TLS Online TPP Program

#Question id: 5543


What is the purpose of the chorion in terrestrial vertebrate embryos?

#Unit 5. Developmental Biology
  1. To keep the embryo moist

  2. To exchange oxygen and carbon dioxide with the environment

  3. To absorb nutrients stored in yolk

  4. To store nitrogenous waste

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TLS Online TPP Program

#Question id: 3776

#Unit 3. Fundamental Processes

Telomere shortening puts a limit on the number of times a cell can divide. Research has shown that telomerase can extend the life span of cultured human cells. How might adding telomerase affect cellular aging?

TLS Online TPP Program

#Question id: 5215

#Unit 11. Evolution and Behavior

What is it about short tandem repeat DNA that makes it useful for DNA fingerprinting?

TLS Online TPP Program

#Question id: 19231

#Unit 12. Applied Biology

Microprojectile bombardments can be used to introduce foreign DNA into plant 
1. Cell suspensions
2. Callus cultures
3. Meristematic tissues
Which of the following above statements are correct?

TLS Online TPP Program

#Question id: 9620

#Unit 9. Diversity of Life Forms

The two extant species that are most closely related to each other are

TLS Online TPP Program

#Question id: 4893

#Unit 8. Inheritance Biology

In tomatoes, tall (D) is dominant over dwarf (d) and smooth fruit (P) is dominant over pubescent fruit (p), which is covered with fine hairs. A farmer has two tall andsmooth tomato plants, which we will call plant A and plant B. The farmer crosses plants A and B with the same dwarf and pubescent plant and obtains the following numbers of progeny

a. The genotypes of both plant A and plant B are DdPp

b. In plant A, Gene D and Gene P link as cis configuration

c. In plant B, Gene D and Gene P link as cis configuration

d. In plant A, Gene D and Gene P link as trans configuration

e. In plant B, Gene D and Gene P link as trans configuration

Which of the following above statement are not correct?