What methods can be used to isolate bacteria? (Check all that apply.) Check All That Apply Quadrant streak plateQuadrant streak plate Bright field microscopyBright field microscopy Loop dilutionLoop dilution Use of selective mediaUse of selective media Spread plateSpread plate Gram stain

Explanation:

Quadrant streak method is used to separate pure agar plate colonies.

Loop dilution is a dilution technique in which inoculum is diluted every time we sterilise the loop followed by placing on agar plate which helps to isolate pure colonies.

Selective media encourages bacterial growth. Selective media is one that has added components to it that inhibit or prevent the growth of certain forms of bacteria and encourage the growth of desirable organisms.

the element that provides strength to the exoskeletons of clams and oysters is phosphorus.

this is so because calcium carbonate is the main component in the shells. calcium carbonate is strengthened by phosphorus.

explanation:

the answers are as following:

1. c. double helix, nucleosome, coil, supercoil, chromosome

2. b. g2 phase, preparation for mitosis

3. d. interphase consists of the g1, s, and g2 phases

4. c. metaphase

5. a. chromosomes are duplicated before cell division so that each new daughter cell has a complete set