Organisms are classified and divided in a community based on the modern classification system that was published by Carolous Linnaeus in the 18th century.
This criteria is also known as the Linnean system of classification, where the organisms are classified according to the following: Species, Genus, Family, Order, Class, Phylum and Kingdom.
Answer:
3/16
Explanation:
Two true-breeding stocks of pea plants are crossed. One parent has red RR, axial flowers AA and the other has white rr, terminal flowers aa
Parent cross RRAA x rraa
Gamete: RA x ra
F1 gen. RrAa
Selfing of F1. RrAa x RrAa
F2 offspring
Rr x Rr Aa x Aa
RR Rr rr AA Aa aa
3/4 red 1/4 white 3/4 axial 1/4terminal
Probability of plants with white axial flowers is 1/4*3/4 = 3/16
Answer:
The correct answer is option - d. Production of primary spermatocytes.
Explanation:
The accessory cells or supporting cells present within the seminiferous tubules of reproductive system termed as the Sertoli cells. They play various roles in the body and reproductive system.
Sertoli cells make blood-testis barrier in adjacent Sertoli cells in the seminiferous tubules. These cells secrete different types of enzymes and hormones such as inhibin which are also secreted by ovary and placenta in females. Sertoli cells produce seminiferous tubular fluid to provide nutrition to the sperm. Apoptotic germ cells are timely eliminated by these cells.
Thus, the correct answer is option D. Production of primary spermatocytes.
Answer:
A.) the phospholipid heads can interact with water inside and outside the cell
Explanation:
Phospholipid heads are hydrophilic - they are attracted to water. The tails are hydrophobic - they repel water. In the lipid bilayer arrangement - the heads interact with the water inside and outside of the cell, whereas the tails cluster together to avoid the water. These properties are what create the lipid bilayer arrangement which creates a selectively permeable membrane.
