The correct answer is slow twitch.
There are generally two types of skeletal muscle fibers present in the body of humans. These are slow twitch fibers and the fast twitch fibers. The slow twitch fibers in the muscle allow the long endurance responses to the muscles, on the other hand, the fast twitch fibers generate a fast response in the muscles.
Envelope is not essential part of virus (option B)
A virus is a small, infectious agent that can replicate only inside the cells of living hosts. Viruses are not considered living organisms because they do not have their own metabolism or cell structure.
The essential parts of a virus are:
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by determining changes in the heartbeat
B.
by determining changes in blood pressure
C.
by determining changes in blood components
D.
by determining changes in arterial blood flow
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Answer:
A. by determining changes in the heartbeat.
Answer:
determining heartbreak
Which pair of numbers shows the chromosome
number of a normal gamete from each of these
species?
(1) human 46; frog 12 (3) human 23; frog 24
(2) human 46; frog 24 (4) human 23; frog 12
The number of chromosomes for the gamete of each of the species would be half of that of their vegetative cells.
Haploid cells contain half (n) the number of chromosomes of diploid cells (2n)
Gametes are generally haploid in nature.
The human skin cells are vegetative cells (2n), thus a gamete of humans would have 23 or (46/2) chromosomes.
The frog sperm cell is a gamete cell. Hence, the chromosome number remains 12.
In other words, human gametes will have 23 chromosomes while frog gametes will have 12.
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Answer: Human 23; frog 12
Explanation: Skin cells are somatic cells, that means the they build the body and divide by mitosis. This kind of cells have genetic charge 2n or twice of the gamete's chromosomes, so a human gamete (sperm or ovum) has 23 chromosomes (46/2 = 23).
Frog sperm cell is a gamete so it has the number of chromosomes for this type of cell which is 12