The vascular cambria allows:
Options:
- (A) Exfoliation
- (B) roots to grow
- (C) plant
- (D) movement
- (E) Animal survival
- (F) soil
- (G) liver
- (H) rapid expansion
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Let's think first: Roots grow in length and width from primary and secondary meristem. Vascular cambium is a primary meristem. Roots grow in length and width from the vascular cambium.... So the answer is [(B)]

What do organisms cluster around in the ocean floor?
Options:
- (A) kalenchoes
- (B) ferns
- (C) bacteria
- (D) Chimneys
- (E) an object
- (F) alveoli
- (G) graptolites
- (H) allow growth
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Let's think first: Organisms cluster around hydrothermal vents in the ocean floor. Chimneys top some hydrothermal vents. Organisms cluster around chimneys in the ocean floor.... So the answer is [(D)]

Damaged dna might benefit from:
Options:
- (A) resistance
- (B) cellular repair
- (C) mutagens
- (D) UV rays
- (E) recovery
- (F) radiation
- (G) Electrical energy
- (H) flow of electrons
--
Let's think first: Cells have multiple repair mechanisms to fix mutations in DNA. And if the damaged DNA is duplicated, it causes mutation. Cells have multiple repair mechanisms to fix damaged DNA.... So the answer is [(B)]

Fungi spores can multiply through what?
Options:
- (A) natural selection
- (B) trees
- (C) mitosis
- (D) sun's heat
- (E) death
- (F) Conifers
- (G) Deposition
- (H) pregnancy
--
Let's think first: Fungi spores can develop into new haploid individuals without being fertilized. Haploid cells multiply asexually through mitosis. Fungi spores can multiply through mitosis.... So the answer is [(C)]

What kind of worm belongs to the phylum platyhelminthes?
Options:
- (A) homogenous
- (B) moves
- (C) dangerous
- (D) insects
- (E) tapeworm
- (F) parasites
- (G) white
- (H) graptolites
--
Let's think first: Flatworms belong to the phylum Platyhelminthes. Flatworms Flatworms or Platyhelminthes include flukes, tapeworms, and turbellarians. Tapeworms belong to the phylum Platyhelminthes.... So the answer is [(E)]

What is secreted by organisms like frogspawn to become a reef?
Options:
- (A) exocrine glands
- (B) food and shelter
- (C) exoskeleton
- (D) bones
- (E) Energy
- (F) Chemical energy
- (G) plasma
- (H) Energy.
--
Let's think first: Many corals secrete an exoskeleton that builds up to become a coral reef. Good examples are Bubble coral, Elegance coral, Frogspawn and other Euphyllia corals. Organisms like frogspawns secrete an exoskeleton that builds up to become a reef.... So the answer is [(C)]