Answer:
The correct answer will be option-B.
Explanation:
Sertoli cells are the large somatic cells present in the testis which helps in the formation of spermatozoa. The Sertoli cells create a suitable environment for the production and maturation of the sperms as they produce certain molecules which nourishes the sperms.
The Sertoli cells act as a barrier between the testis and blood and secrete enzymes like inhibin. They eliminate the apoptotic germ cells and also produce seminiferous fluid to nourish the sperm. They do not play any role in primary spermatocytes.
Thus, Option-B is the correct answer.
Answer:
Mendel was a mathematician and a physicist. He was tutored by Christian Doppler known for his work "Doppler effect of wave frequency".
Mendel learned botany under Franz Unger.
Both knowledge of science and math helped him notice some patterns, traits and qualities in the gardens he had.
With that idea, he was able to see the chances or portability of developing such traits and how to prove it.
It indicates what elements is composed by and how many atoms of one element are linked to the other.
For example, this is the formula for table salt is:
NaCl
The formula indicates that table salt (sodium chloride) is composed by sodium (Na) and chlorine (Cl) on a 1:1 ratio.
Hope it helped,
BioTeacher101
Answer:
Light travels in straight lines.
Explanation:
Once light has been produced, it will keep travelling in a straight line until it hits something else.
Answer:
Amino acids.
Explanation:
DNA is the genetic material of all the organisms except some viruses. DNA has the ability to replicate and produce daughter DNA cells by the process of replication.
DNA is made of polymers of nucleotides. DNA consists of nitrogenous base, in which adenine is linked with thymine, cytosine with guanine thriugh hydrogen bonding ,shows complementary base pairing. Pentose deoxyribose sugar and phosphate group. The DNA molecules are linked together through phosphodiester bonds. Amino acids is present in protein.
Thus, the answer is option (4).
