Astar gives off heat and light from the nuclear fusion reaction that takes place inside. what change happenes durning the nuclear reaction ?

hydrogen is changed to helium
hydrogen is changed to nitrogen
nitrogen is changed to hydrogen
helium is changed to hydrogen

Which type of organism is missing from the food web seen in the illustration? primary consumers decomposers primary producers secondary consumers

The wings of insects, birds, and bats evolved independently but carry out similar functions. this is an example of a. analogous structures. b. embryonic structures. c. vestigial structures. d. homologous structures.

Identify characteristics of energy from the sun. check all that apply. almost all of the energy on earth comes from the sun. energy from the sun is known as mechanical energy. the energy in fossil fuels originally came from the sun. plants convert the energy of sunlight into chemical energy.