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Questions in biology

[Done] Why are misunderstandings of how natural selection works so common? A. Many people believe in intelligent design. B. Most people don't understand how genes are responsible for traits. C. Natural selection is no longer acting on living things. D. Incorrect analogies are used in business or social situations.

[Done] Consider the table. Types of Bacteria \begin{tabular}{|c|c|c|} \hline Coccus & Shape & Associated disease \\ \hline Bacillus & X & Strep throat \\ \hline Spirillum & Rod shaped & Y \\ \hline \hline \end{tabular} Which best describes $X$ and $Y$? A. $X =$ Spherical; $Y =$ E coli B. $X =$ Comma shaped; $Y =$ Whooping cough C. $X=$ Oval shaped; $Y=S$. aureus D. $X=$ Rod shaped; $Y=$ Pneumonia

[Done] Richard was on a global trek to identify different species across the world. In his journal, Richard recorded an observation he made as "latitudinal variation in species richness." Which statement describes the meaning of what Richard recorded in his journal? A. He found more species as he moved from the equator to the poles. B. He found more species in the temperate zones. C. He found more species towards the western hemisphere. D. He found more species as he moved from the poles to the equator. E. He found fewer species in the southern hemisphere.

[Done] Cyanobacteria have been engineered to produce isobutanol directly. What advantage does this have over a inherently renewable fuel source? A. Multiple processing steps can be avoided. B. They produce chemical energy through photosynthesis. C. They make a biofuel alternative to gasoline.

[Done] Determine if the following statement is true or false, and why. "All mutations are harmful and increase the risk of diseases such as cancer." A. True B. False, it should read "Some mutations may be beneficial, but many are harmful and increase the risk of diseases such as cancer." C. False, it should read "All mutations are beneficial" D. False, it should read "Some mutations may be harmful and increase the risk of diseases such as cancer, but many are beneficial"

[Done] Which of the following accurately describes the difference between cell types in the body (e.g., heart cells and liver cells)? A) They have different DNA and thus express different genes. B) They have the same DNA, but express different genes. C) They have the same DNA and they express the same genes.

[Done] Is the return to negative potential as K+ exits through voltage-gated K+ channels hyperpolarization, repolarization, threshold, depolarization, or all-or-none?

[Done] Directions: Construct a Punnett square using the given genotype and identify its phenotype. Write your answer on your one whole sheet of paper. I. Under Mendelian Genetics, Law of Dominance Parents' Allele - E - Attached earlobes, e - unattached earlobes 1. Ee x ee 2. Ee x Ee 3. Ee x ee 4. Ee x Ee Parents' Allele - W - white skin, w - dark skin 1. Ww x Ww 2. Ww x Ww 3. Ww x ww 4. ww x Ww II. Under Incomplete Dominance Allele - C - straight hair, e - wavy hair 1. CC x ee 2. Ce x Ce 3. Ee c Ce Allele - B brown chicken, a - white chicken 1. BB x aa 2. BB x Ba 3. Aa x Ba Allele - W - white flower, f - red flower, Wf - pink flower 1. Ww x ff 2. Ww x Wf 3. Wf x Wf Allele - H - white wolf, h - black wolf. 1. HH x Hh 2. hh x hh 3. Hh x Hh

[Done] The fluid that lubricates the articular cartilage of articulating bones in a synovial joint is called _______ fluid.

[Done] Which of the following statements is true? A. When estrogens and testosterone decline in women, their mating preferences change. B. Researchers are exploring and debating whether women's mating preferences change across the menstrual cycle. C. Women's mating preferences do not change based on the timing of ovulation. D. Changes across the menstrual cycle do not affect women's mating preferences.