Match these machines with their examples. 1. seesaw wedge 2. pencil sharpener third-class lever 3. bottle opener wheel and axle 4. forearm second-class lever 5. nail first-class lever

Explanation:  

Simple machines make our work easier. There are many types of simple machines.

(1) Seesaw is an example of a first-class lever. In the first class lever, the fulcrum is present in the middle of the lever.

(2) Pencil sharper: It is a compound machine. It consists of wheel and axle and wedge also.

(3) Bottle opener: It is a type of 2nd class lever. In this, the fulcrum is present at one end.

(4) Forearm: It is an example of a third-class lever. Fulcrum is present at one end in the third class lever.

(5) Nail: It is an example of the wedge as all knives or nails are wedges.

g1

choices:

a. g2. b. g1. c. m

cell division has two checkpoints namely, g1

checkpoint and spindle assembly checkpoint. the checkpoint which determines if

division has properly occurred is the g1 checkpoint. at this point, is a damage

in the dna is detected or  the has not reach the optimum size, the cell is

stopped in g1 and is not allowed to proceed to further process.

source:

human-caused climate hope this