How long did it take for the population to double once again? 1649 years How long did it take the world population to increase from 2 billion to 4 billion? It was another 123 years before it reached two billion in 1927, but it took only 33 years to reach three billion in 1960. Thereafter, […]

What happens when you use more energy than you take in? If we regularly eat more kilojoules than our body needs, the excess will be stored as body fat. Achieving or maintaining a healthy weight is all about balancing energy we take in and energy we burn. Why is energy important for the body? Energy […]

What are the classification systems in biology? There are seven major levels of classification: Kingdom, Phylum, Class, Order, Family, Genus, and Species. The two main kingdoms we think about are plants and animals. Scientists also list four other kingdoms including bacteria, archaebacteria, fungi, and protozoa. How do you classify animals using the classification system? In […]

What cell organelle would have a similar purpose to the roads throughout the town? The endoplasmic reticulum consists of a network of a tube-like passageway through which proteins from the ribosomes are able to be moved within a cell as the road system allows for movement throughout the city. Which organelle do you think would […]

How can a natural hazard cause genetic drift? Genetic drift can also be magnified by natural events, such as a natural disaster that kills a large portion of the population at random. The bottleneck effect occurs when only a few individuals survive and reduces variation in the gene pool of a population. How do natural […]

Why is asexual reproduction in plants called vegetative propagation? When a plant reproduces asexually through the means of its roots, stem and leaves, then this process is said to be Vegetative Propagation. The respective part of a plant will be useful to produce new plant species, apart from its seeds. What is asexual reproduction plant? […]

Where do you expect to find cells with many chloroplasts? In plants, chloroplasts occur in all green tissues, though they are concentrated particularly in the parenchyma cells of the leaf mesophyll. In which cell would you find chloroplast? plant cells Which cell has a large number of chloroplasts? Palisade cells Why is the location of […]

What does mitosis result in the formation of? During mitosis, a eukaryotic cell undergoes a carefully coordinated nuclear division that results in the formation of two genetically identical daughter cells. How does mitosis explain the process of growth? During mitosis one cell? divides once to form two identical cells. The major purpose of mitosis is […]

What is isotonic to an egg? In the case of the isotonic solution, there was roughly an equal amount of solutes in the corn syrup/water solution than there was in the egg, so there was no net movement in or out of the egg. It stayed the same size. So, water flowed into the egg, […]

What are the basic steps of genetic engineering? Genetic engineering is accomplished in three basic steps. These are (1) The isolation of DNA fragments from a donor organism; (2) The insertion of an isolated donor DNA fragment into a vector genome and (3) The growth of a recombinant vector in an appropriate host. What are […]