For an organism to belong to class mammalia, it should have A . spinal cord
B . ear drum
C . limbs
D . mammary glands

What would happen if the tubing with the yellow band was placed in a beaker of distilled water?

Which situation is an example of not doing work? lifting a couch throwing a baseball running up stairs carrying a box

In a population that is in hardy-weinberg equilibrium, there are two possible alleles for a certain gene, a and a. if the frequency of allele a is 0.4, what fraction of the population is heterozygous? a. 0.40 b. 0.60 c. 0.16 d. 0.48