Which layer of the atmosphere do airplanes reach? A. Troposphere B. Mesosphere
C. Thermosphere
D. Stratosphere

Pink fur (p) is dominant to purple fur (p) in hamsters. two heterozygous pink hamsters are crossed. what is the probability that these two parents will have an offspring with purple fur? 2/4, 1/2 or 50% 1/4 or 25% 3/4 or 75% 4/4 or 100% there is no chance for this type of offspring

Describe your dna model. which part do the straws represent? the pushpins? the paper clips and the black dots you made with the marker?

Ascientific idea becomes valid when it is what?