Answer:
1. The correct answer would be A. The fact that the bone structures are similar supports the theory that the animals shared a common ancestor.
Homologous structures refer to the organs or structures which are similar in structure but perform different functions as a result of adaptation towards different ecosystems.
2. The correct answer would be B. Eukarya
The organism contains a nucleus and other organelles including chloroplast. Thus, it can be correctly placed in Eukarya (eukaryotes).
3. The correct answer would be C. Plants have a two-part life cycle, spending part of their lives in a diploid phase and part in a haploid phase; humans spend their lives in a diploid phase and produce gametes that are haploid.
Plants usually show alternation of a generation that is, two-part life cycle. Humans do not show alternation of generation. They are diploid organisms which produce haploid gametes for reproduction.
4. The correct answer would be A. to defend the body from invading pathogens
The immune system is a defense system of our body. It protects our body from infections and toxins. It includes organs like thymus, lymph nodes, bone marrow et cetera.
5. The correct answer would be B. Plants produce glucose that can be broken down by cellular respiration; animals digest foods to obtain glucose for use in cellular respiration.
The energy demands of animals, as well as plants, are met by the process called cellular respiration. Glucose is the major substrate for this process. Plants are able to synthesize glucose through photosynthesis however, animals need to digest food to obtain glucose.
