Biology

Myocardium (cardiac muscle tissue) must rhythmically contract for a lifetime. This requires a considerable amount of energy production by the cells. You would expect to see a relatively high amount of which organelle in these cells?a.smooth endoplasmic reticulumb.mitochondriac.lysosomesd.cytoskeleton
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If you wanted to repeat your experiment, you could do it once, then do it again, and so on. You could also _____.A.complete more than one trial at onceB.pick a procedure that takes less time to completeC.ask another group of scientists to do the same experimentD.copy your results several times and change the numbers a bitl trial
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the process of clearly identifying how a variable is measured is referred to as
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Where are the richest deposits of oil and natural gas most likely located?A.) deep zoneB.) intertidal zoneC.) Continental shelves
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2. Membranes are the barriers that separate the inside "living" part of a cell from the outside "non-living"surroundings. Given that all new materials entering the cell must first cross the membrane, and giventhat there is a limit to how much "stuff" can cross a unit area of membrane in a given time, explain howthis might set an upper limit on how big a single cell can be. In composing your answer, describe therelation between cell size, cell volume, and cell membrane area (see your textbook for a detailsdiscussion). (3 points)
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Explain how is segmentation related to the development of a brain in earthworm?
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Since photosynthesis is a metabolic pathway plants use for transforming sunlight energy into carbohydrates, what is lost during the energy transformation process
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You are a doctor in a hospital, and a patient is experiencing trouble with her skin repairing itself from a cut. The patient is also expecting a child, but the cells in the reproduction development are experiencing malfunction in cell division. Describe the stages of each type of cell reproduction process from a normal patient whose body cells can repair themselves and normal cell division during the reproductive development of the unborn baby. Explain the disadvantages and advantages of each type of cell division. Discuss how the patient experiencing problems with the cells repairing from the cut and the child's reproduction development malfunctions can alter haploid and diploid cell development.
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When conducting an experiment on how stimuli are represented by the firing of neurons, you notice that neurons respond differently to different faces. For example, Arthur's face causes three neurons to fire, with neuron one responding the most and neuron three responding the least. Roger's face causes the same three neurons to fire, with neuron one responding the least and neuron three responding the most. Your results support coding. Group of answer choices 1. specificity 2. population 3. convergence 4. divergence
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When performing neurological reflexes on the infant, which primitive reflex will be present longest?
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Lipids provide a significant energy reserve. form essential structural components of cells. help to maintain body temperature. cushion organs against shocks. All of the answers are correct.
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Two parts of the Plasmodium erythrocytic cycle affect the human host in the follow ways. The ...................is responsible for the clinical symptoms of malaria in one human host, and the.................... releases spores into the human's blood that make it possible for the malaria to be passed on to a......................and then to another human
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Judging and evaluaing advertisement requires confusing. thinking. because
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How does compact bone differ from spongy bone?
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What category of drugs in the five-category system is reported to have fetal risks but can be used in a pregnant woman if the potential benefit outweighs the risk?
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In organisms blank are encoded in segments of its Chromosomes called blank
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Thermal motion promotes lateral position exchanges between lipid moleculaes within a monolayer. In an artificial bilayer of lipids, this movement has been estimated to be ~ 2 um/second. On average, do you expect the lateral movement of a lipid molecule within a biological membrane to be equally fast?
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"Sometimes during DNA replication a change in the DNA nucleotide sequence, which is called a mutation, can occur. There are various reasons why mutations occur. In certain instances, a chemical called _______ can increase the mutation rate."
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After stamping your replica plates, you return to examine the results and see that there are 100 colonies on the strep nal plate from master plate strain B and no growth on the strep nal plate from master plate strain A. Which strain (A or B) is the streptomycin-resistant master plate strain
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The causative agent of botulism, a deadly form of food poisoning, is an endospore-forming bacterium called Clostridium botulinim. Why might it be difficult to kill this bacterium in contaminated food?
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Which of the following does not cause blood pressure to rise? Growing taller eating animal fats, being young?
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3. What material does the nucleus contain? What is the purpose of this material? The nucleus contains "the cell's genetic material, DNA." DNA makes protein molecules to help with almost every cellular process.
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Osteoblasts are cells that are involved in creating new extracellular matrix in bone. a. The extracellular matrix of cartilage contains only one type of cell, which are the Chondroblasts.b. The perichondrium is a structure that surrounds cartilage and contains the Chondrocytes.c. Bones are continually remodeled, a process that requires that old bone matrix be broken down by Osteoclasts.d. Lacunae of compact bone are occupied by mature Osteocytes.
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Polypeptide and monoamine hormones typicallya. bind with receptors in the cell nucleus. b. bind with receptors in the cell membrane. c. produce their effects within seconds following secretion. d. bind with low affinity to receptors.
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