Biology

Which statement describes the light reaction of photosynthesis?OCarbon dioxide is put together with glucose.OWater molecules are split apart.OAir and water create energy for a plant.O Water molecules are combined to make food.
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In all of these phylogenetic trees, the gain or loss of a trait is represented by a red trait mark. These marks are a way of showing change---that is, evolution. Which tree does the best job of showing which branches are evolving?
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A researcher incubates a cell with radiolabeled amino acids. These amino acids are incorporated into the proteins as they are synthesized by the cell. Select which piece of data would indicate the incorporation of radiolabeled amino acids during protein synthesis? A)Radioactivity levels would increase first at the nucleus, followed by the Golgi, and then the cell membrane. B)Radioactivity levels would increase first at the nucleus, followed by the ribosomes, and then the secretory vesicles. C)Radioactivity levels would increase first at the rough endoplasmic reticulum, followed by the Golgi, and then the secretory vesicles. D)Radioactivity levels would increase first at the rough endoplasmic reticulum, followed by the nucleus, and then the secretory vesicles.
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In the 1600's, Robert Hooke, and English scientist, used a crude microscope to examine bits of cork. Cork is derived from the bark layer of certain trees. Upon seeing the cork under the microscope, Hooke named the spaces within the cork 'cells', because they looked like empty rooms of a monastery. Although he coined the term cell, an ironic feature of cork is that it is dead plant material. Knowing this, what feature of cells would Robert Hooke NOT have been able to observe under the microscope while looking at cork?
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Humans, chimpanzees, gorillas, and orangutans are members of a clade called the great apes, which shared a common ancestor about fifteen million years ago. Gibbons and siamangs comprise a clade called the lesser apes. Tree-branch lengths indicate elapsed time.Assuming chimps and gorillas are humans' closest relatives, removing humans from the great ape clade and placing them in a different clade has the effect of making the phylogenetic tree of the great apes _____.A) polyphyleticB) paraphyleticC) monophyleticD) into a new order
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Convergent evolution is said to have occurred if the mouse species on two islands with similar habitats are found to have similar characteristics even though they originated from different species that did not have these characteristics.A. TrueB. false
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Which idea was Lamarck's theory of Evolution based upon?natural selectionvariation in populationsinheritance of acquired traitsdescent with modification
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If intelligence is determined primarily by heredity, which pair should show the highest correlation between IQ scores?
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Match the following terms and definitions 1. gene alternate forms for a specific gene 2. allele a genetic characteristic of the individual 3. trait a portion of DNA which codes a specific heredity trait 4. chromosome a thread-like molecule in the nucleus composed of DNA chromosome a genetic characteristic of the individual
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Which is true concerning muscle tissue? Select one: a. cuboidal shape enhances function b. highly cellular and well vascularized c. contains contractile units made of collagen d. is a single-celled tissue
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Explain how high blood cholesterol develops in someone with a genetic disorder versus someone who eats a high-fat diet
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Students use a microscope to look for structures present in four different cells. The students placed an X for each structure that was viewed for each cell on the table shown.Which cell that was viewed is most likely a prokaryote?A. Cell WB. Cell XC. Cell YD. Cell Z
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Land plants are divided into two main groups. They are ________________ and _______________.
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Heartbeat, digestion, respiration, and elimination of wastes are carried out by organ systems close to the central axis. These functions, close to the center of the body, operate or are ready to operate when the child is born. What principle of development does this represent?
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please can someone help? Questions attached :)
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"You begin an experiment with two populations of E. coli that are each composed of 100 cells. The cells are all genetically identical (i.f., they are clones). You grow these populations in flasks on a lab bench under identical conditions with sufficient resources for the survival of all individuals. What process will introduce genetic variation into these populations?"
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In proteins, amino acids are linked by peptide bonds; in polynucleotides, nucleotides are linked by ________.
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25 POINTS Hi!! I really need some biology help!!! Please help with all the questions!
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A relationship in which one organism depends on another for nourishment or some other benefit is specifically known as _____.
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In one experiment, Katherine observes that one of her cultured neurons responds to a rapid series of inputs at a single synapse by producing an action potential. In another experiment, she demonstrates that another cell responds to inputs at multiple synapses by producing an action potential. Katherines first experiment demonstrates ______________ and her second experiment demonstrates _______________.
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Last night in class, Upe asked her instructor about the flow of positive and negative ions into and/or out of a cell. Her instructor told her that the two processes involved in this movement are: A. diffusion and electrostatic pressure. B. glia and microglia. C. agonists and antagonists. D. voluntary and involuntary.
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State whether each of the following statements is true or false, and explain your choice: a. The chromosomes in a somatic cell of any organism are all morphologically alike. b. During mitosis, the chromosomes divide and the resulting sister chromatids separate at anaphase, ending up in two nuclei, each of which has the same number of chromosomes as the parental cell.
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The cooking of eggs on a hot stove is an example of which of the following?Chemical propertyChemical changePhysical propertyPhysical change
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Uses of bacteriophage in genetic engineering
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