The following figure is a model of seedling establishment as a function of distance from a parent tree. Initial seed density measures the number of seeds falling to the ground. Seed survivorship measures the proportion of seeds that survive to the adult stage at each distance

Which of the following factors is most likely to generate the seed survivorship curve shown? 

TLS Online TPP Program

#Question id: 2561

#Unit 2. Cellular Organization

Tay-Sachs disease is a human genetic abnormality that results in cells accumulating and becoming clogged with very large, complex, undigested lipids. Which cellular organelle is most likely defective in this condition?

TLS Online TPP Program

#Question id: 2562

#Unit 2. Cellular Organization

Which of the following statements is true of steroid receptors?

TLS Online TPP Program

#Question id: 2563

#Unit 2. Cellular Organization

The eyes and the respiratory tract are both protected against infections by ________.

TLS Online TPP Program

#Question id: 2564

#Unit 2. Cellular Organization

A cell with a predominance of rough endoplasmic reticulum is most likely ________.

TLS Online TPP Program

#Question id: 2565

#Unit 2. Cellular Organization

Which of the following is the most plausible explanation for why an animal cell would be unable to reduce the Ca2+ concentration in its cytosol compared with the extracellular fluid?

TLS Online TPP Program

#Question id: 2566

#Unit 2. Cellular Organization

An inhibitor of which of the following enzymes could be used to block the release of calcium from the endoplasmic reticulum?