Which are sources of adult stem cells? Check all that apply.

1. bone marrow

2. amniotic fluid

3. brain

4. gametes

5. liver

6. embryo

In bacterial genetics the term competence refers to a bacterium with ability to

The pedigree chart below shows the individuals in a family who exhibit a certain trait. Based on the information in the chart, which of the following provides the best evidence that this is a recessive trait?.

Like logistic growth, exponential growth A. reaches its carrying capacity over time. B. can be plotted in the shape of an S curve. C. exhibits a period of rapid growth as the population size increases. D. is slowed by limiting factors.

One characteristic that differentiates sclerenchyma cells from other cell types is they have ... Select one: a. a secondary cell wall b. thin primary cell walls c. a significant role in photosynthesis d. little cytoplasm

Identify one way in which the process of growth of a human embryo is similar to the process of reproduction in a single called organism

Which of the following would cause the earth to be pulled into the sun? A. The Sun loses its gravitational pull. B. The earth suddenly loses its inertia. C. Mercury and Venus speed up in their orbit. D.

The axons of myelinated neurons are imbedded in a protective covering of A. gray matter. B. nodes of Ranvier. C. synaptic knobs. D. Schwann cells

How many years less (on average) is the life expectancy for 65-year-old african americans than for 65-year-old european americans?

Which of the following organisms can perform alcoholic fermentation? (1) yeast, (2) humans, (3) bacteria. a. 1 and 2 b. 1 and 3 c. 1 only d. 1, 2, and 3

What lung is more efficient than a avian lung?