BIOLOGY HIGH SCHOOL

What would be the strand of complementary DNA produced by the strand of DNA shown below?ATG CGA

A.
TUC GCT

B.
ATG CGA

C.
UAC GCU

D.
TAC GCT

Answers

Answer 1
Answer:

The complementary DNA strand for the given DNA strand "ATG CGA" would be "TAC GCT". Therefore, option (D) is correct.

What is  complementary DNA?

When DNA is transcribed to mRNA, it follows the base-pairing rules where Adenine (A) pairs with Uracil (U), and Cytosine (C) pairs with Guanine (G).

However, in the question, we are asked about the complementary DNA strand, where Adenine (A) pairs with Thymine (T), and Cytosine (C) pairs with Guanine (G). Therefore, to find the complementary DNA strand, we need to replace each base with its complementary base.

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Answer 2
Answer: Should be TAC - GCT

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Darwin wrote many of the premises of 'The Theory of Evolution by Natural Selection' by noting differences in the _________ of closely related ______________, while studying in the Galapagos Islands.

Answers

He noted the beaks of the finches in the Galapagos Islands.

Answer:

the answer is B beaks, finches.

Explanation:

Considering that we are all made up of the same 4 nucleotides in our DNA, the same 4 nucleotides in our RNA, and the same 20 amino acids in our proteins, why are we so different from each other?

Answers

The order that the nucleotide are arranged in form different 'codes' to create traits.RNA in human is used for transporting,and making the amino acids proteins.

The order of amino acid proteins also changes the polypeptide formed, changes more traits and characteristics.

Nucleotide in DNA contains four different nitrogenous bases-

  • Thymine
  • Cytosine
  • Adenine
  • Guanine

Pyrimidines: Cytosine and thymine each have a single six-member ring.

Purines:Guanine and adenine each have a double ring made up of a five-atom ring attached by one side to a six atom ring.

Therefore,they are different, due to nucleotide of our DNA contains four different nitrogenous bases.

To know more about the  DNA and RNA nucleotide follow the link:

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The order that the nucleotides are arranged in form different "codes" to create traits. RNA in humans is used for transporting, and making the amino acid proteins. The order of amino acid proteins also changes the polypeptide formed, and changes more traits, and characteristics. Basically, it's like reading a book. Each book is made up of the same 26 letters, but their all arranged in different orders. You can find the some of the same words in another book, but no two books are exactly alike. All the letters and words are arranged in different ways, even though other books have the same letters and words. 

The species name of the African elephant is Loxodonta africana. In the species name, africana is the __________. a. family b. genus c. specific epithet d. domain

Answers

In the species name Loxodonta africana, "africana" is the specific epithet. Therefore, option (C) is correct.

What is a specific epithet?

The genusname and the specific epithet are the two components that make up the binomial nomenclature that is utilized for naming species. Combined, these make up the name of the species. In this particular instance, the name of the genus is Loxodonta, and the specific epithet is africana.

It is possible to differentiate between distinct species that belong to the same genus by making use of the particular epithet. On the other hand, the name of the genus is something that all of the species that belong to that genus share.

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The scientific name for animals starts with the Kingdom then goes down the list: phylum, class, order, family, genus then the specific epithet, therefore the africana in Loxodonta africanawould be C)specific epithet.(Note: Scientific names should always be italicized, expect for when the family is introduced. For example, the family for the African Elephant would be Elephantidae, starting always with a capital letter as the genus should be as well but not italicized.)

Which of the following planets has the lowest average density?1) Venus
2) Mercury
3) Earth
4) Mars

Please explain

Answers

The planet that has the lowest average density is Mars. The correct option is 4.

What is average density?

The entire mass of a region divided by the total volume of that region yields the mean or average density.

By multiplying each compound's density by its volume and then dividing the result by the sum of all the volumes, one can determine the mixture's average density.

The average density of different planets is:

Venus; 5.2

Mercury; 5.4

Earth; 5.5

Mars; 3.9

So, the lowest density out of these planets is Mars. Density is something's concentration. If the density is low, the weight of the object will be low. When placed in water, an object will float if its density is lower than that of the water, whereas it will sink if its density is higher.

Therefore, the correct option is 4) Mars.

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Mars because it has low levels of gravity and if given the oppurtunity could float on water.

A scientist has been tracking and studying a population of deer in Yellowstone National Park. He surveys the population every six months. Usually, the population is thriving and has a gene pool with a wide variety of traits. But during one six-month period, an event occurred that affected the population, and when the scientist returned, the amount of genetic variation had decreased significantly. Which of the following is most likely the event that occurred to change the population? Yellowstone National Park expanded its borders.

Answers

Hi,

I think that you're missing some options, but here they are (let me know if I'm right!

-A population of wolves was introduced
-The amount of disease in the deer population decreased
-More grass was planted

Now, if the gene diversity decreased, it means that a lot of deer died. This could happen because wolves were introduced -this is the correct answer, and the wolves ate some deer.

It may be due to the fact that there was an event that eliminated many of the individuals in species.

What is genetic variation?

The term genetic variation refers to the occurence of organisms in a specie that are composed of different genotypes.

If the genetic variation in a population at the yellowstone park is decreased it may be due to the fact that there was an event that eliminated many of the individuals in species.

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Which of the following is an abiotic factor in an ecosystem?

Answers

your answer would be sunlight

hope i was helpful. XD
what are the choice answers
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