-
What are the five main characteristics of seeds and seed plants?
- 1 produce pollen grains
- 2 all seeds have stored food for the embryo
- 3 all seeds have seed coat
- 4 alternation generations
- 5 heterosporus
-
What is heterosporus?
produces two types of spores
-
What are examples of conifers?
Pine, spruce, fir
-
Parts of the male reproductive structures.
Cone, Pollen, Microsporophyll, Microsporoangium(pollen sacs)
-
How many microsporangia are in one microsporophyll?
2 microsporoangia per microsporophyll
-
How many cells make up the pollen grain?
- 1 generative cell
- 1 tube cell
- 2 prothallial cells
-
How many ovules are there per ovuliferous scale?
2 ovules
-
Female parts of a conifer.
sterile bract, ovuliferous scale, ovule, integument, microphyle, megasporangium, archegonia, egg cell, egg cell nucleus, female gametophyte, integument
-
In pines, what does the megasporocyte develop into?
four haploid megaspores; one survives, the other three die
-
What does the surviving megaspore develope into?
the female gametophyte
-
The growing embryo gets its nutrients from what energy source?
the female gametophyte
-
From what structure does the seed develop?
the ovule
-
How old is the cone that contains the mature seed?
2 year old cone contains the mature seed
-
Parts of a young pine seedling.
hypocotyl-root axis, cotyledons, leaves
-
From what part of the seed did the seedling develope?
the embryo
-
Are Cycads dioecious or monoecious?
dioecious
-
Are pines monoecious or diecious?
monoecious
-
What is the shape of a Ginkgo tree leaf?
fan-shaped
-
Why are female ginkgos not usually used as ornamentals?
they stink
|
|
