Before biologists discovered the role of DNA and chromosomes, Gregor Mendel, a scientific researcher, studied the genetics of pea plants related to flower colors, pea colors, pea pod shapes, and other features of the plant. He numerically modeled the results he observed and published results, which eventually led to our basic understanding of how biological traits are passed to new generations of organisms. His work, however, was largely rejected for over 30 years, partly for minor record-keeping errors, and partly for the new approach of defining reproduction of organisms in terms of numerical probabilities. This demonstrates that
A. only the most recent scientific investigations on a topic are useful in understanding biological conditions or processes.
B. Gregor Mendel's work wasn't valid until researchers later identified chromosomes and their role in reproduction.
C. a unique, new way to propose a theory discredits the research until someone else proves findings to be true.
D. the color and shape of peas was not important to the scientific community.
E. scientific evidence is harder to accept because of cultural biases and misunderstandings on the topic.
E. scientific evidence is harder to accept because of cultural biases and misunderstandings on the topic.
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In reciprocal translocation, two homologous chromosomes exchange segments
_________________ Indicate whether the statement is true or false.
As a result of mitosis, each of your body cells
A) contains only the genetic information needed for that type of cell. B) changes genetically as you grow and develop. C) contains unique genetic information. D) is genetically identical to all other body cells.
Steroid hormones can diffuse into all cells of the body; however, not all cells respond to steroid hormones. Why?
A) Not all cells contain the genes necessary to respond to steroid hormones. B) Only cells displaying plasma membrane receptors can respond to a lipid-soluble hormone. C) Not all cells are lipid soluble and therefore they cannot respond to steroid hormones. D) Only cells containing cytoplasmic or nuclear receptors to the steroid hormone can respond. E) Only cells with surface protein receptors can respond to steroid hormones.
The limbic system in the central nervous system sustains many vegetative functions in mammals and is closely associated with structures that process cues about _____
A) olfaction B) vision C) audition D) mechanosensation