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Questions in biology

[Free] Two fruit flies that are heterozygous for body color and eye color are crossed. Brown body color is dominant to black body color. Red eye color is dominant to brown eye color. Determine the genotypes of offspring 1-8. 1 $\square$ 2 $\square$ 3 $\square$ 4 $\square$ 5 $\square$ 6 $\square$ 7 $\square$ 8 $\square$ \begin{tabular}{l|c|c|c|c|} \multicolumn{1}{c}{} & \multicolumn{1}{c}{ BE } & \multicolumn{1}{c}{ Be } & \multicolumn{1}{c}{ bE } & \multicolumn{1}{c}{ be } \ \multicolumn{1}{l}{ BE } & 1 & BBEe & BbEE & 2 \ \multicolumn{1}{c|}{$B e$} & $B B E e$ & 3 & $B b E e$ & $B b e e$ \ \multicolumn{1}{c|}{$b E$} & 4 & $B b E e$ & 5 & 6 \ \hline$b e$ & $B b E e$ & 7 & $b b E e$ & 8 \ \cline { 2 - 5 } \end{tabular}

[Free] In an experiment to show co-dominance, cows with white fur (W) were crossed with bulls with red fur (R). All the offspring of the F1-generation have roan fur (RW). A roan fur consists of patches of white and patches of red fur. Roan cows and roan bulls were crossed and the results are given below. \begin{tabular}{|l|c|c|c|} \hline Genotype & RR & RW & WW \\ \hline Number of offspring & 120 & 240 & 120 \\ \hline \end{tabular} QUESTION 32 A) Give the ratio of the different phenotypes shown in the table. B) Explain why the cows and bulls with genotype RW have roan fur and not only red or only white fur.

[Free] Fill in the blank question: Using microorganisms to degrade garbage in landfills, or to treat sewage, exemplifies the science of _______.

[Free] Which statements about fertilization are true? Select all that apply. It occurs in the upper posterior of the uterus. It results in a zygote. It is also known as ovulation. It requires gametes to meet. It can only occur on day 14 of the menstrual cycle.

[Free] was harmful to birds because it prevented them from laying eggs.

[Free] Teacher: Scientific Method Review Date: Directions: Match the appropriate term to its definition. Definitions may be used more than once. A. control D. inference G. prediction B. dependent variable E. independent variable F. observation H. scientific method C. hypothesis 1. Educated statement about the outcome of an experiment. 2. Variable being tested and changed by you. 3. Knowledge gained from the 5 senses, gives information to create hypothesis. 4. Variable that depends or changes in response to another variable. 5. An act of reasoning or interpretation, not a fact. 6. A guess about a future event. 7. Interpretation of an observation, or a statement, explaining the observation based on prior knowledge. 8. Treated the same as the experimental group except for one independent variable; used to prove that the independent variable caused an effect. 9. Process used to test a hypothesis. 10. Process of noticing and describing events or processes in a careful, orderly way. Critical Thinking: What part of scientific thinking is most apparent in this situation? Explain your reasoning. A bird watcher sees an unusual bird at a feeder. She takes careful notes on the bird's color, shape, and other physical features. Then she goes to a reference book to see if she can identify the species.

[Free] The medullary canal contains bone marrow, which is made of fat cells. Select one: A. blue B. green C. red D. yellow

[Free] What do parent and daughter cells have in common? Check all that apply. A. There is one parent cell and one daughter cell. B. There are two parent cells and two daughter cells. C. They contain copies of the same cellular components. D. They are exact copies of one another.

[Free] Which one of the following experiments would be considered acceptable in our society? A. Testing the effectiveness of a newly developed antibiotic using deliberate exposure of humans to antibiotic-resistant bacteria B. Determining the effects of cocaine use on babies born to cocaine-using mothers. C. Testing the effectiveness of a new AIDS vaccine using deliberate exposure of human volunteers to HIV. D. Determining the response of a patient's "incurable" cancer to a newly developed cancer drug. E. Testing the effects of radiation exposure on volunteers.

[Free] Why is soil porosity important for plant growth?