Biology and Genetics
101624 questions • Page 1709 / 2033
When a rock is broken into smaller pieces, its ____. surface area decreases and
When a rock is broken into smaller pieces, its ____. surface area decreases and volume increases surface area increases but its volume remains the same surface area and volume inc…
When a rock is exposed at the surface of the Earth chemical and mechanical weath
When a rock is exposed at the surface of the Earth chemical and mechanical weathering processes may act upon it. a) Explain why the rates of the chemical weathering processes that…
When a rock is exposed at the surface of the Earth chemical and mechanical weath
When a rock is exposed at the surface of the Earth chemical and mechanical weathering processes may act upon it. a) Explain why the rates of the chemical weathering processes that…
When a single polypeptide denatures it: A) loses its primary structure. B) loses
When a single polypeptide denatures it: A) loses its primary structure. B) loses its quaternary structure C) loses its secondary and tertiary structure D) hydrolyzes into amino ac…
When a small number of individuals moved to the United States from Germany, they
When a small number of individuals moved to the United States from Germany, they established an Amish population. Why do you often see a higher prevalence of some rare diseases in…
When a solution of cesium chloride (CsCl) is subjected to high-speed centrifugat
When a solution of cesium chloride (CsCl) is subjected to high-speed centrifugation, a stable density gradient is formed. Meselson and Stahl found that when cell contents were sub…
When a species occupirs a wide area, its phenotyprs usually vary actoss its geog
When a species occupirs a wide area, its phenotyprs usually vary actoss its geographic range. This variation results from different evolutionary processes in different environment…
When a subject is not telling the truth, the GSR, heart rate, and BPM should all
When a subject is not telling the truth, the GSR, heart rate, and BPM should all ____(increase/decrease). A division of the ANS responsible for these corresponding changes in GSR.…
When a telescope takes an image of an astronomical object, a shutter above the d
When a telescope takes an image of an astronomical object, a shutter above the detector is opened to allow light to enter at the start of an exposure, and it is left open for a sp…
When a trait results from a dominant/recessive pair of alleles, what kind of inh
When a trait results from a dominant/recessive pair of alleles, what kind of inheritance does it refer to? . In a scientific article, in which section would you explain what the g…
When a tree is tapped for maple syrup, what region is tappedand why? A. The xyle
When a tree is tapped for maple syrup, what region is tappedand why? A. The xylem is tapped because it is transporting food fromthe roots to the upper regions of the tree. B. The …
When a tropical moth of the genus Automeris is touched on the thorax it lifts it
When a tropical moth of the genus Automeris is touched on the thorax it lifts its forewings up abruptly, exposing its brightly coloured hindwings. What causes the moth to behave t…
When a true-breeding black fish and a true-breeding yellow fish mate, all of the
When a true-breeding black fish and a true-breeding yellow fish mate, all of their (F, ) offspring are yellow. If two of the F_1 offspring mate with each other, what phenotypic an…
When a very cold continental polar air mass moves over the Great Plains the air
When a very cold continental polar air mass moves over the Great Plains the air mass can be expected to modify by: A. Cooling down and drying significantly B. Warming up and dryin…
When a water beetle is placed in a laboratory situation where the atmosphere is
When a water beetle is placed in a laboratory situation where the atmosphere is pure O2 and the water that the beetle is in is equilibrated with the atmosphere, after the beetle o…
When a woman\'s \"water breaks\" you are seeing the release of amnion. True fals
When a woman's "water breaks" you are seeing the release of amnion. True false Which hormone is not secreted by the placenta? LH HCG HPL Relaxin Progesterone and estrogens The pro…
When a women is giving birth, the head of the baby pushes against her cervix and
When a women is giving birth, the head of the baby pushes against her cervix and stimulates release of the hormone oxytocin. Oxytocin travels in the blood and stimulates the uteru…
When acetylcholine diffuses across the synaptic cleft and binds to receptors o t
When acetylcholine diffuses across the synaptic cleft and binds to receptors o the folded sarcolemma it initially causes channels to open in the sarcolemma. voltage-gated Ca++ che…
When acetylcholine is released into the neuromuscular junction, a) action potent
When acetylcholine is released into the neuromuscular junction, a) action potentials are triggered, which lead to activation of the contraction cycle. b) the muscle membrane depol…
When activated by the extracellular signal protein platelet-derived growth facto
When activated by the extracellular signal protein platelet-derived growth factor (PDGF), the PDGF receptor phosphorylates itself on multiple tyrosines (as indicated in Figure 16-…
When activated by the extracellular signal protein platelet-derived growth facto
When activated by the extracellular signal protein platelet-derived growth factor (PDGF), the PDGF receptor phosphorylates itself on multiple tyrosines (as indicated in Figure 1…
When activated by the extracellular signal protein platelet-derived growth facto
When activated by the extracellular signal protein platelet-derived growth factor (PDGF), the PDGF receptor phosphorylates itself on multiple tyrosines (as indicated in Figure 1…
When activated by the extracellular signal protein platelet-derived growth facto
When activated by the extracellular signal protein platelet-derived growth factor (PDGF), the PDGF receptor phosphorylates itself on multiple tyrosines (as indicated in Figure A) …
When adding your DNA samples to the agarose gel, you will need to add loading dy
When adding your DNA samples to the agarose gel, you will need to add loading dye to the samples. Loading dye contains: glycerol, which helps the samples sink into the sample well…
When adding your DNA samples to the agarose gel, you will need to add loading dy
When adding your DNA samples to the agarose gel, you will need to add loading dye to the samples. Loading dye contains: glycerol, which helps the samples sink into the sample well…
