The solar system is made up of eight planets, numerous comets, asteroids and moons, and the sun. the force that holds all of these objects together is

How are the testes and ovaries similar? a. both produce sex cells. b. both connect internal reproductive organs to the exterior. c. both transport sex cells from their site of production. d. both store mature sex cells.

Write a paragraph explaining how energy flows through an ecosystem using the following terms: energy pyramid, trophic level, producer, primary consumer, decomposer, sun, secondary consumer, and tertiary consumer. .

How do you suppose living conditions differ between the country furthest along in the demographic transition compared to the country earliest in the transition? how would living conditions in these two countries affect both birth and death rates?