Why do Remora fish attach to sharks? A remora (Echeneis naucrates) and its host, a zebra shark (Stegostoma fasciatum). By attaching itself to the shark, the remora is carried along by the shark, allowing the remora to travel to different areas without having to expend its own energy to swim. The shark is completely unaffected […]

What does the photo part of photosynthesis refer to? Plants absorb sunlight and turn that energy into food; the process is known as photosynthesis. This is a compound word made up of photo (which means “light”) and synthesis (which means “to put together”). Where does the photo part of photosynthesis occur? the chloroplast What type […]

How are genes passed from generation to generation? DNA is passed down to the next generation in big chunks called chromosomes. Every generation, each parent passes half their chromosomes to their child. If nothing happened to the chromosomes between generations, then there would be around a 1 in 8 chance that you would get no […]

Why are biopharmaceuticals in high demand? Biopharmaceuticals are cheaper and easier to produce in mass quantities than pharmaceuticals derived from animals. … Which of the following best explains how trees help conserve energy and reduce pollution in cities? They remove ozone and particulates from the atmosphere. Which of the following best explains how trees help […]

What evidence do scientists use to support evolution? Five types of evidence for evolution are discussed in this section: ancient organism remains, fossil layers, similarities among organisms alive today, similarities in DNA, and similarities of embryos. What scientific evidence has been discovered since Darwin’s time that supports evolution by natural selection? A greatly expanded fossil […]

Do earthquakes happen before volcanoes erupt? Sometimes, yes. A few large regional earthquakes (greater than magnitude 6) are considered to be related to a subsequent eruption or to some type of unrest at a nearby volcano. However, volcanoes can only be triggered into eruption by nearby tectonic earthquakes if they are already poised to erupt. […]

What materials are needed for radiocarbon dating? For radiocarbon dating to be possible, the material must once have been part of a living organism. This means that things like stone, metal and pottery cannot usually be directly dated by this means unless there is some organic material embedded or left as a residue. Can radiocarbon […]

What is homozygous dominant homozygous recessive and heterozygous? An organism can be homozygous dominant, if it carries two copies of the same dominant allele, or homozygous recessive, if it carries two copies of the same recessive allele. Heterozygous means that an organism has two different alleles of a gene. What are the chances that two […]

How can matter recycle through the biosphere? Matter can cycle through the biosphere because biological systems do not use up matter, they transform it. The matter is assembled into living tissue or passed out of the body as waste products. What is recycled in the biosphere? Unlike energy, elements are not lost and replaced as […]

What other needs might a child have that a parent is expected to provide? Parents are obligated to provide financially for a child’s basic economic needs which include ensuring that children have access to nutritious food, shelter, clothing, and health care. What should a parent provide? A parent must serve a child’s emotional and physical […]