Can a man be a carrier for a sex-linked recessive trait? Explain.

X-linked recessive inheritance
A female with a mutation in one copy of a gene on the X chromosome is said to be a “carrier” for an X-linked condition. ... Because females have two copies of the X chromosome and males have only one X chromosome, X-linked recessive diseases are more common among males than females.

answer: - b cells

explanation: -

there are many types of white blood cells present in our body. one such class of white blood cells are the lymphocytes. the b cells belong to the lymphocyte class of wbcs. the b cells perform their action against the pathogen by producing specialised proteins called as antibodies. these antibodies are produced as and when the b cells encounter pathogens in response to the antigens present on the surface of the pathogen. these antibodies bind to the antigens present on the pathogen and then, target them for destruction by other cells of the immune system.

so, the b cells mediate their action by identifying the antigens present on the surface of the pathogens and then producing antibodies in return to mediate its effect.

If you remove all the lions from the savanna it will lead to a increase of gazelle and a increase of cheetahs becasue of no competition