Natural selection is the process where the weak become decease and the strong live on to repopulate and produce more of the strong kind
Answer: Cell wall; plant cells have a cellulosic cell wall, which is absent in the case of animal cells. The plasma membrane serves as the outermost boundary for an animal cell. Chloroplast: The presence of chloroplast enables photosynthesis in plant cells and it is absent in animal cells.
Explanation:
Answer:
Earthquakes are usually caused when rock underground suddenly breaks along a fault. This sudden release of energy causes the seismic waves that make the ground shake. When two blocks of rock or two plates are rubbing against each other, they stick a little. ... When the rocks break, the earthquake occurs.
Explanation:
Answer:
This question lacks options, the options are:
A) 100 ml Beaker
B) 250 ml Erlenmeyer Flask
C) 250 ml Graduated Cylinder
The answer is B). 250 ml Erlenmeyer Flask
Explanation:
Several types of glasswares are used in chemical laboratories for performing processes like mixing, heating and stirring of chemicals. In this question, Dr. Malani Mackey who works for a pharmaceutical company is trying to develop a cancer drug by making a mixture of L-histidine, polysorbate 80, and sucrose. This mixture is required to be heated and stirred (shaked) during the mixing. Hence, a glassware adapted for this purpose must be used.
- Erlenmeyer Flask, also known as Conical flask is a laboratory flask named after its conical base/bottom. This glassware is used to mix and even heat chemicals in the laboratory. Due to its cone-shaped body coupled with a long cylindrical neck, the contents in the Erlenmeyer Flask can be shaked or stirred without spilling them. This property gives the ERLENMEYER flask an edge over the BEAKER (has a large open mouth) when used for stirring purposes.
The Graduated cylinder is best suited for making precise measurements of liquid chemicals, hence, it is not an appropriate glassware for heating and stirring.
Answer:
Rice, wheat, and maize are commonly cultivated in cereal. Cereals are known to be rich in minerals, vitamins, fats and proteins, carbohydrates, which provides more energy. Cereals play an important and largest contribution to human nutrition. The major cereals in the world are rice, wheat and maize.
Rice is the most important food crop of the developing world and the staple food of more than half of the world's population. Rich in nutrients and vitamins and minerals, it an excellent source of complex carbohydrates. Nine out of every ten people in the world who eat rice are Asian.
Wheat is the most important source of carbohydrate in a majority of countries. Wheat starch is easily digested, as is most wheat protein. Wheat contains minerals, vitamins and fats (lipids), and with a small amount of animal or legume protein added is highly nutritious.
Maize is also used in making ethanol and other biofuels. Maize is widely cultivated throughout the world, and a greater weight of maize is produced each year than any other grain. In 2014, total world production was 1.04 billion tonnes.
Barley belongs to the group of self-pollinating plants. Barley contains 8 essential amino acids, vitamins of the B group and minerals such as magnesium, phosphorus, iron and zinc. The greatest quantity of produced barley (usually more than 50% of globally produced barley) is used as animal food.
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