Answer:
Arthropod.
Explanation:
Arthropods have an exoskeleton & jointed limbs. Insects and some other land arthropods breathe through a system of tiny body tubes called tracheae. Some examples of arthropods are a spider or a scorpion.
Mercury Barometer and aneroid Barometer
Answer:
dynamic equilibrium is the answer.
Dynamic - motion
Equilibrium - no net change
Description
Newton's law of universal gravitation is usually stated that every particle attracts every other particle in the universe with a force which is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers.
Answer:
A maple tree is an example of a tree