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BIO ch1 class 10
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Answers
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1,,a,,,,,Enzymes are organic molecules synthesized by our cells to speed up reactions in our bodies. ... So out body uses enzymes as a 'catalyst' to speed up the decomposition of hydrogen peroxide. Enzymes are called 'biology' because there are a lot of inorganic catalysts, like iron, which also catalyse reactions.
b,,,,The only difference is that desert plants take up carbon dioxide at night and store it as an organic acid inside the body. In the day time to avoid excess transpiration due to scorching heat they keep their stomata closed and use the stored carbon dioxide by breaking down the organic acid...
ANSWER 2...The three events that occur during the process of photosynthesis are: (i) Absorption of light energy by chlorophyll. (ii) Conversion of light energy to chemical energy and splitting of water molecules into hydrogen and oxygen. (iii) Reduction of carbon dioxide to carbohydrates.
ANSWER 3..
A cross section of a leaf shows that it is a complex organ built of several different kinds of specialized tissues. The tissues, in turn, are built of specialized cells, and the cells, of organelles. Epidermis covers the upper and lower surfaces of the leaf..
ANSWER 4TH..
a,,,,plant is kept in dark for 72 hours before testing if green plants/ chlorophyll helps in formation of starch during photosynthesis. By keeping the plant in dark, the plant gets de- starched, all starch present in the leaves moves to other areas and leaves become free of starch.
b,,,,,
This procedure kills a leaf, disrupts the cell membranes and softens the cuticle and cell walls. This makes it possible to extract the chlorophyll with hot ethanol and also allows the iodine solution to penetrate the cells and react with any starch present.
c,,
The hot water kills the leaf and the alcohol breaks down the chlorophyll, taking the green color out of the leaf. When you put iodine on the leaves, one of them will turn blue-black and the other will be a reddish-brown. Iodine is an indicator that turns blue-black in the presence of starch..
d,,
The hot water kills the leaf and the alcohol breaks down the chlorophyll, taking the green color out of the leaf. When you put iodine on the leaves, one of them will turn blue-black and the other will be a reddish-brown. Iodine is an indicator that turns blue-black in the presence of starch..
SAME ANSWER...
ANSWER 5TH...
During extracellular digestion, food is broken down outside the cell either mechanically or with acid by special molecules called enzymes. Then the newly broken down nutrients can be absorbed by the cells nearby. Humans use extracellular digestion when they eat...
ANSWER 6TH..
Nutrition in an amoeba occurs through a process called phagocytosis where the entire organism pretty much engulfs the food it plans on eating up. The mode of nutrition in amoeba is known as holozoic nutrition. It involves the ingestion, digestion and egestion of food material...
ANSWER 7TH,,
Saliva contains the enzyme amylase, also called ptyalin, which is capable of breaking down starch into simpler sugars such as maltose and dextrin that can be further broken down in the small intestine. About 30% of starch digestion takes place in the mouth cavity...
ANSWER 8TH..
Their movements are random and you must do your best to survive for 60 ... a un refugio nuclear a toda prisa. Talic empunha espada e escudo e possui as .....
ANSWER 9TH..
The stomach secretes acid and enzymes that digest food. Ridges of muscle tissue called rugae line the stomach. The stomach muscles contract periodically, churning food to enhance digestion. The pyloric sphincter is a muscular valve that opens to allow food to pass from the stomach to the small intestine..
ANSWER 10,,
The gastric glands are located in different regions of the stomach. These are the fundic glands, the cardiac glands, and the pyloric glands. The glands and gastric pits are located in the stomach lining.
ANSWER 11,,
The chyme (food) enters into the duodenum portion of the small intestine and is acted on by the pancreatic juice, bile and finally by the enzymes in the succus entericus, so that the digestion of carbohydrates, proteins and fats is completed...
sorry brother i can't long answer because i use 5000 words,,,,
you can post remaining questions in next step...