Answer and Explanation:
During an experiment, data from an experimental group are compared with the data of 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. This variable keeps constant in the control group.
- The experimental group is the one that receives the experimental procedure, with changes in the independent variable. There can be several experimental groups. In the exposed example, the experimental groups are the different types of food.
- In the control group, the variable measured keeps constant, not influencing the results. This isolates the effect of the independent variable on the experiment and helps to find alternative explanations to the different results. The control group corresponds to the normal dry food.
- Manipulated variable: Refers to all the variables in an experiment that provoke a response in another variable. They are also known as independent variables. The researcher can change these variables to see what changes it implies in an object, process, trait, or anything that depends on them. In the exposed example, the researcher manipulates the type of food he gives to the cat.
- Responding variable: Refers to the dependant variable, which response depends on any change in the independent variable. A change in the dependent variable might be proportional or inversely proportional to the change in the manipulated variable. In the exposed example, the dependent variable is the response of the cat to the change of food.
- constants Feeding time with each type of food (one week per food)
Sassy being healthy
Sassy being picky
Answer: D. The DNA sequences for the cytochrome c genes in chimpanzees and spider monkeys are over 90% identical.
Cytochrome c gene encodes for a protein that is very common among primates. This gene does not have undergone much changes during the process of evolution. Cytochrome c is a respiratory pigment found in the mitochondria of eukaryotes.
Answer: Phosphorous
Explanation:
Phosphorus and Nitrogen are similar in nature as they have 5 electrons in the outermost shell. Nitrogen and phosphorous belong to the same family on the periodic table.
As phosphorus lies just below nitrogen the characteristics of both the elements will be similar.
They are found abundant on earth and are cycle by biogeochemical cycle.
DNA is transferred from one bacterium to another. After the donor cell pulls itself close to the recipient using a structure called a pilus, DNA is transferred between cells. In most cases, this DNA is in the form of a plasmid. An F+ donor cell contains its chromosomal DNA and an F plasmid
The correct answer is C. It is so strict because a foreign species could compete with a native species and drive it to extinction.
The Hawaiian islands are one of the geographical isolated islands which faces the problem of the invasive species affecting the biodiversity of the island negatively.
The foreign species is equipped better to survive in the Hawaiian habitat and competes with the native species for the resources and food. The interaction and competition of the foreign species in the Hawaiian environment and habitat limits the resources for native species which increases the chance of the native species getting endangered.
The Hawaii Invasive Species Council along with other bodies such as department of agriculture, department of business and economic development, private and other government and non-government bodies have taken initiatives towards eradication of invasive species by strict laws.
