Question

question 3
the process by which new species originate:
a is extinction
b occurred only once in earths history
c is germination
d is speciation
e occurred for millions of years but is no longer occurring

10 points
question 4
a male from species a mates with a female from species b. male as sperm swims and finds the egg, but the sperm is
unable to penetrate the egg. this is an example of _.
a temporal isolation.
b gametic isolation.
c behavioral isolation.
d ecological isolation.
e hybrid infertility.

Explanation:

Question 3

• Extinction (A) is the disappearance of a species, not its origin.
• Speciation (the origin of new species) has occurred many times in Earth's history, not just once (B is wrong).
• Germination (C) is related to the growth of a plant from a seed, not species origin.
• Speciation is an ongoing process (E is wrong). Speciation (D) is defined as the process by which new species originate.

• Temporal isolation (A) occurs when species breed at different times.
• Gametic isolation (B) happens when gametes (sperm and egg) of different species cannot fuse. In this case, the sperm can't penetrate the egg, which is gametic isolation.
• Behavioral isolation (C) is due to differences in mating behaviors.
• Ecological isolation (D) is related to different habitats.
• Hybrid infertility (E) is when hybrids (offspring of different species) are infertile, which is not the case here (fertilization doesn't even occur).

Answer:

D. Is speciation

Question 4