What is the reproductive structure of an angiosperm called?

A flower

True/False: The calyx is the innermost whorl of a flower.

False. The calyx is the outermost whorl composed of sepals.

Which whorl contains petals that attract pollinators?
A) Calyx
B) Corolla
C) Androecium
D) Gynoecium

B) Corolla

The male reproductive whorl is called _____.

Androecium

What are the two main parts of a stamen?

Filament and anther

How many microsporangia are typically found in a dithecous anther?

Four microsporangia

Which layer nourishes developing pollen grains?
A) Epidermis
B) Endothecium
C) Tapetum
D) Middle layers

C) Tapetum

What happens during microsporogenesis?

Pollen mother cells undergo meiosis to produce haploid microspores

The outer wall of pollen grain is called _____ and is made of _____.

Exine, sporopollenin

True/False: Most angiosperms shed pollen in the 3-celled stage.

False. Over 60% of angiosperms shed pollen in the 2-celled stage.

What are the three parts of a pistil from top to bottom?

Stigma, style, and ovary

Where do ovules develop in flowering plants?
A) Style
B) Stigma
C) Ovary
D) Anther

C) Ovary

The opening in an ovule through which the pollen tube enters is called _____.

Micropyle

How many megaspores typically survive after megasporogenesis?

One functional megaspore

A mature embryo sac is _____ celled but _____ nucleate.

Seven, eight

What is the egg apparatus composed of?

Two synergids and one egg cell

Transfer of pollen from anther to stigma of the same flower is called?
A) Geitonogamy
B) Xenogamy
C) Autogamy
D) Cleistogamy

C) Autogamy

True/False: Geitonogamy is genetically equivalent to cross-pollination.

False. Geitonogamy is genetically equivalent to selfing.

Wind-pollinated flowers typically have _____ stigmas to catch airborne pollen.

Large, feathery

Why do most flowering plants have outbreeding devices?

To prevent inbreeding depression and promote genetic diversity

Which mechanism prevents self-pollen from fertilizing ovules?
A) Emasculation
B) Self-incompatibility
C) Bagging
D) Cleistogamy

B) Self-incompatibility

In dioecious plants, male and female flowers are found on _____ plants.

Different

What guides the pollen tube to enter the synergid?

Filiform apparatus

The removal of anthers before dehiscence is called _____.

Emasculation

True/False: Double fertilization involves fusion of two male gametes with the egg.

False. One fuses with egg, other with polar nuclei.

What is the ploidy of the primary endosperm nucleus?
A) Haploid
B) Diploid
C) Triploid
D) Tetraploid

C) Triploid

The nutritive tissue that develops from primary endosperm nucleus is called _____.

Endosperm

In dicot embryos, the shoot apex is called _____ and root tip is called _____.

Plumule, radicle

What protects the shoot apex in monocot embryos?

Coleoptile

Seeds where endosperm is consumed during development are called _____ seeds.

Non-albuminous

Development of fruit without fertilization is called?
A) Apomixis
B) Parthenocarpy
C) Polyembryony
D) Parthenogenesis

B) Parthenocarpy

True/False: Apomixis produces genetically diverse offspring.

False. Apomixis produces genetically identical offspring.

Occurrence of more than one embryo in a single seed is called _____.

Polyembryony