Biol1001 Questions. Please Help and explain why! 1. One could apply the phylogen

Question

Biol1001 Questions. Please Help and explain why!

1. One could apply the phylogenetic species concept by

Select one:

a. mating two organisms to see if viable offspring result.

b. tracing the common ancestry of two organisms.

c. looking at the appearance of two organisms.

d. determining the overall similarity in the genome of two organisms.

2. If a tetraploid species gave rise to a new species by autopolyploidy, how many sets of homologous chromosomes would the new species have in its somatic cells?

Select one:

a. Eight

b. Three

c. Two

d. Four

e. Sixteen

3. The Biological Species Concept classifies a species based on

Select one:

a. The role the organism plays in the environment.

b. Morphological characteristics

c. Both morphological characteristics and reproductive isolation.

d. Genetic relationships between an organism and its ancestor.

e. Reproductive characteristics

4. In some Drosophila species, conditions in the female reproductive tract do not allow the sperm of other species to survive long enough for fertilization to occur. What mechanism of reproductive isolation is in operation in this example?

Select one:

a. Gametic isolation.

b. Mechanical isolation.

c. Temporal isolation.

d. Low hybrid viability.

Explanation / Answer

1) . tracing the common ancestry of two organisms..

2) four

3) reproductive characteristics.

The biological species concept is the most widely accepted species concept. It defines species in terms of interbreeding. "species are groups of interbreeding natural populations that are reproductively isolated from other such groups."

4) low hybrid viability.

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