What is used to indcate the flow of energy in a food

According to the video clip, what is the main function of photosynthesis?

Describe cirrus clouds

How do some cells become brain cells and other become skin cells, when the dna in all exactly the same. in other words, if the instructions are exactly the same, how does one cell be cell and another a skin cell?

What is the unit for frequency?

Which part of the central nervous system is used to serve as the main communications link between the body and the brain

Which is a type of muscle that powers the cardiovascular system? A. Skeletal muscle B. Cardiac muscle C. Cartilage muscle D. Smooth muscle

To investigate how the sex of an offspring is determined

Tightly curled hair is caused by a dominant autosomal gene in humans. This trait is rare among northern Europeans.

The rapid depolarization phase of the action potentials of myocardial contractile cells is due primarily to which ion (s) ?

Echinoderm reproduction typically is a. sexual reproduction by budding. b. sexual reproduction with internal fertilization. c. by regeneraton. d. sexual reproduction with external fertilization.