It is the Iris I believe. It controls the diameter and size of the pupil, controlling the amount of light reaching the retina.
Answer: Option D
The peroxisome functions in macromolecular biosynthesis and breaks down fatty acids and other organic compounds.
Explanation:
Peroxisome are cellular organelles that play roles in metabolic process such as oxidation of lipids to yield simple products of carbon dioxide and water.
It also helps in the synthesis of biotin, a vitamin that activates many enzymes catalysing several cellular reactions.
Answer: D. Making a prediction
Answer: DNA
Explanation:
mRNA is the complement of the DNA template strand. Transcription (process that makes mRNA) requires DNA and nucleotides (A,U,G and C)
Polyploidy (more than two complete sets of chromosomes) is not rare among plants. For example, pollen grains may reach female flowers via animals or wind. In some cases, pollen grains from species with 4 complete sets of chromosomes will have 2 sets of chromosomes. Pollen grains may fuse with a female reproductive organ with 1 set of chromosome (so, female plant must have 2 sets of chromosomes). The resulting zygote will have 2 + 1 sets of chromosomes, so the plant will have 3 complete sets of chromosomes.
