FIRST NAME _______________________ INITIAL ______

Put a circle around the number next to each correct answer.

I. When young, a little crab looks quite unlike its parents. As it grows older, it drops its outer covering time and again and grows a new one. With each new coat it comes to look more and more like its parents, until finally it appears in a shell with its legs and claws just like its parents. When this stage has been reached, it continues to drop its covering several more times, but the change is in its size, not its form. While the old shell is being made ready to come off, there is a new shell forming over the flesh of the crab underneath, but it is quite soft and flexible until the old one has been dropped.

A. This story is mainly about -

1. how little crabs look.

2. the resemblance between little crabs and their parents.

3. how often crabs change their coats.

4. the way that crabs get bigger.

B. Crabs drop their coats -

1. throughout their lives.

2. as they get bigger.

3. to change their size but not their form.

4. to be separate from their parents.

C. The form of a grown-up crab -

1. is just like its parents.

2. is like the form of a baby crab.

3. continues to change every time it gets a new coat.

4. changes every time its size changes.

D.The new shell -

1. starts to grow after the old one has been dropped.

2. is always hard.

3. is soft so that the crab can squeeze out of its old shell.

4. is always a copy of the young crab's parents' shell.

II. The West Indian Land Crab makes its home two or three miles from the sea. When the females wish to lay their eggs, they do not carry them attached to their bodies, as most crabs do. Instead, they make their way back to the sea to lay them in the sand. All of them go at once, together, the males leading the way. There may be enough to form a host a mile long and forty yards wide. Houses and walls and cliffs do not stop them. They never turn aside but keep straight on until, if they survive, they reach the sea.

A. This story is mainly about -

1. where the West Indian Land Crab makes its home.

2. the egg-laying behavior of a certain type of crab.

3. a host a mile long.

4. a terrible trek to the sea.

B. The West Indian Land Crab -

1. lives its life next to the sea.

2. lays its eggs on the seaside.

3. carries its eggs next to its body.

4. lays its eggs several miles from the sea.

C. The trek to the sea -

1. can be dangerous.

2. is for females only.

3. is safe, since there are so many.

4. allows the crabs to stop and rest.

D. The word "host" is this story refers to -

1. a large group.

2. a group on the attack.

3. a group of females.

4. a powerful group.

III. One of the strangest crabs, called "birgus latro" by scientists, is one that lives on coconuts. It makes its home by burrowing deep among the roots of a coconut tree. Its food comes from the coconuts that fall from the tree. Taking a fallen nut, it strips off some fiber with its great claws and hammers away at the coconut until an opening is made. Through this opening the crab thrusts its smaller claws and drags out the "meat" of the coconut. It might even thrust in a claw and swing the coconut and smash it on the ground. This crab is used by the natives for food. As much as a quart of coconut oil can be obtained from one crab.

A. This story is mainly about -

1. the power of birgus latro.

2. the way that a certain type of crab obtains its food.

3. a way to obtain coconut food.

4. birgus latro.

B. The oil in this crab comes from -

1. the roots of coconut trees.

2. birgus latro.

3. coconuts.

4. the island on which this crab lives.

C. This crab makes its home -

1. by thrusting its claw into a coconut.

2. among the roots of a coconut tree.

3. by burrowing deep into a coconut.

4. safe from natives who want it for food.

D. The word "natives" refers to -

1. people who live on crabs.

2. people who live in an area.

3. people who lack skill and knowledge.

4. people who take coconut oil from crabs.

IV. Like oysters, mussels attach themselves to rock. First, the mussel attaches its foot, which acts as a sucker, to a rock. This is only temporary. Then, strands of a silk-like texture, called a byssus, are put forth by the mussel and woven into a sort of string.This holds to the rock. Mussels collect in great masses. The byssus of one mussel joins the byssus of another until they are all joined together.Heavy waves can beat upon them, but they hold their positions in safety.

A. This story is mainly about -

1. the life of mussels.

2. the byssus of mussels.

3. mussels and oysters.

4. how mussels hold onto rocks.

B. A byssus is -

1. the foot of the mussel.

2. the mussel's tie to rock.

3. a piece of string.

4. a large group of mussels.

C. Mussels can hold onto rocks because -

1. the "foot" holds them.

2. they are all joined together.

3. they are joined by pieces of string.

4. the waves beat upon them.

D. The "foot" of the mussel -

1. is used for walking.

2. has a sucker on it.

3. makes the byssus.

4. joins with other mussels.

V. Lobsters are "crabby," just like crabs. By "crabby" we mean "always ready to fight." It is common for a lobster to lose a claw in a fight. However, the lobster can always grow a new claw to replace the one that has been lost. The new claw is smaller than the old one, at least at first. After the lobster continues to grow and to lose its shells one after another, the new claw in time gets to be as large as the one that has been lost. Then the lobster can fight again just as well as it did before it lost the claw.

A. This story is mainly about -

1. crabs and lobsters.

2. a lost claw.

3. how lobsters grow a new claw.

4. the lobster's readiness to fight.

B. "Crabby" means -

1. unhappy.

2. dissatisfied.

3. easily irritated.

4. annoying.

C. Once a claw has been lost, the lobster -

1. can never fight again.

2. is helpless.

3. can grow a new one.

4. right away gets another just as good.

D. A lobster's shell -

1. grows bigger as the lobster inside grows bigger.

2. stays the same for the life of the lobster.

3. is hard so that the lobster doesn't need to fight.

4. is dropped when the lobster inside gets too big.