Page 105 - MODUL TOEC - P2B UIN SUKA

PASSAGE THREE (Questions 10-14)

Different types of relationships exist between living things. One type of relationship is
parasitism, in which one partner benefits while the other loses. A very different type of
relationship is symbiosis, in which both partners benefit.
An example of a parasitic relationship exists between the stone crab and sacculina, a
type of barnacle. The sacculina attaches itself to the stone crab. It then eats into the crab,
and the stone crab becomes disabled.
An example of a symbiotic relationship exists between the hermit crab and the
calliactis anemone. The anemone attaches itself to the crab, but it is not a parasite because it
does not harm the crab; it feeds on food that is dropped by the crab. The anemone even
helps the crab by protecting the crab from other predators with its tentacles.

10. The subject of this passage is 13. The calliactis anemone
(A) two different kinds of (A) is a parasite
relationships between living (B) harms the hermit crab
things (C) eats into the hermit crab
(B) parasitic relationships (D) assists the hermit crab
(C) relationships that are mutually
beneficial to living things 14. Which of the following can be
(D) symbiosis inferred from the passage?
(A) All crabs are involved in
11. Which of the following is NOT true parasitic relationships.
about parasitic relationships?
(B) All crabs are involved in
(A) There are two partners in a symbiotic relationships.
parasitic relationship. (C) Some crabs are involved in
(B) One partner in a parasitic symbiotic relationships, while
relationship hurts the other. others are not.
(C) The stone crab can be part of a (D) Crabs are involved in neither
parasitic relationship. parasitic nor symbiotic
(D) A parasitic relationship is relationships.
usually symbiotic.

12. According to the passage, what does
sacculina eat?

(A) The stone crab
(B) Barnacles
(C) Food dropped by the crab
(D) Other parasites

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