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TLS Online TPP Program

#Question id: 9224

Which of the following strategies would most rapidly increase the genetic diversity of a population in an extinction vortex?

#Unit 9. Diversity of Life Forms

  1. Capture all remaining individuals in the population for captive breeding followed by reintroduction to the wild.

  2. Establish a reserve that protects the population's habitat.
  3. Introduce new individuals transported from other populations of the same species.
  4. Sterilize the least fit individuals in the population
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TLS Online TPP Program

#Question id: 16118

#Unit 7. System Physiology – Animal

Following statements are regarding to the heat production by the activation of sympathetic nervous system.
A. Activation is stimulation of β receptors in brown fat, which increases metabolic rate and heat production.
B. Activation is stimulation of α2 receptors in brown fat, which increases metabolic rate and heat production.
C. Stimulation of α1 receptors in vascular smooth muscle of skin blood vessels, producing vasoconstriction. Vasoconstriction reduces blood flow to the surface of the skin.
D. Stimulation of α1 receptors in vascular smooth muscle of skin blood vessels, producing vasodilation. Vasodilation reduces blood flow to the surface of the skin.
Which of the following combination is correct?
TLS Online TPP Program

#Question id: 8963

#Unit 9. Diversity of Life Forms

What kind of data should probably have the greatest impact on animal taxonomy in the coming decades?
TLS Online TPP Program

#Question id: 1518

#Unit 4. Cell Communication and Cell Signaling

Following statements are regarding to the some cancers harbor characteristic chromosome alterations. Chronic myelogenous leukemia (CML), a common leukemia in humans, was found to be associated with the Philadelphia chromosome.

A. Philadelphia chromosome is generated by a translocation between chromosomes 22 and 9. The two chromosomes exchange their terminal regions, which leads to a characteristic alteration in the size of chromosome 9.

B. At the breakpoint of this translocation, a new fusion protein, the BCR-ABL fusion, is generated.

C. The BCR-ABL fusion protein is a constitutively active kinase that phosphorylates multiple signal-transducing proteins.

D. If this translocation occurs in a hematopoietic cell in the bone marrow, the activity of the chimeric BCR-ABL oncogene dephosphorylate proteins thereby activating many intracellular signal-transducing proteins.

Which of the following statements are incorrect?
TLS Online TPP Program

#Question id: 11306

#Unit 2. Cellular Organization

Which of the following factors would tend to increase membrane fluidity?
TLS Online TPP Program

#Question id: 5669

#Unit 5. Developmental Biology

What is the reproductive difference between sea urchins and mammals is?