A radioactive tracer has a half life of 2 hours. How much of a 2500 g sample will be available after 24 hours?

A) 2.44 g

B) 1.22 g

C) 0.610 g

D) 0.31 g

Explain how hypertonic hypotonic and isotonic solutions differ

What is the effect of cholesterol in the cell membrane? a) Cholesterol moderates membrane fluidity at low and high temperatures. b) Cholesterol enables a sharp increase in fluidity at the transition temperature.

Bacteriophage t4 can adsorb to its host because of binding sites in its tail fibers that recognize areas of the e. Coli cell wall. True False

Which must an animal do in order for cellular respiration to begin? O tum energy into sugars o eat food O gain energy • change sugars into food

What is a landslide that happens on a curved suface called

How and why does soil and water heat and cool differently and how that affects the air above it

What is the adaptive (natural selection) benefit of the diving response in aquatic and marine mammals? do you think it has an adaptive purpose in humans of is it just a remnant of our evolutionary past?

What happens to the density of the Earth's Layers as you move towards the core of the earth

In humans, what is the results when a valve is leaking blood backward in the heart

The spindle forms during this phase