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Biology


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Gen Bailey


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[Front]


Why is a stomata flaccid and why ?
[Back]


A stomata is closed when it is too windy or at night time to prevent water loss and because photsynthesis can not occur.

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24 questions
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Why is a stomata flaccid and why ?
A stomata is closed when it is too windy or at night time to prevent water loss and because photsynthesis can not occur.
What controls a stomata ?
Guard cells that allow C02 and 02 to diffuse via osmois.
What is a stomata ?
Tiny pores on a surface
How does blood flow through a heart to be oxygenated ?
Vena cava brings deoxygenated blood to the pulmonary artery that takes it to the lungs to be oxygenated, the blood travels back by the pulmonary vein to the heart to be pumped by the Aorta.
High and low blood pressure is in what
Artery=high bp small lumen veins = low bp wide lumen
Valves do what ? and septum does what ?
Prevent back flow and septum stops mixing
Ficks law equation is
Rate of diffusion = surface area x conc difference /thickness of membrane
Bottom line of ficks law eq means what
Inversely proportional so thickness of m is times by1/x then rate of d is x
Deamination
Excess proteins to fats , which makes ammonia which is toxix, made to urea to be excreted
What hormone helps osmoregulation
ADH is released by the pituarity gland to control water content (negative feedback )
Biomass is what and what is the eq
Biomass equals energy and the biomass gained/the total biomass
FOOD CHAIN =
Producer - primary consumer -secondary consumer - tertiary consumer
2 examples of sampling and why you use them
Random sampling = no of organisms in more than one location Belt transect= no of organisms along a transect line ( how light intensity could affect the pop)
Equation for sampling
Total area/area sampled x no of organsisms
Water is transported in a plant by
Transpiration in the xylem tube, that goes in one direction
Translocation occurs where
Phloem tube that goes up and down transporting food
If the body is too hot what happens
Vasoconstriction where the cappilaries contract to be closer the the skin so heat can be lost by radiation , creating sweat
Body is too cold
Shiver and constriction of capillaries to not allow heat to be evaporated by radiation (Vasodilatation )
Photosynthesis equation
Carbon + water ---> sunglight ----> glucose + oxygen
Limiting factors and what happens if a graph plateus
LF = light intensity and temperature and conc of co2 a graph platueus when something is no longer the limiting factor
How as aveoli adapted ?
One cell thick for faster diffusion
Resipiration eq
Glucose + OXYGEN = C02 + water
Anaerobic and aerobic
No oxygen to oxygen