B
Every living thing makes energy through respiration and plants use solar energy during respiration.
Answer: Autocrine signal, paracrine signal and endocrine signal.
Explanation:
Testosterone is an example of hormone which shows its effect on different locations of the cells.
The autocrine signal can be defined as the siganals which shows its effect on the cell from where it is being produced. This means a cell targets itself.
Then comes the paracrine signals in which signals acts locally on the cells nearby it. The cells close together to the cells producing chemical signals is being affected.
The endocrine signals can be defined as the effect of the hormone on the distant cells. The signals is produced by the cells somewhere else but is carried through the bloodstream to the distant cells.
All of the three effects is being shown by testosterone autocrine, endocrine and paracrine.
Answer:
A sperm cell
Explanation:
A diploid cell has 46 chromosomes which is normally signified by somatic cells. Germ cells or gametes are haploid cells therefore they contain only 23 chromosomes. Male gamete contains 22 autosomes and one sex chromosome. That sex chromosome can be X or Y.
Female gamete does not have Y chromosome as a sex chromosome, it has only X chromosome as a sex chromosome. So Y chromosome in a human cell which have 22 autosomes determines that it is a male gametic cell or a sperm cell. Sperm cells that have a Y chromosome if fuses with female gamete produce male offspring(XY).
So the correct answer is- a sperm cell.
Answer: dandelion is consumed by bees, grasshoppers, and butterflies.
Answer:
requires an intermediate found in urea biosynthesis
Explanation:
Both pyrimidine and urea are carbon and nitrogen containing compounds. Carbamoyl phosphate provides both carbon and nitrogen in biosynthesis pathways of both pyrimidine and urea. Hence, it is an intermediate in both the pathways.
In urea biosynthesis carbamoyl phosphate provides its carbamoyl group to ornithine. In pyrimidine synthesis it donates the carbamoyl group to aspartate. Carbamoyl phosphate synthetase synthesizes carbamoyl phosphate by joining ammonium ions to carbon dioxide and adenosine triphosphate.
