Classification of Animals Test - 9

Amphibians are the organisms which can survive partly on land and partly in the water. This makes them special for the evolutionary studies too.

For example, frog.

So, the correct option is A

Aves generally include birds. They have feathers to maintain a constant temperature. The beaks help in feeding. They are generally oviparous and lay eggs. They have air spaces in the lungs which provide buoyancy during flight.

So, the correct answer is option D.

Amphibians are the organisms that live both on land and water. The frog is also able to survive both on land and water. It lays eggs in water and they hatch to give a larval stage called tadpole. The tadpoles on complete development metamorphose to form adult frog which is able to survive both on land as well as water.

So, the correct answer is 'It lives both on land and water'.

Renal portal system is an arterial portal system, in which different glomerular arterioles receive blood from the capillaries of the renal glomeruli and carry it to the peritubular capillary plexus surrounding the proximal and distal convoluted tubules.
All reptiles possess renal portal system.
Oryctolagus and Lepus are rabbit, being a mammal, does not possess this portal system. Pavo is peacock, Columba is pigeon (birds).
Pteropus is bat while Rattus are rodents, being mammal none of them possess renal portal system.
Therefore, the correct answer is option D.

A) Parrots do not have a urinary bladder.

B) Birds do not have a urinary bladder or external urethral opening and (with exception of the ostrich and related species). Uric acid is excreted along with feces as a semisolid waste. 

C) American Rhea is one of the few birds that possess a urinary bladder.

D) The urinary bladder is present in Ostrich and American Rhea.

So the correct answer is 'Both B and C'.

Many extinct species had biological characteristics of two or more biological species during evolution. Such types of species are connecting links.

Similarly, Seymouria is also an extinct species which is connecting link between amphibians and reptiles. As Seymouria's head structure was similar to amphibians but the body structure was similar to reptiles

So, the correct answer is (a).

Waterdogs ( genus Necturus) exhibit mandatory neoteny , that is they lose their ability to metamorphose.

Axolotl (Ambystoma mexicana) show conditional neotony or paedogenisis, that is, they metamorphose when administered with thyroid hormone.

Midwife toads (Alytes) are a genus of frogs, and characteristic of these toad-like frogs is their parental care, the males carry a string of fertilised eggs on their back, hence the name "midwife". 

The parotoid gland  is an external skin gland on the back, neck, and shoulder of toads and some frogs. It can secrete a number of milky alkaloid substances (depending on the species) known collectively as bufotoxins, which act as neurotoxins to deter predation. These cutaneous glands are called parotoid as they are somewhat similarly positioned to mammalian parotid gland.

So, the correct option is 'Bufo - Lack parotid gland'

King Cobra belongs to group Reptilia, which shows 3 chambered heart (two auricles and one ventricle). All reptiles have three chambered heart except crocodile. Thus, the correct answer is option A.

Snake bites affects the nervous system at the places where nerves connect to muscles, thereby failure of nerves. It also affects the circulatory system by causing destruction of RBCs or causing blood clotting. 

Therefore, the correct answer is option D.

The furcula also known as wishbone or 'merry thought bone' is a forked bone which is a V-shaped found in birds and some other animals and is formed by the fusion of the two clavicles and single interclavicle. In birds, its main function is in the strengthening of the thoracic skeleton to withstand the rigors of flight. So, the correct option is C

The presence of feathers is the most distinguishing feature of all birds. Feathers are highly modified scales that help the wings generate thrust and lift. They also streamline the body to reduce drag as the bird travels through the air. Since the bird bones are hollow (pneumatic bones), they also reduce weight. Birds have keeled sternum bones for the attachment of enormous muscles that power their wings, and a special bone called as the semilunate carpal that allows them to flap their wings efficiently. All birds have a special system of airways throughout their skeletons and a four-chambered heart. These organ systems provide the flight muscles with a steady supply of oxygen-rich blood that prevent their wings from becoming exhausted while the bird is in the air.

So, the correct option is D

All vertebrates possess a muscular chambered heart. Amphibians and the reptiles (except crocodiles) have a 3- chambered heart with two atria and a single ventricle. There is an incomplete separation of ventricles due to a hole in the septum that separates ventricles. 

So, the correct option is A

Lizards are oviparous. They lay eggs. They belong to class Reptilia. They mostly breed during spring.

So, the correct answer is 'Laying eggs'

Characteristics of class Reptilia are as follows:

Hard, horny scaly skin, four legs and breathe with lungs.

Three-chambered heart (crocodiles have a four-chambered heart), breathe through lungs, cold-blooded or poikilothermic.

Eggs have a leathery shell.

Unisexual, oviparous, fertilization is internal.

For example, turtle, chameleon, snakes, lizards etc.

So, the correct answer is option D.

Frogs belong to a group of animals called as amphibians. Amphibian means two-lives. Frogs begin their lives in the water as eggs and then tadpoles and when they are fully developed, they live on land. Scientists believe that there are more than 4,000 different kinds of amphibians on Earth. Toads, newts, salamanders and caecilians (blind worms) are also members of the amphibian group. Whale, fish and horse are not amphibians. 

So, the correct option is C