Biology, 27.03.2020 18:17 dondre54

Help me please I don’t understand

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Answer from: AutumnJoy12

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.

Answer from: Quest

the principle of segregation describes how pairs of gene variants are separated into reproductive cells. from his data, mendel formulated the principle of segregation. we now know that the segregation of genes occurs during meiosis in eukaryotes, which is a process that produces reproductive cells called gametes.

Answer from: Quest

the right option is; decreased genetic variation

decreased genetic variation describes the effect of this environmental change.

genetic variation is the naturally occurring genetic diversities or differences between organisms of the same species in a population. genetic variation allows the survival and adaptability of a species when they encounter changing environmental conditions. when an endangered species reduces, it loses genetic variation which may not be restored even if the species rebound and will only be recovered through the gradual collection of mutations over many years.