question: Where does energy enter into in the form of sunlight and chemical compounds?
Options:
- (A) sun
- (B) science lab
- (C) biomes
- (D) orchids
- (E) photons
- (F) deserts
- (G) black hole
- (H) trees
answer: Energy enters ecosystems in the form of sunlight or chemical compounds. Biomes are global ecosystems. Energy enters biomes in the form of sunlight or chemical compounds.
The answer is (C)

question: What can fatty acids be combined with, in addition to carbon and oxygen?
Options:
- (A) Sodium
- (B) Energy.
- (C) glucose
- (D) Carbon Dioxide
- (E) Fuel cells
- (F) Uranium
- (G) Hydrogen
- (H) Energy
answer: Lipids may consist of fatty acids alone, or they may contain other molecules as well. Lipids Lipids are also composed of carbon, oxygen and hydrogen. Carbon, oxygen, and hydrogen can be combined with fatty acids.
The answer is (G)

question: What are chromosomes made of?
Options:
- (A) Deoxyribonucleicacid, protein
- (B) sulfuric acid, fat
- (C) Chemical energy
- (D) protein, hydrobromic acid
- (E) boric acid, protein
- (F) Something that comes in a bundle of fibers
- (G) sub-units of species
- (H) A compound that donates proton
answer: Chromosomes are coiled structures made of DNA and proteins. DNA stands for Deoxyribonucleicacid. Chromosomes are coiled structures made of Deoxyribonucleicacid and proteins.
The answer is (A)

question: Changing in animals occurs by a process called what?
Options:
- (A) world climate change
- (B) It helps them survive
- (C) natural selection
- (D) Leptospirosis
- (E) ozone
- (F) relocation
- (G) permineralization
- (H) animal growth
answer:
Evolution occurs by a process called natural selection. Actually, evolution is adaptation to change. Changing occurs by a process called natural selection.
The answer is (C)