Answer:
Although people living in low latitudes have high levels of eumelanin, this pigment can be found in people around the world (because it is predominant in people with brunette hair)
Explanation:
In animals and humans, melanin pigments play key roles in eye, hair, and skin coloration. Basically, there are three main types of melanin pigments: eumelanin (brown-black and insoluble), pheomelanin (yellow-red and soluble in alkali solution) and neuromelanin (found in some parts of the brain). Eumelanin is predominant in black people and brunette hair people, this being consequently found around the world. There are two distinct classes of eumelanin: black eumelanin and brown eumelanin, which differ in their patterns of polymeric bonds, and they have an incidence on the type of coloration (e.g., black eumelanin is found in people with grey hair).
Answer:
The correct answer would be - the number of times the student was able to squeeze the clothespin or rate of clothespin squeezing.
Explanation:
The dependent variable is the variable that depends on the change in the independent variable and measured or needs to be found in a scientific experiment or investigation.
In this experiment, the independent variable would be an exercise to found the effect on the change of the rate of clothespin squeezing or the number of times the students are able to squeeze the clothespin.
Thus, the correct answer would be - the rate of clothespin squeezing.
A)
size = (number of minor spaces x 10μm) / number of ocular spaces
= (2 x 10) / 1
= 20μm
b)Since the RBC has a size of 8μm and the bacterium 20μm, the bacteria is bigger. The Bacterium is bigger than the RBC by 20μm / 8μm
Hence the bacterium is 2.5 times bigger than the RBC.
Red blood cells transport oxygen in the blood.
