The cardiovascular system is composed of which of the following?

lungs, blood vessels, and heart

heart, lungs, and brain

heart, blood, and blood vessels

heart, arteries, and veins

A stationary front is associated with which of the following? A. a rising warm air mass B. a moving cold air mass C. air masses that are not moving D. air masses that have trapped warmer air between them

How does evolution or natural selection relate to the susceptibility of disease

A person's ability to quickly reason increases into early adulthood and fades in late adulthood. This is an example of how development is: A. static. B. multidirectional. C. pliable. D. multidimensional.

5. Every star starts with an initial mass of hydrogen. Each atom of hydrogen has one proton and one neutron. How are the total number of protons and neutrons conserved as a star ages and undergoes continuous nucleosynthesis

What might be the benefits of traveling circuitously to an unfamiliar destination?

Bio Bio bio question A scientific idea that has not been tested is a :

Which vitamin does the human skin synthesize from the Sun's ultraviolet light?

Since dinosaurs cannot swim how can a fossil be found on all continents

Four different segments of a DNA molecule are represented below

Why is the action of phagocytes considered a nonspecific response? A It does not occur at any specific temperature. B It is not involved with the production of any specific type of lymphocyte. C It does not respond to any specific type of hormone.