Question
please help me with these
18) A(n ple of an organism exam asexually by at can som parthenogenesis, modo dragon C) human 19) ordinary cell division produces two daughter cells that are genetically identic division is important for all of the following functions ExCEPT 19 This type o A) production of sperm and egg B) ce acemen C) growth of a multicellular organism. asexual reproduction 20) A duplicated chromosome consists of two A) centromeres B) centrosomes C) sister chromatid D) genomes 21 21) Which of the following occurs during interphase? A) Sister chromatids separate. B) Chromatin becomes tightly coiled C) Chromosome duplication occurs D) The mitotic spindle forms 22) 22) The mitotic cell cycle results in the production of A) four cells, each with the same amount of genetic material and the same genetic information two cells, each with the same amount of genetic material but with different genetic information C) four cells, each with the same amount of genetic material but with different genetic information d the same genetic information D) two cells, each with the same amount of genetic material an 23) Which of the following occurs during prophase A) Sister chromatids separate. B) Chromosomes line up on the midline of the ce C) The nuclear envelope forms. D) The mitotic spindle begins to form 24) 24) The CORRECT sequence of stages of mitosis is A) prophase, metaphase, anaphase, telophase B) interphase, prophase, metaphase, anaphase, telophase C) anaphase, interphase, prophase, metaphase, telophase D) telophase, prophase, anaphase, metaphase 25) 25) During metaphase, A) sister chromatids separate B) the nuclear envelope breaks up C) chromosomes line up in the middle of the cell D) centromeres divide 26 A cell that completed the cell cycle without undergoing cytokinesis would 26) A) have two nuclei B) have its chromosomes lined up in the middle of the cell C) have less genetic material than it started with D) not have completed anaphase
Explanation / Answer
18. correct option would be "B". komodo dragon is the best option as Parthenogenesis is a type of asexual reproduction in which the offspring comes from a unfertilised egg.It will be b as its common in reptiles and is shown by species which are endangered species.Parthenogenesis is also shown by endangered species
19."A" would be the correct option as only sperm and egg cells have an exception of having half the chromosomes than the usual number, for humans, it is 23 whereas all other cells have 46 chromosomes.Moreover, our sperm or egg cells needs to be diverse.
20.correct option is "C". Each duplicated chromosome consists of two sister chromatids, which contain identical copies of the chromosome’s DNA
21.correct option "c". This happens in the s phase of the interphase in which cell copies DNA molecule of each chromosome.
22. correct option "D" As mitosis produces two identical diploid sex cells.
23.correct option "D" .After interphase, this is the first process of mitotic cell division.NOTE hear option c is incorrect as nuclear envelope is not fully formed
24.since the question is only talking about mitosis correct option is"A"
