43
Which of the following is used mainly for balancing in fish?
- A. the caudal fin
- B. the pectoral fin
- C. the anal fin
- D. the dorsal fin
44
Radial symmetry is a feature common to
- A. platyhelminthes
- B. nematodes
- C. coelenterates
- D. arthropods
45
The most abundant group of organisms in the animal kingdom is
- A. mammalia
- B. aves
- C. annelida
- D. insecta
46
The bacteria type that are arranged in chains are the
- A. staphylococci
- B. clostridia
- C. streptococci
- D. bacilli
47
In plants, the structure that performs a similar function with the testis in mammals is the
- A. stigma
- B. filament
- C. anther
- D. receptance
48
The cell of an onion bulb can be differentiated from a cheek cell by the presence of
- A. plasmalemma
- B. chloroplast
- C. cell wall
- D. nucleus
49
A characteristic that can possibly be shared by both living and non living organisms is
- A. locomotion
- B. irritability
- C. increase in biomass
- D. increase in size
50
In terms of the number of individuals, which of the following taxa is most inclusive?
- A. order
- B. family
- C. class
- D. species