Blood Type identifies the presence or absence of particular proteins embedded in the cell It is quicker and less expensive than DNA profiling Produces blood evidence but can still link a suspect to a crime scene or exclude a suspect The presence or absence of cell-surface proteins determines a person’s blood type. True or false?

Answers

Answer 1
Answer:

True

Explanation:

Blood types are determined by the presence or absence of certain antigens – substances that can trigger an immune response if they are foreign to the body

Some antigens can trigger a patient's immune system to attack the transfused blood, safe blood transfusions depend on careful blood typing and cross-matching

There are four major blood groups determined by the presence or absence of two antigens: A and B on the surface of red blood cells

In addition to the A and B antigens, there is a protein called the Rh factor, which can be either present or absent creating the 8 most common blood types which are A+,A-.B+,B-O+,O-,AB+,AB-

Blood type is inherited and it is determined by the blood type of both father and mother

Blood type helps in DNA fingerprinting and forensic science and plays an important role in determining blood relations or to identify the suspect


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Write an example of an environmental stimulus

Answers

anything that can be seen, touched, tasted, smelled or heard. it might also involve the sense of proprioception, such as the movement of the arms and legs or the change in position of the body in relation to objects in the environment .

 ex - A car drives past with the window rolled down and the music blasting, Another would be , A duck splashes in a nearby pondd .

 - Hope this helps

In the case of the peppered moths in England, when Kettlewell set up cameras to document that more white or black moths were eaten by birds on clean or sooty trees, he was verifying which factor involved in evolution by natural selection?

Answers

OPTIONS:

a. The organisms vary in trait

b. The variation is inherited

c. More young are born than can survive

d. Some individuals are better adapted to the environment

Answer:

d. Some individuals are better adapted to the environment

Explanation:

Kettlewell’s biological experiment, which was conducted in England, was to study the evolutionary changes taking place in trees in relation to the appearance of dark-colored moth.  

It was observed that white moths were more common before the industrial revolution. After the industrial revolution, which changed the background of the environment of the moths due to pollution, the moths became easily seen and obvious to predatory birds.

It was discovered that peppered moths were selectively preyed on by birds depending on their body color, which serves as the most important factor that determines if moths can survive predation by blending with the background of their environment. This led to the evolving of moths of their color to blend with the background of their environment, which makes them hide from the birds that prey on them.

Kettlewell was trying to verify the factor in evolution by natural selection, which says, “some individuals are better adapted to the environment”.

solar radiation travels through the earth's atmosphere and warms the planet's surface. greenhouse gases like carbon dioxide in the earth's atmosphere reabsorb the heat and warm the planet. the amounts of greenhouse gases have been increasing over the past century, causing the earth's surface temperature to increase. this gradual temperature change is thought to have many negative environmental consequences. which of these might be a positive effect of the increase in carbon dioxide levels? a) rise in sea levels b) decrease in plant growth c) increase in plant growth d) increased melting of ice caps

Answers

c) increase in plant growth, because plants need carbon dioxide to survive

What happens to an enzyme's structure as it exceeds the typical human body temperatur?

Answers

Answer;

The enzyme structure begins to break downintermolecular bonds are broken

enzyme molecules gain kinetic energy.


Explanation;

Enzymes are proteins that play an important function in the body of catalyzing reactions in the body.

Enzymes work best at optimum temperature; low temperature lower than optimum temperatures deactivates them and higher temperature denatures them.

The shape of an enzyme depends on its temperature; when they get too warm they get loose, and at very low temperatures they get too tight. At optimum temperature or at the right temperature then they are just at the right shape and the chemical reactions they catalyze will be at optimal rate.

While studying enzyme kinetics in the lab, a scientist observed that the rate of a reaction involvingenzyme amylase increased as the concentration of starch increased. With further increase in starchconcentration, the amylase activity did not change. Why did this happen

Answers

  B. This is because there were still active sites available for the starch substrate to bind to when the concentration was initially increased (the reaction will have been first order with respect to the concentration of starch). However, at a certain concentration, all the active sites of the enzymes will be full so there will be no active sites available for the starch molecules to bind to (the reaction is now zero order with respect to the concentration of starch). i need brainliest answer to rank up plzzzz help

If you wanted to learn more about the genetic material of plant and animal cells, where would you look? A.
in the lysosomes

B.
in the nucleus

C.
inside the chloroplasts

D.
on the cell wall

Answers

I would look inside the nucleus (B) - that's where DNA is located. It's also called nuclean DNA because of this. The DNA is found in Chromosomes, which are kind of "packages" of  DNA.