A. to complement gills while in water B. to complement gills while on land C. while on land D. while…
A. birds and reptiles B. fishes and birds C. reptiles and fishes D. birds and molluscs Correct Answer: Option A…
A. sperm B. egg C. embryo D. zygote Correct Answer: Option D - zygote Explanation Human fertilization is the union…
A. adaptation B. evolution C. variation D. succession Correct Answer: Option C - variation Explanation Variation, in biology, any difference…
A. Two atoms share electrons so they can fill their outer shells B. The constant motion of electrons and the…
A. trypanosome B. paramecium C. chamydomonas D. amoeba Correct Answer: Option C - chamydomonas Explanation Protists are single-celled organisms that…
A. pectoral and pelvic girdles B. forelimbs, skull and pectoral girdle C. lungs and ribs D. skull and the vertebral…
A. organ B. system C. cell D. tissue Correct Answer: Option C - cell Explanation In unicellular organisms, the single…
A. they can be seen under microscope B. they range from 0.5 ยต m in diameter C. They are grouped…
A. Chloroplasts B. Ribosomes C. Cytoplasm D. Mitochondria Correct Answer: Option A - Chloroplasts Explanation Chloroplast is the combination of…