Which of the following is an effect of testosterone?
a. promotes rbc production
b. promotes anabolism of proteins
c. promotes growth of skeletal muscles
d. all of above

D- All of the above.

A. Testosterone in RBC production

Amongst many functions testosterone also promote production of red blood cells. Testosterone in general increases sex drive(libido) in man. Red blood cells are responsible for supplying oxygen that is needed during muscle functions and sexual act or arousal. Therefore high libido requires adequate supply of oxygen thus the promotes red blood cells production.

B. Testosterone in protein anabolism.

Testosterone promotes the production of sperm in testes which is more of a protein by nature, thus the constant anabolism of proteins.

C.Promotes growth of skeletal muscles.

Abundant secretion of testosterone hormone gives man their masculanity and high muscle mass. Puberty stage symptoms in man is their skeletal muscle growth which is because of increased testosterone level.

Therefore the answer is D.

1: most common garden plants prefer loam — soils with a balance of different-sized mineral particles (approximately 40% sand, 40% silt, and 20% clay) with ample organic matter and pore space. however, some plants grow better in sandy soils, while others are well-adapted to clay soils.

2: available water capacity is the maximum amount of plant available water a soil can provide. it is an indicator of a soil's ability to retain water and make it sufficiently available for plant use. available water capacity is the water held in soil between its field capacity and permanent wilting point.

3: it is the same for all living things (plants and animals). it also includes very tiny organisms that our eyes cannot see. they are known as microorganisms, and include viruses, bacteria and fungi.