This Is True
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Answer:
Red blood cells in blood type A-positive individuals have the A antigen, and generate antibodies against the B antigen (option B).
Explanation:
The basis of compatibility by blood group, according to the ABO system, is due to the presence of surface antigens A and B in the red blood cells. When a specific antigen is present, the body recognizes it as its own, while the other antigen will be recognized as foreign, and will induce antibody synthesis.
Blood types are determined by the presence, or absence, of these surface antigens A and B, generating antibodies against the antigens it does not possess, which can be summarized:
- <u>Blood type A</u><u> </u>has surface antigen A, but antibodies against B.
- <u>Blood type B</u> has surface antigen B, and antibodies against A
- <u>Blood type AB</u> has both A and B antigens, so it does not generate antibodies
.
- <u>Blood type O</u> has no antigens, but can produce antibodies to both antigens.
Individuals' blood type is a genetically inherited trait
Answer:
Continental <u>Polar</u>
Explanation:
Air masses are given a <u>two-part name</u> that describes the humidity and temperature characteristics of the region where they form. The first part of an air mass’ name describes its humidity. Air masses that form over the ocean, called maritime air masses, are more humid than those that form over land, called continental air masses. The second part of the name describes the temperature of the air mass, which depends on the latitude where it formed. Air masses that form near the equator or in the tropics (equatorial or tropical air masses) are warmer than air masses that form in polar areas or uin the Arctic (polar or arctic air masses).
The word that describes humidity (maritime or continental) is paired with the word that describes temperature (equatorial, tropical, polar or arctic). For example, if an air mass forms over a tropical ocean, it is called maritime tropical. If an air mass forms over land in the far north it is called continental polar.
A construction worker uses a hammer to drive a sharp nail into a concrete wall. What two simple machines is the construction worker using when he does this task-(D) a wedge and a lever
Explanation:
Simple machines are the tools an individual uses in his day to day life in order to make its work simpler.
For Example: Axles and wheel make it simple to carry a heavy object in a shopping cart.
<u>A hammer is a type of lever,</u>and is also a type of simple machines.A hammer can be defined as a heavy rigid bar moves around a fixed point ,that point is called fulcrum .
Wedges is also a form of simple machine and the inclined plane forms its foundation. A wedge can be referred to as the sharp edge of an inclined plane.They are used to level out a structure of an object
Thus we can say that A construction worker uses a hammer to drive a sharp nail into a concrete wall. What two simple machines is the construction worker using when he does this task-(D) a wedge and a lever
True
All somatic cells have same genes but the genes whose product is not needed are turned off. Some genes are expressed constitutively and some genes are turned off and on depending upon the requirement of proteins.
