How did the result of the Hershey chase experiment strengthen Averys conclusions?

1 answer:

8 0

Hershey and Chase studied bacteriophages which are viruses that attack bacteria. In their experiment Hershey and Chase labeled the bacteriophages with radioactive isotopes to see where the virus attacks. They use phosphorus 32 and sulfur 35 because proteins contain almost no phosphors and DNA contains almost no sulfur. Nearly all of the radioactivity was found in phosphorus, meaning DNA holds genetic information, not protein.

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2 points<br> Individuals that are well adapted to their environment will survive and<br> produce

Novosadov [1.4K]

Answer:

Individuals that are well adapted to their environment will survive and reproduce

According to Charles Darwin's theory of evolution by natural selection, organisms that possess heritable traits that enable them to better adapt to their environment compared with other members of their species will be more likely to survive, reproduce, and pass more of their genes on to the next generation.

Explanation:

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3 years ago

Hi. Help needed .

guajiro [1.7K]

Answer:

Permeable membranes allow anything to pass through.

Impermeable membranes have a poor permeable rate or nothing can pass through.

Semipermeable membranes select or allow only certain substances to pass through.

Explanation:

Permeable Membranes:

Window screen - can pass water and air through 100%
Mesh - can pass water and air through 100%

Impermeable Membranes:

Clay - permeability rate is extremely low, and water cannot pass through
Ziplock bag - nothing can come in or out

Semipermeable Membranes:

Plant and Animal cell membranes (lipid bilayer) - only certain substances can pass through, like soluble vitamins
Cell Organelle Membranes - only certain substances can pass through the mitochondria, for example

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3 years ago

Where does most of the primary production occur in an ocean ecosystem?

KonstantinChe [14]

Answer:

B. First 200 feet

Explanation:

The first 200 feet deep zone of the ocean is termed as Photic Zone of the ocean because this zone receives sufficient quantities of light so that the phytoplanktons that are found in this are become enable for Photosynthesis. This zone is critically important because we know that phytoplanktons are the primary producers in oceans and the food web of the ocean starts with these phytoplanktons. This zone is considered to be the area of highest net primary productivity.