Question 12 (1 point)Which of these is a biotic factor that affects population size?
a
air
food
C
temperature
precipitation
Od

At the base of the brain is the _____, which controls the pituitary gland and maintains homeostasis.

According to the Big Bang theory of the origin of the universe, the universe has expanded from a hot dense state into a vast, cooler state. What would be considered scientific evidence supporting this theory?A) Galaxies are moving toward each other.
B) Galaxies are moving away from each other.
C) Cosmic background X-ray radiation was detected in space.
D) The existence of common elements throughout the universe.

Scientific consensus supports the idea that living organisms require oxygen. Then, a scientist discovers a type of bacteria that metabolizes sulfur instead of oxygen, and thus survives in environments without oxygen. The scientist concludes that a diverse group of many different organisms could live in an oxygen-free environment. Why should are some scientists skeptical of the scientist’s results and conclusion?

Every year, millions of acres of land are cleared by forest fires. Which of the following best describes a consequence of these catastrophic events?Carbon dioxide levels decrease rapidly in the areas near the fire.
Population sizes will increase as new species move into the cleared area.
Invasive species will quickly take over the disturbed area.
Biodiversity will decrease in the area of the fire.

Upturned Face by Stephen Crane (excerpt)

Read the excerpt about two men trying to bury a dead soldier right in the middle of a battle.

"Yes," said Lean. The two privates stood waiting, bent over their implements. "I suppose," said Lean, "it would be better if we laid him in ourselves."

"Yes," said the adjutant. Then apparently remembering that he had made Lean search the body, he stooped with great fortitude and took hold of the dead officer's clothing. Lean joined him. Both were particular that their fingers should not feel the corpse. They tugged away; the corpse lifted, heaved, toppled, flopped into the grave, and the two officers, straightening, looked again at each other—they were always looking at each other. They sighed with relief.

The adjutant said, "I suppose we should—we should say something. Do you know the service, Tim?"

"They don't read the service until the grave is filled in," said Lean, pressing his lips to an academic expression.

"Don't they?" said the adjutant, shocked that he had made the mistake.

"Oh, well," he cried, suddenly, "let us—let us say something—while he can hear us."

"All right," said Lean. "Do you know the service?"

"I can't remember a line of it," said the adjutant.

Lean was extremely dubious. "I can repeat two lines, but—"

"Well, do it," said the adjutant. "Go as far as you can. That's better than nothing. And the beasts have got our range exactly."

Lean looked at his two men. "Attention," he barked. The privates came to attention with a click, looking much aggrieved. The adjutant lowered his helmet to his knee. Lean, bareheaded, he stood over the grave. The Rostina sharpshooters fired briskly.

What are the tone and mood of the passage?
A. The tone of the story is serious and the mood is one of anticipation.
B. The tone of the story is neutral and the mood is one of desperation.
C. The tone of the story is somewhat hopeful and the mood is cheerful.
D. The tone of the story is sympathetic and the mood is sorrowful.
E. The tone of the story is somewhat humorous and the mood is uneasy.

By donating a treasured fossil to a specimen collection, a scientist is collaborating with other investigators. Which of the following best explains why this might be true?A. Other scientists can provide security to prevent theft of a rare item.
B. Other scientists can see the specimen and offer suggestions and alternative interpretations.
C. Other scientists are forbidden to view the evidence themselves.
D. Other scientists are required to believe an unsupported theory.