B- A person sweating on a hot day
(their body is cooling them off to remain balanced)
Answer:
256520
.........hope this helps!!!.............
As cells increase in size, the surface area and volume do not usually increase proportionally to length. The greater the diameter of a single-celled organism, the lower the surface area to volume ratio. It is this relationshipthat restricts the size of a particular cell.
Answer:
A
. the fertilized egg and the cells produced by the first few cell divisions
Explanation:
Totipotent cells are those cells in developmental stage of multicellular organisms which can give rise to any part of the organism. It can give rise to both the placenta and the embryo.
After the fertilization, the cells produced in first few divisions are totipotent. This stage is also called as morulla stage. Once blastocyst stage is reached, totipotency is lost. All the cells of blastocyst are not totipotent. The inner cell mass of blastocyst is pluripotent which means it can give rise to the entire embryo except placenta. The trophoblast layer of blastocyst can only produce placenta.
The answer should be D.) Each chromosome contains a single, tightly wound DNA molecule
