Q2 In cacti, long arms (A) are dominant to short arms (a). Suppose 2 heterozygous cacti
are crossed. What percentage of their offspring are expected to have short arms?
A 0%
B 25%
C 75%
100%

What do isotopes of uranium have the same number of? what do they have a different number of? a) same number of protons; different number of electrons b) same number of protons; different number of neutrons c) same number of electrons; different number of protons d) same number of neutrons; different number of protons

In general, characteristics that an organism survive and reproduce become more common in a population over time. what mechanism of evolution cause this change?

Red blood cells are responsible for transporting oxygen in the blood. people with sickle cell anemia were born with a defective gene that results in sickle-shaped red blood cells. individuals with the disease often suffer pain in their extremities due to the build-up of these cells causing blockages in the blood vessels. the shape of the blood cells also reduces the amount of oxygen transported in the blood.