Check all the statements that are true for BOTH T cells and B cells. 1. The cells have a specific protein receptor in their membranes.
2. uses cells to defend against pathogens
3. regulates the production of plasma cells
4. when activated, make millions of clones of themselves
5. uses antibodies to defend against pathogens
6. can bind with free-floating antigens
7. form memory cells to provide protection against future attacks by the same
pathogen
8. responsible for regulating the immune system
9. produced in bone marrow
10. mature in the thymus

Use the drop-down menus to label each of the following changes p for physical change and c for chemical change.

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.

Which feature of a human community is similar to a niche in a biological community