Chapter 19 - Biodiversity of Plants

Question 1

What are some common uses of plants?

Answer 1

• Food
• Clothing
• Medicines (biggest use)
• Fuel
• Building material (wood)

Question 2

How many species of vascular plants are there and how many are flowering plants?

Answer 2

391,000 species of vascular plants

94% and flowering plants: 369,000

Question 3

How many new species of plants are discovered every year?

Answer 3

Approx. 2000 species a year

Question 4

Alternation of generations

Answer 4

When a plants lives part of its life in a haploid gametophyte generation, and the other part in a diploid sporophyte generation.

Question 5

Xylum

Answer 5

Vascular tissue composed of dead cells that pull up water from the roots.

Question 6

Phloem

Answer 6

Living vascular tissue that distributes sugars throughout the plant.

Question 7

When did the first vascular plants arise?

Answer 7

425 million years ago

Question 8

When did the first seed plants arise?

Answer 8

360 million years ago

(Carboniferous period)

Question 9

When did the angiosperms arise?

Answer 9

140 million years ago

Question 10

When did the first land plants arise?

Answer 10

475 million years ago