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3 years ago

Help me please I don’t understand

Biology

1 answer:

Law Incorporation [45]3 years ago

8 0

Answer and explanation:

2. The specialized human cells in the image correspond to a white adipocyte - fat cell - and an erythrocyte or red blood cell.

How are these cells specialized?

White adipocyte contains a large amount of fat - within the globule - which occupies almost all of its cytoplasm, formed by triglycerides and cholesterol esters.
Red blood cell is not strictly speaking a cell, as it lacks a nucleus, but its circular shape allows it to travel easily in the circulatory system, as well as containing haemoglobin, a molecule that allows it its main function.

What is its function? 

The adipocyte is the cell that forms part of the fatty tissue, whose function is protective - insulating and cushioning - as well as being the body's energy reserve.
The red blood cell contains hemoglobin, a molecule that allows it to fix gases - oxygen and carbon dioxide - to be transported in the blood.

3. A boy's mass was measured from birth to his first birthday, and the graph shows that it remains at a low percentile, indicating a low mass (weight) for his age.

a. At 3 months of age, a baby's mass is at the 25th percentile, indicating - compared to other 3-month-old babies - that his mass is lower than most, which may be interpreted as a health problem or lack of adequate nutrition.

With respect to body mass, the 25th percentile represents that this measurable characteristic is low and rare.

b. Suggest how old the boy was when the doctor became concerned about his growth.

According to the chart, the doctor began to worry about the baby's growth from the age of 6 months, when the baby's body mass began to decrease, rather than increase.

In an infant, it is normal to see a progressive increase in height and weight with age, a marker of adequate growth, development and nutrition. The doctor is concerned that not only has the baby had a low mass from birth, but also that the mass begins to decrease after a certain age, maybe related to severe nutritional or physiological problems.

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Hope it helps!

4 0

2 years ago

What do earth scientists study?

RideAnS [48]

In some capacity, earth scientists study all of the above listed. They focus on ecology (how different organisms function within ecosystems), food chains, climates and weather patterns, aspects of the atmosphere, soil and the Earth's mineral components, farming, and how man's machines both help and hurt the environment.

5 0

2 years ago

In two or more complete sentences describe a long term effect of water erosion on humans, and discuss how this might be reduced

Ghella [55]

Answer:

Water erosion refers to the removal of the top most or surface layer of soil by the flow of water. The long term effect of water erosion can be because of drastic rain fall and may be because of flood. These two reasons can adversely effect the human life. The water erosion is responsible for the removal of fertile layer of soil, therefore, the region will not be appropriate to grow vegetation. The long term effect may result in stagnation of water, therefore, long time is required so that the region gets dried. The long term accumulation of water over an agricultural field can spoil the crop production.

Prevention that can be taken to reduce long term effect of water erosion:

1. Plantation of long root bearing trees over flood prone regions and around the agricultural field: This will allow the trees to tightly hold up soil and prevent it's erosion.

2. Add rocks over the soil: In an agricultural field or flood prone area, the rocks will act as barrier for the movement of run off water, hence, will prevent water erosion. It will increase the absorption of water by soil.

3. Building of walls: This will also act as a barrier in a flood prone region and will prevent the water being added up to the agricultural land.

4.Remove soil compaction: If the soil compaction of the effected region is removed, the water retention property of the soil can be improved. Machines, animals and humans can be used for this purpose to remove the compaction of upper layer of soil.

Explanation: hope this helps.

8 0

2 years ago

Read 2 more answers

Explain why a variety of instruments are needed to measure change in the climate system.

malfutka [58]

A Variety of instruments is needed to measure the change in the climate system because of B. The climate system involves several different factors that are measured differently

For example Wind and Temperature. Both of these factors will heavily affect the climate system but both these factors are so different and they need different instruments to be measured

7 0

1 year ago

Why does the male parent's genes determine the sex of the baby?

Julli [10]

Consider this:

Each parent has two sex chromosomes.
The mother, as a female, has chromosomes XX.
The father, a male, has XY.

The mother will pass on one sex chromosome to the baby, as will the father.
The mother can only pass on an X.
The father, however, has a 50/50 chance of passing on an X or Y.
XX would make a female and XY would make a male.

Simply put, the sex chromosome from your mother is fixed, it's going to be an X no matter what. It's which sex chromosome your father passes on that determines your sex.

7 0

2 years ago

Read 2 more answers