The key difference between microspore and pollen grain is that microspore is the small spore that develops into the male gametophyte in plants while pollen grain is the small grain that contains the male gametophyte.
D) All of above
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The answer is ATP production glycolysis, Krebs cycle, and electron transport aerobic in that order. Glycolysis occurs in the cytoplasm while the other two stages occur in the mitochondria (Krebs cycle in the mitochondrial matrix and the electron transport chain in the mitochondria membrane).
The answer is Autotrophs. Examples of autotrophs are plants and photosynthetic bacteria (photoautotrophs). They convert abiotic factors such as light to organic molecules. These also include chemosynthetic bacteria (chemoautotrophs) that elements such as sulfur dioxide and methane in hydrothermal vents to organic molecules.
Answer:
The correct answer is option b, that is, enteroendocrine cells.
Explanation:
The specialized cells of the pancreas and the gastrointestinal tract exhibiting endocrine function are termed as enteroendocrine cells. These cells generate gastrointestinal peptides or hormones in response to a distinct kind of stimuli and discharge them into the bloodstream for the systemic effect. These are the most varied endocrine cells found within the body.
The intestinal enteroendocrine cells produce somatostatin, cholecystokinin, motilin, enteroglucagon, and neurotensin hormones. The G cells present within the intestine produce gastrin. In the gastric glands, the gastric enteroendocrine cells are present, which produce histamine, and others like cholecystokinin, alpha and gamma-endorphin, somatostatin, and others.
In the islets of Langerhans, the pancreatic enteroendocrine cells are present, which produce hormones like ghrelin, amylin, somatostatin, and pancreatic polypeptide.
