Welcome to your AQA A2 Biology 3 Select the incorrect statement regarding rods. Retina contains about 120 million rods. Rods contain iodopsin. Rods are cylindrical elongated cells. Rods are highly sensitive for low light intensities.Which type of cells secrete glucagon? Magakaryocyte Adipose cells Alpha cells Beta cellsSelect the correct statement out of the following. The rhizophere is a center of low biological activity. The rhizosphere environment generally has a higher pH. Rhizosphere micro organisms encourage plant growth. Rhizophere soil is significantly dry.What is mycorrhiza? A parasitic association between a fungus and the roots of a plant. A symbiotic association between a fungus and the leaves of a plant. A symbiotic association between a fungus and the roots of a plant. A symbiotic association between 2 plants.The chemical energy store in plant biomass within a given area or volume. Net Primary Production (NPP) Plant Primary Production Gross Primary Production (GPP) Gross ProductionWhat does the external layer of the eyeball consist of? Iris and cornea Sclera and cornea Lens and pupil Sclera and lensWhich part of the nephron secretes renin? Afferent arteriole Loop of Henley Bowman's capsule Juxtaglomerular apparatusSelect the correct sequence of the nitrogen cycle. Nitrogen fixation, assimilation, nitrification, ammonification, dentrification Nitrification, assimilation, nitrogen fixation, ammonification, dentrification Dentrification, ammonification, assimilation, nitrification, nitrogen fixation Nitrogen fixation, nitrification, assimilation, ammonification, dentrificationWhat happens if the internal temperature is low in an organism? Water may enter the cells and cause swelling. It causes a disturbance in the nervous system. Metabolic reactions slow down. Metabolic reactions increases.Which is not a feature of tissue fluid that influences cell activities? Metabolic wastes Concentration of glucose Water potential TemperatureThe microecological zone in direct proximity of plant roots. Photosphere Microsphere Ozonosphere RhizosphereOrganisms responsible for the nitrification process of nitrogen cycle. Aerobic chaemoautotrophic bacteria Anaerobic phototrophic bacteria Anaerobic chaemoautotrophic bacteria Photoautotrophic bacteriaThe 'blind spot' in an eye. Retina Sclera Cornea FoveaSelect the incorrect pair of receptor and stimulus. Pressure receptor-light Thermoreceptor-temperature Electroreceptor-electrical potential differences Chemoreceptor-chemicalsWhich statement is incorrect regarding the use of artificial fertilizers? It helps in regulating the nitrogen cycle. The amount of nitrates in the soil increases. It reduces the natural nitrification process. It increases the activity of dentrification bacteria.Organisms responsible for the dentrification process of nitrogen cycle. Anaerobic photoautotrophic bacteria Anaerobic chaemoautotrophic bacteria Photoautotrophic bacteria Aerobic chaemoautotrophic bacteriaWhich of the following is incorrect regarding the role of renin? It facilitates vasodilation and decreases blood pressure. It stimulates the adrenal cortex to secrete aldesterone. It facilitates the maintenance of the blood volume. It participates in the body's renin–angiotensin system.Organisms responsible for ammonification during nitrogen cycle. Parasitic bacteria and fungi Fungi only Symbiotic bacteria and parasitic bacteria Saprophytic bacteria and fungiThe pigment present in cones. Iodopsin Melanin Tripsin RhodopsinCells responsible for colour vision. Cochlear cells Cone cells Corneal cells Choroid cellsTime is Up!