Answer
Gametes that fertilize an ovum are called the sperms
Explanation
The reproductive cells of an organism are called the gametes or sex cells. Female sex cells are the ova/egg where as male sex cells are the sperms. The sperms are stored in the scrotum after their production in the male testes where as the eggs for females mature in female ovaries. During fertilization, sex cells meet in the Fallopian tube.
Answer: Option B. are able to drift about in the plasma membrane.
Explanation:
Membrane phospholipid are having a amphiphilic structure which contains a hydrophilic "head" consisting of a phosphate group and two hydrophobic fatty acid "tails" that are connected to a glycerol molecule.
In contact with water, membrane phospholipid hydrophobic tail avoid interaction with water molecules and allow to drift about in the plasma membrane. the hydrophilic heads line up against each other and forms lipid bi-layer that faces towards water.
The movement of membrane phospholipid forms the fluid mosaic model,in which lipid molecules act as solvent and proteins embedded in it. This allows the proteins and lipid to move across plasma membrane.
Hence, The structural property of membrane phospholipid makes them able to drift about in the plasma membrane
Here are the answers to the given questions above.
1. Since the Duffy antigen can be found in most individuals residing in Western Africa and that recently, this can be already found in many white European populations, the process the explains this is what we call gene flow. The answer is option A.
2. The physical factors that are considered mostly influences the Antarctic ecosystem are weather, ice, and ocean currents. The answer would be option C. Hope this helps.
