Approximately how many genes do humans have?

a. 10000

b. 20000

c. 50000

d. 100000

Carbon can be suspended for hundreds or even millions of years in which of the following

After much research and DNA analysis it has been determined that species in the same clade are actually more distantly related than originally thought. What is one way that the cladogram may change because of this information?

The proper function of the cardiovascular system relies on blood following the correct pathway through the heart. Valves within the heart separate the organ's chambers and prevent blood from flowing in the wrong direction.

Which of these is an example of negative feedback? a. As a blood clot begins to form, the process of its formation gets faster and faster. b.

The term vestigial comes from the Latin word vestigium, which means track or footprint. Explain how this relates to the meaning of vestigal structures

How does the amount of energy available change as you move from one trophic level to

Question 3 What is the asthenosphere? The tectonic plates The Earth's crust The lower mantle The molten part of the upper mantle.

What is the semi-solid food found inside the stomach during digestion called?

Proteins are the building blocks of all the tissues in the body. Which of the following cell organelles are directly responsible for making and packaging proteins?

How could an endocrine system disorder most likely affect the respiratory system? A. It could restrict air flow through the bronchi. B. It could disrupt the rate of respiration. C. t could prevent hemoglobin from binding to oxygen. D.