When climbing a mountain, we can observe transitions in biological communities that are analogous to the changes ________.

#Question id: 23118

#Unit 2. Cellular Organization

#Question id: 1447

#Unit 4. Cell Communication and Cell Signaling

A patient with B cell leukemia donates some cancer cells for analysis. The cells do not contain the usual chromosomal translocations associated with leukemia. Instead, a sporadic mutation seems to have arisen in a certain gene, followed by loss of heterozygosity in the second copy. This gene product is most likely:

#Question id: 32215

#Unit 1. Molecules and their Interaction Relevant to Biology

 

#Question id: 11177

#Unit 10. Ecological Principles

Intraspecific competition can result in individuals migrating from

#Question id: 4863

#Unit 8. Inheritance Biology

Two genes of a flower, one controlling blue (B) versus white (b) petals and the other controlling round (R) versus oval (r) stamens, are linked and are 10 map units apart. You cross a homozygous blue-oval plant with a homozygous white-round plant. The resulting F1 progeny are crossed with homozygous white-oval plants, and 1,000 F2 progeny are obtained. How many plants of each of the four phenotypes do you expect?