21. Which of the following is a subdivision of Phylum Chordata?
[A] Urochordata
[B] Cephalochordata
[C] Vertebrata
[D] All of the above
Show Answer
Correct Answer: D [All of the above]
Notes:
Urochordata, Cephalochordata, and Vertebrata are subdivisions of Phylum Chordata. Chordata are bilaterally symmetrical, triploblastic with an organ-system level of classification.
22. Which of the following structures is absent in reptiles?
[A] Trachea
[B] Pharynx
[C] Larynx
[D] Vocal cords
Show Answer
Correct Answer: D [Vocal cords]
Notes:
Vocal cords structures are absent in reptiles. Reptiles, amphibians, and mammals all have a larynx.
23. A connecting link between reptiles and birds is __
[A] Dimetrodon
[B] Dodo
[C] Archaeopteryx
[D] Sphenodon
Show Answer
Correct Answer: C [Archaeopteryx]
Notes:
A connecting link between reptiles and birds is Archaeopteryx. Archeopteryx had a complete set of teeth, a rather flat sternum, a long, ponytail, australis, and three claws on the wing.
24. The living wingless or flightless birds belong to the superorder__
[A] Palaeognathae
[B] Odontognathae
[C] Archaeornithes
[D] None of these
Show Answer
Correct Answer: A [Palaeognathae]
Notes:
The living wingless or flightless birds belong to the superorder Palaeognathae. The group includes the ostriches, rheas, kiwis, emus, cassowaries, and tinamous.
25. Which of the following are examples of connective tissue?
[A] blood
[B] bone
[C] tendon
[D] All of the above
Show Answer
Correct Answer: D [All of the above]
Notes:
Blood, bone, tendon, adipose, ligament, and areolar tissues are examples of connective tissue.
26. What is the role of dendrites in neurons?
[A] send messages from all the senses to the brain
[B] receive many signals from other neurons
[C] carry messages from the brain to all the muscles
[D] carry both sensory and motor nerves
Show Answer
Correct Answer: B [receive many signals from other neurons ]
Notes:
Nerve cells or neuron have extensive processes and are called dendrites. These occupy a large surface area of a neuron. They receive many signals from other neurons and contain special proteins that receive, process and transfer these to the cell body.
27. What type of muscle is primarily found in your digestive tract?
[A] Rectus abdominus
[B] Cardiac Muscle
[C] Smooth Muscle
[D] Gastric Muscle
Show Answer
Correct Answer: C [Smooth Muscle]
Notes:
Smooth muscle, unlike skeletal muscle, is not under voluntary control and is found in walls of most organs and structures that contain muscle such as the esophagus, stomach, intestines, bronchi, uterus, urethra, and blood vessels. This muscle type’s responsibility is the contraction and relaxation necessary for the grinding and churning in the digestion process.
28. The main function is to transport oxygen to and from various tissues and organs:
[A] Leucocytes
[B] Erythrocytes
[C] Platelets
[D] Plasma
Show Answer
Correct Answer: A [Leucocytes]
Notes:
The main function of Leucocytes is to transport oxygen to and from various tissues and organs.
29. Which of the following cells of the immune system does not perform phagocytosis?
[A] Macrophage
[B] Neutrophil
[C] Eosinophil
[D] Basophil
Show Answer
Correct Answer: D [Basophil]
Notes:
Basophils are a type of white blood cell. They have the ability to help detect and destroy some early cancer cells.
30. Which of the following does not correct about diabetes?
[A] Diabetes insipidus is due to secretion of low levels of ADH.
[B] Diabetes mellitus is due to hyper-production of insulin.
[C] Without insulin, glucose remains in the bloodstream.
[D] All of the above
Show Answer
Correct Answer: B [Diabetes mellitus is due to hyper-production of insulin.]
Notes:
Diabetes is a disease that occurs when your blood glucose, also known as blood sugar, is too high.
