TLS Online TPP Program

#Question id: 3464


Adult male humans generally have deeper voices than do adult female humans, which is the direct result of higher levels of testosterone causing growth of the larynx. If the fossil records ofapes and humans alike show a trend toward decreasing larynx size in adult females and increasing larynx size in adult males, then

#Section 2: Evolution
  1. sexual dimorphism was evolving over time in these species

  2. intrasexual selection seems to have occurred in both species

  3. stabilizing selection was occurring in these species concerning larynx size

  4. selection was acting more directly upon genotype than upon phenotype

More Questions
TLS Online TPP Program

#Question id: 11410

#Section 5: Applied Ecology & Evolution

Biodiversity hot spots, those areas with the greatest number of endemic species. Which of the following criteria to qualify as a hot spot region?

A. It must contain at least 1,500 species of vascular plants as endemics

B. It must have lost at least 70% of its original habitat

C. It must contain at least 500 species of bird species

D- It must contain high numbers of species

TLS Online TPP Program

#Question id: 10599

#Section 1: Ecology

In a type I survivorship curve characterized by:

TLS Online TPP Program

#Question id: 9198

#Section 5: Applied Ecology & Evolution

Tropical forests are being converted to farm or pasture land at an alarming rate, and one major focus is on the biodiversity and the impact to these ecosystems. What is a direct benefit to humans that helps explain why these forests need to be preserved?

TLS Online TPP Program

#Question id: 3422

#Section 2: Evolution

Micro-evolution is the term used for changes in allele frequencies that occur over time.

A) It gives rise to changes in the gene pool, which results in few changes in the same species

B) It occur above species level

C) New addition, deletion in the genetic structure, resulting in the formation of new species

D) It changes occurs over short time scales

Which of the following combinations is correct?

TLS Online TPP Program

#Question id: 3393

#Section 2: Evolution

Natural Selection can maintain a polymorphism when

a. heterozygote is fitter than the homozygote

b. Fitnesses of genotypes are negatively frequency dependent.

c. Fitnesses of genotypes are positive frequency dependent.

d. One homozygote is fitter than the heterozygote