Answer: D - Mutations occur randomly through changes in DNA.
Explanation:
Mutations can result from DNA copying mistakes made during cell division, exposure to ionizing radiation, exposure to chemicals called mutagens, or infection by viruses. Germ line mutations occur in the eggs and sperm and can be passed on to offspring, while somatic mutations occur in body cells and are not passed on.
Answer:
The thalamus of the brain functions in this analogous manner.
Explanation:
The thalamus (dorsal and ventral thalamus) is a structure located in the forebrain, at the base of the cerebrum. It acts as a relay center with nerve fibers project out to the cerebral cortex in all directions.
The thalamus is mainly made up of gray matter and contains a small amount of white matter. The grey matter, which is divided into the anterior part, medial and dorsal part contains several nuclei that interconnect brain activity between different areas of the brain. The anterior part contains anterior thalamic nuclei, medial part contains dorsomedial nuclei and the lateral part contains dorsal tier and ventral tier nuclei. Interlaminar nuclei
, reticular nuclei, medial geniculate body
, lateral geniculate body, etc are other nuclei present in the thalamus.
The thalamus receives sensory information from the various receptors in the body. It relays this sensory information to the cerebral cortex, where it is interpreted as pain, touch, temperature, etc. The various functions of thalamus include the integration of sensory information, emotional control, motor control, integration of sensations with emotions, regulation of consciousness, sleep, and alertness.
They are not affected by the gene because a normal haemoglobin content in the red blood cells ensures that enough oxygen is transported throughout the human body
Answer: C
Explanation: denitrifying bacteria, microorganisms whose action results in the conversion of nitrates in the soil to free atmospheric nitrogen, thus depleting soil fertility and reducing agricultural productivity.
Explanation:
<h2>In the given options, marble , limestone, and baking soda are all either metal carbonates or bicarbonates All these when react with a dilute acid then they produce carbon dioxide. Whereas lime which is calcium oxide when react with a dilute acid then they do not produce carbon dioxide.</h2>