I believe the answer is sunlight
B. Eukaryotic cells
Humans are categorized as eukaryotic organisms.Which means that all human cells can be found with a nucleus. Eukaryotes can found in things like the brain, the heart,the muscles,and such more.
Answer:
a. glycolysis—preparatory reaction--cirtric acid cycle--electron transport system
Explanation:
- Glycolysis is the first stage of cellular respiration that occurs in the cytoplasm of the cell. During glycolysis one 6 carbon glucose is converted into two molecules of 3 carbon pyruvic acid or pyruvate.
- In the preparatory reaction, the pyruvate converted into a two-carbon molecule called acetyl CoA. In this reaction, a carbon dioxide molecule is released and a molecule of NADH is released.
- The citric acid cycle begins with the reaction of the acetyl CoA with a four-carbon molecule in the mitochondrisl matrix. It goes through a cycle of reactions regenerating the four-carbon starting molecule. ATP, NADH and FADH₂ are produced.
- The electron transport system is the terminal step of aerobic respiration that operates on the inner membrane of the mitochondria. Reduced coenzymes NADH and FADH₂ move along electron transport system release high-energy electrons and produce ATP.
D) <span>an increase in tree cover in the tundra</span>
The answer is symplastic transport. Transport of phytohormones
such as cytokinins occurs through cytoplasm
from cell
to cell through plasmodesmata. Cytokinins travel up
the xylem and promote lateral growth. Gaseous molecules, such as
ethylene, emitted and received by plants must pass the apoplast.
