BIOLOGY HIGH SCHOOL

Use the drop-down menus to complete the statements. A vertical column of elements in the periodic table is called a ____ . A horizontal row of elements in the periodic table is called a ____ . Atoms of elements in the same group have the same ____ . As you move from left to right on the periodic table, the atomic number ____ .

Answers

Answer 1
Answer:

Answer:

1) group

2) period

3) numbers of valence electrons

4) increases

Explanation:

When we move in a periodic table from top to bottom or vice versa along a vertical column , it is said that we are moving along a "group" in a periodic table.

Like wise when we move in a periodic table from left to right or right to left  in a horizontal row , it is said that we are moving along a "period" in a periodic table.

The classification of elements belonging to any specific group of periodic table is dependent on the total number of valence electron. All elements of with in a group have same number of valence electrons however, the orbitals may change.

The atomic number increases while moving from left to right as the number of orbitals in which the valence electron is found also increase in the same direction.

Answer 2
Answer:

A vertical column of elements in the periodic table is called a group

A horizontal row of elements in the periodic table is called a period

Atoms of elements in the same group have the same numbers of valence electrons

As you move from left to right on the periodic table, the atomic number increases

1) group

2) period

3) numbers of valence electrons

4) increases

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Which nucleic acid provides the master code for protein synthesis?

Answers

the actual synthesis is carried out by the ribosomes, small structures ...The code for ordering the amino acids of a protein is written as a sequence of ...or template for another kind of nucleicacid called RNA (ribonucleic acid)..
Hope this helps! :)

The answer is DNA. I just took the test!

Describe an environmental factor that could influence natural selection and decrease genetic diversity?

Answers

definitely climate change 

__________ are found in BOTH viruses AND in living single-celled organisms, such as protozoans and bacteria.

Answers

The answer for that question is DNA or RNA.
To be more specfic, DNA.

Which area of the central nervous system contains cerebrospinal fluid?a)Efferent tissue
b)Subarachnoid space
c)Dura mater
d)Grey matter

Answers

the CN system contains cerebrospinal fluid is the Efferent tissue

The area of Earth science that examines the physical and biological changes that have occurred in Earth’s past is called _____.astronomy
meteorology
physical geology
historical geology

Answers

The correct answer is option D

Historical geology can also be termed as the paleogeology. It deals with the study of the principles and techniques that was used during historic times. The discovery of many techniques such as radioactivity and several dating techniques helped in knowing the previous events that happened in the history of the earth.




D. historical geology

Which type of RNA carries a genetic code from DNA to the ribosome?A) mRNA
B) qRNA
C) rRNA
D) tRNA

Answers

Answer:

(A). mRNA.

Explanation:

During protein synthesis, information present in DNA as triplet codons gets transferred to mRNA molecule, by the process of transcription. The mRNA than gets transported to the cytosol, where it associates with ribosomes.

Ribosomes are known as protein factories of the cells as they provide platform for translation. During translation, information present in mRNA is used to translate polypeptide chain or protein as each codon codes for a specific amino acid.

Thus, the correct answer is option (A).

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