Answer:
Tne most basic reason that cells ate stained is to enchance visualization of the cell or certain cellular components under a microscope.Cells may be also be stained to highlight metabotic processesor to differentiate between live and dead cells in a sample
hope it helps,and have a lucky day....
What Artists and Scientists have in Common. ... I guess it is common knowledge that analytical scientists and creative artists are on opposite sides of a spectrum. But are they so different? Artists and scientists both have to be creative: they both have to develop original ideas and push frontiers.
A. DNA molecules, I think
<span>D. must rely on other means than photosynthesis.
</span>Because sunlight is inadequate at the bottom of the sea, photosynthesis cannot take place. There are no plants and food is scarce; usually decaying matter from dead organisms. Organisms in the bottom of the sea relies on chemicals from hydrothermal vents to create their own food through chemosynthesis.
Fertilization is done by germination of pollen on the pistil, without need of moisture as in the case of ferns (character they share with other Spermaphytes).
In Angiosperms fertilization has three essential characteristics:
* it is siphonogamous: the apertured pollen grain possessing two or three cells sees its vegetative cell germinate and form a pollen tube which will convey, with the help of its cytoskeleton, the male gamete (case of the tricellular pollen) where the generating cell ( case of the bicellular pollen) which will carry out its second division of meiosis. In this siphonogamy corresponds to a total franking of water for fertilization.
* it is anisogamous: the female gamete is by far the most massive of the two (the pollen grain is often very dehydrated, the cells it contains have a very small cytoplasmic space).
* it is double: the male gametes conveyed by the pollen grain will merge their nuclei (caryomixis) with those of two different cells. It's a special function for the reproduction of angiosperms. The pollen grain contains two nuclei (all haploids), whereas for example the mammalian spermatozoa contains only one.
