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level: Level 2 - Extending

Questions and Answers List

level questions: Level 2 - Extending

Question	Answer
How does Carbon Dioxide enter the leaf? a) Stomata b) Roots c) Xylem	a) Stomata
What is also lost when the stomata are open (other than the gases that need exchanging)? a) Light b) Water vapour c) Nitrogen	b) Water vapour
Which cells are responsible for controlling the water content of the leaf? a) Guard cells b) Root hair cells c) Palisade cells	a) Guard Cells
If the plant does NOT have much water, will the guard cells be open or closed?	Closed
If the plant cell has lots of water, will the guard cells be open or closed?	Open
When guard cells TAKE UP water by osmosis, they become ... a) Turgid and Closed b) Flaccid and Closed c) Turgid and Open	c) Turgid and Open
When guard cells LOSE water by osmosis, they become ... a) Turgid and Closed b) Flaccid and Closed c) Turgid and Open	b) Flaccid and Closed
When are Guard Cells most likely to be fully open for optimal gas exchange to happen? a) Night b) Day c) Evening	b) Day
List 3 adaptations to the structure of a normal leaf to increase the rate of diffusion of gases in the leaf.	1. Many Stomata 2. Very thin leaf (short diffusion distance) 3. Air spaces in spongy mesophyll
What are the two reactants in photosynthesis?	Carbon Dioxide + Water
Which pigment absorbs light in photosynthesis?	Chlorophyll
What is the balanced symbol equation for photosynthesis?	6CO2 + 6H2O ----> C6H12O6 +6O2
How is the leaf adapted for maximum rate of photosynthesis?	Large SA, Transparent upper epidermis, palisade cells with lots of chloroplasts.
Name the chemical test for starch. a) Iodine b) Benedicts c) Buirets	a) Iodine
What is hydrogencarbonate indicator used for? a) Indicator of glucose concentration b) Indicator of hydrogen concentration c) Indicator of carbon dioxide concentration	c) Indicator of Carbon Dioxide concentration
Which part of the brain is involved with thermoregulation? a) Pituitary Gland b) Hypothalamus c) Cerebrum	b) Hypothalamus
What does the hormone ADH do? a) increases water reabsorption in the kidney b) F: Stimulates egg release(ovulation), M: Testosterone production c) F: Stimulates egg development, M: Stimulates sperm production	a) increases water reabsorption in the kidney
What does the hormone LH do? a) increases water reabsorption in the kidney b) F: Stimulates egg release(ovulation), M: Testosterone production c) F: Stimulates egg development, M: Stimulates sperm production	b) F: Stimulates egg release(ovulation), M: Testosterone production
What does the hormone FSH do? a) increases water reabsorption in the kidney b) F: Stimulates egg release(ovulation), M: Testosterone production c) F: Stimulates egg development, M: Stimulates sperm production	c) F: Stimulates egg development, M: Stimulates sperm production
What does the hormone Thyroxin do? a) Controls metabolic rate b) Lowers blood glucose c) Increases blood glucose	a) Controls metabolic rate
What does the hormone Insulin do? a) Controls metabolic rate b) Lowers blood glucose c) Increases blood glucose	b) Lowers blood glucose
What does the hormone Glucagon do? a) Controls metabolic rate b) Lowers blood glucose c) Increases blood glucose	c) Increases blood glucose
What does the hormone Adrenalin do? a) Fight or Flight response b) Female sex characteristics c) Regulates menstrual cycle	a) Fight or Flight response
What does the hormone Oestrogen do? a) Fight or Flight response b) Female sex characteristics c) Regulates menstrual cycle	b) Female sex characteristics
What does the hormone Progesterone do? a) Fight or Flight response b) Female sex characteristics c) Regulates menstrual cycle	c) Regulates menstrual cycle