I need people very educated in biology or in the reproductive system of humans but mainly plants?

Question

I am studying for a final exam and can not this is list of information

What is the algae ulva called after sexual reproduction?

Why does the sporophyte of mosses remain attached to the gametophyte?

What is contained inside the follicles in the ovaries of human females?

What is the difference between vivparous, oviparous, and ovoviviparous and describe each.

Wh dont reptiles lay eggs in water?The moss gametophyte develops directly from what structure

Answer 1

1) After sexual reproduction ulva produces a carposporophyte which is semiparasitic on the female gametophyte.

2) The sporophyte generation only has a limited chlorophyll supply therefore it cannot produce a lot of sugars for energy. On the other hand, the gametophyte is very rich in chlorophyll and produces excess sugars. The sporophyte takes an advantage of the excess sugars of the gametophyte. It acts semi-parasitically on the gametophyte and uses the excess sugars for spore production. Without the gametophyte the sporophyte would obtain enough energy and water.(because the sporophyte also lacks rhyzoids)

3)Check these links http://en.wikipedia.org/wiki/Ovarian_fol...

http://www.acs.ucalgary.ca/~browder/ooge...

http://it.stlawu.edu/~mtem/devbiol/36c89...

http://www.octc.kctcs.edu/gcaplan/anat2/...

they are very informative

4) Viviparous development is like that of humans.  The offspring develops directly inside the female and obtains food via the placenta. Once fully developed it is given birth to directly. No egs are involved.

Oviparous involves the laying of eggs. Little or no development occurs in the femals. In fact development is carried outside the female and care must be taken to keep eggs safe and protected.

Ovivivapourous animals develop within eggs that remain within the mother's body up until they hatch or are about to hatch. It is similar to viviparous develoment but embryos are nourished by egg yolk instead of given food by the placenta.

5) Reptiles possess an egg known as the cleidoic egg. It is porous (having extremely small and microscopic pores) and allows gas exchange through the shell. Laying the eggs in water will slow or even stop the process of gas exchange into and out of the egg. Therefore harmful CO2 will accumulate and eventually will kill the offspring. Slight osmosis into the egg might also occur especially is tiny cracks are present.

6) The moss gametophyte develops directly from spores (here's 2 links http://taggart.glg.msu.edu/bot335/Mosslc... http://en.wikipedia.org/wiki/Moss )

Hope I helped!!