Why are organelles surrounded by membranes?

What must happen to pyruvate before it can enter the kreb's cycle? explain.

Suppose the phloem of a seed plant is damaged and does not function properly. How will this most directly affect the plant?

Is a skunk a herbivore

Which type of scientific statement is defined as a statement of fact that is generally accepted to be true and universal becau it has always been observed to be true? O theory O probability O law

Which one of the following structures does air pass through first? A) Bronchi B) Larynx C) Pharynx D) Trachea

Jaden's father is immune to poison ivy. Jaden is also immune to poison ivy. Jaden's immunity to poison ivy is which kind of trait?

Which type of microorganism causes malaria? A. virus B. protozoan C. bacterium D. fungus

Which of the following makes ice cores so useful in determining the composition of the atmosphere in the past? A. the presence of pollenthe B. temperature of the core C. air bubbles D. fossilized plants

Describe how dominant and recessive alleles are represented in a Punnett square

What does adaptive radiation cause? A. Higher extinction rates B. Higher gene flow C. Higher biodiversity D. Higher genetic drift