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I am Lyosha [343]
3 years ago
14

What are "blank" cells called?

Biology
1 answer:
JulijaS [17]3 years ago
7 0
If you are checking a cell for a zero value and the cell is blank, the test evaluates to true. For example, if you have the following formula in cell A1 =IF(B1=0,"zero","blank") and B1 is blank, the formula returns "zero" and not "blank" as expected.

If the range might contain a blank cell, you should use the ISBLANK function to test for a zero value, as in the following example: =IF(ISBLANK(B2),"blank",IF(B2=0,"zero","other")) Note that the above formula returns "zero" if there is a zero value in the cell, "blank" if the cell is blank, and "other" if anything else is in the cell.

You must always use the ISBLANK formula first before you test for a zero value. Otherwise you will always return a "true" for the zero value, and never get to the test for the ISBLANK formula.
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An experiment is designed to study the mechanism of sucrose uptake by plant cells. Cells are immersed in a sucrose solution, and
wolverine [178]

Answer:

A proton Pump, using ATP, pumps protons outside

A steady proton gradient with a higher concentration of H+ out of the cell is maintained by the proton pump.

pH decreases;

The gradient becomes sufficient.

H+ moves down electrochemical gradient into the cell; Sucrose moves into the cell.

Explanation:

A proton Pump, using the energy of ATP hydrolysis, pumps protons outside the cell.

A steady proton gradient with a higher concentration of H+ out of the cell is maintained by the proton pump.

The continues outward pumping of protons by the proton pump causes the pH of the extracellular fluid to decrease

At some point the gradient becomes sufficient, and pH reaches a steady slightly acidic level.

H+ moves down its electrochemical gradient into the cell together with Sucrose through the hydrogen ion-sucrose co-transporter.

6 0
3 years ago
Which statement best explains why a karyotype can be used as a scientific report
tresset_1 [31]

The correct answer is:

"A karyotype can be used for reporting medical concerns and possible genetic disorders

Explanation;

A Karyotype is the number of the chromosome in a cell. In humans, the typical amount of chromosomes is 46. Seldom humans have a varying number of chromosomes and then the karyotype (for example the number) can be used for inscribing for example of genetic disorders- so the answer is that it can be used for reporting of genetic disorders.


4 0
3 years ago
Read 2 more answers
Find the remainder when p(x) = –2x5 + x4 + 5x3 + 4x + 1 is divided by (x - 2).
borishaifa [10]

The remainder when p(x) = -2x⁵+x⁴+5x³+4x+1 is divided by (x-2) is 1.

To solve the question above, we make use of the remainder theorem.

Remainder Theorem: It states that if a function F(x) is divided by (x-a), the remainder is F(a).

From the question,

Given:

  • Dividend ⇒ p(x) = -2x⁵+x⁴+5x³+4x+1
  • Divisor ⇒ (x-2)

in view of the above and applying the Remainder theorem, The remainder will be p(2)

  • p(2) = -2(2⁵)+2⁴+5(2³)+4(2)+1
  • p(2) = -64+16+40+8+1
  • p(2) = 1

hence the remainder when p(x) = -2x⁵+x⁴+5x³+4x+1 is divided by (x-2) is 1

Learn more about  the remainder theorem here: brainly.com/question/13328536

7 0
2 years ago
Pollination is the step that starts double fertilization. Each pollen grain contains two nuclei. One is the _______; the other i
stiv31 [10]

Explanation:

Hey there!

Your answer is option B.

Generally, in double fertilization one nuclei reacts with egg and form zygote and other reacts with polar nuclei. On this process, fruits and seed are found to be formed.

<em><u>Hope</u></em><em><u> </u></em><em><u>it</u></em><em><u> </u></em><em><u>helps</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em>

6 0
3 years ago
At what ph is enzyme A working at its maximum rate
crimeas [40]
Enzymes are also known as  Biological catalysts. An enzyme working at its maximum possible rate, where the substrate concentration is in excess is <span>V max.

</span><span>The reaction is slow because the molecules are moving slowly and they will not often collide with the active site of an enzyme, so the binding of an enzyme and substrate is rare.</span>
5 0
2 years ago
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