BIOLOGY HIGH SCHOOL

What is the most efficient procedure that scientists can use to obtain more recombinant DNA for a particular trait?

Answers

Answer 1
Answer: the most efficient procedure that scientist can use to obtain more recombinant dna for a particular trait is : Clone the recombinant dna in a biological vector. This method will give more assurance that they will get the traits that they  wanted form the subjects

hope this helps
Answer 2
Answer:

i think the answer is C. for e2020.

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Bleaching is caused by the addition of bleach containing fertilizers that enter marine systems through runoff. True False

Answers

The given statement is False

Bleach such as chlorine when mixed in fertilizers acts as a killing agent for plants .The bleach runoff is not affected by the fertilizers containing bleach as they do not kill the Aquatic flora. Marine bleaching is caused due to high temperature of water not because of the fertilizers. In marine bleaching the coral will expel algae when the temperature of water is high. These results in discoloration of corals making them white and they can survive in this condition. This proves that the bleaching inside the marine system is because of high temperature not because of runoff.
false because bleach is not used in fertlizers

Bones protect internal organs and help the body move. true or false?

Answers

True. This is because bones provide the structural support and act as levers- along with your muscles, you can move. They protect internal organs by creating a hard framework around them, in a way.
Hope that helped you.

Which of the following statements is correct? The earth is cooled by terrestrial radiation.
The earth's temperature is not affected by solar radiation.
The earth is heated by terrestrial radiation.
The earth's temperature is not affected by terrestrial radiation.

Answers

The answer would be C, "The earth is heated by terrestrial radiation."

Terrestrial radiation is a factor in what heats up the earth and it's a major factor in the study of global warming. 

The following answer is correct :

The earth is heated by terrestrial radiation.

Terrestrial radiation is a radiation emitted by naturally radioactive materials present on Earth including uranium, thorium etc. Solar radiation produced from the sun also heats up the environment but not directly. But rather it is heated by the terrestrial radiation that the planet itself emits.

Which characterization accurately describes both conduction and convection

Answers

Both conduction and convection need matter to transfer thermal energy.

Both only occur when currents are created by different densities.

Conduction involves collision of particles, while convection involves the movement of a liquid or gas.

or both only occur when currents are created by different densities.  

(I tried my best to find the answer, let me know if this was helpful, goodluck!)

Which of the following events happens first in the development of a new organism?a. A morula is formed.
b. A blastocyst implants into the uterine wall.
c. A sperm fertilizes an egg to form a zygote.
d. A zygote undergoes mitosis.

Answers

The answer is c. A sperm fertilizes an egg to form a zygote.

The first step in the development of a new organism is a sperm fusion with an egg and formation of a zygote. The zygote then undergoes mitotic divisions and as a result a morula forms. Morula is 16-cell mass that continues to divide and forms a blastocyst, which later implants into the uterine wall.

During normal cell division, a parent cell having four chromosomes in G1 will produce two daughter cells, each containing ______.

Answers

When a parent cell splits into two daughter cells, it is mitotic cell division (Mitosis). So if the parent has four chromosomes and the daughter cells are identical, they will also each have four chromosomes. For example, we humans have 46 chromosomes, 26 of them from the mom and the dad.
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