If plants disappeared how long would oxygen last

The common space used by both the respiratory and digestive systems is the

Many songbirds breed in North America in the spring and summer and then migrate to Central and South America in the fall.

What kind of quantity is a force?

Factors in a forest ecosystem biotic and abiotic

Drugs that kill or slow the growth of bacteria are called

Carbon-14 has a half life of 5,770 years. A fossil was found that had 1/32 of its original Carbon-14 remaining. How old is the fossil?

Why are many trials taken and averaged in an experiment?

Northern flickers are woodpeckers of the eastern United States. Males, but not females, have black feathers that resemble a moustache extending from the bill along each side of the head.

The following are features of mitosis or meiosis. can you put them in groups. im so confused : allows for transmission of chromosomes to offspring, necessary for growth and regeneration, allows for regeneration of an organism, two identical diploid

Who signs a death certificate