The chitin in the exoskeleton of many arthropods is strengthened by
- A. lids
- B. proteins
- C. calcium compounds
- D. organic salt
The main structure in vertebrates that supports and protects the body is the
- A. skeleton
- B. ligament
- C. muscle
- D. joint
Which of the following is a waste product of an insect?
- A. Alkaloids
- B. Uric acid
- C. Sweat
- D. Mucilage
Which of the following forms about 55% of the volume of the blood in man?
- A. leucocytes
- B. platelets
- C. plasma
- D. erythrocytes
The part of the mammalian skin involved in excretion is the
- A. sweat glands
- B. malpighian layer
- C. sebaceous gland
- D. horny layer
Which of the following helps in the clotting of blood?
- A. Red blood cells
- B. White blood cells
- C. Plasma
- D. Platelets
A plant tissue that carries water and mineral salts is the
- A. cambium
- B. xylem
- C. cortex
- D. phloem
The blood circulatory system of vertebrates consists of
- A. heart, arteries, capillaries and veins
- B. heart, aorta, capillaries and veins
- C. heart, aorta, arteries and veins
- D. heart, vena cava, arteries, and veins
Which blood cell are involved in the immune response of vertebrates?
- A. Phagoecytes
- B. lymphocytes
- C. erythrocytes
- D. monocytes
An example of a parasitic protozoan is
- A. Paramecium
- B. Plasmodium
- C. Eughlena
- D. Chlamydomonas
Fungi are referred to as hetotrophs because they
- A. are filamentous
- B. lack chlorophyll
- C. have mycelium
- D. lack roots
The process of transforming the chemical energy of cellular fuels into the high energy bonds of ATP in plants is
- A. autotrophism
- B. photosysnthesis
- C. photolysis
- D. respiration
Plants that have special devices for trapping and digesting insects are
- A. carnivorous
- B. symbiotic
- C. parasitic
- D. saprophytic
The enzyme that is present in the saliva is
- A. rennin
- B. lipase
- C. pepsin
- D. ptyalin
Movement of minerals and chemical compounds with a plant occurs during
- A. osmosis
- B. translocation
- C. transpiration
- D. diffusion
During the manufacture of food by plants, which of the following organism use energy from the sun?
- A. anabaena
- B. sulfur bacteria
- C. nitrosomonas sp
- D. nitrobacter sp
The long and sharp clawed feet of birds is an adaptation for
- A. crushing seeds
- B. scooping mud
- C. tearing flesh
- D. grasping prey
The structural adaptation of desert plants for water conservation is
- A. broad leaves with numerous stomata
- B. spongy mesophyll
- C. spiny leaves
- D. prominent stomata in leaves
Proboscis is a structure that is mostly found in
- A. insects
- B. tapeworms
- C. amphibians
- D. molluses
Which of the following is the simplest living organism?
- A. Paramecium
- B. Virus
- C. Amoeba
- D. Chlamydomonas
The plants that grow in deserts or very dry areas are referred to as
- A. mesophytes
- B. hydrophytes
- C. epiphytes
- D. xerophytes