D. marble i know this because i just had a test on this!
Abscission layer is the layer of cutinized parenchyma cells that develops in the abscission zone. The abscission zone form across the base of the plant part, where the break eventually occurs. During the photosyntesis chlorophyll using sunlight produces sugar and storches which are used as food by plant. And sugar accumulate in leaves.
The vaccine that may be administered to him at 14 years old is a dose of tetanus toxoid as this can present as pain from injection site. Since there is nothing said about the number of doses that he received, the patient should receive Tdap (tetanus, diphteria, and acellular pertussis) as stated from the Center of Disease Control and Prevention guideline for tetanus.
While giving birth to her infant during labor, the safest and the most effective pushing technique taught to a woman during contractions is grasping knees, head elevated and breathing out.
During labor, it is very important for the mother to keep breathing. If she holds her breath, it will put pressure on the vena cava and lead to a reduction in the blood return. The head is kept elevated and the back is rounded which aids the abdominal muscles to help the uterus to push the baby out. Grasping the knees also helps in pushing and encouraging the movement of the infant outside the body.
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The independent variable is a variable that can be stood alone. So therefore, the independent variable would be how long it takes to parachute.
