Can someone explain what an enzyme is?

The fissure in the brain that separates the two cerebral hemispheres is called the

Sariah's science teacher asked everyone in the class to bring a model of the park near their school so that they could add labels to them in class. To which kind of model would it be easiest to add labels?

Write out the full name for dna. what is a gene? where in the cell are chromosomes located? dna can be found in what two organelles? what two scientists established the structure of dna? what is the shape of dna?

A sedimentary rock is found to be 300 million years old. Which type of organism is NOT likely to be found in the rock? a) insects b) mammals c) fish d) land plants

According to the cladogram, which of these organisms appeared before all the others?

Which factors affect a rivers load

Which sentence best captures a central idea of the biography

Is a fossil still a fossil if it is preserved artificially? For example, (Is a mummy a fossil even though it was preserved by people?)

Which type of macromolecule is the quickest source of energy for the body

Which two structures contain DNA