Why is a “DNA extraction” performed prior to any other form of testing? And, is it required? Question 2 options:

1)

Yes it is required; it is used to estimate the quality and quantity of a DNA sample

2)

No it is not required; It breaks the cell membranes and can degrade DNA

3)

Yes it is required; it is how we determine if the DNA profile is male or female

4)

Yes it is required; It breaks open the cells and releases DNA

5)

No it is not required in all cases; it is only used to remove a biological stain from clothing

Which ideas did your answer contain? check all that apply. no food for organisms no oxygen in the atmosphere no trees or flowering plants no products based on trees or plants (building materials, medicines, fuels, fibers) no fossil fuels

Astudent reads the following text in a science book: scientific evidence tells us that the cause of earths four seasons is the tilt of earth as it revolves around the sound the student is instructed to illustrate this information in a science book. how will the student illustrate winter in the northern hemisphere? a. earths northern hemisphere will tilt away from the sun. b. earths northern hemisphere will tilt toward the sun. c. earths orbit will be farther away than from the sun d. earths southern hemisphere will tilt away from the sun.

Answer ! in your opinion, what are the limiting factors that might affect the growth or diversity of our ecosystem? respond to this question in claim, evidence, reasoning format. 1. make your claim (i are the limiting factors that might affect the growth or diversity of our 2. follow the claim with 3 pieces of evidence. evidence may be taken from the reading, the videos, previous lessons, or googled answers. site sources, too. 3. use reasoning to explain why you chose your evidence.