The major cause of tropical deforestation is
A) hurricane destruction of large regions.
B) people clearing forests to open up land for agriculture.
C) governments clearing forests to build cities.
D) natural succession as global warming occurs.
Answer: B
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Cytoplasmic division (cytokinesis)
a. differs in plant and animal cells. b. usually accompanies nuclear division. c. involves microtubules and/or actin filaments. d. in plant cells utilizes an established zone marking the plane of division. e. does all of these.
You are performing an experiment to assay phosphorylation of a substrate by a protein kinase. Based on the data in the table below, what do these experimental results suggest?
A. The substrate is not required for phosphorylation. B. The substrate can undergo autophosphorylation. C. The protein kinase is required for phosphorylation. D. GTP is not required for phosphorylation.
When ____ reaches the stomach, it is inactivated by the low pH
a. pepsin b. pepsinogen c. trypsin d. amylase e. bile
Suppose you have the following regression results from a regression of home prices on house attributes for a random sample of house transactions: CoefficientsStandard ErrorIntercept16310.04114.5Number of Bedrooms7295.31399.9Number of Bathrooms23473.04032.0Given these results which additional condition would be sufficient to ensure number of bathrooms satisfies the "primary criteria" for a good control variable in attempting to identify the causal effect of number of bedrooms on house prices?
A. The number of bathrooms is correlated with the number of bedrooms. B. The number of bathrooms is correlated with house prices. C. The number of bedrooms is correlated with house prices. D. The p-value for the number of bedrooms.