Answer: a. Genetically significant dose
Explanation:
Genetically significant dose is the index of radiation that is received by the genetic pool. It determines the progeny of the given population. This can be achieved by weighting the individual dose of the gonads that is received by the x-ray examination or ionization imaging by the individuals being examined also by the contribution of those persons to the expected number of children to be born in future.
It represents an estimate of the genetic significance of gonad radiation doses.
<span>Looking at the two species' DNA would be a good place to start. If there are a number of similarities in their genotypes, then there would be a good chance that the two would also share some type of a common ancestor. This would be evidence that there was some type of selection that took place that necessitated two different species that shared a number of traits and features.</span>
The correct answer is:
(D) enzyme linked receptor
When non-nerve cells become involved in response to signals, the type of receptor that goes into action is the enzyme linked receptor.
Explanation:
An enzyme-linked receptor, also identified as a catalytic receptor, is a trans -membrane receptor, where the adhesive of an extracellular ligand produces an enzymatic action on the intracellular side. Hence a catalytic receptor is an integral membrane protein containing both enzymatic catalytic and receptor functions.
Answer:
b. The individual's' genetic composition
Explanation:
Natural selection is an occurrence in nature in which organisms with genes that have mutated to adapt to certain ailments, survive better than their mates. J.B.S Haldane made a hypothesis that this phenomenon of natural selection accounted for why people in Africa had developed resistance to malaria. Their hemoglobin, proteins, and other compounds that are necessary for the function of the red blood cells had been modified so that they would not easily be infiltrated by malaria parasites.
A.C. Allison confirmed this in his experiment which showed that people who had sickle cell mutations in the gene, beta hemoglobin were mostly found in regions where malaria was prevalent. Their genes had also been modified such that they were resistant to malaria.
Answer: The diagram attached is known as the nephron,it is labelled from A to E, the structure labelled E which is known as the COLLECTING DUCT can be influenced by hormones to change the concentration of urine.
Explanation: Antidiuretic hormone ADH is one of the hormones that is produced by the anterior lobe of the pituitary gland of the endocrine system,this antidiuretic hormone performs certain functions of which one is that it helps to increase the rate and amount of water that is reabasorbed in the distal convulated tubule of the nephron during the second stage of urine formation,when these water are reabsorbed,the urine being produced becomes more concentrated and there is a further reduction in the volume/quantity of urine produced.
When this volume of urine is decreased/reduced, plasma osmolarity increases in reaction to the decreased volume of urine.
Urine are also reabsorbed in the collecting duct.
