Some questions about the Animal Kingdom…?

Posted July 1st, 2009 by admin in category metabolism

Metabolism

1. Among the characteristics unique to animals is

a. gastrulation.
b. multicellularity.
c. sexual reproduction.
d. flagellated sperm.
e. heterotrophic nutrition.

2. Which of the following was the least likely factor causing the Cambrian explosion?

a. the emergence of predator-prey relationships between animals.
b. the accumulation of diverse adaptations, such as shells and different modes of locomotion.
c. the movement of animals onto land
d. the evolution of Hox genes that controlled development
e. the accumulation of sufficient atmospheric oxygen to support the more active metabolism of mobile animals

3. Bilateral symmetry in the animal kingdom is best correlated with

a. an ability to sense equally in all directions.
b. the presence of a skeleton.
c. motility and active predation and escape.
d. development of a true coelom.
e. adaptation to terrestrial environments.

4. Acoelomates are characterized by

a. the absense of a brain.
b. the absence of mesoderm.
c. deuterostome development.
a coelom that is not completely lined with mesoderm.
e. a solid body without a cavity surrounding internal organs.

5. A direct consequence of indeterminate cleavage is

a. formation of the archenteron.
b. the ability of cells isolated from the early embryo to develop into viable individuals.
c. the arrangement of cleavage planes perpendicular to the egg’s vertical axis.
d. the unpredictable formation of either a schizocoelous or enterocoelous body cavity.
e. a mouth that forms in association with the blastopore.

1. a) Gastrulation.
2. c) The movement of animals onto land
3. c) Motility and active predation and escape.
4. e) A solid body without a cavity surrounding internal organs.
5. b) The ability of cells isolated from the early embryo to develop into viable individuals.

Category: metabolism

One Response »

Nayrb on July 2nd, 2009 at 2:39 am:
1. a) Gastrulation.
2. c) The movement of animals onto land
3. c) Motility and active predation and escape.
4. e) A solid body without a cavity surrounding internal organs.
5. b) The ability of cells isolated from the early embryo to develop into viable individuals.
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