What does natural selection mean to a mutation? As mutations occur, natural selection decides which mutations will live on and which ones will die out. If the mutation is beneficial, the mutated organism survives to reproduce, and the mutation gets passed on to its offspring. What best summarizes the concept of natural selection? Answer. The […]

Which of the following is a long-term consequence of mining on the Earth a erosion? All of the mentioned options: erosion, an open pit, and sedimentation are long-term consequences of mining on the Earth. What are the long-term effects of mining? On a long-term basis, mining can increase the acidity of water in streams; cause […]

Which term is used to describe all the species that live in the Arctic National Wildlife Refuge? The community is the term, which is used to illustrate all the species that thrive in the Arctic National Wildlife Refuge. The community also is known as the biological community, refers to an associating group of different species […]

What arteries supply the heart muscle with blood? Coronary arteries supply blood to the heart muscle. Like all other tissues in the body, the heart muscle needs oxygen-rich blood to function. Also, oxygen-depleted blood must be carried away. The coronary arteries wrap around the outside of the heart. What are diseases of the heart and […]

What physical factors affect enzyme activity? Enzyme activity can be affected by a variety of factors, such as temperature, pH, and concentration. Enzymes work best within specific temperature and pH ranges, and sub-optimal conditions can cause an enzyme to lose its ability to bind to a substrate. What are some factors that can affect enzyme […]

How can a problem in one body system affect other body system? Your circulatory system delivers oxygen-rich blood to your bones. Meanwhile, your bones are busy making new blood cells. Working together, these systems maintain internal stability and balance, otherwise known as homeostasis. Disease in one body system can disrupt homeostasis and cause trouble in […]

What is the point that holds the chromosome together called? The two chromatids of a duplicated chromosome are held together at a region of DNA called the centromere (see figure below). Centromeres are the attachment points for microtubules, which are responsible for the guiding the movement of chromosomes during mitosis and meiosis. What is the […]

How is genetic material passed from parent to offspring? One copy is inherited from their mother (via the egg) and the other from their father (via the sperm). A sperm and an egg each contain one set of 23 chromosomes. When the sperm fertilises the egg, two copies of each chromosome are present (and therefore […]

What are the two types of coevolution? A few different categories of coevolution are often discussed by scientists in ecology and evolutionary biology: pairwise coevolution, diffuse coevolution, and gene-for-gene coevolution. Pairwise coevolution (or ‘specific’ coevolution) describes tight coevolutionary relationships between two species. What is it called when two species evolve together? In biology, coevolution occurs […]

What reactions gain electrons? Oxidation is the process of losing an electrons, while reduction is the process of gaining them. Any chemical that causes another chemical to lose electrons (become oxidized) is called an oxidizing agent. Conversely, any chemical that causes another chemical to gain electrons is called a reducing agent. What type of metabolic […]