Hummingbirds are what they are today as a necessary consequence of their relationship to what?
Options:
- (A) a feeder
- (B) humans
- (C) bees
- (D) survival
- (E) animals
- (F) Plants
- (G) Earth
- (H) weeds
--
Let's think first: Some birds are pollinators that co-evolved with plants. Hummingbirds are the most common bird pollinators. Hummingbirds co-evolved with plants.... So the answer is [(F)]

Which item found in the human body is smaller?
Options:
- (A) the eyes
- (B) Epidermis
- (C) all matter
- (D) Fingernail.
- (E) Inches
- (F) Baby tooth.
- (G) Small eyelash.
- (H) Neuron.
--
Let's think first: Cells vary in size as well as shape, but all cells are very small. Neurons are cells that are similar to other cells. Neurons are very small in size.... So the answer is [(H)]

What is caused by a reduction of a hormone that helps cells absorb sugar from the blood?
Options:
- (A) Dehydration
- (B) anemia
- (C) diabetes
- (D) glucose
- (E) cancer
- (F) fever
- (G) low blood sugar
- (H) strokes
--
Let's think first: Insulin is a hormone that helps cells absorb sugar from the blood. Diabetes is caused by a reduction in insulin or a resistance to insulin. Diabetes is caused by a reduction of a hormone that helps cells absorb sugar from the blood.... So the answer is [(C)]

Fungi are the only organisms that can decompose dead what?
Options:
- (A) fossils
- (B) legumes
- (C) trees
- (D) matter
- (E) amoeba
- (F) coal
- (G) elms
- (H) bamboo
--
Let's think first: Fungi are the only organisms that can decompose wood. Wood comes from trees. Fungi are the only organisms that can decompose dead trees.... So the answer is [(C)]

What attracts insects?
Options:
- (A) bushes
- (B) orchids
- (C) food
- (D) animals
- (E) pollinators
- (F) seeds
- (G) pollen
- (H) flowers
--
Let's think first: Flowers attract pollinators, and fruits encourage animals to disperse the seeds. Insect Pollinators Learn about pollination and why insect pollinators are important in the garden. Flowers attract insects.... So the answer is [(H)]

What do viruses contain?
Options:
- (A) electromagnetic energy
- (B) light energy
- (C) resistance
- (D) contamination
- (E) Deoxyribonucleicacid
- (F) Chemical energy
- (G) harmful substances
- (H) Leptospirosis
--
Let's think first: Viruses contain DNA but not much else. DNA stands for Deoxyribonucleicacid. Viruses contain Deoxyribonucleicacid but not much else.... So the answer is [(E)]