Exam 24: Reproduction and Development of Flowering Plants

As a seed germinates,its shoot points upward toward light,and its roots grow downward into the soil.Turn the plant sideways,and the stem and roots bend according to the new direction of gravity.How do roots and shoots grow in opposite directions as the plant is rotated?

Typically in a flower the sepals _____,while the petals _____.

Clones are

The type of fruit that is derived from one flower with many separate carpels is a _____________ fruit.

The ___ is an example of a(n)___ fruit that is derived from tightly clustered flowers whose ovaries have fused.

The root and shoot apical meristems form at the same point in the plant embryo.

Cytokinins are water-soluble hormones produced in the root apical meristem and stimulate the growth of lateral buds.How do cytokinins reach the lateral buds?

As a seed germinates,its shoot points upward toward light,and its roots grows downward into the soil.Turn the plant sideways,and the stem and roots bend according to the new direction of gravity.How do roots respond to gravity?

The egg-bearing structure of a flower is the

A sweet substance used by many angiosperms to lure pollinators is

On a field trip,clearing clouds and warming temperatures reveal red flowers along the trail.You will expect them to be visited and pollinated by

If a gardener cuts the apical meristem of a plant,lateral buds begin to grow which causes a bushier shape to develop.This is because the apical meristem normally secretes auxins that do which of the following?

You plant a seed into a pot containing some soil,and then add water and place the pot under a light.After the seedling emerged,complete with two green leaves,the carbon dioxide levels decreased in the closed chamber.This indicated that _________ was occurring.

A biochemical synthesized in small quantities in one part of an organism and transported to another,where a target cell is affected is a(n)

Coconuts are fruits containing seeds that are usually wind dispersed.

The size of a plant's seeds reflects an evolutionary trade-off.Large,heavy seeds contain ample nutrient reserves to fuel seedling growth but may not travel far.Small seeds,on the other hand,store limited nutrients but tend to disperse far and wide.The crops that humans cultivate typically have larger seeds than do their wild ancestors.How has human farming altered the evolution of these crops?

The plant hormone that stimulates cell division in seeds and fruits is

Packages of vegetable seeds typically include an ideal planting depth.If planted too deep,the seeds will not germinate.How do the plants sense if they are too deep?

Peppers that produce more capsaicin would lose fewer seeds to herbivores.This would lead to which of the following?

A tissue that is formed from a triploid nucleus and that stores food for the developing plant embryo is the