Large amounts of oxygen gas first appeared in earth's atmosphere about years ago. 500,000 3.5 million 10 million 2.7 billion 3.5 billion

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.

What two factors does carrying capacity compare? population size and resource use population growth and resource availability resource use and time population size and time

How did the work of farmers and breeders in england influence the work of charles darwin