Biology

Which of the following is a major mechanism whereby hormones control plant devel

Started by xclash

Evidence for phototropism due to the asymmetric distribution of auxin moving dow

Started by xclash

According to modern ideas about phototropism in plants, A) light causes auxin to

Started by xclash

A plant seedling bends toward sunlight because A) auxin migrates to the lower pa

Started by xclash

The apical bud of a shoot produces ________, resulting in the inhibition of late

Started by xclash

After some time, the tip of a plant that has been forced into a horizontal posit

Started by xclash

Gravitropism in plant shoots and roots differ in that A) only shoots depend upon

Started by xclash

The ripening of fruit and the dropping of leaves and fruit are principally contr

Started by xclash

Which plant hormones would likely be found in high amounts in a sprouting vegeta

Started by xclash

Which of the following plant hormones would be found in very low amounts in a ma

Started by xclash

The plant hormone involved in aging and ripening of fruit is A) auxin. B) ethyle

Started by xclash

When growing plants in culture, IAA is used to stimulate cell enlargement. Which

Started by xclash

Why do coleoptiles grow toward light? A) Auxin is destroyed by light. B) Gibbere

Started by xclash

Which of the following statements applies to plant growth regulators? A) They on

Started by xclash

Plant hormones produce their effects by A) altering the expression of genes. B)

Started by xclash

Why might animal hormones function differently than plant hormones? A) Animal re

Started by xclash

Which of the following hormones would never be found in high concentrations in a

Started by xclash

Plant hormones can have different effects at different concentrations. This expl

Started by xclash

Auxins (IAA) in plants are known to affect all of the following phenomena except

Started by xclash

How does indoleacetic acid affect fruit development? A) by preventing pollinatio

Started by xclash

Oat seedlings are sometimes used to study auxins because A) they are a readily a

Started by xclash

Auxin triggers the acidification of cell walls, which results in rapid growth, b

Started by xclash

If a farmer wanted more loosely packed clusters of grapes, he would most likely

Started by xclash

Which of the following plant hormones are most likely to act synergistically if

Started by xclash

Which of the following statements best summarizes the acid growth hypothesis in

Started by xclash