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3 years ago

How is the size of the pupil regulated

Biology

2 answers:

Natasha_Volkova [10]3 years ago

7 0

The amount of light reuglates the size of ones pupil

Luden [163]3 years ago

3 0

The pupil is located in the center of the iris. To be more exact, it is a hole located in the center of the iris. Its primary job is to regulate how much (or how little) light enters the eyes. This is done through muscles in the iris, which will constrict or enlarge the pupil. Nerve impulses travel down the optic nerve after light enters the eye, which affects the size of the pupil. The pupil changes involuntarily. It is known as the pupil reflex.

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Why should we be concerned about climate change?

Ne4ueva [31]

Because rising temperatures would cause

Droughts
Heat waves
More forest fires
Melting Ice caps
Floods
and more severe storms.

8 0

3 years ago

1. Why do scientists use the scientific method?

Xelga [282]

1. Answer: to answer questions about the natural world

The aim of scientific method is to answer a question that the scientist have. To answer the question, the scientist need to design a research or observation. If the research is flawed, the result might not match with the scientist aim and the conclusion will be wrong. Scientific method can be used to help design the research so it will have less flaw

2. Answer: fertilizer

The student wants to determine the effect of a certain brand of liquid fertilizer on the growth of ivy. The fertilizer are hoped to influence the growth of the ivy. Independent variable is the variable that hoped to influence the dependent variable. So, the independent variable would be fertilizer and the dependent variable would be the growth.

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3 years ago

Bacterial conjugation

lord [1]

Answer:

Yes, these are correct.

Explanation:

Bacterial conjugation is the bacterial counterpart of sexual reproduction. Also known as horizontal gene transfer, it involves the transfer of genetic material from one F+ or Hfr bacterium to another F+ or F- bacterium.
The F or fertility factor is a crucial component of the bacterial plasmid and it accounts for the development of sex pili which are important for conjugation. An F+ cells contains the F-factor incorporated into its plasmid, whereas an F- cell lacks the F-factor and therefore cannot participate in conjugation.
Conjugation between an F+ and F- cell can result in the transfer of the F-factor to the F- bacterium.
An Hfr bacterium contains F-factor incorporated into its circular genome.

8 0

3 years ago

Over the decades local and global ice ages have lowered sea levels. As a result, there is often a decline in marine diversity du

Annette [7]

Answer:

B) Changes in the temperature and salinity of water.

Explanation:

Options:

A) Migration of bottom feeders into the region.

B) Changes in the temperature and salinity of water.

C) Migration of fresh water fish to places near the mouths of rivers.

D) Formation of breeding grounds for various species in the shallow waters.

Sea level changes are among the most relevant issues that our planet is facing due to climate change. This phenomenon impacts the salinity and temperature of the ocean because of the melting of glaciers, and ice sheets. Therefore, melting ice alters the level of salinity of the water which, along with temperature, also effect the density of the ocean water, altering ocean currents and productivity. These impacts alter the distribution, behavior, and ecology of marine organisms.

*Note: The melting of the glaciers and ice sheets - result of anthropogenic climate change - has increased sea level.

3 0

3 years ago

Describe how caffeine can affect your stress level.

Gala2k [10]

Answer:

Caffeine is used often to wake you up, making you more alert. This can lead to anxiety or paranoia

Explanation:

The effects Caffeine has on your body can be those of a traumatic event. It stimulates your fight or flight response.

Hope this helped:)

3 0

4 years ago