Lecture 12 Angiosperms

Question 1

What are Anthophyta?

Answer 1

The phylum Anthophyta, meaning flowering plants. That make up the vast majority of seed plants.

Question 2

What does the root word “Anthos” mean?

Answer 2

Flower

Question 3

What is a flower?

Answer 3

A flower is a specialized shoot with up to 4 whorls of modified leaves.

Question 4

What are the 4 Whorls of modified leaves within flowers?

Answer 4

1. Sepals
2. Petals
3. Stamens=
4. Carpels

Question 5

What are Stamens?

Answer 5

The anther + filament(male)

Question 6

What are carpels?

Answer 6

stigma + style + ovary (female)

Question 7

Where is the ovary located within plants?

Answer 7

ovary at base of carpel contains 1 or more ovules.

Question 8

What are Perfect flowers?

Answer 8

Contains both stamens & carpels, and therefore complete (= perfect) in Linnaeus’ opinion.

Question 9

What are imperfect flowers?

Answer 9

Flowers that contain either stamens or carpels

• hence a male (has only stamens) or a female flower (has only carpels)

Question 10

Species with imperfect flowers can be _________

Answer 10

Monoecious

Question 11

What does the root word “oikos” mean?

Answer 11

house.

Question 12

What is a monoecious plant?

Answer 12

A plant with male and female flowers on the same plant.

Question 13

What are Dioecious plants?

Answer 13

Plants that have male and female flowers on different female plants..

Question 14

What are flower modifed to attract and why?

Answer 14

They are modified to attract pollinators, providing them with food rewards.

Question 15

Are Non-Conifer gymnospersm or angiosperms more reliant on pollinators for reproduction?

Answer 15

Angiosperms

Question 16

What are the food rewards in flowers?

Answer 16

nectar or pollen

Question 17

What are fruit?

Answer 17

They are the mature Ovary containing seeds, being the container part of the ANGIOsperm.

Question 18

What are cotyledons?

Answer 18

Embryonic seed leaves that are present within the seed along with the Radicle

Question 19

What is a Radicle?

Answer 19

Embryonic root

Question 20

What is the basis of the subdivision of anthophyta into the groups called
Monocytla and Dicotyla?

Answer 20

The number of cotyledons within a seed.

Question 21

In angiosperm what is the megagametophyte called?

Answer 21

The Embryo Sac

Question 22

How many cells are within the Embryo sac?

Answer 22

7 cells, far less than the gymnosperm megagametophyte.