You are presented with the question "What is used for cellular respiration for aerobic organisms?" and the following answer choices: - air - O2 - O3 - RNA - CO 2 - fat - lung - tube Now knowing that oxygen is essential for cellular respiration for all aerobic organisms and air is used as a source of oxygen, choose the best answer.
air
(Question)
You are presented with the question "what uses its skin for protection?" and the following answer choices: - amphibians - squids - worms - shield - alligators - sea urchins - Annelids - chicken Now knowing that scales are used for protection by scaled animals and like all reptiles, alligator skin is covered with rows of scales, choose the best answer.
(Answer)
alligators
Ques: You are presented with the question " _ are the major producers in terrestrial ecosystems." and the following answer choices: - Plants - flowers - phytoplankton - leaves - bacteria - Trees - algae - grass Now knowing that plants are the major producers in terrestrial biomes and biomes are global ecosystems, choose the best answer.
Ans: Plants
(Q).
You are presented with the question "A mutation in the sex cells of a parent can cause a new trait to appear in the parent 's what?" and the following answer choices: - sperm - parent - DNA - ancestor - child - gametes - haploid - self Now knowing that amutation in the sex cells of a parent can cause a new trait to appear in the parent 's offspring and child' is ambiguous between 'offspring' and 'immature offspring', choose the best answer.
(A).
child
Ques:You are presented with the question "what causes direct damage to the lungs?" and the following answer choices: - breathing - oxygen - influenza - parasites - cigars - germs - steroids - respiring Now knowing that smoking causes direct damage to the lungs and cigar smoking is on the rise, choose the best answer.

Ans:cigars
Question: You are presented with the question "What happens when a sperm enters an egg?" and the following answer choices: - Conception - It will move. - competition - Menstruation - rapid expansion - The egg multiplies - Sperm reproduce - pollen Now knowing that fertilization occurs when sperm swim to an egg inside an archegonium and when conception occurs in the female, a sperm fertilizes an egg, choose the best answer.
Answer:
Conception