The structure of cells has changed significantly over time. What concept explains the presence of mitochondria in cells?

Answers

Answer 1

Answer:

The concept that explains the presence of mitochondria Is called Endodymbiosis.

Hope that helps

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The structure that surrounds the cytoplasm in a bacterial cell is the A. ribsosome.
B. plasma membrane.
C. cell wall.
D. nucleoid

Answers

It will be:

C. cell wall

What is the term for a method farmers use to bring water to their fields from rivers and aquifers?

Answers

the term is irrigation

The graph illustrates the activity level of three common digestive enzymes, across a range of pH values. Which enzyme is likely to be active in the acidic environment of the stomach?A)
pepsin
B)
trypsin
C)
amylase
D)
pepsin and trypsin

Answers

Answer: A) Pepsin

Explanation: Acidic solutions are solutions which provide H^+ ions .More is the H^+ ion concentration, more acidic is the solution.

pH of a solution is defined as negative logarithm of H^+ ions concentration.

$pH =- log{[H^+]}$ or

$pH = log(1)/([H^+])$

Thus lesser is the pH,more is the H^+ concentration and more acidic is the solution.

Thus acidic solutions have low pH and pH ranges from 1 to 7 for acidic solutions.

As can be seen from the graph, enzyme pepsin has highest activity at low pH which means in acidic solutions. As the pH is increasing or the solution is turning basic, the activity of pepsin decreases.

I think amylase as well

In the human body, only certain cells undergo fertilization. what is another process that only these type of cells undergo?

Answers

Mitosis im sure of it. =^_^=

Nit mitosis. Mitosis is only for body cells. Only sex cells undergo meiosis and fertilization.

A root is absorbing water from the soil. Which route will the water travel inside the root? A. Cambium --> phloem --> xylem --> stele --> endodermis --> cortex --> epidermis/// B. Xylem --> phloem --> endodermis --> stele --> epidermis --> cortex --> cambium ///C. Epidermis --> cortex --> endodermis --> stele --> xylem --> phloem --> cambium

Answers

The router through which water will travel inside the root is Xylem --> phloem --> endodermis --> stele --> epidermis --> cortex --> cambium. The correct option among all the options that are given in the question is the second option or option "B". I hope that this is the answer you were looking for and it has helped you.

Answer:

Option B, Xylem --> phloem --> endodermis --> stele --> epidermis --> cortex --> cambium ///

Explanation:

The start of water transportation via roots takes place through the Xylem as these are the specialized cell in roots to intake water from the ground. These cells are arranged in the form of layer and filters the water before transporting. After the filtration in Xylem, water then passes to phloem (which are also part of conducting system of plants and runs parallel to the xylem). After the phloem, water then goes to the central part of the root which is known as stele and then it reaches the epidermis. From epidermis , absorbed water then goes to the cortex of other tissues and organ and finally it reaches the cambium.

Hence, option B is correct

Which of the following protozoans is most likely to cause digestive system disorders?

Answers

Entamoeba from phylum Sarcodina

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