TLS Online TPP Program

#Question id: 7279


X chromosome number alone is the primary sex determinant in normal drosophila because:

#Unit 5. Developmental Biology
  1. The X chromosome contains genes encoding transcription factors that activate the critical gene in Drosophila sex determination.
  2. Male and female parts and their sex-linked characters are activated by Y chromosome.
  3. The number of X chromosome is greater than number of Y chromosome.
  4. Only X chromosome is active, Y chromosome is inactive.
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TLS Online TPP Program

#Question id: 3486

#Unit 9. Evolution & Diversity of Life Forms

Which of the following might affect the foraging behavior of an animal in the context of optimal foraging?

A) risk of predation

B) prey size

C) prey defenses

TLS Online TPP Program

#Question id: 3487

#Unit 9. Evolution & Diversity of Life Forms

Which of the following is true of innate behaviors?

A) Genes have very little influence on the expression of innate behaviors.

B) Innate behaviors tend to vary considerably among members of a population.

C) Innate behaviors are limited to invertebrate animals.

D) Innate behaviors are expressed in most individuals in a population across a wide range of environmental conditions.

E) Innate behaviors occur in invertebrates and some vertebrates but not in mammals.

TLS Online TPP Program

#Question id: 3488

#Unit 9. Evolution & Diversity of Life Forms

According to Hamiltonʹs rule,

TLS Online TPP Program

#Question id: 3489

#Unit 9. Evolution & Diversity of Life Forms

 In a bird species A, the male alone builds the nest, incubates the eggs and feeds the nestling. In bird species B, it is the female that does all that. In bird species C, both sexes contribute equally to the above activities. In species A and B, the uninvolved partner may fly away and mate again. Which sex among A, B and C is most likely to develop colorful plumage during breeding season?

TLS Online TPP Program

#Question id: 3490

#Unit 9. Evolution & Diversity of Life Forms

Given below are some behaviors strategies.

A) Fixed action pattern, complex sequence of behavior, Once released and continuous to completion, even when there is change in surrounding environment

B)  natural selection select that territorial behavior that is benefit is greater than cost 

C) Imprinting, a form of learning in which a very young animal fixes its attention on the first object with which it has visual, auditory, or tactile experience

D) Donor benefits at a cost to the recipient, the behavior is altruistic; when the recipient benefits at a cost to the donor, the behavior is selfish.

Which one of the following correct combination of true and false?

TLS Online TPP Program

#Question id: 3491

#Unit 9. Evolution & Diversity of Life Forms

Some dogs love attention, and learns that if he barks, he gets attention. Which of the following might you use to describe this behavior?

A) The dog is displaying an instinctive fixed action pattern.

B) The dog is trying to protect its territory.

C) The dog has been classically conditioned.

D) The dog's behavior is a result of operant conditioning

E) The dog is displaying controlled by external stimuli