Which statement explains why greenhouse gases are needed for the survival of life on Earth?
A.
Greenhouse gases are clean sources of energy.
B.
Without greenhouse gases, Earth would be too cold for life to exist.
C.
Inhaling greenhouse gases is essential for proper lung function.
D.
Greenhouse gases prevent celestial objects from entering Earth’s atmosphere.

Ineed a chemical reaction takes place in which erlergy is released. arrange the reaction's characteristics in order from start to finis lower energy of reactants higher energy of products higher energy of reactants transition state sd lower energy of products

Use this dichotomous key for insect identification to identify the insect shown. 1. a. insect has one pair of wings. order diptera b. insect has two pairs of wings. go to #2 2. a. front wings thicker in texture than hind wings go to #3. b. front and hind wings are same texture throughout. go to #4 3. a. front wings are short order dermaptera b. front wings cover entire abdomen order coleoptera 4. a. wings with scale on all parts of their area. order lepidoptera b. wings without scales go to #5. 5. a. hind wings smaller than front wings. order ephemeroptera b. front and hind wings nearly equal in size. order odonata the insect pictured is in the order diptera. ephemeroptera. coleoptera. odonata.

In the respiration-photosynthesis cycle shown above, what are the products of cellular respiration that belong in box 2?