The simplest organisms are cells.
A cell is: The smallest structural and functional unit of an organism.
<span>Mitotic division produces diploid cells from diploid cells. So, if the parent cell has four chromosomes, then each daughter cell will also contain four chromosomes.</span>
Answer:
I would probably say (a) kinetochore microtubules
Answer:
In eukaryotes, 2 ATP molecules out of the total 4 produced in glycolysis are used up to transport the NADH molecule into the mitochondria.
Explanation:
- The glycolytic pathway in both eukaryotes and prokaryotes generates 4 ATP molecules and 1 NADH per glucose.
- In eukaryotes, the next step of cellular respiration, the Kreb's cycle takes place inside the mitochondria. 2 ATPs out of the initial 4 are used by NADH as they cross the mitochondrial membrane.
- The 4 ATP remain intact in prokaryotes as cellular respiration takes place in the cytoplasm and cell membrane.
- The conversion of 2 pyruvate molecules into Acetyl Co-A by the pyruvate dehydrogenase complex produces 2 NADH.
- Kreb's cycle produces 2 ATPs, 6 NADH and 2 FADH2.
- All in all, 10 NADH and 2 FADH2 molecules enter the Electron Transport Chain (ETC).
- Each NADH yields 3 ATP. Therefore, 10*3=30 ATP.
- Each FADH2 yields 2 ATP. Therefore, 2*2= 4 ATP.
- Therefore, the 4 ATP from glycolysis plus 34 ATP generated in the Kreb's cycle and the electron transport chain gives a total of 38 ATP.
The correct answer is: B received much rain to support a forest
Deserts are areas that receive very little precipitation, so the trees hardly grow on such places. Finding the fossils of tress in desert area shows us that there was a time when that place received precipitation in the form of rain which enabled the tree growth.
Finding the fossils helps us improve our geological and ecological understanding of the period millions of years ago.
