Answer:
The correct answer is c. redundant organs present in an organism, which have been functional in the organism’s ancestors.
Vestigial organ are those which are retained in the evolution however lost their original functions due to change living habits or surroundings of the organisms.
They serve as the evidence of evolution and help in evolutionary studies.
For example, vermiform appendix, nictating membrane of eye, ear muscle etc are vestigial organs found in humans.
Answer:
D
Explanation:
Only some organisms reproduce asexually, only plants perform photosynthesis, and most creatures consume oxygen and release carbon dioxide. D is the correct answer both by process of elimination and because the simplest life form is the single celled organism, which still has one cell. All complex life is made out of many many many cells.
Answer:
which cycle please.....I don't understand
Answer:
Tertiary structure.
Explanation:
The G protein coupled receptor gets activated and deactivated whether they bound to GTP to GDP. This coupling is important for the initiation of signalling cascades in the cells.
The hydrolysis of GTP to GDP is carried out by the enzyme GTPase. This causes the change in the tertiary structure of protein. The different subunits of G protein gets change due to the hydrolysis. This changes the tertiary structure of the protein and any change in the primary structure of protein is not reversible.
Thus, the correct answer is option (b).