Biology 112
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Latest content Biology 112
1. State whether the following genes are positive or negative regulators of 
photomorphogenesis and explain why. Predicts the phenotype of plants that 
overexpress each of these genes when they are grown in the light and in the dark. PHY, 
COP1, HY5 
a. Positive and negative regulators. 
i. Negative regulator - COP1 because recessive mutations in this gene 
cause photomorphogenesis in the dark. Therefore, the wild type gene 
must repress photomorphogenesis. 
ii. Positive regulators - PHY and HY5...
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biology 112•biology 112
Biology Ecology 2 complete latest update 2024 solution 
 
 
 
 
 
 
 
 
 
 
Population density	the number of individuals that live in a defined area. 
 
different, same	Populations of different species often have very __________ densities, even in the ___________ environment. 
 
geographic range	the area inhabited by a population 
 
size, species	A population's range can vary enormously in ______, depending on the ____________. 
 
Distribution/dispersion	how individuals in a population are ...
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BIOLOGY 112•BIOLOGY 112