Reproduction and Development

In which situation(s) is asexual reproduction an advantage for an organism that can reproduce either sexually or asexually?

• When a mate is not available.

• When the environment changes suddenly.

• When the environment is stable.

• When mates are readily available.

Which events take place during mammalian sexual reproduction?

• Gamete formation

• Spore formation

• Fertilization

• Zygote formation

Which of the following describes vegetative reproduction?

• Succulent leaves produce a new plant when placed in moist soil.

• Flowering plants produce seeds after fertilization.

• Seeds placed in moist soil produce new plants.

• A twig cut from the main tree can be grafted onto a new tree of a different species.

A portion of the dragonfly life cycle occurs in water. What would be the effect(s) of a very rainy season?

• Fewer eggs are laid than usual.

• More nymphs than usual hatch.

• Fewer nymphs than usual survive due to competition for food.

• Rapid development of nymphs due to additional food supply.

In the life cycle of a pine tree, what step(s) must happen in order for seeds to be produced?

• A female cone with fertilized eggs matures into a seed cone.

• A spore divides and grows into a pollen grain.

• Male cones produce spores.

• A seed containing an embryonic plant develops into an adult tree.

In the life cycle of a butterfly, which steps occur after the caterpillar stage?

• The caterpillar produces a chrysalis and becomes a pupa.

• An adult with wrinkled wings emerges from the chrysalis.

• An adult butterfly lays eggs on a leaf.

• A caterpillar hatches from an egg and begins feeding on the leaf it is on.