Lab Ex 30 Survey of the Plant Kingdom - Gymnosperms

Question 1

Cones

Answer 1

strobili; exposed seeds are borne on these scalelike structures

Question 2

Heterosporous

Answer 2

produce 2 types of spores

Question 3

Microspores

Answer 3

occurs in male cones; form male gametophytes

Question 4

Megaspores

Answer 4

occur in female cones; form female gametophytes

Question 5

Microsporophylls

Answer 5

in conifers, sporophylls of male cones are called this

Question 6

Microsporangium

Answer 6

on the surface of each microphyll is a layer of cells called this; produces spores

Question 7

Megasporophylls

Answer 7

sporophylls of female cones

Question 8

Megasporangia

Answer 8

each megasporophyll produces spore-producing these

Question 9

Microspore mother cells

Answer 9

a microsporangium produces diploid these, which undergo meiosis to produce microspores

Question 10

Microspores

Answer 10

develop via mitotic divisions into microgametophytes called pollen grains

Question 11

Pollen grain

Answer 11

each one of these consists of 4 nuclei and a pair of bladderlike wings

Question 12

Megaspore mother cell

Answer 12

each ovuliferous scale of the female cone bears 2 megasporangia, each of which produces a diploid one of these; each undergoes meiosis to produce a megaspore

Question 13

Megaspore

Answer 13

develops via mitotic divisions into a megagametophyte

Question 14

Megagametophyte

Answer 14

end result of a megaspore dividing mitotically

Question 15

Nucellus

Answer 15

tissue immediately surrounding the megagametophyte

Question 16

Integuments

Answer 16

surrounds the nucellus

Question 17

Ovuliferous scales

Answer 17

analogous to microsporophylls of staminate cones, but these are modified branches rather than modified leaves