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2 years ago

What is the definition of bond

Biology

2 answers:

Marta_Voda [28]2 years ago

7 0

An agreement with legal force

professor190 [17]2 years ago

6 0

A thing used to tie something or to fasten things together.

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Possible question and essays for gr 12 Life Scences

love history [14]

Answer:

Explanation:

Possible Essays for Life Science:

1. "Explain four management strategies to improve the quality of drinking water. Uncle Two sources of water pollution and Two effect of water pollution on human health. "

2. "Eutrophication is one of most important water quality problem South Africa. Describe Eutrophication, what causes it and how it affects water quality."

3. "Describe the significance of DNA replication and meiosis and how the foetus is protected and nourished in the uterus."

4. "Describe how meiosis contribute to genetic variation and how

abnormal meiosis leaf to down syndrome and polyploidy. Also

describe advantages of polyploidy in agriculture. "

5 0

3 years ago

A spheroidal bacterium with a diameter of 1 mm contains 2 molecules of a particular protein. What is the molar concentration?

creativ13 [48]

Answer : The molar concentration is, $6.35\times 10^{-18}mol/L$

Explanation :

First we have to calculate the moles of protein.

$\text{Moles of protein}=\frac{\text{Number of molecules of protein}}{\text{Avogadro's number}}$

Number of molecules of protein = 2 molecules

Avogadro's number = $6.022\times 10^{23}molecules/mol$

$\text{Moles of protein}=\frac{2\text{ molecules}}{6.022\times 10^{23}molecules/mol}=3.32\times 10^{-24}mol$

Now we have to calculate the radius.

Radius = $\frac{Diameter}{2}=\frac{1mm}{2}=0.5mm=5.0\times 10^{-4}m$

Conversion used : (1 mm = 0.001 m)

Now we have to calculate the volume.

$V=\frac{4}{3}\pi r^3$

$V=\frac{4}{3}\times 3.14\times (5.0\times 10^{-4}m)^3$

$V=5.23\times 10^{-10}m^3=5.23\times 10^{-7}L$

Conversion used : (1 m³ = 1000 L)

Now we have to calculate the molar concentration.

$Concentration=\frac{\text{Moles of protein}}{\text{Volume}}$

$Concentration=\frac{3.32\times 10^{-24}mol}{5.23\times 10^{-7}L}$

$Concentration=6.35\times 10^{-18}mol/L$

Thus, the molar concentration is, $6.35\times 10^{-18}mol/L$

4 0

3 years ago

1. A woman is brought to an emergency room complaining of severe pain in her left iliac region. She claims previous episodes and

SSSSS [86.1K]

Answer:

1), Diverticulitis

2) Lack of Lactase

3) Bacterial infections

Explanation:

-Diverticulitis is a condition in which the diverticula become inflamed. This woman has diverticulitis due to the inflammation of her diverticula.

-Lack of lactase (lactose intolerance); add lactase drops to milk before drinking it.

-Appendicitis is caused by bacteria infection. If untreated, bacterial proliferation may cause the appendix to rupture, resulting in contamination of the peritoneal cavity with feces and life-threatening peritonitis.

5 0

3 years ago

Which ecological relationship is best represented by this graph?

sertanlavr [38]

Answer:

mutualism

Explanation:

6 0

2 years ago

Which of the following statements is true?

Studentka2010 [4]

Earth's atmosphere helps maintain a constant temperature.