Question

is a characteristic of all animals.
a. autotrophic
b. cell wall composed of cellulose
c. cell wall composed of chitin
d. heterotrophic
e. sessile
value: 6
mammals and birds are
a. endothermic
b. ectothermic
c. sessile
d. autotrophic
value: 6
the group of plants that are vascular but do not have seeds are called
a. gymnosperms
b. angisperms
c. asperma
d. ferms
e. bryophytes
f. porifera

Explanation:

• For the first question: Animals cannot produce their own food (unlike autotrophs like plants). They lack cell walls (so options b and c are out). Not all animals are sessile (e.g., dogs move). Heterotrophic means they get food from other sources, which is a universal animal trait.
• For the second question: Mammals and birds generate their own body heat (endothermic). Ectotherms rely on external heat. Sessile means fixed in one place (not mammals/birds). Autotrophic is for producers (not animals).
• For the third question: Ferns are vascular (have xylem/phloem) but reproduce via spores (no seeds). Gymnosperms and angiosperms have seeds. Bryophytes are non - vascular. Porifera are animals. Asperma is not a standard plant group in this context.

Answer:

1. d. Heterotrophic
2. a. Endothermic
3. d. ferns