A change in the allele frequency of a population over time is called natural selection

survival of the fittest

adaptation

evolution

Liquids and proteins are both types of what?

Plesiosaurs swam by using their paddle-like limbs in a manner similar to that of a fish. sea lion. human. none of the above

When a single cell of E. coli reproduces, it first duplicates its DNA. Next, the cell elongates as each copy of DNA is pulled toward opposite ends of the cell.

Is medical marijuana legal?

There is a hypoxic dead zone in the Gulf of Mexico due to nitrogen-rich runoff from the Mississippi River. When the Mississippi flows into the Gulf of Mexico, it introduces high levels of organic pollutants and nitrates from fertilizers.

Switching from incandescent bulbs to compact fluorescents (cfl) provides a two-fold benefit during the summer. why?

What is the difference between osmosis and diffusion?

Which of the following is a serious threat to underground water supplies

1. Springs form where groundwater sinks into the soil there is no water table the water table intersects the ground surface flooding makes streams overflow their banks

Bio 254 - Pre-Class Assignment 1 Fill in the blanks 1. The "first line of defense" in innate immunity is 2. Histamine kinins, and interleukins are examples of