Sirius B was an important star in ancient Egypt and was used to warn for floods on the Nile River. Is Sirius B brighter or dimmer than the Sun? *

a) Brighter*

b) Dimmer

If a field population started with 50% standard (YY) plants and 50% yellow-green (yy) plants, how would you expect the frequencies of the two alleles (Y and y) to change in future generations? Base this answer on your conclusion in question 3.

Which organ filters and cleans the blood as well as produces the urine that carries the waste?

How might the biodiversity of various regions of the earth have changed in the future?

Which question can be answered by science? A. Why do paper bags look better than plastic bags? B. How much energy is used to make one paper bag? C. How should you feel about using plastic bags? D. Should stores be allowed to give away paper bags?

How are the tectonics plates moving along the mid Atlantic ridge?

What information do viral genes contain? A. directions for producing cellular proteins B. instructions for making more viruses C. instructions for DNA synthesis D. directions for invading the host cell

To conduct a phylogenetic analysis, we need an outgroup to: A. decide which characters are analogous and which are homologous. B. determine which character states are ancestral and which are derived. C.

Only homologous characters are useful in constructing phylogenetic trees. True or False

Evidence suggests that the earliest stone tools of early Homo were important for: a. protection from other hominid species b. the systematic hunting and killing of large animals (such as dinosaurs) c.

A stuffed toy with a mass of 0.900 kilograms sits on the edge of a bed at a height of 0.830 meters. If the toy falls off the bed, what will its mechanical energy be at a height of 0.500 meters? (Ignore frictional effects.) A) 0.0 J B) 3.6 J C) 7.