Biology, 03.07.2019 01:00 jrfranckowiak

1. what is the result of a rock undergoing physical weathering? 2. how does chemical weathering change rock? provide examples. 3. what kinds of rocks weather most rapidly? 4. why is weathering slow in cold, dry places? ~!

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1.The answer is; soil. When rock weathers, it disintegrates into small and smaller particles. When these fine rocks particles combine with organic matter from living organisms, they make soil. The mineral component of the soil is therefore similar to that of the parent rock from which it came from.

2.Chemical weathering involves the reaction of the rock mineral with ‘chemicals’ or other compounds. These may include reaction with organic acids or acidic rainwater. Due to the chemical reaction, the rock chemical composition changes and the physical appearance may also look different.

3.The answer is limestone rocks. They are made of carbon-carbonate minerals. Carbon carbonate is easily dissolved by acids include slightly acidic rainwater/ precipitation.

CO2 + H2O → H2CO3 (carbon dioxide + water → carbonic acid)

H2CO3 + CaCO3 → Ca(HCO3)2 (carbonic acid + calcium carbonate → calcium bicarbonate)

4.Weathering of rocks is slower in cold regions than dry regions. This is because cold places do not encourage chemical weathering. Chemical weathering requires higher temperatures to increase the energies of the chemical atoms so that they react fast.

Answer from: Quest

answers are:

lysogenic viral dna merges with host cell dna

lysogenic no symptoms

lytic viral dna takes over

lysogenic virus does not destroy host cell

lytic virus destroys host cell

lytic induces symptoms of viral infection

lysogenic cell reproduces and spreads provirus

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the glands which are associated with each description is given below:

pancreas - is an endocrine and exocrine gland that secretes juices with enzymes for digestion. salivary glands- with protection and digestion in the mouth. liver- secretes bile for digestion. lachrymal glands - secrete tears to moisten eyes and protect them from particles and infection. sweat gland -regulates water, salt, and temperature. oil glands - to form a protective barrier on the skin. goblet cells - secrete mucus for protection.

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