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Biology
Which method of heat exchange occurs during direct contact between the source and animal? radiation evaporation convection conduction
The wall dividing individual cells in a fungal filament is called a thallus hypha mycelium septum
What type of ecosystems are particularly threatened by exotic species? Deserts, marine ecosystems, islands, and tropical forests.
Scientists have been monitoring a population of Adelie penguins on Anvers island in Antarctica. The scientists recently noticed that there has been a large amount of emigration onto neighboring islands. However, the waters around these nearby islands do not supply as much food and are thus not optimal habitats for the penguins. Which of the following is the best explanation for the emigration behavior of the penguins? A. Killer whales (a common predator of Adelie penguins) have appeared in waters around Anvers Island. B. Killer whales (a common predator of Adelie penguins) have appeared in waters around the neighboring islands. C. A decline in the penguin population size has caused them to emigrate. None of these choices are plausible explanations. D. The penguins move to neighboring islands every few years.
Three transition elements in Group 12 of the periodic table are? A. Iron, nickel, and cobalt B. mercury, zinc, and cadmium C. copper, silver, and gold D. neon, helium, and xenon
DNA replication occurs at the same time in both strands of DNA. Why aren't both strands extended continuously (i.e. why is there a leading and lagging strand)?
10 characteristics of all living things
The fimbriae are the: A. fringe-like ends of the uterine tubes. B. tissue folds in the vagina. C. ligaments that hold the ovaries in place. D. sacs in the ovary that hold the eggs.
PLEASE HELP ! 1. Two atoms are the same element if they have the same _________. A. Atomic number B. Number of neutrons C. Charge D. Number of Electron shells 2. Which statement about compounds is TRUE? A. Compounds are chemical substances B. Compounds form between two or more elements C. both A and B D. None of the above 3. Which of the following is correct regarding the chemical bond between hydrogen and oxygen atoms in a water molecule? A. results in an unusually strong bond B. results in a nonpolar molecule of water C. forms by a shared pair of electrons between hydrogen and oxygen D. forms between the neutral poles of hydrogen and oxygen 4. Magnesium (a metal) and oxygen (a nonmetal) combine to form magnesium oxide (MgO). The atoms are held together by strong electrostatic attractions between the positive and negative charges of the atoms. Which type of bond holds these atoms together? A. Polar covalent B. Ionic C. Hydrogen D. Covalent
Phenotypes that have a range of variability (not discrete differences such as Mendel's pea flower color), are typically a result of ______. a. polygenic inheritance b. independent assortment c. gene linkage d. segregation
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