4. In his science fair project, Julio did the following: He took 4 fish tanks and put 10 fish of identical size in each. Fish in tank 1 received 4 hours of light/day, fish in tank 2 received 6 hours of light/day, fish in tank 3 received 8 hours of light/day, and fish in tank 4 received 12 hours of light/day. At the end of 2 months, he measured the size of all fish and compared the fish in tanks 1, 2, and 3 with the fish in tank 4 because fish in tank 4 received the amount of light recommended by his teacher. what is the control

because the light is a great source of energy for the plants to survive. (i hope this )

the apgar score is 6

here are the 5 factors that are observed when calculating the apgar index:

skin color

blue everywhere - 0 points

white on the ends and pink on the body - 1 point

all pink - 2 points

heartbeat

absent - 0 points

slow - 1 point

fast - 2 points

reflexes

no answer: 0 points

responds to stimulations: 1 point

cries and coughs: 2 points

muscle tone

soft: 0 point

some bending or stretching: 1 point

active movements: 2 points

breathing

absent: 0 points

weak or irregular: 1 point

good and your baby is crying: 2 points

it is estimated that children whose score is between 8 and 10 are in perfect health and need only routine care. a score between 5 and 7 is representative of a fair condition. often this means that the child has suffered during delivery and probably needs with breathing. as a first step, your doctor will carefully rub the skin of your baby or give him oxygen with a mask.