Hair is produced at the base of hair follicles from columns of cells that die when they are filled with keratin.

True or false?

Which of the following is not made up of keratin?

a.

fingernails

c.

sweat glands

b.

hair

d.

epidermis

Depending on the blastopore fate of its members, label each branch with P (for protostomy), D (for deuterostomy), N (for neither), or P & D. Labels may be used once, more than once or not at all

What is the author's purpose for writing "Your DNA at Work"?

How might water on the surface of the solid culture medium cause the disruption of colony formation?

In which process does the water form clouds. A-transpiration B-condensation C-evaporation D-percolation

Which statement correctly describes how cellular DNA content and ploidy levels change during meiosis I and meiosis II? (Note: Ignore any effects of crossing over.)

DNA is genetic material that makes up living things, and folic acid plays an important role in the formation of DNA. Jon wants to study the effect of folic acid on DNA formation in microbes.

Your alien friend from planet Xenon is visiting and wants to learn how to breed pea plants. You show your friend a recent batch of pea plants with purple flowers that you grew by crossing plants that had purple flowers with plants that had white

The green stem ant has three (autosome) chromosomes. During meiosis, chromosome 1 and 3 separate normally, but chromosome 2 homologs do not separate during meiosis I. Meiosis II happens normally. What will the resulting cells of meiosis look like?

A population is growing at a rate of 2,4,8, 16, 32. Which type of growth does this describe?

Which epithelial tissue type is most often found lining large ducts, such as those of the salivary glands or pancreas?