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WorksheetsMangroves, Estuaries, Sharks, Sirenia
Total questions: 56
Worksheet time: 34mins
Name
Class
Date
1.
Sharks have to swim in order to breathe and do not sleep
a)
true
b)
false
2.
shark teeth are replaceable
a)
true
b)
false
3.
manatees have a compartmentalized stomach like a cow
a)
true
b)
false
4.
the olfactory lobes of the manatees and sharks brain are used for sight
a)
true
b)
false
5.
sharks change sexes like other reef fish
a)
true
b)
false
6.
Manatees usually have one offspring every spring
a)
true
b)
false
7.
Manatees have only molar teeth
a)
true
b)
false
8.
manatees are no longer on the endangered species list
a)
true
b)
false
9.
teeth can be used to identify species of sharks
a)
true
b)
false
10.
the nostrils of sharks and whales lead to the brain
a)
true
b)
false
11.
whales and sharks have live births
a)
true
b)
false
12.
one species of the manatee is already extinct
a)
true
b)
false
13.
nurse sharks will not bite humans
a)
true
b)
false
14.
the jaws of a shark are not attached to the face
a)
true
b)
false
15.
a rising tide will cause a salt wedge to move into the estuary
a)
true
b)
false
16.
sharks do not have a swim bladder
a)
true
b)
false
17.
sharks must swim upwards to counteract their weight
a)
true
b)
false
18.
sharks largest organ is the stomach
a)
true
b)
false
19.
manatees have only molar teeth
a)
true
b)
false
20.
the spiral valve in a shark helps grind food
a)
true
b)
false
21.
the shark niche is a consumer who job is to eat the weak, sick, old and injured animals in the ocean
a)
true
b)
false
22.
the heart is larger than the brain in sharks, but in humans the brain is larger
a)
true
b)
false
23.
a sharks gender can be identified by its
a)
size
b)
shape of teeth
c)
pelvic fins
d)
reproductive structures
24.
the basis of the food chain in estuaries is
a)
detritus
b)
plankton
c)
nekton
d)
plants
25.
which is a characteristics of the manatees
a)
very social
b)
carnivores
c)
communicate by whistles and clicks
d)
have no hair
26.
what difference has the marine mammals protection act had on the shark population
a)
the shark population is protected by law
b)
by protecting their food supply, the shark population has increased
c)
humans are eating more sharks resulting in a declining shark population
d)
an increase in marine mammals has resulted in heavy predation against sharks
27.
the myth about manatees resembling mermaids earned the name of the
a)
genus
b)
taxonomic class
c)
species
d)
taxonomic order
28.
the U.S. has over 900 estuaries which are mostly the result of
a)
mangrove communities
b)
barrier islands
c)
fjords
d)
deltas
29.
the greatest threat to the survival of the manatee is from
a)
predators and parasites
b)
lack food
c)
hunting by humans
d)
accidents with boats
30.
manatees keep warm
a)
with blubber
b)
with short dense fur
c)
friction generated from swimming
d)
counter current heat exchange
31.
shark attacks on humans are usually the result of
a)
invading a sharks territory
b)
previous grudge
c)
mistaken identity
d)
protecting their young
32.
estuaries are a transition zone between
a)
warm and cool water
b)
shallow and deep water
c)
turbid and clear water
d)
salt water and freshwater
33.
which animal is most closely related to the manatee
a)
cow
b)
whale
c)
elephant
d)
shark
34.
the tail on a manatee resembles the tail of a
a)
alligator
b)
whale
c)
shark
d)
mackerel
35.
manatees are a benefit to rivers because they
a)
keep channels clear of vegetation
b)
feed on harmful insects are a tourist attraction
c)
mix the surface water
d)
feed on red tide organisms
36.
the lateral line system, including pores in the face, is used to
a)
maintain balance
b)
detect movement
c)
for smelling
d)
excrete salt
37.
the major characteristic separating fishes from whales is
a)
teeth and jaw
b)
position of the tail
c)
swimming ability
d)
skeleton
38.
estuaries have
a)
low productivity and low biomass
b)
high productivity and low biomass
c)
high productivity and high biomass
d)
low productivity and high biomass
39.
when a shark is resting on the bottom or when its mouth is full of food, what structure is used to aid in respiration
a)
spiracles
b)
spiral valve
c)
nostrils
d)
pores around face
40.
when a shark loses a tooth,
a)
it can not replace the tooth
b)
it grows a new one
c)
another tooth rotates into the front row
d)
it depends on the age of the shark
41.
which is NOT part of the typical shark behavior before and during an attack
a)
using the head to shake the prey from side to side
b)
lowering the pectoral fins from a horizontal position to more vertical
c)
upper eyelid dropping down to close the eye
d)
circling the prey
42.
how many chambers in a sharks heart
a)
three
b)
one
c)
four
d)
two
43.
estuaries are important because
a)
they are the breeding ground for whales
b)
have deep water with plenty of producers
c)
they trap nutrients from the ocean
d)
90% of marine animals spend some part of their life there
44.
which is not a characteristic of the estuary
a)
high nutrient content
b)
salinity fluctuation
c)
shallow water with low predation
d)
stable bottom with low sediment
45.
how many chambers in a manatees heart
a)
three
b)
five
c)
four
d)
one
46.
sharks are closely related to
a)
rays
b)
mackerel
c)
dolphins
d)
tuna
47.
which is not an estuary
a)
a sea grass community
b)
a sandy beach
c)
mud flat
d)
salt marsh
48.
the major characteristic separating sharks from other fish is their
a)
swimming ability
b)
teeth and jaw
c)
position of the tail
d)
skeleton
49.
the largest shark is the
a)
great white
b)
whale shark
c)
hammerhead
d)
tiger shark
50.
the organisms that have the lease trouble with salinity in estuaries
a)
stenohaline epifauna
b)
stenohaline infauna
c)
euryhaline epifauna
d)
euryhaline infauna
51.
salt glands found on mangroves function to
a)
collect salt for the tree
b)
excrete salt taken in by the tree
c)
help retain moisture in the leaves
d)
keep insects from eating the leaves
52.
the reproduction of mangrove trees is specialized in that they have
a)
alternating sexual and asexual stages
b)
both polyp and medusa stages
c)
a floating fruit
d)
seeds that germinate on the tree
53.
pneumatophores are an advantage to mangrove trees because they
a)
sting predators
b)
provide nesting sites
c)
provide support and bring oxygen into anaerobic soils
d)
vacuum in plankton
54.
which is the pioneer mangrove tree
a)
buttonwood
b)
black
c)
white
d)
red
55.
mangrove are critical because they
a)
provide oxygen
b)
roots hold the reefs together
c)
trap sediments and keep them off the corals
d)
provide nutrients for all reef dwellers
56.
which is legal in the US?
a)
removing mangroves
b)
collecting corals
c)
fishing in the marine parks
d)
collecting sponges
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