Answer:
The answer is A.
Explanation:
Moth with dark wings under the tree with dark bark have a higher chance of surviving as its wings protect them from predator due to similar colour features.
Answer:
In humans, genetic variations are caused because humans reproduce by a sexual life cycle which is termed as meiosis. In such a life cycle, the offspring receives half the chromosomes from the mother and half from the father. Crossing over and random assortment of chromosomes are two phenomenons which occur during meiosis. Due to these two phenomenons, genetic variations are caused.
During crossing over, the exchange of DNA segments between the homologous chromosomes takes place which brings about the genetic variations.
It is called the Rugae.
Rugae is a term used in anatomy to refer to a series of ridges produced by folding of the wall of an organ. For example the gastric rugae which allows for expansion of the stomach after the consumption of foods and drinks. The rugae of the vagina are the transverse ridges on the mucous membrane lining the vagina. They allow the vagina to stretch during childbirth.
Answer:
a. salivary amylase
Explanation:
salivary amylase breaks down starches (complex carbohydrates) into sugars for the body to absorb more efficiently.
Answer:
B
Explanation:
soil being depleted to nitrogen due to high runoff
