During a routine cleaning of the incubators in a college laboratory, a student accidentally increased the temperature of one incubator from 37℃ to 40℃. The next day when the students checked on the cells, they found that the cells in the incubator at 40℃ grew more than those in the incubator at 37℃. The students decided to test this observation through an experiment. (a) State the hypothesis for this investigation. (b) Identify the independent and dependent variables. *

Hypothesis: If there is an increase in the temperature the number of cells increases.

The independent variable: different temperatures.

dependent variable: number of cells.

Explanation:

The hypothesis is a possible explanation for any phenomenon that occurs in nature, which is based on prior knowledge or evidence and can be tested with the help of the scientific method.

The independent variable is a variable that is subject to change and manipulated in an investigation and affects the dependent variable, in this case, different temperatures are the independent variable.

the dependent variable is the variable that depends on the independent variable and helps in finding the result and conclusion of the effect.

parasites can detrimentally affect their host, but also must not allow their host to die before they can complete their life cycle. some parasites have complex life cycles with many different hosts, and have had to find ways of persisting in many different environments during the change from one host to another. ectoparasites live outside the body of the host, and can more easily  disperse, but are  more exposed to predators, parasites, parasitoids. endoparasites live inside the body of the host, and are therefore protected from the outside environment. but they can be  attacked by the host's immune system. they have therefore developed  mechanisms for dispersal such as  complex life cycles.