The order Crocodilia is composed of reptiles vertebrates that appeared more than 200 million years ago and are known as crocodiles.
crocodiles are animals ectothermic, with lung breathing, skin thick and keratinized that help these animals to live in a terrestrial environment.
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We prepared a list of exercises on the order Crocodilia so you can test your knowledge about the crocodile group.
You can check the template and save this list of exercises in PDF at the end of the post!
1) (UECE) Several characters bring birds closer to crocodiles than to mammals. Therefore, mammals have a more distant common ancestor with these two taxa. The structure that unites the three taxa considered in a single common ancestor is the (a):
a) amnion.
b) homeothermy.
c) apodism.
d) pneumatic bone.
2) (UEMS) Considering the evolutionary aspects of reptiles and the main characteristics presented by them, which enabled a better adaptation to the terrestrial environment, it can be said that feature:
a) endothermy and closed blood circulation.
b) internal fertilization with small eggs without yolk and endothermy.
c) breathing through lungs, porous bone structure, with less dense bones than other vertebrates.
d) eggs with shell adapted for the terrestrial environment, cornified skin more resistant to abrasion and water loss.
e) ectothermia and cutaneous respiration.
3) Crocodilians are reptiles belonging to the order Crocodilia that stand out for their size. Some reach the mark of 7 meters in length. Examples of crocodilians are:
a) snakes.
b) turtles.
c) two-headed snake.
d) alligators.
e) turtles.
4) Regarding the Reptilia Class, mark with (T) for true or (F) for false:
a) ( ) most reptiles excrete uric acid: less toxic than ammonia and quite soluble in water.
b) ( ) Jacobson's organ is found in venomous snakes.
c) ( ) the presence of muscles around the ribs of reptiles facilitates lung ventilation.
d) ( ) two-headed snakes are not snakes, nor are legless lizards.
e) ( ) the eggs of reptiles have amnion, yolk sac, allantois and chorion.
5) About the order Crocodilia, mark the incorrect alternative:
a) crocodilians, as well as other reptiles, have characteristics that allowed the conquest of the terrestrial environment.
b) crocodilians are carnivorous animals.
c) crocodilians have indirect development.
d) the body of crocodilians has reinforced plate-like scales.
e) crocodilians can be found living in large river basins.
6) (UFT) The transition of living beings from water to land took millions of years to happen. During this period, a series of changes gradually adjusted the structural plan of organisms, allowing the resolution of problems of adaptation to the terrestrial environment. The terrestrial environment offers advantages such as greater availability of oxygen and exposure to solar radiation. On the other hand, low water availability increases the risk of dehydration and imposes restrictions on species reproduction.
Among the events that allowed the successful transition of living beings from the aquatic to the terrestrial environment, analyze those mentioned below.
I – The emergence of the amniotic egg.
II – The appearance of the pollen tube.
III – The presence of a kidney that excretes ammonia.
IV – The presence of dry and keratinized skin.
Which of the above statements are true:
a) I, II, III and IV.
b) I, III and IV.
c) I, II and IV.
d) I, II and III.
e) none of the above alternatives.
7) Crocodilians differ from other reptiles in terms of their cardiovascular system. In this group, there is the presence:
a) of two hearts.
b) a heart with three chambers, as in amphibians.
c) a heart with three chambers, as in birds.
d) a heart with four chambers, as seen in birds and mammals.
e) a heart with five chambers, as it occurs in fish.
8) Regarding the classification of Reptiles, complete the sentences using the words listed below.
Squamata – Chelonia – Crocodilia – Rhyncocephalia
a) The Order _____________ gathers animals endemic to New Zealand: the tuataras.
b) The Order _____________ gathers, among other animals, gharials and alligators.
c) The Order _____________ includes both aquatic and terrestrial species.
d) The Order _____________ gathers lizards, serpents and blind snakes.
9) Crocodiles are animals belonging to the class Reptilia and Order Crocodilia. About their body temperature we can say that they are:
a) endothermic.
b) terrestrial ectotherms.
c) aquatic ectotherms.
d) exothermic.
10) What is the structure of the heart of crocodiles called the Forame de Panizza used for?
a) The foramen of Panizza serves to mix arterial blood with venous blood, allowing long dives without breathing.
b) The foramen of Panizza serves to regulate the body temperature of the animal.
c) The foramen of Panizza makes the animal float in the water.
d) The Panizza foramen is responsible for the animal's state of alert if it encounters a predator.
1 – the
2 – d
3 – d
4 – F, F, V, V, V
5 – c
6 – c
7 – d
8 – a) Rhyncocephalia; b) Crocodylia; c) Chelonia; d) Squamate
9 – c
10 – the
Click here to download this list of exercises on the order Crocodilia in PDF!
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