Reproduction and Mitosis

Which statement correctly describes a difference between asexual and sexual reproduction?

• Asexually reproducing organisms do not have DNA, while sexually reproducing organisms have DNA.

• Asexually reproduced offspring have less variety in their genetic information than sexually reproduced offspring.

• Asexually reproduced offspring have the same amount of genetic information as the parent, while sexually reproduced offspring have half as much genetic information as a parent.

• Asexual reproduction in organisms takes longer than sexual reproduction due to the time required to find a mate.

Vertebrate animals produce offspring by sexual reproduction. Which is an advantage of this type of reproduction?

• Time and energy is used to find a mate in the population.

• There is increased genetic diversity within the population.

• The offspring grows faster than one that is produced asexually.

• The offspring receives its DNA from one parent and is identical to that parent.

All of the inherited traits that are passed to offspring during asexual reproduction come from a single

• egg.

• sperm.

• virus.

• parent.

The diagram shows the amount of bacteria present at several time points as it divides.

Which number most accuratelypredicts the amount of bacteria that would be counted at 80 minutes?

• 4

• 8

• 16

• 32

Which statement best describes the process of asexual reproduction under normal conditions?

• It is the formation of identical offspring by two parents.

• It is the formation of identical offspring by a single parent.

• It is the formation of non-identical offspring by two parents.

• It is the formation of non-identical offspring by a single parent.

Organisms that reproduce asexually generally have offspring that are

• unicellular.

• multicellular.

• genetically varied.

• genetically identical.

How can the production of a seed by a flower be classified, and why?

• Sexual reproduction; the offspring of the flower is always identical to the female flower.

• Sexual reproduction; pollen from a male structure is required to fertilize the egg in a female structure.

• Asexual reproduction; only one flower is required to produce a seed.

• Asexual reproduction; the seed is produced by the female flower.

A female parent snail with a striped shell and a male parent with no stripes produce five offspring, as shown.

Which statement best explains the reason for variation among the offspring?

• In sexual reproduction, only the male parent passes genes to the offspring.

• In sexual reproduction, only the female parent passes genes to the offspring.

• In sexual reproduction, offspring inherit genes from both parents, and each offspring has a new combination of traits.

• In sexual reproduction, the male parent passes its genes to male offspring, and the female parent passes its genes to female offspring.

A particular mountain stream is home to a population of salamanders that are red in color. In the past year, a second population of salamanders that are dark blue in color moved into the same stream. Scientists researching the stream have recently discovered young salamanders that are red with dark blue patches on their bodies.

What can the scientists conclude from this evidence?

• The salamanders are suffering from a bacterial disease.

• The salamanders are on the verge of becoming extinct.

• The salamanders undergo asexual reproduction.

• The salamanders undergo sexual reproduction.

What would likely happen if a multicellular organism no longer performed mitosis?

• The organism would generate new cells only by the process of meiosis.

• The organism would rely on gaining cells from other nearby organisms.

• The organism would adapt to function without the use of cells.

• The organism would die as it is no longer able to replace damaged cells.