Answer:
As carbon dioxide concentrations increase, so too does the rate of photosynthesis until a certain point where the graph levels off. At lower carbon dioxide concentrations carbon dioxide is the limiting factor because an increase in carbon dioxide causes an increase in photosynthesis.
Explanation:
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The Biosphere, is the layer of the planet Earth were life exists.
Answer:
animals such as bees, squirrels, songbirds, and even humans. Nocturnal animals sleep during the day, and move about at night. These include animals such as moths, bats, frogs, and cats. Artificial light affects both, but in different ways.
Answer:
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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