Young tadpoles breath like fish. what structure enables them to breathe underwater

A. tracheae

B. skin

C. alveoli

D. gills

The walls of the biodome are made of a material that absorbs and locks away carbon dioxide from the air so it is not available to the living things inside.

An automobile with a mass of 1221 kg accelerates at a rate of 3 m/s² in the forward direction. What is the net force acting on the automobile? N

Is dna considered to be an organic molecule? Why or why not?

When lava form bare rock what type of organism can grow first on the rock

Explain why the ultimate chemical nature of protoplasm cannot be determined.

In which phylum do we first see the tissue level organization

Suppose a dominant allele (N) codes for a big nose and a recessive allele (n) codes for a small nose. Imagine that an organism receives a dominant allele from its mom and a dominant allele from its dad.

Where is air almost completely humidified? in the lungs in the trachea in the alveoli in the nose?

The first antibiotic was made because of properties discovered in a certain type of

What is the major force responsible for the formation of an α-helix in protein secondary structure?