It tends to favor the common phenotypes and eliminate variation from a population.

• A) Oscillating selection
• B) None of these
• C) Positive frequency-dependent selection
• D) Negative frequency dependent selection

In __________ any allele may increase or depart the population.

• A) Natural selection
• B) Mutation
• C) None of these
• D) Genetic drift

Extinct hippopotamus like animal, now called

• A) Greater Rhea
• B) Toxodon
• C) Thoantherium
• D) Glyptodonts

Stock of different genes in an interbreeding population is called as________.

• A) Gene pool
• B) Genetic drift
• C) Gene flow
• D) Gene reservoir

In___________, the fitness of a phenotype does not depend on its frequency

• A) Oscillating selection
• B) Both of these
• C) None of tese
• D) Frequency dependent selection

Gradual changes over the time with changing environment was foundation of

• A) Theory of uniformitarianism
• B) Theory of natural selection
• C) None of these
• D) Theory of inheritance of acquired characteristics

Inbreeding is common in ________population.

• A) Small
• B) Endangered
• C) Large
• D) Conspicuous

Which of the following is NOT the component of Fitness?

• A) Mating success
• B) Survival
• C) High mortality rate
• D) Number of offspring per mating

Who suggested that genes are responsible for traits?

• A) Lamarck
• B) Mendel
• C) Darwin
• D) Weismann

It favors the rare phenotype and makes them more common to maintain variation.

• A) Oscillating selection
• B) Negative frequency-dependent selection
• C) Positive frequency-dependent selection
• D) None of these

It acts against only one extreme of phenotypes, causing a shift in distribution toward the other extreme.

• A) Directional Selection
• B) Oscillating
• C) Stabilizing Selection
• D) Disruptive Selection

Enzyme lactate dehydrogenase in mummichog populations in North are better catalyst at ______temperatures.

• A) Moderate
• B) High
• C) Low
• D) None of these

Which of the following reduce genetic variation within a population?

• A) Crossing over
• B) None of these
• C) Mutation
• D) Inbreeding

Female sea star releases about ______eggs each season.

• A) 10 million
• B) 3 million
• C) 5 million
• D) 1 million

It may promote or constrain evolutionary changes.

• A) Natural selection
• B) Genetic drift
• C) Mutation
• D) Gene flow

Sickle cell anemia is _____________ trait.

• A) Heterozygous
• B) none of these
• C) Homozygous recessive
• D) Homozygous dominant

Horses had been present and had become extinct long ago in___________.

• A) N.America
• B) Africa
• C) S.America
• D) Asia

The process of ________is analogous to flipping a coin.

• A) Gene mutation
• B) None of these
• C) Genetic drift
• D) Gene flow

HMS Beagle set sail on December 27, 1831 on a _____year voyage.

• A) 1 year
• B) 5 years
• C) 7 years
• D) 3 years

___________traits become less frequent in a population and eventually are eliminated.

• A) none of these
• B) Adaptive
• C) Maladaptive
• D) High- quality