The following statements refer to cyclins: i. cyclins protein levels are constant throughout the cell cycle, but activity varies with the phase of the cell cycle. ii. cyclins have measurable enzymatic activity that oscillates with the cell cycle. iii. cyclins are ubiquitinated and degraded at specific phases of the cell cycle. iv. cyclins bind to cdks. v. cyclins are g proteins. which of these statements are true?

During the process of meiosis, special cells called gametes are formed. gametes only have half the number of chromosomes that the other cells in the body have. what form of reproduction do organisms that produce gametes use?

If an organ has six haploid chromosomes, how many chromosomes are present. 6 12

Which of the following statements is correct in hour our immune system responds to a potential pathogen? a. the adapted immune system will call on the innate immune system to destroy the pathogen. b. b cells will start reading the antigen code immediately and call t cells to assist in destroying the pathogen. c. the skin will be the first line of defense, and then the many phagocytes in the bloodstream will attempt to consume the possible pathogen. d. the t-cells in the adapted immune systems are the first to recognize the pathogen vaccines are weakened forms of disease causing microorganisms, which are given to patients to prevent disease. after the vaccine is administered, the immune system responds by creating a(n) to recognize the a. antigen, antibody b. antibody, antigen c. antibody, antibiotic d. antibiotic, antibody