The process that is not essential to the survival of an individual animal is reproduction process. Reproduction is not necessary for the survival of an individual organism, however it is very important to reproduce for the survival of the species.
Answer: Cell wall; plant cells have a cellulosic cell wall, which is absent in the case of animal cells. The plasma membrane serves as the outermost boundary for an animal cell. Chloroplast: The presence of chloroplast enables photosynthesis in plant cells and it is absent in animal cells.
Explanation:
Answer:
An increase in temperature increases the rate of evaporation and decreases the relative humidity of the environment. The more stomata on the leaf, the more water evaporates the leaf.
In addition to lowering carbon dioxide levels during photosynthesis, light can have a direct effect on guard cells, causing them to swell.
Answer:
40 chromosomes, 20 chromosomes, 2 chromatids, haploid
Explanation:
Mitosis is a type of cell division that results in two identical daughter cells with the same number of chromosomes as the parent cell. The fish is a diploid with 40 chromosomes (80 chromatids), after the separation of sister chromatids during the anaphase of mitosis, each sister chromatid becomes a chromosome i.e 40 chromatids (chromosome) each moves to the opposite poles and after the cell divides (cytokinesis), each daughter cell will have 40chromosomes each.
Meiosis is a type of cell division that results in four daughter cells with each having half of the parental number of chromosomes. It involves two divisions; Meiosis I and Meiosis II
In meiosis I, homologous chromosomes lie side by side to form a structure called tetrad or bivalent consisting of 4 chromatids. During anaphase I, 20 chromosomes are pulled apart to each pole with each chromosome containing 2 chromatids. After cytokinesis in meiosis I, each of the two cells will have 20 chromosomes (40 chromatids) i.e 1 chromosome = 2 chromatids
At the end of meiosis II, which is similar to mitosis, chromatids are pulled apart and each becomes a chromosome, meaning 20 chromatids will be separated to each pole and become 20 chromosomes in each cell after cytokinesis. Since the parental organism was a diploid with 40 chromosomes, and the resulting daughter cells now have 20 chromosomes each, it shows that the chromosomal number has been reduced by half. 2n ---- n
Diploid organism produce haploid daughter cells