MCQs
Read every question, see the correct answer, and understand the explanation at your own pace. Study mode has no timer and no negative marking.
Correct answer
D. Blood
Explanation
Blood is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
A. Pituitary
Explanation
Pituitary is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
B. Artificial selection
Explanation
Artificial selection is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
A. 5
Explanation
Earth’s atmosphere is divided into five main layers: the exosphere, the thermosphere, the mesosphere, the stratosphere and the troposphere.
Correct answer
D. Photosphere
Explanation
The part of the Sun commonly called its surface is the photosphere. The word photosphere means “light sphere” – which is apt because this is the layer that emits the most visible light. It’s what we see from Earth with our eyes.
Correct answer
B. 4 Minutes
Explanation
4 Minutes is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
A. Yellow-Green
Explanation
Yellow-Green is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
B. The Sun lights up only one half of the Moon and as the Moon orbits the Earth we can sometimes see the unlit side of the Moon.
Explanation
The Sun lights up only one half of the Moon and as the Moon orbits the Earth we can sometimes see the unlit side of the Moon. is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
C. More
Explanation
Males are usually the most colorful sex because females are more likely to be in short supply due to the extra work involved in incubation and chick rearing. Males must thus compete for the chance to mate with them.
Correct answer
A. Store Food
Explanation
Store Food is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.