Chad drew a diagram to compare animal cells and bacterial cells. Which label belongs in the area marked X?

A. nucleus

B. DNA

C. cell wall

D. ribosomes

Mitochondria are responsible for providing () for the cell. Aerobic respiration happens in the mitochondria.

TRUE OR FALSE 1. Oxygen is absorbed into the bloodstream in the trachea? 2. The bronchial tubes branch off from the trachea like an upside-down letter Y.

Which of the following is a risk of commercial fishing?

What did Darwin think about Earth and life while he was forming his theory of evolution? Earth changes slowly over time, so populations might, too. Earth might cause fast, rapid changes in the traits of individuals.

Explain why the genetic content of individual chromosomes in a spermatozoon most likely differs from the genetic content of individual chromosomes in a primary spermatocyte.

Alveoli, capillaries, and glomeruli capsules are all lined with simple squamous epithelium. What function is shared by these structures?

Which of the following is a way that new DNA can be introduced to bacteria?

Why do you think it is important to cover your mouth when you cough?

A 100 kg log of wood was neatly cut into two smaller pieces. What is the total mass of all the smaller pieces put together? 50 kg 100 kg 200 kg 1,000 kg Explain.

True or false air masses are moved by the global wind currents