31. The appendicular skeleton includes
- A. pectoral and pelvic girdles
- B. forelimbs, skull and pectoral girdle
- C. lungs and ribs
- D. skull and the vertebral column
Correct Option: Answer is A
The appendicular skeleton is the portion of the skeleton of vertebrates consisting of the bones that support the appendages.
32. The protista that is a producer is an aquatic food chain is
- A. trypanosome
- B. paramecium
- C. chamydomonas
- D. amoeba
Correct Option: Answer is C
Protists are single celled organisms that contain chloroplasts to aid photosynthesis.
Algae → Protozoa → Small Insects → Large aquatic Insects → Small fish → Large fish
33. Which scenario would cause a covalent bond to form?
- A. Two atoms share electrons so they can fill their outer shells
- B. The constant motion of electrons and the creation of charge imbalances bonds two molecules together
- C. A hydrogen atom with a slight positive charge is attracted to a negative charge of another molecule or atom
- D. One atom loses one or more electrons and the other atom gains one or more electrons
Correct Option: Answer is A
34. The difference in structure, morphological and behavior of plant and animal is called
- A. adaptation
- B. evolution
- C. variation
- D. succession
Correct Option: Answer is C
Variation, in biology, any difference between cells, individual organisms, or groups of organisms of any species caused either by genetic differences (genotypic variation) or by the effect of environmental factors on the expression of the genetic potentials
35.
Use the diagram to answer the question that follows
The structure is adapted for
- A. omnivores
- B. herbivores
- C. canivores
- D. omnivores and canivore
Correct Option: Answer is A
36. The product after the union of the male and female gamete in animals is called
- A. sperm
- B. egg
- C. embryo
- D. zygote
Correct Option: Answer is D
zygote is the union of the sperm cell and the egg cell. Also known as a fertilized ovum, the zygote begins as a single cell but divides rapidly in the days following fertilization. After this two-week period of cell division, the zygote eventually becomes an embryo
37. The possession of scales, laying of eggs with shells and bony structure of the head are characteristics shared by
- A. birds and reptiles
- B. fishes and birds
- C. reptiles and fishes
- D. birds and molluscs
Correct Option: Answer is A
Birds share many characteristics with reptiles such as being vertebrates, having scales on parts of their bodies, and laying amniotic eggs with shells. B. Birds have unique characteristics such as laying eggs with hard shells, and having feathers, wings, and a beak.
38. The lungs of the lung fish is an adaptation for respiration _______?
- A. to complement gills while in water
- B. to complement gills while on land
- C. while on land
- D. while in water
Correct Option: Answer is D
39. Which of the following is an example of active transport?
- A. Oxygen exchanging between red blood cells and liver cells
- B. Carbon dioxide exchanging between muscle cells and red blood cells
- C. Water moving out of the small intestine
- D. Sodium being reabsorbed in the kidney
Correct Option: Answer is D
Although sodium ions are small, their charge prevents them from moving across the cell membrane through simple diffusion. They must be transported using active transport.
40. The key event in the transition of the amphibians from water to land is the ________
- A. replacement of the gills with lungs
- B. possession of webbed limbs
- C. limbs
- D. possession of tympanic membrane