Answer:
a) Mitotic metaphase
8 picograms
b) a primary oocyte (metaphase)
8 pecograms
c) a secondary oocyte (metaphae)
4 pecograms
d) a first polar body (metaphase)
4 pecograms
Explanation:
a) In mitotic phase the chromosome numbers remains same as 8 because in this phase duplicated chromosomes align in center and separate to other poles. Therefore the amount of DNA will be 8 pecograms.
b) after the mitotic meta phase the cells divide into daughter cell with equal proportion of DNA which means each cell have 8 chromosomes. therefore they both contain 8 pecograms of DNA. The new daughter cells called as primary oocytes.
c) These primary oocytes (8 chromosomes) divides into two secondary oocyte each contain 4 chromosomes which means each cell have 4 pecograms of DNA.
d) Duplication of chromosomes occur in secondary oocyte and cell divides into polar body (4 chromosomes) and ovum (4 chromosomes). Therefore first polar body have 4 pecograms of DNA in it.
See the attachment for clarification.
Answer:
the factors that a cell considers when deciding whether or not to move forward through the cell cycle. These include both external cues (like molecular signals) and internal cues (like DNA damage).
Explanation:
Answer:
C, All plants are made of cells, but only certain types of animals are.
Explanation:
In biology, Cell Theory is the historic scientific theory that is now universally accepted, that all living organisms are made up of cells and that cells are the basic structural / organizational unit of all organisms, and also the basic unit of reproduction.
In this question, it asked which does NOT form part of cell theory, and the answer to that is C, since "all plants are made of cells, but only certain types of animals are" isn't true to the cell theory, because the cell theory basically says that ALL living organisms are made out of cells, and that means ALL plants and ALL animals.
Hope this helps :)
A predator, prey, carnivore
Most canyons were formed by a process of long-time erosion from a plateau or table-land level. The cliffs form because harder rock strata that are resistant to erosion and weathering remain exposed on the valley walls