Why can water pass through the cell membrane?

Which of the following would be the latest in the development of a human fetus? Bone starts to replace cartilage to form the beginnings of a skeleton The fetus grows to reach approximately eight centimeters in length Cells divide into the endoderm,

Which omnivore eats berries in summer and eats solmon in winter

A group of scientists is developing a new chemical compound. They want to test its effects on an aquatic ecosystem using a nearby ocean bay.

In science the term theory is best described as: A) an untested guess B) an explanation based on scientific evidence C) a hunch D) speculation

A fly has two alleles for the color of its eyes. The green allele is recessive, and is represented by q. The blue allele is dominant, and is represented by p. If 71 of 100 organisms are green, what is p? A. 0.16 B. 0.29 C. 0.84 D. 0.71

Which of the following are examples of ways humans and plants have coevolved? Pick all that apply A. Humans have bred plants to use as food B. Plants provide a source of nitrogen C. Humans aid in pollinating plants D.

By what mechanism does PI-3 phosphate promote activation of protein kinase B (PKB) ? a. recruiting PKB to the plasma membrane b. recruiting the activating kinase PDK1 to the plasma membrane c.

What is the definition of "Mass"?

Which of the following is a correct statement? Select one: a. If you want to make a cDNA library, it doesn't matter which tissue you isolate the mRNA from. b.

In fruit flies long wings (W) are dominant to short wings. What is the phenotype of the known parent