Te answer would be <span>C. "Some mutations can be contagious, like infections.</span>" Mutations happen regularly and are often so subtle that we do not notice them on a daily basis. Some of them, however, can indeed cause harm.
Estuaries are areas where fresh water from rivers meets salt water. As the river drains, it carries much nutrient-rich sediment. Many animal species depend on this food source to provide for their young.
Animal Types and Characteristics
Mammals:body covered by hair or furwarm-bloodedhave a backboneproduce milk
Reptiles:body covered by scalescold-bloodedhave a backbonemost lay hard shelled eggs on land
Birds:body covered by featherswarm-bloodedhave a backbonelay eggs
Insects:most are small air-breathing animals6 legs2 antennae3 body sections (head, thorax, abdomen)Spiders:also termed arachnids8 legs8 eyesthey spin webs
Aquatic Animals:most have gillsfound in lakes, rivers, and oceans
The fact that there is little diversity in the form of mc1r gene we can inferred that it is an that it is an advantageous trait to protect from extreme sun and lack of diversity is due to the negative selection.
- The MC1R gene give order for formation a protein called the melanocortin 1 receptor. This receptor plays very important role in normal pigmentation. The receptor is found on the surface of melanocytes, these cells secrete a pigment called melanin. Melanin is that the pigment that gives skin, hair, and eyes their colour.
- Negative selection works to get rid of deleterious alleles from a population in another term that describes this is often “purifying selection.”
- Positive selection leads to directional selection. Positive selection for a beneficial allele can increase the frequency of neutral variants neighbouring the beneficial allele; such genetic hitchhiking may end in a large area of homozygosity (i.e., loss of diversity during a large area of a chromosome) due to a highly advantageous mutation and is referred to as a selective sweep.
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