Following statements regarding to the molecular processes of capacitation.

A. The sperm cell membrane is altered by the removal of cholesterol by albumin proteins in the female reproductive tract.

B. Particular proteins or carbohydrates on the sperm surface are lost during capacitation.

C. The membrane potential of the sperm cell becomes more positive as potassium ions leave the sperm. This change in membrane potential may allow calcium channels to be opened and permit calcium to enter the sperm.

D. Calcium and bicarbonate ions are critical in activating cAMP production and in facilitating the membrane fusion events of the acrosome reaction.

E. As a result of cAMP formation, protein phosphorylation occurs. Once they are phosphorylated, some proteins migrate to the surface of the sperm head. One of these proteins is juno, which is critical in sperm-egg fusion.

which one of the following combinations is correct?

TLS Online TPP Program

#Question id: 10863

#Unit 10. Ecological Principles

According to the ____________ principle, two species with identical requirements for existence cannot coexist indefinitely

TLS Online TPP Program

#Question id: 10864

#Unit 10. Ecological Principles

Which of the following represent ways in which two ecologically similar species can avoid competing with each other?

TLS Online TPP Program

#Question id: 10865

#Unit 10. Ecological Principles

In the Lotka-Volterra model of competition, coexistence between species 1 and species 2

TLS Online TPP Program

#Question id: 10866

#Unit 10. Ecological Principles

A form of competition, found in desert shrubs and sponges, in which one organism releases a chemical into the environment that inhibits another, is referred to as

TLS Online TPP Program

#Question id: 10867

#Unit 10. Ecological Principles

Plants that inhabit stable environments tend to produce ________ seeds.

TLS Online TPP Program

#Question id: 10868

#Unit 10. Ecological Principles

Which of the following relationships describes competition?