Why is dark skin (a result of increased melanin production in equatorial peoples) likely a response to ultraviolet (uv) radiation?

What's the function of the digestive system

The height of a plant is recorded every twelve hours since it was planted.

The aerobic phase of cellular respiration in the mitochondrion produces a net of about 28 to 30 ATP molecules. How does this compare to the energy released in glycosis?

Does the type of liquid affect how fast an ice cube melts?

If a gene is always passed from one generation to another and is always seen, this gene is?

Which of the following would NOT be true of cDNA produced using human brain tissue as the starting material? a. It was produced from mRNA using reverse transcriptase. b. It could be used to create a complete genomic library. c.

The weather is dry and warm. what changes would a cold front bring? A. rain or thunderstorms B. dry air and sunny skies C. extended period of rain or snow D. several days of gray skies

The chromosomes that go together in a pair are called ... ?

Which of these statements is true? the gram-positive wall contains a thick peptidoglycan layer and is more complex than the gram-negative wall.

Do biologists fully understand DNA now?