What characteristic is shared by birds, salamanders, and sharks?

A. Lungs

B. Endothermy

C. Four limbs

D. Jaws and paired appendages

(Im pretty sure its not A or B but idk)

Define natural selection according to charles darwin

Why are neurons necessary for animal systems and why are they only found in animal systems?

When are some of the important combinations active?

While le examining a rock surface, you have discovered an interesting new organism. Which of the criteria will allow you to classify the organism as belonging to Bacteria but not Archaea or Eukarya?

During drought years on the galapagos, small, easily eaten seeds become rare, leaving mostly large, hard-cased seeds that only birds with large beaks can eat.

Which organ does not play a role in mechanical or chemical digestion

A kilogram is an sl unit. which quantity might you measure in kilograms?

Imagine that you are a doctor in a maternity ward. During your last shift, 20 bables were born. 10 had blue eyes, and 10 had brown eyes. Remember genotypes are the two alleles given for each trait, written with a letter.

What is a scientific procedure followed to obtain results for analysis. This is also a means to test a hypothesis.

Determine the nature of the expression of the lacZYA genes, represented by L, and label each genotype as constitutive, inducible, or no transcription in the presence of lactose. Assume that all promoters are wild type.