In the ___ stage, the plant produces sperm and egg cells.

Flowering plants that live for more than two years are called

The product of fertilization, when sperm unites with egg, is called

Asexual reproduciion can reproduce unfavorable traits since there is no new genetic info being passed on to offspring.

Mosses, ferns, and hornworts all live in ___ environments.

Where are seeds made on a gymnosperm?

How many egg cells form inside each ovule on the female cone?

The female cone stays sealed until

A captured pollen grain on a stigma grows a pollen tube to the

___ are the means by which angiosperm seeds are dispersed.

A mimosa plant closing up after being touched is an example of a

A plant stem growing upward after the plant's pot has fallen over is an example of

A plant hormone that speeds up the rate at which a plant's cells grow and controls a plant's response to light

Which plants flower when the nights are longer than a critical length?

A plant's response to seasonal changes in the length of night and day is called

Leaves change color because

Plants do NOT

Plants are not used for medicines

Vegetables, fruits, and cereals all come from

Conifer sap is used to make

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