during a life cycle of adult lancet fluke live in cows. They spread their eggs in cow manure, snails eat the eggs and the immature parasites hatch and infect their intestine. The snail coughs up these offspring in balls of slime and ants eat these slime balls loaded with flukes. The flukes migrate to the ant’s head and make them climb to the tops of grass blades where they are eaten by cows and the cycle starts over again

a. Only ant act as inntermediate host 

b. both snail and Ant act as intermediate host

c. cow act as definitive host due to sexual reproduction

d. only snail act as intermediate host due to asexual reproduction

#Question id: 4627

#Unit 11. Evolution and Behavior

Which of the following is not one of Charles Darwin's observations?

#Question id: 4628

#Unit 11. Evolution and Behavior

Which group is composed entirely of individuals who maintained that species are fixed (i.e., unchanging)?

A) Linnaeus

B) Lyell

C) Darwin

D) Aristotle

E) Cuvier

#Question id: 4629

#Unit 11. Evolution and Behavior

In the mid-1900s, the Soviet geneticist Lysenko believed that his winter wheat plants, exposed to ever-colder temperatures, would eventually give rise to ever more cold-tolerant winter wheat. Lysenkoʹs attempts in this regard were most in agreement with the ideas of

#Question id: 4630

#Unit 11. Evolution and Behavior

Which pair would have been likely to agree that strata such as those depicted here were deposited gradually over long periods of time by subtle mechanisms that are still at work?

#Question id: 4631

#Unit 11. Evolution and Behavior

As a young biologist, Charles Darwin had expected the living plants of temperate South America would resemble those of temperate Europe, but he was surprised to find that they more closely resembled the plants of tropical South America. The biological explanation for this observation is most properly associated with the field of

#Question id: 4632

#Unit 11. Evolution and Behavior

Which of these conditions should completely prevent the occurrence of natural selection in a population over time?