When the polar nuclei are fertilized what is formed?

You are examining two unknown muscle cells under the microscope. Cell A could be cardiac muscles and cell B could be skeletal muscle if

Which phrase best defines extinct? A. no longer living B. gravely threatened C. endangered D. living only in very remote areas

There are three layers of neurons in the retina The innermost (i. e., towards the inside of the eye) layer is "made up of which cells"? a. cone cells b. bipolar cells c. ganglion cells d. rod cells

Which macromolecules have a basic unit that is composed of phosphate, a sugar ring, and one of five different base?

The wide variety of color observed in a coral bed is due to the presence of bacteria

Some lizards have an adaptation that allows their tails to break off with minimal damage to bones, nerves, blood vessels, and muscles. This type of lizard can then regrow the missing portion of the tail.

1. A source of simple carbohydrates is a. seeds c. fruits b. brownrice d. potatoes

What does the Magnuson Stevens Act deal with? A. setting up of marine sanctuaries B. prevention of overfishing C. regulating disposal of materials into the ocean D. protection of marine mammals

In addition to a thicker stratum corneum and the presence of a stratum lucidum, the thick skin of the palms and fingertips of the hands and of the soles of the feet have a denser array of sense receptors than thinner skin found elsewhere on the

Which of the following theories sees aging as a process whereby cells are assumed to have a limitation on the number of times they can reproduce to repair damage? a. wear-and-tear theory b. cellular clock theory c. activity theory d.