Why do we need trillions of cells? The human body is composed of trillions of cells. They provide structure for the body, take in nutrients from food, convert those nutrients into energy, and carry out specialized functions. Cells also contain the body’s hereditary material and can make copies of themselves. Why are cells small instead […]

Which of the following types of waves has the least amount of energy? Radio waves have the longest wavelengths and lowest frequencies of all electromagnetic waves. They also have the least amount of energy. On the right side of the diagram are X rays and gamma rays. Do Gamma rays have the least amount of […]

Where are action potentials received? Refractory Periods Graded Potentials Action Potentials At the dendrites and cell body At the axon Excitatory or inhibitory Always excitatory Smaller in size Larger voltage difference Triggered by input from the outside Triggered by membrane depolarization Does the contraction of papillary muscles open the Semilunar valves? Papillary muscles contract in […]

Which of the following are other natural hazards that can occur due to volcanic activity? Volcanic eruptions may be subtle or explosive and can produce dangerous lava flows, poisonous gases, and flying rocks and ash. Many volcanic eruptions are also accompanied by other natural hazards, such as earthquakes, landslides, debris flows, flash floods, fires and […]

What is another name for pickerel fish? Walleye are often called pickerel, especially in English speaking parts of Canada, while in the United States of America, they call the same species (Sander vitreus) a walleye. Is a pickerel and walleye? A walleye is sometimes called a pickerel, particularly in English-speaking parts of Canada, but in […]

Are club mosses seedless vascular plants? The club mosses, or Lycophyta, are the earliest group of seedless vascular plants. They dominated the landscape of the Carboniferous period, growing into tall trees and forming large swamp forests. What are seedless nonvascular plants? Plants that lack vascular tissue, which is formed of specialized cells for the transport […]

What will an egg with two X chromosomes fertilized by a sperm with an X chromosome result in? If the sperm carries an X chromosome, it will combine with the egg’s X chromosome to form a female zygote. If the sperm carries a Y chromosome, it will result in a male. During fertilization, gametes from […]

What is phenotype frequency? Relative phenotype frequency is the number of individuals in a population that have a specific observable trait or phenotype. Relative genotype frequency and relative allele frequency are the most important measures of genetic variation. How do you find allele frequency from phenotype frequency? Allele Frequency Allele frequency is most commonly calculated […]

Are leaves attached to stems at nodes? Leaves are attached to the plant stem at areas called nodes. An internode is the stem region between two nodes. The petiole is the stalk connecting the leaf to the stem. The leaves just above the nodes arose from axillary buds. Where does the leaf attached to the […]

What molecules are often made of oxygen hydrogen and carbon only? Carbohydrates. Carbohydrates are organic compounds that contain only carbon, hydrogen, and oxygen. They are the most common of the four major types of organic compounds. There are thousands of different carbohydrates, but they all consist of one or more smaller units called monosaccharides. What […]