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Questions in biology

[Answered] With regard to brain development, what is the definition of the phrase 'window of opportunity'? A. The period during which specific kinds of experiences are most likely to wire and strengthen specific skills. B. The period during which children are most likely to learn a second language. C. The period during which parents have the best opportunity to change a child's personality. D. The period during which the mind is best suited to process and recall large amounts of information.

[Answered] A student does an experiment for a science fair to study whether temperature affects the timing of a cricket's chirps. The student keeps a cricket in an enclosed box that is heated to different temperatures each day for twelve days. The student records the cricket's chirps by using a sound-activated microphone so that the timing of the chirps can be measured. The student records the results of the experiment in the table below. | Day | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | Temperature ($^{\circ}C$) | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | | Average time between chirps (sec) | 2.5 | 2.6 | 2.2 | 2.3 | 2.0 | 1.8 | 1.9 | 1.8 | 1.4 | 1.2 | 1.5 | 1.1 | Which generalization can be made from the data in the table? A. The higher the temperature, the fewer chirps there will be in 10 seconds. B. The chirps occur closer together as the temperature increases. C. The chirps become farther apart as the temperature increases. D. There is no relationship between temperature and the time between chirps.

[Answered] What is the role of troponin C in muscle contraction? A) It forms cross bridges with actin. B) It binds calcium ions, leading to muscle contraction activation. C) It prevents muscle contraction by blocking myosin. D) It provides structural support to myofibrils.

[Answered] What is the term that describes when one gene for a trait completely masks the effect of another gene for the same trait? A. Complete dominance B. Co-dominance C. Incomplete dominance D. Over-dominance

[Answered] ACTIVITY 1. What are the common signs of estrus? 2. What are ways of identifying silent heaters? 3. What are the different Systems of Breeding? 4. What are the different Systems of mating and their advantages?

[Answered] Two daughter cells are most likely to inherit which one of the following from the parent cell? A) a change in a nucleotide in mRNA B) a change in a nucleotide in tRNA C) a change in a nucleotide in rRNA D) a change in a nucleotide in DNA E) a change in a protein

[Answered] Which level of organization is best represented by the liver? A. tissue B. organ C. organism D. organ system

[Answered] Which of the following best describes the length-tension relationship in skeletal muscle? A. Tension increases with sarcomere length until it reaches a maximum at full extension. B. Tension is independent of the length of the sarcomere. C. Tension decreases as sarcomeres are in resting length. D. Tension is maximal when the sarcomeres are at their normal resting length.

[Answered] What term describes the movement of genes from one species to a different species? A. Adaptation B. Homozygous C. Transformation D. Gene gun

[Answered] A sequence of nucleotides in DNA that codes for a functional product refers to a(n) A. gene B. genome C. proteome D. protease