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polet [3.4K]
3 years ago
13

A , B , C , D?? Help

Biology
2 answers:
IrinaK [193]3 years ago
6 0
Omg this question is so easy you know that the sun is a source of all energy in atsmosphere
Mashutka [201]3 years ago
3 0
I think it's a) sun
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What damaging byproduct resulted from organisms that began to use photosynthesis? 
Firlakuza [10]
Oxygen.

Oxygen was fatal when organisms started using photosynthesis, this event was known as the Great Oxidation Event.
4 0
1 year ago
A segment of a DNA molecule has the base sequence ATGAAC. Write a shorthand structure for this segment and for its complementary
Zanzabum

Answer: See attached picture.

Explanation:

DNA or deoxyribonucleic acid is the name for the molecule that contains the genetic information in all living things. This molecule consists of two strands that wind around each other to form a double helix structure.

The basic unit of nucleic acids are called nucleotides, which are organic molecules formed by the covalent bonding of a nucleoside (a pentose which is a type of sugar and a nitrogenous base) and a phosphate group. So each nucleotide is made up of a pentose sugar called deoxyribose, a nitrogenous base which can be adenine (A), thymine (T), cytosine (C) or guanine (G) and a phosphate group.

<u>What distinguishes one polynucleotide from another is the nitrogenous base</u>, and thus the sequence of DNA is specified by naming only the sequence of its bases. The sequential arrangement of these four bases along the chain is what encodes the genetic information, following the following criterion of complementarity: A-T and G-C. So the sequence of these bases along the chain is what encodes the instructions for forming proteins and RNA molecules. In living organisms, DNA occurs as a double strand of nucleotides, in which the two strands are linked together by connections called hydrogen bridges.

The chemical convention of naming the carbon atoms in the pentose nucleotide pentose numerically confers the names 5' end and 3' end ("five prime end" and "three prime end" respectively). The 5'-end designates the end of a DNA strand that coincides with the phosphate group of the fifth carbon of the respective terminal deoxyribose. A phosphate group attached to the 5'-end allows the ligation of two nucleotides; for example, the covalent bonding of the 5'-phosphate group to the 3'-hydroxyl group of another nucleotide, to form a phosphodiester bond.

3 0
3 years ago
Prokaryotes divide by binary fission, a form of asexual reproduction in which
evablogger [386]

Prokaryotes divide by binary fission, a form of asexual reproduction in which a cell divides into two cells with identical genetic information.

Explanation:

Binary fission and mitosis can be viewed as the same principle of  asexual reproduction to give out two identical cells. However, the major difference between the two is that binary fission is to prokaryotes and mitosis is to eukaryotes. Remember that prokaryotes do not have a true nucleus (they have a nucleoid) hence binary fission does not involve the dividing of the nucleus. Mitosis does.

Sexual reproduction is responsible for creating variation in offspring especially due to the process of meiosis in gamete development and subsequent fertilization of two gametes from different parents.

Learn More:

For more on binary fission check out;

brainly.com/question/13807858

brainly.com/question/917537

#LearnWithBrainly

6 0
3 years ago
Which of the following is the main disadvantage of laboratory experiments? a. elimination of causal factor is increased b. the l
lisov135 [29]

Answer:

b. the laboratory setting may not be a good representation of the real-world setting

Explanation:

The laboratory setting is different from the real world settings due to the real world settings having uncontrolled variables and conditions. Whereas the laboratory setting have controlled variables and conditions in which experiments could be performed under. The controlled or uncontrolled conditions could either influence the experiments positively or negatively.

3 0
3 years ago
Why does the percentage of water increase as it moves through the mouth,stomach and the beginning of small intestine
Rama09 [41]
Because there are other liquids in your body it passes through and it adds to the amount of water.
6 0
3 years ago
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