Keiko’s teacher was discussing the theory of endosymbiosis. She asked Keiko to mark the organelles in the diagram that most closely resembled prokaryotes. Which organelles should Keiko mark?

Answer:

Latitudes affect the climate by receiving different  amount of sunlight and wind.

Explanation:

Latitude may be defined as the angular distance of the north and south of the earth's equator.

Places present at high latitude receives less sunlight and have cold climate. Places present at low latitude receives large amount of sunlight and have warm climate.

Thus, the latitude affects the climate of an area.

Answer:

The variable

Explanation:

Dependent variables and independent variables in an experiment are defined as the terms of cause and effect.

The variables are:

• The dependent variable is the concentrated lactic acid and NAD+.
• Control is the response of NAD+ and lactic acid in the absence of vitamin treatment.

In the given experiment, the dependent variable is the concentrated lactic acid and that of NAD+, whereas the control is the response of NAD+ and lactic acid in the absence of vitamin treatment.

The given experiment is about respiration in which the electrons from glycolysis and Krebs cycle are transmitted to the electron transport chain. In the electron transport chain, reduction of NAD+ into NADH takes place.

Thus, the variables in an experiment are used to study the hypothesize the results.

To know more about variables, refer to the following link:

brainly.com/question/10415158

Answer:

(a).concentrated lactic acid and that of NAD+.

(b).use of the response of NAD+ and lactic acid in absence of vitamin treatment as the CONTROL.

Explanation:

To understand this question and be able to solve this question efficiently we have to understand the concept of "respiration''. But, the short and the most simple answer to the question above can be found in the first statement of the question.

The electron transport chain include the cycle that occurs during glycolysis, fermentation and the transformation of NAD+ to form NADH and vice versa.

In the research, the dependent variable is the concentrated lactic acid and that of NAD+.

In order to increase the validity of the experiment, the Researcher can make use of the response of NAD+ and lactic acid in absence of vitamin treatment as the CONTROL.

Answer:

e. cAMP receptor protein (CRP) and RNA polymerase.

Explanation:

Lac operon is a type of inducible operon which can be controlled positively or negatively. A positively controlled operon is the one which is controlled through an activator while negatively controlled is the one which is controlled through a repressor. The inducer in case of lac operon is cAMP receptor protein (CRP) which forms a dimer and makes interaction in the upstream region of promoter of lac operon so as to facilitate transcription. Repressor in case of lac operon is a tetrameric protein which binds the operator region of lac operon and prevents gene expression by restricting RNA polymerase from facilitating transcription.

When lactose is present in high concentrations and glucose is in low concentration in the culture medium for a wild type E. coli strain, the control will be negative as well as positive.

If the glucose level is very low, an enzyme known as adenylyl cyclase becomes active and produces cAMP, this cAMP then forms a dimer by interacting with CRP to form a cAMP-CRP dimer which acts as an activator and binds to the upstream of lac promoter and helps RNA polymerase to initiate transcription.  

Also because of high lactose concentration, lactose isomerises into allolactose which acts as an inducer and interacts with repressor to remove it from operator region. As soon as repressor is removed from the operator region, RNA polymerase starts transcription.

Answer:

Objective lens

Explanation: