Ans.
Testes and ovaries are male and female reproductive organs, respectively. These organs are similiar as testes produce male gametes or sperms by the process of spermatogenesis and ovaries produce female gametes or ova by the process of oogenesis.
These gametes fuse together to form zygote that develops into a multicellular organism. Thus, the correct answer is 'option A). both produce sex cells.'
Answer:
Water
Explanation:
Molecular oxygen is the terminal electron acceptor and serves to receive electrons from reduced NADH and FADH2 to reoxidize them. NADH and FADH2 are formed during glycolysis and Kreb's cycle. These reducing powers should be re-oxidized to enter in the first two steps of aerobic respiration again.
For the purpose, NADH, and FADH2 transfer their electrons to the molecular oxygen via electron transport chain. After accepting the electrons, molecular oxygen is oxidized into the water molecule. Therefore, radioactive oxygen isotope would appear in the form of a water molecule after completion of cellular respiration.
<span>they maintain the integrity of the cell membrane </span>
Pressure tightness and squeezing
Answer: Option D
Explanation:
None of the characters are true regarding bacteria and archaea. Both of the species have different composition of cell wall. The cell wall of bacteria is made of peptidocglycan and archaea's cell wall lack peptidoglycan.
Bacteria and archaea both are very diverse and are found in variety of environment. They both are found in the extreme environmental conditions.
Archaea and bacteria both are not derived from the eukarya. According to the endosymbiotic relationship the eukaryotes are developed from the prokaryotes.
hence, none of the statements are true.
