Which of the following problems are faced by terrestrial animals?
a) dehydration due to evaporation
b) excess salt in their body
c) swelling due to more water
d) all of these
Explanation: it is due harsh conditions and scarcity of water
Which of the following invertebrates are the successful groups of invertebrate animals which best adapt to the terrestrial environment?
a) mollusks
b) crustaceans
c) arthropods
d) echinoderms
Explanation: presence of exoskeleton, which makes them versatile, is protective in nature and also allows flexibility and mobility.
Which of the following vertebrates are the successful groups of vertebrate animals which best adapt to the terrestrial environment?
a) reptiles
b) birds
c) mammals
d) all of these
Arthropods are the most successful group of invertebrates living in terrestrial environment; which structure helps them in this regard?
a) their segmented legs
b) light weight body
c) chitineous exoskeleton
d) their digestive tract
Explanation: Chitinous exoskeleton is impermeable to water and protects the insect from desiccation.
Mammals are the most successful group of vertebrates living in terrestrial environment; which structure helps them in this regard?
a) keratinized skin
b) salivary glands
c) endoskeleton
d) their respiratory tract
Explanation: Keratinized epithelium refers to an outer layer of skin cells that has become hardened and died.
In mammals, which animals are much resistant to dehydration?
a) forest mammals
b) fresh water mammals
c) desert mammals
d) marine mammals
Explanation: Desert Mammals · Raccoon · Red Kangaroo · Rhinoceros · Ringtailed Cat · River Otter · Sea Lion - California · Shasta Ground Sloth (extinct) · Skunk
