These are a pair of organs inside a whale that take in oxygen from the air and allow this oxygen to enter the animal's blood. These organs are called

What is one example of urban efficiency. A. Gridlock B. Bright lights C. A subway system D. The highway system

So i am just starting out in biology and i was going to ask wat does biology stand for

Which type or types of rock can become metamorphic rock? A. igneous, sedimentary, and metamorphic rocks B. only sedimentary rocks C. metamorphic and igneous rocks D. igneous and sedimentary rocks

How can a new element be made, A by changing the number of neutrons in the atom, B by changing the number of protons in the Atom, C by changing the number of electrons in the Atom, D New elements cannot be made from existing elements

An organism that contains chloroplasts is able to produce food by the process of

What is one of the most important factors in determining whether a chemical reaction will occur?

What is a alleles in biology?

Sex-linked traits are found on which chromosome?

Most scientists recommend reducing carbon dioxide emissions. Less carbon dioxide in the atmosphere would be expected to

What effect on the evolution of mammals was caused when the continents drifted apart?