Photosynthesis is the process where plants turn the sun's energy into food for the plant. It is like the human's process of cellular respiration.
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Steps are required for a pathogen to infect a novel host species.
- A pathogen is defined as an organism causing disease to its host, with the severity of the disease symptoms referred to as virulence.
- The pathogens can be viruses or bacteria. If the host is humans then these pathogens can enter through nose, sputum, yes or any cut wounds.
- After entering the host species, the pathogens ejects its genome into the cell of the host for its multiplication. Such type of organisms require the machinery of the host to multiply.
- The pathogens after multiplying, increases in number and damages tissues and organs of the host thereby causing diseases.
The result of meiosis is that the offspring will have no genetic variation, which means that it has less of chance for surviving changes to the environment. What happens to the chromosomes is that they duplicate and homologous chromosomes exchange genetic information (chromosomal crossover) during the first division, called meiosis I. The daughter cells divide again in meiosis II, splitting up sister chromatids to form haploid gametes.
<span>No, DNA can be extracted from many types of cells.</span>
Genetic variation is a prerequisite for evolution because natural selection relies upon lessening the frequency of alleles in a population therefore there must be variance in the gene pool
