2023
Bone is composed primarily of which inorganic material?
a. calcium
b. phosphorus
c. collagen
d. potassium - ANS
Calcium
Calcium is the most abundant mineral found in bones, as well as in the entire
body .
Which of these is a biome?
a. desert
b. cornfield
c. hear of bison
d. beehive - ANS
Desert
A biome is a large ecological community that includes specific plants and
animals, such as a desert. Which planet orbits closest to Earth?
a. Mercury
b. Venus
c. Jupiter
d. Saturn - ANS
Venus
Venus's orbit is closest to Earth. V enus is the second planet from the sun, and
Earth is the third planet from the sun.
What is the name of the phenomenon when a star suddenly increases in
brightness and then disappears from view?
a. aurora
b. galaxy
c. black hole
d. supernova - ANS
Supernova
Before a star collapses, the star burns brighter for a period of time and then fades
before view . This is a supernova.
Which organism has cells that contain mitochondria?