Biology Quiz 3

Men usually have a higher Red blood cell (RBC) count than women, and the level of red blood cells tends to decrease with age. The normal RBC count in an adult male is 4.7–6.1 million, an adult female is 4.2–5.4 million and newborns is 4.8–7.2 million.

Protein is most important for the growth of children up to the age of 14. It helps repair and maintain vital tissues and, is crucial for the growth of all organ systems including bones and muscles. Proteins in the body also work as enzymes, immune molecules, hormones and cellular messengers. Therefore, proteins are vital for the growth and development of every child.

Xenobiotics which are inherently resistant to microbial attack are called as Recalcitrant.

The 'eye' of the potato can produce new plants by vegetative propagation.

It is the nerve tissue where no cell division occurs after birth. Cell division is the process by which a parent cell divides into two daughter cells with the same genetic material. There are two types of cell division: mitosis and meiosis. There is absence of centrioles in the nerve cells and because of this they are unable to perform mitosis and meiosis and hence these cells do not divide.

Non-conventional energy (also known as Renewable energy) sources are sources that are renewed by natural processes on a continual basis. Energy generated by using wind, solar, small hydro, tides, geothermal heat and biomass is known as non-conventional energy. Hydroelectric power is a renewable energy source. It uses the energy of running water, without reducing its quantity, to produce electricity.

Normally, each cell in the human body has 23 pairs (46) of chromosomes (Half come from the mother and the other half come from the father). Twenty-two of these pairs, called autosomes, look the same in both males and females. The 23rd pair, the sex chromosomes, differ between males and females. Females have two copies of the X chromosome, while males have one X and one Y chromosome.

Monocot and dicot plants have different pollen structures. In a monocot, the pollen grain produced by the flower has a single furrow or pore through the outer layer. In a dicot plant, the pollen grain has three furrows or pores.

Normal fasting blood glucose levels range from 70 to 99 mg/dL (3.9 to 5.5 mmol/L). Higher ranges could indicate pre-diabetes or diabetes.

The femur (thigh bone) is the longest, largest and strongest bone in the human body. It is almost 19.9 inches long. Tibia (lower leg bone) is the second-longest (16.9 inches) bone in the human body.