Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Biodiversity > Seed Plants > Flashcards

Seed Plants Flashcards

1
Q

What are the seed plants?

A

Gymnosperms and Angiosperms

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

When did they emerge?

A

360mya in the Permian

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is a seed?

A

Its embryo and food supply, surrounded by a protective coat

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

How have seed plants affected human society?

A

cultivation of cereal crops and domestication a massive cultural change, transformation to permanent settlers

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What are the derived traits of seed plants?

A

Reduced gametophytes, heterospory, ovules, and pollen

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is the evolutionary trend in gametophytes?

A

reduction in size, until microscopic in most seed plants

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What does a seed allow plants to do?

A

Reproduce and survive in a broader range of environments

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Where do gametophytes of seed plants live?

A

In the sporangia of the sporophyte

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What benefits come from gametophyte retained in the sporangia?

A

Moist reproductive tissue shield gametophyte from UV and can obtain nutrients from sporophyte

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is heterospory?

A

Megasporangia produce megaspores which give rise to female gametophytes and microsporangia produce microspores which gives rise to male gametophytes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is the integument?

A

layer of sporophyte tissue , envelops and protects the megasporangium

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

How many integuments are present in Gymnosperms

A

1

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

How many integuments are present in angiosperms?

A

2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is the ovule?

A

structure comprised of the megasporangium, megaspore and integument

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What happens inside the ovule?

A

a female gametophyte develops from a megaspore, and produces the eggs.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What does the microspore develop into?

A

A pollen grain, consisting of male gametophyte enclosed within the pollen wall

17
Q

What is pollination?

A

The transfer of pollen to the part of a seed plant that contains ovules

18
Q

What happens when the pollen grain germinates?

A

gives rise to a pollen tube that discharges sperm into the female gametophyte

19
Q

What did the evolution of the seed mean for reproduction?

A

No dependence on free water, could travel further distances to fertilise

20
Q

What happens after pollen fertilises the female gametophyte?

A

Ovule develops into a seed

21
Q

How does the seed coat form?

A

From the integument

22
Q

What are the benefits of the seed having food supply?

A

Can be dormant for a long time after being released from the parent, and can germinate under favourable conditions with food supply providing critical nutrients for growth

Biodiversity (24 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions