How do plant roots "know" to grow downward?

Is it possible to determine the genotype of a person showing a dominant phenotype? A recessive phenotype? Why?

Which reflex requires gamma motor neurons to set the length of the muscle?

Why and/or how are invasive species of plants introduced to new foreign areas?

Can two organisms with the same phenotype have different genotypes?

A cross between pea plants with red flowers and plants with white flowers resulted in all offspring with pink flowers. this experimental result demonstrates a. true-breeding. b. blending model of genetics. c. dominance. d. incomplete dominance e.

What is the sidereal period used in Kepler's third law? A. the time taken by the planet for one rotation around its axis B. the time it takes for a planet to complete one orbit with respect to the background of fixed stars C.

The breakdown of complex carbohydrates into glucose is completed in the small intestine during digestion. What protein acts as a catalyst to speed up the reaction?

It was found that the astronaut in a spaceship has no difficulty in swallowing food even if they are upside down explain why? can you swallow food when you are upside down on earth explain your answer?

Which of the following is needed for natural selection to occur? Select one: a. variation in characteristics b. differences in fitness c. heritability of characteristics d. all of the above

When the sun's disk is covered in an eclipse the corona is still visible?