When adding your DNA samples to the agarose gel, you will need to add loading dy
When adding your DNA samples to the agarose gel, you will need to add loading dye to the samples. Loading dye contains: glycerol, which helps the samples sink into the sample well…
When adding your DNA samples to the agarose gel, you will need to add loading dy
When adding your DNA samples to the agarose gel, you will need to add loading dye to the samples. Loading dye contains: ¥ glycerol, which helps the samples sink into the sample we…
When administered orally, the predator drug Rohypnol (flunitrazepam) has a bioav
When administered orally, the predator drug Rohypnol (flunitrazepam) has a bioavailability F of 70%. A woman arrives unconscious in the emergency room with signs that a sexual ass…
When administered orally, the predator drug Rohypnol (flunitrazepam) has a bioav
When administered orally, the predator drug Rohypnol (flunitrazepam) has a bioavailability F of 70%. A woman arrives unconscious in the emergency room with signs that a sexual ass…
When administering cpr, the nurse should locate the tip of the xiphoid by placin
When administering cpr, the nurse should locate the tip of the xiphoid by placing two fingers on xiphoid process and then placing the heel of the other hand just above this site o…
When agarose gel electrophoresis is used to study DNA. a. DNA is loaded near the
When agarose gel electrophoresis is used to study DNA. a. DNA is loaded near the positive electrode because it is negatively charged. b. Pieces of DNA are separated by size, with …
When all of the variation in a population is due to environmental sources and th
When all of the variation in a population is due to environmental sources and there is no genetic variation, broad sense heritability (H2): is zero and all of the phenotypic varia…
When aluminum metal is exsposed to oxygen gas a coating ofaluminum oxide forms o
When aluminum metal is exsposed to oxygen gas a coating ofaluminum oxide forms on the surface of the aluminum.the balancedequation for the reaction is 4Al(s)+3O2(g) 2Al 2O3(s) Sup…
When amino acids are used as an energy source, oxidative deamination occurs. pyr
When amino acids are used as an energy source, oxidative deamination occurs. pyruvic acid or one of the Krebs cycle acids (keto acids) is formed. urea is produced. all of the abov…
When an action potential from a motor neuron arrives at the neuromuscular juncti
When an action potential from a motor neuron arrives at the neuromuscular junction (NMJ), a series of events occurs that leads to muscle contraction. Which of the following events…
When an action potential reaches the nerve terminal: neurotransmitter molecules
When an action potential reaches the nerve terminal: neurotransmitter molecules are released from the nerve terminal, bind to and open the potassium channels on the cell body of t…
When an antibiotic is first introduced, it is very effective for treating infect
When an antibiotic is first introduced, it is very effective for treating infections. With increasing use of the antibiotic, the effectiveness declines and eventually the antibiot…
When an apple falls from the tree, its potential energy is converted into kineti
When an apple falls from the tree, its potential energy is converted into kinetic energy; as it hits the ground, its kinetic energy is converted into heat. Which law of thermodyna…
When an aqueous solution of hydroiodic acid, HI(aq), and an aqueous solution of
When an aqueous solution of hydroiodic acid, HI(aq), and an aqueous solution of ammonium carbonate, (NH42CO (aq), are combined, the gas carbon dioxide, CO2(g), is released from so…
When an enzyme denatures, which level(s) of protein structure are affected? Sele
When an enzyme denatures, which level(s) of protein structure are affected? Select Answer(s): primary structure secondary structure tertiary structure quaternary structure Identif…
When an herbivore chews on plant tissue, molecules called _______ are formed. Th
When an herbivore chews on plant tissue, molecules called _______ are formed. These molecules bind to a _______ in the plasma membrane of a _______ cell and initiate the formation…
When an integrated prophase excises, taking part of the host genome with it, it
When an integrated prophase excises, taking part of the host genome with it, it can transfer that DNA to a recipient by a process known as: conjugation. transformation. transducti…
When an invasive species alters the community structure is introduced to, what c
When an invasive species alters the community structure is introduced to, what can the consequence be? extinction of economically important species increased predation on some nat…
When an olfactory receptor is stimulated, what type of change must happen before
When an olfactory receptor is stimulated, what type of change must happen before it signals the brain that a change has occurred? Choose the best answer A generator potential must…
When analyzing data from cortex, we often try to understand what each neuron doe
When analyzing data from cortex, we often try to understand what each neuron does in terms of its inputs from other neurons - a specific kind of a systems identification strategy.…
When analyzing the amino acid sequences of the globin proteins shown in this fig
When analyzing the amino acid sequences of the globin proteins shown in this figure, which of the followi statements are true? A helix B helix C helix -V L[SPADKTNVKAAVNGKV GAHAGE…
When analyzing your mice experiment\'s data, you realize that the mice you bough
When analyzing your mice experiment's data, you realize that the mice you bought from Parker Laboratories are more susceptible to infection with Salmonella than mice obtained from…
When analyzing your mice experiment\'s data, you realize that the mice you bough
When analyzing your mice experiment's data, you realize that the mice you bought from Parker Laboratories are more susceptible to infection with Salmonella than mice obtained from…
When analyzingthe amino acid sequences of the plobin proteins shown in this figu
When analyzingthe amino acid sequences of the plobin proteins shown in this figure,which of the following statements aretrue E7 FS helli Human a globin Hnan ß globn AVAHVDDMPN S P…
When and Where Do Community-Level Trophic Cascades Occur (title) In aquatic syst
When and Where Do Community-Level Trophic Cascades Occur (title) In aquatic systems, control of plant community structure via trophic cascades has been demonstrated in a variety o…
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