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ale4655 [162]
3 years ago
14

When were the two major extinction periods that amphibians have survived?

Biology
1 answer:
faltersainse [42]3 years ago
8 0

in the 1950s and in 2007

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Explain why it is important to use only one independent variable at a time in a given investigation.
ikadub [295]
If you use more than one independent variable at a time, and will observe a change, you will not know which variable contributed to a changed result.
7 0
4 years ago
PLSS HELP how is gene knockout similar to gene sequencing?
alexdok [17]

Answer:

Gene knockout is a technique used to determine the function of a gene that has already been sequenced, which is achieved by analyzing the phenotype of the individual carrying the knockout mutation(s). Moreover, gene sequencing is a technique used to determine the sequence of a given gene, which allows to determine how gene variants (polymorphisms) may be associated with the phenotypes of the target trait.  

Explanation:

In genetics, gene knockout is a technique used to trigger mutations in a (already) sequenced gene in order to inactive its function and observe the resulting phenotype for a particular trait. This approach that starts with the inactivation of a given gene and ends with the phenotype is known as reverse-genetics. On the other hand, gene sequencing can be defined as the methodologies/techniques/tools used to determine the nucleotide base pair sequence of a particular gene. The gene knockout technique involves knowing a priori the gene sequence in order to obtain a gene knockout (gene KO). The combination of the information obtained from these techniques can be used to determine how variation (genetic variation) affects the expression of a phenotypic trait.

6 0
3 years ago
What process happens in the fluid filled space outside of the granum?
iris [78.8K]

Answer:

Calvin cycle is your answer.

Explanation:

hope it helps you.

3 0
3 years ago
Which kingdoms contain organisms that are multicellular?
Elza [17]

Answer:

Its B, and D

Explanation:

Bc thats what it told me the answer is after I guessed it wrong.

6 0
3 years ago
Read 2 more answers
Why do we add detergent to the strawberries? Group of answer choices To dissolve proteins that are found on the DNA molecule and
alukav5142 [94]

Answer:

The correct answer is - To dissolve the cell and nuclear membranes and release the DNA.

Explanation:

The major function of the detergent in DNA extraction is to dissolve the cell and cellular membranes. It can increase the membrane permeability by pulling apart lipids and proteins that are components of the nuclear and cellular membrane and lyse the cell, from which we want to extract the DNA.

Detergents cause pores in the cell membranes and once these membranes are completely lysed the DNA is released from the cell. It is similar to detergents removes fat (lipids) from dishes.

5 0
3 years ago
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