The heart along with the rest of the circulatory system could be compared to

A major transportation system in a city

A chemical manufacturing plant

The police department in a city

A recycling plant

Which of the following is an example of a pioneer species? a. fungus b. trees c. shrubs d. grass Secondary succession can happen after primary succession or independently of primary succession. a. True b.

How are animals like as heterotrophs?

The Great Lakes in North American hold about what percent of Earth's fresh surface water? 5% 10% 15% 20%

Due to natural selection, which type of seed MOST adapted to hot regions with low precipitation? a. seeds that are nondormant b. seeds that germinate quickly c. seeds that are not dispersed d. seeds that sprout seasonally

This sphere contains the solid, rocky part of the Earth A) Geosphere B) Biosphere C) Atmosphere D) Hydrosphere

Ape species began to dwindle during the Miocene, leaving only a few remaining: a situation that exists up to the present. It is thought that the number of ape species reduced at that time because

Jon is in a car accident and severs an artery in his leg. He loses a significant amount of blood and experiences a drop in blood pressure. Explain how his body senses these changes, and how it will respond in an attempt to maintain homeostasis.

a scientist is conducting an investigation that involves water, silver corbon dioxide, and oxygen gas. Which group of statement best describes all of the materials he is using in the investigation?

The question below refers to the selection "taste-the final frontier." hydroponic plants are grown - a. on mars. b. without air. c. in water. d. in soil.

The movement of hot and cold air between land and sea creates what? a. Sea breeze b. Solar energy c. Trade winds d. Coriolis effect