Question:
Which of the following can provide the human body with long-term immunity against some diseases?
OPTIONS:
- antibiotics
- vitamins
- vaccines
- red blood cells
Answer:
vaccines
Question:
What is a galaxy?
OPTIONS:
- a moon that orbits a planet
- a planet that orbits the Sun
- a very large system of stars that is held together by gravity
- a very large system of planets that is held together by the Sun
Answer:
a very large system of stars that is held together by gravity
Question:
What do scientists mean when they refer to a population?
OPTIONS:
- all the organisms in an ecosystem
- all the species that share similar anatomical features
- all the animals that acquire resources through similar methods
- all the interbreeding members of a certain species in an ecosystem
Answer:
all the interbreeding members of a certain species in an ecosystem
Question:
Visible light passes through glass. Other types of electromagnetic radiation are able to pass through other materials in a similar way. Which of the following are used in medical technology because they can pass through some parts of the human body?
OPTIONS:
- x-rays
- infrared waves
- microwaves
- ultraviolet rays
Answer:
x-rays