Correct Answer: D. a waterproof cuticle, flight, small body size, and high reproductive rate
Explanation:
Insects became highly successful because several traits work together: a protective cuticle reduces water loss, wings help dispersal, small size allows use of tiny habitats, and rapid reproduction supports fast population growth.
Correct Answer: C. repeated body units that become modified for different functions
Explanation:
Segmentation provides a repeated structural plan. In insects, segments may become highly modified, fused, or specialized, especially in the head and thorax.
Correct Answer: B. a waterproof cuticle, flight, small body size, and high reproductive rate
Explanation:
Insects became highly successful because several traits work together: a protective cuticle reduces water loss, wings help dispersal, small size allows use of tiny habitats, and rapid reproduction supports fast population growth.
Correct Answer: B. repeated body units that become modified for different functions
Explanation:
Segmentation provides a repeated structural plan. In insects, segments may become highly modified, fused, or specialized, especially in the head and thorax.
Correct Answer: D. a waterproof cuticle, flight, small body size, and high reproductive rate
Explanation:
Insects became highly successful because several traits work together: a protective cuticle reduces water loss, wings help dispersal, small size allows use of tiny habitats, and rapid reproduction supports fast population growth.
Correct Answer: A. repeated body units that become modified for different functions
Explanation:
Segmentation provides a repeated structural plan. In insects, segments may become highly modified, fused, or specialized, especially in the head and thorax.
Correct Answer: D. jointed appendages and a chitinous exoskeleton
Explanation:
Insects are arthropods because they share jointed appendages, segmented bodies, and a chitin-based exoskeleton. These features distinguish them from chordates, echinoderms, and molluscs.
Correct Answer: A. epicuticle, exocuticle, and endocuticle
Explanation:
The insect cuticle includes an outer epicuticle and deeper procuticle regions such as exocuticle and endocuticle. This layered design provides protection, support, and resistance to water loss.
Correct Answer: A. jointed appendages and a chitinous exoskeleton
Explanation:
Insects are arthropods because they share jointed appendages, segmented bodies, and a chitin-based exoskeleton. These features distinguish them from chordates, echinoderms, and molluscs.
Correct Answer: C. epicuticle, exocuticle, and endocuticle
Explanation:
The insect cuticle includes an outer epicuticle and deeper procuticle regions such as exocuticle and endocuticle. This layered design provides protection, support, and resistance to water loss.
Correct Answer: B. jointed appendages and a chitinous exoskeleton
Explanation:
Insects are arthropods because they share jointed appendages, segmented bodies, and a chitin-based exoskeleton. These features distinguish them from chordates, echinoderms, and molluscs.
Correct Answer: D. epicuticle, exocuticle, and endocuticle
Explanation:
The insect cuticle includes an outer epicuticle and deeper procuticle regions such as exocuticle and endocuticle. This layered design provides protection, support, and resistance to water loss.