All organisms need a place to live that provides
protection, sunlight, and water.
sunlight, food, and water.
food, water, and protection.
protection, food, and sunlight.

Abnormal softening of a gland is known as

Natural selection changes allele frequencies because some survive and reproduce more successfully than others.

Ihave no idea how to solve these. plus there's another question that is 2) a 10 kilogram meteorite is collected in space and brought back to earth. it is composed of 1.25 kg of uranium-238 and 8.75 kg of lead-206. how many u-238 half lives have passed? what is the approximate age of the meteorite?