Topic 10- evolution of seed plants

Question 1

seed plants are called

they’re ___dominant and ____ dependent

Answer 1

gymnosperms

sporophyte, gametophyte

Question 2

list 3 advantages to being sporophyte dominant

Answer 2

• need for water: sporopollenin protects gametes( pollen) from desiccation
• protect developing embryo
• diploidy can be better (diploid cells can respond to varying environmental conditions better than haploid cells can)

Question 3

pollination =

pollen grains are coated in

Answer 3

transfer of pollen to the part of a seed containing the ovules
sporopollenin

Question 4

___spores make female gametophytes and ___spores make male gametophytes

Answer 4

mega= female

micro-male

Question 5

in seed plants, the entire male gametophyte is carried inside the

Answer 5

pollen grain

Question 6

main source of variation in seed size?

Answer 6

amount of gametophyte derived food

Question 7

the ____ the seed, the less likely it is to survive in the absence of resources

Answer 7

smaller

Question 8

define heterospory and give an axample

Answer 8

megasporangia and microsporangia (on same or different trees)
ex. pine tree (gymnosperm)

Question 9

a mature pine tree (any gymnosperm) is _n and ___

Answer 9

2n

sporophyte

Question 10

angiosperms underwent a huge ___ ___ in the cretaceaous period (decline in gymnosperms)

Answer 10

adaptive radiation

Question 11

monoecious vs dioecious

Answer 11

monoecious = male & female flowers on same individual plant
dioecious = male & female flowers on different plants

Question 12

there is a _____ relationship between flowering plants and their pollinators

Answer 12

co-evolutionary