Exam 19: Introduction to the Angiosperms

Sporopollenin protects the microgametophyte against UV radiation.

Microsporocytes divide by ______, forming ______.

The pollen tubes of gymnosperms grow faster than the pollen tubes of angiosperms.

In some angiosperms, the food store of the seed is perisperm derived from the:

A carpel is a leaflike structure that contains ovules.

Angiosperms have archegonia but lack antheridia.

Which of the following statements about a stamen is FALSE?

Wet stigmas have a cuticle that contains a hydrated layer of proteins, carbohydates, and lipids.

An example of connation is the union of stamens with:

All the petals of a flower are collectively called the calyx.

Unlike gymnosperms, the stored food in angiosperms is:

All bilaterally symmetrical flowers are:

Perisperm develops from the proliferation of the nucellus.

In angiosperms, the ovary develops into a(n):

A polymer in the _____ protects the pollen grain against UV radiation, dehydration, and pathogen attack.

As the seed develops, the ovary wall becomes the:

In a carpel, the style connects the stigma with the ovary.

By definition, a flower with a aposepalous calyx has:

In a myco-heterotrophic relationship, the ______ transfers carbohydrates to the _______.

About 70% of living angiosperms have a(n) _______ type of megasporogenesis and megagametogenesis.