C. Telomerase will ensure all the genes will not lost during replication
<span>The answer is progesterone. This hormone is important in maintaining pregnancy. It is produced by the ovaries (</span>corpus luteum<span>) in the early stages of pregnancy before the placenta takes over. Progesterone ensures the walls of the uterine remain thickened hence prepare for implantation</span>
Answer:
This question lacks options, the options are;
A. All cells have a cell wall.
B. All cells arise from pre-existing cells.
C. All cells are capable of photoshynthesis.
D. All cells can develop into any other type of cell.
The answer is B.
Explanation:
The widely accepted universal cell theory is known to be contributed to by three scientists viz: Matthias Schleiden, Theodor Schwann and Rudolph Virchow.
As rightly stated in this question, Botanist Mathias Schleiden and Zoologist Theodor Schwann proposed that plants and animals are made up of cells in the year 1838 and 1839 respectively. However, in 1855, biologist Rudolph Virchow expanded the cell theory by adding that all living things are composed of cells and that these cells arise from pre-existing cells.
The collaboration of these three scientists brought about the cell theory that states:
* Cells are the basic unit of all living things.
* All living things are made up of one or more cells.
* All cells arise from pre-existing cells.
I think the answer is C) human activity
Answer – B.
One of the two main functions of
the nuclear envelope is to allow separation of DNA from cytoplasm machinery. The
other main function of the nuclear envelope is the regulation of contents that
move in and out of the nucleus through small holes called nuclear pores. The nuclear
envelope is sometimes referred to as the nuclear membrane.
