Answer:
16. Control group: Subject A
17. Independent (manipulated) variable: Type of powder
18. Dependent variable: Itching time
19. Explain whether the data supports the advertisement´s claims about its product. Yes, it does.
Explanation:
- Control group: The control group is used to identify if there are any other factors influencing the results obtained by the treatment in the study (in this case, the new product), from the results that might be a consequence of other factors. The control group must be selected from the same population as the treatment group. Data from an experimental group are compared with the data from a control group. These two groups are identical in all aspects except for the independent variable that the researcher changes in the experimental group to observe how they affect the individuals.
The experimental group is the one that receives the experimental procedure, with changes in the independent variable. There can be several experimental groups. In this case, the experimental group is subject B.
- Independent (manipulated) variable: Refers to all the variables in an experiment that provoke a response in another variable. An independent variable is the one that changes or is controlled and modified in the experiment to analyze how another variable responds to it. It changes to analyze its effects on the dependent variable. Usually, the independent variable is represented by the X letter. In the exposed example, the type of powder is the independent variable.
- Dependent variable: Refers to the variable, which response depends on any change in the independent variable. It represents a quantity of something which value depends on how the independent variable is modified. The change in the dependent variable might be proportional or inversely proportional to the change in the manipulated variable. It is usually identified by the letter Y. In the exposed example, inching time is the dependent variable, that depends on the type of powder used.
- The data <u>does support</u> the advertisement´s claims about its product. The effect of the new product lasts 50% more than the original product. The old powder produced itching for 30 minutes, while the new product produced itching for 45min (15 more minutes, 50% more).
C) Ability to roll the tongue is inherited.
Length of hair is conditional upon the environment, not necessarily genetics.
Ability to play piano is taught not passed through genetics.
Appetite of a puppy depends on nutrition amount.
Answer:
Microbes, salts, and pollution from agriculture and industry all contribute to the problem. Global warming will likely have major impacts on the world's freshwater resources.
Explanation:
Water source protection involves the protection of surface water sources and the protection of groundwater sources from contamination of any kind. Water source protection includes basic measures and rules such as the installation of a fence around the source or the banning of grazing animals in the surrounding area.
Answer
(From top left to the bottom) Neisseria gonorrhoeae, Herpes Simplex virus, Human papillomavirus (HPV)
(From top right to the bottom) Theponema pallidum, Chlamydia trachomalis, Candida albicans
Explanation:
Neisseria gonorrhoeae: infected individuals may experience pain when urinating or during sexual intercourse. It may be accompanied by unusual discharge (white, creamy or green) from the vagina or penis
.
Herpes Simplex virus: causes painful sores around the lips and genitals. These sores are contagious
.
Human papillomavirus (HPV): a viral STI, it appears as warts on the male and female genitals when a person is infected. These look like a cluster of pimples
Theponema pallidum: also known as syphilis, it is characterized by painless sores around the mouth or genitals. The sores may later develop into rashes.
Chlamydia trachomalis: may not have any symptoms but if there are any, they include discharge from the vagina or penis
.
Candida albicans: is a fungal infection that produces vaginal discharge that looks like cottage cheese
.
Contrastingly, when the plant cells are placed in distilled water, the concentration of water molecules is greater out of the cell than it is in the cell and therefore water moves into the cell by osmosis down the concentration gradient.
