Potassium is just below the sodium in periodic table in s group !
so the valence electron of sodium and potassium is same and that is 1 !
Options for the question have not been provided. They are as follows:
A) somatic neurons in the spinal cord
B) the reticulospinal and vestibulospinal tracts
C) the vagus nerve and enteric plexus
D) the rubrospinal tracts
Answer:
C) the vagus nerve and enteric plexus
Explanation:
Enteric plexus or enteric nervous system is a part of autonomic nervous system and controls the gastrointenstinal (GI) tract. Vagus nerve is tenth cranial nerve and it innervates the enteric plexus. Both work together to control various functions of GI tract like peristalsis and gastric secretion. They release Gastrin-releasing peptide due to which the G cells of stomach are stimulated secrete gastrin. Gastrin in turn stimulates parietal cells of stomach to secrete gastric juice.
Negative directional selection
Negative directional selection is
a type of selection in which an extreme phenotype is favored over other
phenotypes and there is purging changes that cause deleterious impacts on the
fitness of the host. From the question given above, the smaller guppies are
favored over the larger guppies and this type of selection is negative
directional selection.
Answer:
Some of the organisms that can be found in pond water include:
- Arthropods.
- Bacteria.
- Protozoa.
- Hydras.
- Algae.
