Biology Essays

We performed these experiments to observe the effects of enzymes on the rate of reactions. We tested and compared the activity of the enzyme catalase on the substrate H2O2 in various states and percentages, and observed the absorption values of the enzyme-substrate relationship at different concentrations. Our results show that …

Over history technology has changed mankind’s overall culture. From clocks to computers the use of electronics and tools is occurring every day in almost all situations. In Carr’s article “Is Google Making us Stupid?” he introduces the idea how the internet is changing our lives by making us mentally process …

Herbal medicine is the use of herbs or plants for their therapeutic or medicinal value. This practice is becoming popular nowadays due to the use of natural ingredients rather than synthetic ones. Though only a few people believe in its effectiveness, many researches have been conducted so that other people …

Located at the base of the brain, the pituitary gland is protected by a bony structure called the sella turcica of the sphenoid bone. Median sagittal through the hypophysis of an adult monkey. Semidiagrammatic. Latin hypophysis, glandula pituitaria Gray’s subject #275 1275 Artery superior hypophyseal artery,infundibular artery,prechiasmal artery, inferior hypophyseal …

A permanent wave, commonly called a perm, involves the use of chemicals to break and reform the bonds of the hair. The hair is washed and wrapped on a perm rod and waving lotion is applied with a base. This solution creates a chemical reaction that softens the inner structure …

Europeans had been digging up strange-looking bones along lakebeds and riverbanks for hundreds of years before the 18th century (Strauss). Many of the finds confused the Europeans since they could not wrap their heads around where the bones were coming from. The intact skeleton of the marine reptile, Mosasaurus, was …

Stromatolites are rock-like structures of multi-layered sheets of microorganisms (microbial mats) that form in limestone. Stromatolites generally form from the trapping and binding of particles by microorganisms e.g. algae and bacteria, and grow upward to get light from photosynthesis. Stromatolites provide scientists with some of the oldest records of early …

1.Nucleus – The nucleus generally contains the genetic material for the cell. Because it contains the DNA and chromosomes, which affect the proteins that determine the activities of the cell, the nucleus can be considered to be the cell’s control centre. 2.Cytoplasm – The cytoplasm contains primarily water and protein …

White blood cell (WBC)—A white blood cell is one of the three main types of blood cells. They are produced in the bone marrow and released into the blood. White blood cells are responsible for fighting infection. There are several kinds of white blood cells, including monocytes, lymphocytes, neutrophils, eosinophils, …

Located within the vacuole of beetroot cells is a red pigment call Betalains. Typically these pigments are contained within the cell vacuole by the tonoplast (vacuole membrane), however When beetroot is heated these red pigments escape the vacuole. This experiment aims to explore the effect of temperature on the permeability …