Which of these is a main organ in the nervous system?

a. lungs

b. skin

c. heart

d. brain

What characteristics do all living things have? hint: there are at least 5.

Explain how you would calculate the ecological footprint of the state that you live in if you knew the average ecological footprint of a resident in your state?

Why are enzymes so important to organisms-what do they do for the organism?

A substance that can be broken down by microorganisms is called: bionic biodegradable nonpolluting microdegradable

What are some of the ways physical properties of stars?

What is the best distinction between birds and other animals? A birds eat seeds B birds have amniote eggs C bird have feathers D birds can fly

A preterm newborn is noted to have hypotonia, apnea, bradycardia, a bulging fontanelle, cyanosis, and increased head circumference. these signs indicate the newborn has which complication

The organisms that breakdown organic wastes and remains of the dead into simpler substances that can be used by other organisms are known as

Technology can have good and bad affects. what is a bad effect spraying pesticides on crops with the use of airplanes?

Which statement below is false regarding ocean crust and continental crust? A: Ocean crust is more dense B: Continental crust is composed of only igneous rocks C: Ocean crust is younger D: Continental crust is older