Blurd
Red blood cells transport:
A) Carbon dioxide
B) Nutrients
C) Oxygen
D) Hormones
C) Oxygen
Absorption in digestion is:
A) Breakdown of large molecules
B) Movement of nutrients into blood
C) Elimination of waste
D) Secretion of enzymes
B) Movement of nutrients into blood
. Compared to inspired air, expired air contains:
A) More oxygen and less water vapour
B) Less carbon dioxide and more oxygen
C) More carbon dioxide and more water vapour
D) Less water vapour and more oxygen
C) More carbon dioxide and more water vapour
The cell membrane:
A) Controls what enters and leaves the cell
B) Supports the cell structure
C) Stores food
D) Synthesizes proteins
A) Controls what enters and leaves the cell
. In a series circuit with one battery and three bulbs, how does the current at each bulb compare?
A. It increases at each bulb
B. It decreases at each bulb
C. It stays the same at each bulb
D. It stops after the first bulb
C. It stays the same at each bulb
What helps blood to clot?
A) Red blood cells
B) Platelets
C) Plasma
D) White blood cells
B) Platelets
Assimilation is the:
A) Use of nutrients by cells
B) Removal of waste
C) Movement of food
D) Digestion of proteins
A) Use of nutrients by cells
A secondary consumer feeds on:
A) Producers
B) Primary consumers
C) Decomposers
D) Plants
B) Primary consumers
23. A cell appears 200 μm in an image. The actual size is 20 μm. What is the magnification?
A) 10
B) 20
C) 200
D) 100
A) 10
carbon dioxide [CO2]:
A) bleaches damp litmus paper
B) turns limewater milky
C) turns damp red litmus paper blue
D) relights a glowing splint
B) turns limewater milky
The only veins in the body that carry oxygenated blood are the:
A) subclavian veins
B) pulmonary veins
C) coronary veins
D) vena cavas
B) pulmonary veins
Egestion is the:
A) Taking in of food
B) Breakdown of food
C) Removal of undigested food
D) Absorption of glucose
C) Removal of undigested food
. In the carbon cycle, carbon enters plants through:
A) Respiration
B) Feeding
C) Photosynthesis
D) Decomposition
C) Photosynthesis
The site of protein synthesis in bacteria is:
A) Cytoplasm
B) Ribosomes
C) Nucleus
D) Plasmid
B) Ribosomes
A student hears an echo 2 seconds after shouting near a wall. The wall is 340 meters away. What is the speed of sound?
A. 170 m/s
B. 340 m/s
C. 680 m/s
D. 1020 m/s
C. 680 m/s
The blood is pumped to the lungs from the heart through the:
A) aorta
B) pulmonary veins
C) pulmonary arteries
D) vena cavas
C) pulmonary arteries
Capillaries function to:
A) Pump blood
B) Allow exchange of substances
C) Store blood
D) Control heart rate
B) Allow exchange of substances
The noble gases are unreactive because:
A) They are metals
B) They are monatomic
C) They have full outer electron shells
D) They are radioactive
C) They have full outer electron shells
. Which structures are present in both bacteria and plant cells?
A) Chloroplasts and plasmids
B) Ribosomes and cytoplasm
C) Mitochondria and nucleus
D) Cell wall and chloroplasts
B) Ribosomes and cytoplasm
What does the wavelength of a wave measure?
A. The height of the wave
B. The number of waves per second
C. The distance between one crest and the next
D. The loudness of the wave
C. The distance between one crest and the next
Which statement is correct for most veins in the human body?
A) They carry blood at high pressure.
B) They have a pulse.
C) They have valves.
D) They take blood away from the heart.
C) They have valves.
The word equation for aerobic respiration is:
A) Glucose + carbon dioxide → oxygen + water
B) Glucose + oxygen → carbon dioxide + water
C) Oxygen + carbon dioxide → glucose + water
D) Glucose + water → oxygen + carbon dioxide
B) Glucose + oxygen → carbon dioxide + water
An element in Group V has how many outer-shell electrons?
A) 3
B) 5
C) 7
D) 8
B) 5
The ethanol emulsion test is used to detect:
A) Proteins
B) Sugars
C) Fats and oils
D) Starch
C) Fats and oils
If you connect three resistors in series with values 2 Ω, 4 Ω, and 6 Ω, what is the total resistance?
A. 6 Ω
B. 10 Ω
C. 12 Ω
D. 24 Ω
C. 12 Ω