Echinodermata
1. Which of the following characteristics is true for all echinoderms?
A. Segmented body
B. Bilateral symmetry in adults
C. Water vascular system
D. Presence of a notochord
C. Water vascular system
1. Which of the following is a defining feature of all mammals?
A. Gills
B. Mammary glands
C. Feathers
D. Moist skin
B. Mammary glands
The symmetry in adult echinoderms is:
A. Bilateral
B. Radial
C. Asymmetrical
D. Spherical
B. Radial
The type of dentition seen in mammals is:
A. Homodont and polyphyodont
B. Heterodont and diphyodont
C. Homodont and monophyodont
D. Isodont and diphyodont
B. Heterodont and diphyodont
What is the nature of the echinoderm endoskeleton?
A. Chitinous
B. Cartilaginous
C. Made of calcareous ossicles
D. Made of silica
c. Made of calcareous ossicles
In mammals, which structure assists in respiration by increasing lung efficiency?
A. Operculum
B. Spiracles
C. Diaphragm
D. Gizzard
c. Diaphragm
Which of the following shows both bilateral and radial symmetry in its life cycle?
A. Starfish
B. Earthworm
C. Hydra
D. Cockroach
A. Starfish
The heart of a mammal is:
A. Two-chambered
B. Three-chambered
C. Four-chambered
D. Single-chambered
C. Four-chambered
6. The water vascular system in echinoderms primarily aids in:
A. Digestion only
B. Circulation of blood
C. Locomotion, feeding, and respiration
D. Reproduction
C. Locomotion, feeding, and respiration
Homoiothermy in mammals refers to:
A. Ability to live in water
B. Laying eggs
C. Constant body temperature
D. Breathing through skin
c. Constant body temperature