BIOS 255 Lab Practicum Review – Qs And As Which of the following refers to making changes to better suit a new or changing environment? ✔️Ans - Adaptation This is when an organisms adjust in order to get used to changes in its environment. ✔️Ans - Acclimatization This is a physiological response to external or internal stimulus such as heat or sound. ✔️Ans - Response to Stimuli The tendency for similar cells to group together into tissues in the body.✔️Ans - Organization In the scientific method this is a variable that can be manipulated or adjusted - this is the variable that they experimenter controls. ✔️Ans - Independent Variable This is the variable that is being tested, what is being measured in the experiment. ✔️Ans - Dependent Variable When a hypothesis states that there will be no significant difference in the outcome of the experiment. ✔️Ans - Null Hypothesis In the "Efficacy of a new facial cream" lab activity, which of the following would be an acceptable null hypothesis? ✔️Ans - The facial cream has no effect on the resolution of acne lesions.In the "Efficacy of a new facial cream" lab activity, what would be the dependent variable? ✔️Ans - Acne lesion progression In the "Efficacy of a new facial cream" lab activity, what is the purpose of the placebo group?
- To provide a baseline for acne occurrence without treatment.
- To help ensure that any results seen are due to treatment and not random
- To provide the researchers with an alternative treatment option. ✔️Ans -
occurrence.
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Which of the following is true of Prokaryotic cells? ✔️Ans - Cells without a nucleus.This defines a phospholipid. ✔️Ans - Molecule found in membranes with amphipathic properties.Specialized structure within a cell that performs a function ✔️Ans - Organelle Found in plants, this is responsible for photosynthesis ✔️Ans - Chloroplast This is found in cells and is responsible for making proteins ✔️Ans - Ribosomes Bubbles have characteristics that make them similar to a cell membranes and other characteristics that make them unlike a cell membrane. Which of the following is a characteristics that makes a bubble similar to a cell membrane?✔️Ans - The bubble is a barrier that separates the inside contents from the outside.In Prokaryotic cells the DNA is located in the ________, and in Eukaryotic cells the DNA is located in the ______. ✔️Ans - cytoplasm, nucleus Which of the following is true regarding the comparison of prokaryotic and eukaryotic cells? ✔️Ans - Prokaryotic cells are smaller and less complex than Eukaryotic cells.This organelle contains enzymes to degrade and dispose of cell waste ✔️Ans
- Lysosomes
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Interconnected tubules and filaments that provide structure and support for the cell. ✔️Ans - Cytoskeleton A cell with one complete set of chromosomes (unpaired) is called ✔️Ans - Haploid In this week's exercise (Exercise 12, activity 2) you created a Punnett square for goats with black fur dominant over red fur. A homozygous black female is