A. from other organisms in exchange for some products. B. by the breakdown of complex substances C. by an organism…
A. parasitism B. symbiosis C. commensalism D. saprophytism E. predation Correct Answer: Option B - symbiosis
A. calcium B. phosphorus C. iron D. zinc E. copper Correct Answer: Option C - iron
A. Phosphorus B. Zinc C. Boron D. Silicon E. Molybdenum Correct Answer: Option A - Phosphorus
A. melanin B. chlorophyll C. xanthrophyll D. carotene E. chlorocruorin. Correct Answer: Option B - chlorophyll
A. petiole of leaves B. parenchyma of roots and shoots C. epidermis of roots and shoots D. apical regions of…
A. it is located in the brain B. its secretion are the more numerous than those of the other gland…
A. secreted into the blood through ducts B. secreted directly into the blood stream C. inactive chemical substance in the…
A. endocrine and nervous systems B. skeletal and nervous systems C. muscular and nervous systems D. circulatory and nervous systems…
A. haemoglobin B. haemocyanin C. chlorocruorin D. haemoerythrin E. melanin Correct Answer: Option E - melanin