Answer:
Cellulose-digesting microorganisms live in the guts of termites and ruminant mammals. the microorganisms have a home and food, and their hosts gain more nutrition from their meals. this relationship is an example of mutualism.
Explanation:
Mutualism encompasses the ecological relationships between individuals of different species, in which both gets benefits and improve their biological functions. It usually occurs between species that have different nutritional and living requirements.
An example of this is also the nitrogen fixing bacteria (Rhizobia) and the legimunous plants, and the relationship between the Acacia and the Acacia ants.
Relaxin
<span>Relaxin, secreted by the corpus luteum of the ovary as well as the placenta, is responsible for helping to inhibit uterine activity and to soften the cervix and the collagen in joints. Softening of the cervix allows for dilatation at birth; softening of collagen allows for laxness in the lower spine and so helps enlarge the birth canal. The effect of estrogen is to cause breast and uterine enlargement. Progesterone has a major role in maintaining the endometrium, inhibiting uterine contractility, and aiding in the development of the breasts for lactation. Human placental lactogen (hPL), also known as human chorionic somatomammotropin, serves as an antagonist to insulin, making insulin less effective, thereby allowing more glucose to become available for fetal growth.</span>
Answer:
Option (e).
Explanation:
Meiosis may be defined as the process of cell division in which a single parent cell divides into four daughter cells. The chromosome number reduces to half in meiosis.
Crossing over is the process of exchange of genetic material between the homologous chromosomes of the non-sister chromatids. Crossing over will bring variation in the gametes. Hence, the absence of crossing over results in the formation of gametes with less genetic variation.
Thus, the correct answer is option (e).
