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A nonconformity exists between sedimentary rocks and metamorphic or igneous rocks when the sedimentary rock lies above and was deposited on the pre-existing and eroded metamorphic or igneous rock
Answer: False.
Genetic drift is a stochastic process that occurs randomly through time. It refers to random fluctuations in allele frequencies due to chance events (small population size).
Explanation: Factors that can affect genetic diversity are Genetic drift, mutation, selection, migration, non-random mating and recombination.
Of these factors, forces that majorly control the fate of genetic variation in populations are genetic drift and natural selection.
Genetic drift refers to random fluctuations in allele frequencies due to chance events (small population size).
Natural selection involves environmental conditions acting on wild plant or animal populations or species. Most fit in a selection refers to genotype or phenotype with greater average reproductive output over it's lifespan than other genotypes or phenotypes.
Answer:
The body has two lines of natural defense to protect against infection. The first are physical barriers, such as the skin, body secretions and mucous membranes. The second line of defense is the immune system. Specialized immune cells coordinate and execute attacks to kill germs that make it past the body's physical barriers.
Phospholipids have a hydrophilic(water-liking) ‘head’ and a hydrophobic ‘tail’ so they are amphipathic. They form a lipid bilayer because of their amphipathic properties. The tails get sandwiches between the hydrophilic heads that are able to interact with water.
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