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Polen
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∙ 11y ago
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Are jelly fish sexual or asexual?
Stingrays are sexual, they mate during their matting season
How do tree ferns reproduce?
Ferns have sexual mode of reproduction. Also ferns can only reproduce where there is sufficient moisture to transfer their motile male gametes to the archegonia for fertilization. Mainly ferns are reproduced by spores and at a time in the year they grow small spots under their leaves, known as sori. Each sorus has several sporangia where spores (micro & megaspores) are produced. Sexual reproduction in ferns takes place by spores in sporophytic phase and by reproductive organs i. e. anthredia and archegonia in gametophytic phase. Thus, the reproduction in ferns is achieved by alternation of generation.
Is annulus gametophyte or sporophyte?
Well, all plants have both a sporophytic and gametophytic phase. For ferns, the dominant phase we often see are usually the sporophytes. Ferns have free-living gametophytes, but are often small and thus goes unnoticed.
Which phase does a cell membrane pinches together?
Asexual reproduction
What is a unique feature of ferns in comparison with angiosperms?
Ferns lack the flowers or seeds of the angiosperms. Instead they reproduce by forming spores in two phases, the sporophytic and a gametophytic phase. The second, gametophytic, phase is actually a free-living organism, not a seed.
When is DNA replicated in a cells?
During S phase :)
What is Erythrocytic schizogony?
It's the asexual phase in the malaria life cycle that takes place in the liver.
Why are you given an hcg injection after embryo transfer?
It helps the ovaries produce more progesterone during the embryonic implantation phase.
Why do not action potentials occur during the repolarization phase?
It has to do with what types of channels are open during this phase. In the repolarization phase the number of potassium channels are increased and the number of sodium channels are decreased. This allows for action potentials to not occur. Otherwise, the action potentials would add up and produce tetany.
What is pre-erythrocytic Schizogony?
It's the asexual phase in the malaria life cycle that takes place in the liver.
What is the function of Thyristor module in inverters?
Usually these devices will conduct during an AC phase cycles to charge a capacitor to produce DC.
What do ferns rely on the sexual reprodution?
They both use spores!
