Match the words to the correct word.

JulijaS [17]

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.

7 0

3 years ago

In a bog or swamp, which trophic level usually has the highest biomass? A: tertiary consumer B:primary consumer C:producer D:sca

Andru [333]

Answer:

c. producer

Explanation:

6 0

2 years ago

The _____ sends out an electrical impulse that regulates the heartbeat.

olga nikolaevna [1]

Answer: The SA node

Answer choices are:

A. The AV node

B. The SA node

C. The purkinje fibers

D. The AV bundle

The SA node is the heart's natural pacemaker consisting of a cluster of cells located in the upper part of the wall of the right atrium. (the right upper chamber of the heart). The electrical impulses are produced and sent out from there to regulate heartbeat. This is also called the sinus code.

3 0

3 years ago

Read 2 more answers

Antibodies are proteins that have a lock-and-key recognition for their antigen established by the antigen-binding site on the an

Anna [14]

Question is incomplete. Complete Question is as follows.

Antibodies are proteins that have a lock-and-key recognition for their antigen established by the antigen-binding site on the antibody. Match the antibodies in the left column to the appropriate blanks in the sentences on the right.

neither anti-A nor anti-B

anti-O

anti-AB

anti-A

anti-A and anti-B

anti-B

1) People who have the A antigen on the surface of their red blood cells have __________antibodies in their plasma.

2) People who have the B antigen on the surface of their red blood cells have ___________ antibodies in their plasma.

3) People who have both A and B antigens on the surface of their red blood cells have ____________ antibodies in their plasma.

4) People who have neither A nor B antigens on the surface of their red blood cells have _________ antibodies in their plasma.

Answer:

1) People who have the A antigen on the surface of their red blood cells have anti-B antibodies in their plasma.

2) People who have the B antigen on the surface of their red blood cells have anti-A antibodies in their plasma.

3) People who have both A and B antigens on the surface of their red blood cells have neither anti-A nor anti B antibodies in their plasma.

4) People who have neither A nor B antigens on the surface of their red blood cells have both anti-A and anti-B antibodies in their plasma.

Explanation:

The antigen present on the surface of the RBC determines the blood group of the person.

The type of antigen present on the RBC determines that which antibody will be present in the blood. Always opposite antibody is present in the blood in order to prevent the reaction of antigen antibody and prevent agglutination.

For example For A antigen , anti A antibody will never be present, always anti-B antibody will be present because if anti-A antibody will be present, it will react with the A antigen resulting in the agglutination of the blood.

similarly all the other blood group antigens are varying with the antibodies.

4 0

3 years ago

Which of the following statements about minerals is false? A. Minerals reflect light in different ways. B. The color of a minera

UkoKoshka [18]

Answer: B. The color of a mineral's powder doesn't change.

C. The densities of many minerals are quite similar.

D. A mineral can break in only one way.

A mineral is a naturally occurring inorganic compound. It is a chemical compound that usually found in crystalline form. The color of the mineral's powder can change because of the oxidation or reduction of particles present in it. The density of many minerals cannot be same because all mineral particles exhibit different composition of atoms or molecules which are responsible for physical and chemical structure of minerals. Hence, minerals vary in density. A mineral can be broken down into many ways like fracture, cleavage and other methods.

3 0

3 years ago