Lab 3

Question 1

Between what years was the single ancestor of all land plants alive?

Answer 1

470 and 430 MYA

Question 2

What adaptations did plants created to water scarcity?

Answer 2

• Cuticle
• Stomata
• Spores
• Vascular Tissue

Question 3

The Green Plant clade

Answer 3

*all photosynthetic organisms that contain chloroplast
*chloroplasts are derived from a single endosymbiotic event
*have chlorophyll A and chlorophyll B
*ability to manufacture starch as the carbohydrate food-storage molecule

Question 4

Embryophytes

Answer 4

*land plants
*named for their ability to retain and protect an embryo within maternal tissues

Question 5

What do all land plants life cycles involve?

Answer 5

Sporic Meiosis

Question 6

Sporic Meiosis

Answer 6

produces haploid spores that grow into multicellular haploid plants

Question 7

Gametophytes

Answer 7

plants in the multicellular haploid phase that produces gametes

Question 8

Sporophytes

Answer 8

*produces spores via meiosis
*diploid plants

Question 9

What is the life cycle of land plants known as?

Answer 9

alternation of generations

Question 10

Sexual Reproduction in land plants

Answer 10

*More efficient reproduction
*sporic meiosis (alternation of generations)
* protect the embryo in
maternal tissue (Embryophytes)
* Seeds and flowers

Question 11

Chlamydomonas

Answer 11

(Chlorophyte)