues in the body.

The circulatory system of mammals has a ________ chambered heart.a. two
b. three
c. four
d. one

Answers

The circulatory system of mammals has a ________ chambered heart. c. four
of two chambered heart, but humans have four

A population of 100 butterflies living on an acre of land loses three-quarters of its members when a sudden freeze in the spring occurs just after they emerge as caterpillars. This population has undergone a reduction in population size due toA. a density-independent factor.
B. natural selection.
C. an intrinsic factor.
D. a density-dependent factor.

Answers

Answer: Option A (Density-independent factor)

Explanation:

Density-independent factor is a population regulation factor that affect or influence the size of a population without considering the population density. Climate and weather are the main density-independent factors in nature.

Their effects increment is directly proportional to the increase in population size. These factors are environmental agents that checkmate the size of a population without putting the reproductive and behavioral patterns of the organisms into consideration.

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