True or false covalent bonds take place between 2 non metal elements

What technique did Hershey and Chase use in their experiment that led to the conclusion that DNA, not protein, was the genetic m

Olenka [21]

Answer:

They used radioactive labeling techniques to build two different types of phage.

Explanation:

In 1952, a set of experiments were carried out by American biochemists Alfred D. Hershey (1908-1997) and Martha Chase. They prepared two separate virus samples, one contained DNA labeled with a radioactive isotope and the other contained protein labeled with a different radioactive isotope. They grew the two types of viruses separately, infected bacteria with the two sets of phages and analyzed the bacteria for radioactivity. From the results obtained, Hershey and Chase concluded that the viral genetic material was DNA and not protein, reinforcing the observations previously made by Avery.

5 0

3 years ago

at which level of biological organization does muscle tissue and nervous tissues work together to carry out a specific function?

Monica [59]

Answer:

organ level

Explanation: because multiple types of tissues are working together.

6 0

2 years ago

Need help... Describe two problems a plant might encounter during reproduction

antiseptic1488 [7]

Answer:

During reproduction plant might experience absence of pollinators or presence of low temperature

Explanation:

Following can be the problems a plant might encounter during reproduction

Presence of Low temperature for long time: Due to presence of low temperature during the reproduction of plants for long period of time it will break its dormancy and freeze the blossom or developing fruit
Absence of pollinators: As e know pollinators play a vital role in reproduction. In the absence of Pollinators (i.e., beans) plants are not able to exchange the nectar carrying

4 0

3 years ago

How is the population that has experienced selection different from the original population

Viktor [21]

The new population that experienced natural selection is now better fit or more adapted to the environment than the old population

5 0

3 years ago

Oompah’s with type O blood receive a tax break. ophine oompah has type a blood, but he wants a wife that will give him children

vova2212 [387]

Answer:

He should request type O on his dating survey.

Opine's blood type must be AO to have a higher probability of producing O offsprings.

Explanation:

O blood type is recessive so, when it is paired with another blood type like B or A, these would be dominant, giving B and A blood, respectively.

O blood type results are possible thanks to OO genotypes.

If the man's blood type is A, to have a higher chance of producing OO offsprings, his blood should be AO. The other possibility is that he has AA blood, which will result in a low probability of OO offsprings.

As regards the mother, her blood type should be OO.

We can see this more clearly in Punnet Square.

║ A ║O

O║AO║OO

There is a 50% of probability of having O offsprings with AO and OO.

║ A ║A

O║AO║AO

O║AO║AO

With AA and OO, the probability is 0%

║ A ║O

A║AA║AO

O║AO║OO

With both parents having AO, blood the probability of having a OO offspring is 25%.

In conclusion, the higher chances of producing a OO offspring is if the parents are AO and OO.

3 0

3 years ago