Flowering can be regulated by light, temperature, gibberellin levels, or internal factors. What do all of these different flowering pathways have in common?
A. All four pathways result in a decrease in LEAFY (LFY) expression, which induces flowering.
B. All four pathways result in an increase in CONSTANS (CO) expression, which induces flowering.
C. All four pathways result in an increase in LEAFY (LFY) expression, which induces flowering.
D. All four pathways result in a decrease in CONSTANS (CO) expression, which induces flowering.
C. All four pathways result in an increase in LEAFY (LFY) expression, which induces flowering.
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Gene regulation during development is _____, which means that _____
A. restrictive; genes are successively lost over time B. restrictive; genes lose developmental potential over time C. hierarchical; genes expressed at each stage control the expression of genes that act later D. hierarchical; genes are turned on in a specific sequence, starting with totipotent and ending with multipotent E. combinatorial; genes expressed at each stage control the expression of genes that act later
Aphids can feed in the leafy treetops (or tree canopies). Ants are usually not abundant in the tree canopies unless aphids are also present. You introduce aphids to an area of the tree canopy and survey the abundance of ants over time
You continue your experiments by taking one of the trees in the canopy and removing all of the ants. If the ants and aphids are in a mutualistic relationship that strongly benefits them both, you expect the aphid population will _____________ in response to the lack of ants. A. increase in size B. stay the same size C. decrease in size D. change species composition E. change in demographics (age distribution)
Energy ____
a. can be created, but not destroyed b. cannot be created, but can be destroyed c. can be created and destroyed d. cannot be created or destroyed e. can be created using a particle accelerator
The proportion of phenotypic variance that results from additive genetic variance is known as ________ heritability
A) broad-sense B) narrow-sense C) multifactorial D) generic E) genetic