Start by placing a living cell in a strong salt solution. When the plan cells are placed in the salt solution and it causes osmosis. Finally, water from the cell sap moves out.
Answer:
There are three types of DNA Mutations: base substitutions, deletions and insertions.
Base Substitutions. Single base substitutions are called point mutations, recall the point mutation Glu -----> Val which causes sickle-cell disease.
Deletions. ...
Insertions.
The four principles of natural selection are variability among members of a species, heritability of the variable features, differences in population members' ability to reproduce and survival of the fittest in terms of variability, heritability and reproduction. Natural selection is one of evolution's four mechanisms.
Natural selection acknowledges the fact that members of a population are capable of producing more offspring than are needed to maintain a healthy population size. Nature controls the population's size by empowering species' best specimens to survive and reproduce.
Variability among population members refers to differences in such traits as eye color or hair color, and it serves as natural selection's foundation. The variable traits must be heritable, which means they are passed down from one generation to the next. Differences among population members' ability to reproduce refers to the fact that some population members are able to reproduce and some are not. These three factors combine to help ensure the survival of the fittest, which means that the population members with the most desirable traits reproduce and create new members that share those traits, whereas members with undesirable traits fall into obscurity.
Answer:
<em>The correct options are:</em>
<em>There are million of spores that are made by a single plant to help keep its population.</em>
<em>Spores can live for a long time without maturing into an adult plant.</em>
Explanation:
Spores can be described as a means of reproduction in plants like the gymnosperms.
There are millions of spores produced by a single plant so that the chances of their dispersal and maturing into new plants is maximum.
Spores also have the capability to stay dormant until the conditions become favorable for the growth of a plant from the spore.
Another adaptation of spores is that they are light weight so that they can easily be carried away by the wind.
