Mammals are __________ organisms, whereas plants may be ___________
A. haploid; diploid
B. haploid; polyploid
C. diploid; polyploid
D. diploid; haploid
C
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Until recently, protists have been classified according to observable traits such as modes of nutrition and mechanisms of movement. What is the basis for modern protist classification?
a. their evolutionary relatedness b. their similarity to plants c. their cell wall types d. their types of life cycles
What is a disadvantage of sexual reproduction?
a. Sexual reproduction generates less genetic diversity than asexual reproduction. b. Sexual reproduction decreases the chance that offspring may be able to live and reproduce in diverse environments. c. Sexual reproduction decreases the chance that, in a changing environment, at least some offspring will grow and reproduce successfully. d. Sexual reproduction produces fewer offspring per parent than asexual reproduction. e. On average, sexual reproduction generates unequal numbers of males and females.
Four of the following statements about crocodilians are true. Which statement is false?
a. They live in or near water. b. They are predators with sharp teeth. c. They have a two-chambered heart. d. They have powerful jaws. e. They are the closest living relatives to birds.
Discuss the evolutionary 'pros and cons' of animals living in groups. Name three animal behaviours are necessary for group living? For each behaviour, describe the governors of behaviour that may result in group living
What will be an ideal response?