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timama [110]
1 year ago
9

a typical human cell is approximately 12.00 μm in diameter and enclosed by a membrane that is 5.000 nm thick. what is the volume

of the cell including the membrane? to simplify the calculations, model the cell as a sphere.
Biology
1 answer:
Murljashka [212]1 year ago
3 0

Volume of cell including the membrane = 9.07* 10^11 nm³

Given data:

Diameter of human cell = 12.00 μm = 12,000 nm i.e. radius = 6000 nm

thickness of membrane enclosing the human cell = 5.00 nm

Total diameter of cell including membrane = 12,000+ (52) = 12010 nm

Solution:

Volume of cell (sphere) = 4/3πr^3

where: r = 12010 / 2 = 6005 nm

4/3 * π * (6005)^3 = 9.07 * 10¹¹ nm³

Hence, volume of cell aolng with membrane is 9.07 * 10¹¹ nm³

Learn more about Cell here:

brainly.com/question/13920046

#SPJ4

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Which of the following is a type of tissue in plants that is dead at maturity?
victus00 [196]

Answer:

The correct answer will be option-B.

Explanation:

The plant tissues are composed of three types of cells: parenchyma, collenchyma and sclerenchyma.

The parenchyma and collenchyma remain alive at their maturity but sclerenchyma loses their protoplasm and become dead. These cells deposit lignin in their secondary walls and form hard tissues of the plant-like hard shell of a coconut. Sclerenchyma provides mechanical strength to the plant.

Thus, Option-B is the correct answer.

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3 years ago
Consider this scenario between Josh and Julie Josh met Julie in line at a taco truck near campus and noticed she ordered extra h
Artyom0805 [142]

Answer:

The right matching of the scenario in the question are as follows:

1. OBSERVATION: Josh noticed that Julie ordered extra hot peppers and added hot sauce to her food  

2. QUESTION: Josh wondered how to cook spicy Mexican food.

3.  HYPOTHESIS: Josh decided jalapenos would be a good ingredient to add spice to the recipe.

4.  EXPERIMENT: After chopping the jalapenos, he slowly added some to the enchilada filling, tasting as he went until he thought it was spicy enough.  

5. RESULTS: Julie thought the enchiladas were delicious and exactly the right level of spice.  

6. CONCLUSION: Josh determined that since Julie liked the meal, adding jalapenos to the recipe was a good way to make it spicy.

Explanation:

Scientific method is an organized steps of procedures that scientists used to study and gather knowledge about different phenomenons. The systematic steps of scientific method start with observation, the observed phenomenon usually make a scientist to ask questions that he doesn't have an answer to. This will prompt him to formulate an hypothesis and set up an experiment to see if his hypothesis is true or not. The result he obtains from the experiment will determine the type of conclusion he will make about his earlier observation. By following these steps, scientists usually obtain useful  information that bring progress and advancement to humanity.  

5 0
3 years ago
Which activity causes the least amount of wetland and estuary degradation when it occurs near the coast?
krek1111 [17]

Answer:

The activity which causes the least amount of wetland and estuary degradation when it occurs near the coast is:

A. dune grass rehabilitation

Explanation:

This is actually a rehabilitation effort, unlike the other three options that cause land degradation.  A dune grass rehabilitation accretes sand and minimizes the rates of beach erosion. The program tries to protect coastal infrastructure and upland properties from storm damage by planting vegetation, fencing off sensitive areas, blocking storm surge, creating dune walkways, and absorbing wave energy.  During dune grass rehabilitation, activities that adversely affect the dunes are avoided.

4 0
2 years ago
Please fast answer, branliest for best answer
MariettaO [177]

Answer:

Enzymes attached with the body of substrate and speedup the reaction.

Explanation:

Enzymes attached with the body of substrate i. e. starch and increase the speed of break down and when the substrate is broken down, these enzymes detached from the substrate. Enzymes are the chemical substances present in the body of organism which helps to speedup the process of digestion. The digestion of starch starts from the mouth with the help of salivary enzyme and this starch is converted into smaller molecules which can be absorbed by the cells.

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What part of the female system is the usual site of fertilization of the ovulated oocyte?.
Paul [167]

Fertilization of the egg cell by the sperm usually takes place in the fallopian tube. The fertilized egg then travels to the uterus and implants in the endometrium.

<h3>What are fallopian tubes?</h3>
  • Fallopian tubes are also called oviducts or uterine tubes. It is the passage through which the egg enters the uterine cavity from the ovary.
  • Fallopian tubes are part of the reproductive tract. They have a smooth muscle wall, an inner mucous membrane, and an outer layer of loose supporting tissue (serosa).
<h3>Why does fertilization take place in the fallopian tubes?</h3>

The fallopian tube (oviduct) regulates fertilization through sperm induction and sperm hyperactivity. Sperm induction is achieved by rheotaxis, thermotaxis, and chemotaxis. Rheotaxis is caused by tubal fluid that creates a current flow from the tubal ampulla to the tubal isthmus.

To learn more about fallopian tubes visit:

brainly.com/question/12711470

#SPJ1

8 0
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