In the chemical compound C2H2, how many pairs of electrons are shared between the two carbon atoms? A. one pair of electrons B. two pairs of electrons C. three pairs of electrons

What is an endocrine function? (Apex) A. esophageal glands release mucus into the esophagus B. salivary glands Release saliva into mouth C. swear glands release sweat to the skin D. the pineal gland releases melatonin into the bloodstream

Which type of tree does not have rounded cones and most of the leaves are not sharp

In a dna molecule the bases are covalently bonded to sugar molecules true or false

Which is biotic? wind iron gate sunlight dead leaf

Explain how fossil fuels found in the Earth's crust are ultimately the result of biological processes.

4. During what phase do centrioles begin to migrate to opposite poles of the cell?

Are made of long chains of amino acids

Maria is testing the behavior of monkeys. First, she shows the monkey a rectangle. Then she shows the monkey a rectangle and a cylinder. If the monkey pushes aside the rectangle, Maria gives the monkey a food reward.

Why is the phloem in a leaf important to the roots of a plant? A. It provides the roots with carbohydrates. B. It provides the roots with nutrients from the soil. C. It transports water to the leaves from the roots. D.

A mutation causing an addition or a deletion of one base pair resulted in the production of a nonfunctional mutant protein. The sequences of the normal and mutant proteins are given below.