Select the correct answer The National Aeronautics and Space Administration (NASA) is a valuable source of information about Earth and space science. Each year, the US
Rovernment agency fields a number of questions and comments from people around the world. The bar graph shows the number of
information requests the agency received in 1909. Which statement is true about the information in the proph!
NASA History Information Requests, 1999
1600
1400
1200
1000
800
500
400
200
0
Months
Wilton Phone Requests mat Requests
On site Researchers
OA The number of monthly information requests by writing or phone newer exceeds 600
OB. Inals made up the lowest percentage of information requests in the month of May
OcEach month, the fewest number of information requests came from on to researchers
D Trends show that the total number of information requests decreased from Janary to December

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.

1. is geographic distribution

2 is increasing complexity

3 is transitional forms

1. amino acid refers to the fundamental building block of proteins, comprising of an amino group and a carboxyl group.

2. catalyst refers to any substance, which increases the rate of chemical reaction without being used up in the reaction.

3. a complex molecule containing he genetic code is dna or deoxyribonucleic acid.

4. an enzyme refers to a molecule of protein, which is unique in accelerating up a particular chemical reaction in the biological systems.

5. nucleic acid refers to an sequence of sugars, phosphates, and nitrogenous bases, for example, dna and rna.

6. a protein refers to a large, composite organic molecule comprising of a huge number of amino acids associated together with the of peptide bonds.

7. rna refers to a nucleic acid that takes part in the production of proteins.

8. substrate refers to a compound, which takes part in a chemical reaction, and is chemically modified by the reaction.