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two atoms always represent the same element if they have a the same number of particles in the nucleus b the same number of electrons c the same
which statement is true of the energy levels of electrons in shells a all the electrons in an atom have similar amounts of energy b electrons must
can you please describe the differences between continuous traits and discrete traits and how it helps an ecologist measure variation please give a
while waiting at an airport nail campbell once overheard this claim its paranoid and ignorant to worry about industry or agriculture contaminating
agriculture industry and growing populations of cities all compete through political influence for water if you were in charge of water resources in
design a controlled experiment to test the hypothesis that acid precipitate inhibits the growth of elodea a common freshwater
consider the evolution of metabolic pathways some biologists believe that these pathways evolved
in agriculture areas farmer pay close attention to d weather forecast right before a predicted overnight freeze farmers spray water on crops to
in lab rats hair color and texture are controlled by two genes the a gene for color and the b gene for texture in both of these genes the alleles
by bombarding atoms in a thin metal sheet with energetic particles rutherford found that most of the mass of an atom is concentrated inside a very
the atomic number of the isotope 238u of uranium is 92 the nucleus of this isotope contains a 184 protons 92 electrons and 54 neutrons b 92 protons
assume that you have 1m stock solutions of nacl kcl and cacl2 if the ion concentrations in human plasma are 120 mm na 12mm k and 2 mm ca compute the
what do enzymes do and how how is enzyme activity regulated in cells how do atpases use atp to make reactions
in what ways has biotechnology changed agriculture in the united states select all that apply the development of herbicide-resistant crops the
how many different proteins each composed of 8 amino acids can be constructed using the 20 different amino acids found in
a population has 350 births per 1000 individuals and 320 deaths per 1000 individuals 1 what its population growth rate 2 intrinsic rate of increase 3
a snapdragon plant that bred true for white petals was crossed to a plant that bred for purple petals and all the f1 had white petals the f1 was
in rats the gene pigment p is dominant to no pigment p the gene for black b is dominant to the gene for cream b if a pigment gene p is absent genes b
humans have selectively bred many radically different domestic animalseg st bernard and chihuahua dog breeds does this activity result in evolution
why is the development of bipedalism considered to be a major advancement in human
the human body can exhibit a wide range of resistances to current depending on the path of the current contact area and sweatiness of the skin
a wire 500 m long and 200 mm in diameter is connected to a source with a potential difference of 911 v and the current is found to be 337 a assume a
compare the teeth of australopithecus afaensis and homo sapiens adescribe the similarities and differences between the two species b write a
what would be the approximate number of amino acids of a protein with a mass of 203 kd assume an average molecular weight for amino acids of 110
which of the following does not support evolution biogeography the fossil record comparative anatomy radiometric dating all of these choices are