Question

Which of the following modes of reproduction would probably be most adaptive in an unstable, changing environment?

	A.	reproduction by budding
	B.	reproduction by fragmentation
	C.	reproduction by parthenogenesis
	D.	sexual reproduction
	E.	vegetative reproduction

Which of the following might affect levels of precipitation in a given area?

	A.	latitude
	B.	elevation
	C.	distance from a large body of water
	D.	location relative to large mountains
	E.	all of the above

Which of the following is NOT made of the structural protein called keratin?

	A.	reptile scales
	B.	insect exoskeletons
	C.	mammalian hair
	D.	bird feathers
	E.	the claws, fingernails, hooves, and horns which may be featured by birds, reptiles, or mammals

Answer 1

1. Option D is correct

Sexual reproduction is a mode of reproduction which generates far more variations in a population as compare to the asexual reproduction. If the environment is unstable and changing then the organisms with more variations would have more chances of survival due to natural selection. Since with changing environment some individuals might survive and reproduce.

Budding, fragmentation, parthenogenesis and vegetative reproduction are types of asexual reproduction due to less difference amongst the members of a population all may perish together with changing environment.

2. Option E is correct

Precipitation in an area is affected by the latitude, location relative to large mountains, elevation and distance from a large water body.

3. Option B is correct

Exoskeleton of insects is made up of a polysaccharide known as the chitin.

reptile scales, mammalian hair, bird feathers, claws, finger nails, hooves and horns are made up of keratin.