How do living things have children?
Options:
- (A) death
- (B) people
- (C) humans
- (D) babies
- (E) it needs them
- (F) reproduction
- (G) mitosis
- (H) production
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Let's think first: Reproduction is the process by which living things give rise to offspring. Seed refers to offspring, children. Living things use reproduction to have children.... So the answer is [(F)]

What group of animals do chordates belong to?
Options:
- (A) graptolites
- (B) more abundant
- (C) warm-blooded
- (D) four limbs
- (E) epidermal
- (F) Vertebrates
- (G) animals
- (H) insects
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Let's think first: Chordates have a complete digestive system and a closed circulatory system. Vertebrates have a closed circulatory system. Chordates are vertebrates.... So the answer is [(F)]

What detects hybrids of the substance that helps assemble proteins?
Options:
- (A) orchids
- (B) sensory neurons
- (C) peachleaf willow
- (D) luminometer
- (E) A computer
- (F) animals
- (G) A Greek letter
- (H) scattered light
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Let's think first: DNA contains genetic instructions for proteins, and RNA helps assemble the proteins. RNA hybrids are then detected by a luminometer. A luminometer detects hybrids of the substance that helps assemble proteins.... So the answer is [(D)]

What can make lungs more at risk for infection by streptococcus?
Options:
- (A) Allergies
- (B) bacteria
- (C) Pollution
- (D) injury
- (E) fungi
- (F) sweating
- (G) the skin
- (H) smoking
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Let's think first: Pneumonia may be caused by an infection or injury of the lungs. Streptococcal pneumonia is caused by the bacteria Streptococcus pneumoniae. Streptococcus can infect the lungs following injury.... So the answer is [(D)]

Something more complex in eukaryotes than prokaryotes leads to what?
Options:
- (A) harm them
- (B) sweating
- (C) Growth
- (D) illness
- (E) fever
- (F) parasites
- (G) death
- (H) recycling
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Let's think first: Cell division is more complex in eukaryotes than prokaryotes. Cell division leads to the growth of cells in the population. Something that leads to growth is more complex in eukaryotes than prokaryotes.... So the answer is [(C)]

The basic functioning unit of life all share the same what?
Options:
- (A) structure
- (B) four limbs
- (C) organ
- (D) Chlorophyll
- (E) Energy
- (F) layers of fat
- (G) health
- (H) Energy.
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Let's think first: All cells share some of the same structures and basic functions. Cells are also the basic functioning unit of life. The basic functioning unit of life all share the same structures.... So the answer is [(A)]