Question

Life is organized in a hierarchical fashion. Which of the following sequences correctly lists that hierarchy as it DECREASES in complexity?

a.cell, molecule, organ system, organ, population, tissue, organism,

b.ecosystem, community ecosystem, population, organism, organ system, community, tissue, organ, cell, molecule c.ecosystem, community, organism, organ system, organ, tissue, cell, molecule

d.molecule, cell, tissue, organ, organ system, organism, population, community, ecosystem

Significant confounds help indicate that a study has strong evidence in support of its findings.

True

False

wish to develop a breed of horse that does not shy (jump away) at things (usually resulting in the rider displaying the effects of gravity). I start with a diverse mixture of horses. Generation after generation, I only allow the quietest, non-shying horses to breed. After 30 years of work I have created a new breed of horse with interesting traits, but on average, the horses still shy at about the same rate as other horse breeds. Which of the following would be a logical explanation for my failure?

		There is no variation for the trait (shying).
		The selection was artificial, not natural, so it did not produce evolutionary change.
		The tendency to shy is not passed on in genes from parent to offspring.
		I did not breed enough of the frequently shying horses to obtain the desired result.

Answer 1

Question

1. Molecules, cells, tissue, organ, organ system, organism, community and ecosystem are in order of increasing  complexity. The ecosystem being high in complexity and molecules is low in complexity. Hence, option c is correct.

2. This is false statement because confounder affect both dependent and independent variable. Therefore it is not a strong evidence.

3. The natural selection do work on genetic variation present in a population. So, if enough genetic variation is not present in human population it will not bring the necessary evolution. Hence, option a is correct.