The scientific method includes all of the following EXCEPT:
a hypothesis conclusions. an observation. a testable theory. experimentation.
Which of the following is/are characteristic of living organisms?
have membrane bound organelles ability to produce energy eat other organisms have a nucleus maintenance of homeostasis
maintenance of homeostasis
Adaptations include all of the following EXCEPT:
innate migratory behavior of young birds born in the Arctic. reduced heart rate and oxygen consumption in seals that dive deep for long periods of time. enlarged leg muscles in horses, in response to pulling heavy wagon loads. larger body size in male gorillas, which fight over females.
enlarged leg muscles in horses, in response to pulling heavy wagon loads.
Alexander Fleming observed a colony of mold that inhibited the growth of nearby bacteria. Which of the following was his hypothesis?
The bacteria changed their DNA when growing near the mold. The mold was dead. The mold produced a substance that killed nearby bacteria. The mold used all of the nutrients so that the bacteria couldn't grow.
The mold produced a substance that killed nearby bacteria.
A basic difference between a prokaryotic cell and a eukaryotic cell is that the prokaryotic cell:
lacks DNA. is considerably larger. possesses membrane-bound organelles. lacks a nucleus. is structurally more complex.
lacks a nucleus
In which kingdom does a multicellular, eukaryotic, photosynthetic organism belong?
Plantae Fungi Protists Animalia
The experiments of Francesco Redi:
disproved the idea of spontaneous generation. disproved that maggots and flies were related. determined that flies come from maggots. disproved the scientific method. used the scientific method to prove the idea of spontaneous generation.
disproved the idea of spontaneous generation.
A scientific theory:
is an educated guess. will never be changed. is less reliable than a hypothesis. is a general explanation for natural phenomena.
is a general explanation for natural phenomena.
A mutation is a:
change in the DNA sequence. physical deformity. dose of radiation. defective egg or sperm cell.
change in the DNA sequence.
Which is the correct sequence of increasing organization?
atom, molecule, tissue, cell organelle, tissue, cell, organ organ, tissue, cell, molecule molecule, cell, organelle, organ cell, tissue, organ, organ system
cell, tissue, organ, organ system
All of the following are scientific principles that underlie scientific inquiry EXCEPT:
uniformity in space and time. natural causality. common perception. natural selection.
A carefully formulated scientific explanation that is based on extensive observations and is in accord with scientific principles is called a:
fact. postulate. theory. hypothesis. control.
Why do heterotrophs require "food" for survival?
Food provides the organic chemicals needed by heterotrophs. Food is an alternative source of energy for heterotrophs when sunlight is unavailable. Food provides at least half of the water required by heterotrophs. Heterotrophs cannot photosynthesize without the chemicals provided by food.
Food provides the organic chemicals needed by heterotrophs.
The smallest units that still retain the characteristics of an element are called:
The innermost electron shell of an atom can hold up to _____ electrons.
Which of these relationships is true of an uncharged atom?
The atomic mass is equal to the atomic number. The number of electrons is equal to the number of neutrons. The number of protons is equal to the number of electrons. The atomic mass is equal to the number of electrons. The number of neutrons is equal to the number of protons.
The number of protons is equal to the number of electrons.
What determines the types of chemical reactions that an atom participates in?
the number of protons it contains the number of electrons in the outermost electron shell its atomic mass its atomic number the number of electrons in the innermost electron shell
the number of electrons in the outermost electron shell
What property of an atom determines which element it is?
the number of atoms the number of protons the number of neutrons the number of molecules the number of electrons
the number of electrons
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