Minerals form from magma in predictable patterns in a process known as Bowen's reaction series.
Bowen's reaction series is the general model for the formation and the crystallization sequence of magma as the cooling process occurs. Bowen's reaction series was the idea of Norman L. Bowen. The series explains that minerals crystallize differently at certain temperatures as they cool. It also states why specific types of minerals are found together and why others are almost never connected with one another.
B. Bureau of Economic Analysis
C. Federal Deposit Insurance Corporation
D. Federal Reserve System
E. Federal Election Commission
The correct answer is E. FEDERAL ELECTION COMMISION
B. marks transformation of ammonium (NH₄ plus) into nitrites (NO₂ minus) by bacteria.
C. marks synthesis of ammonium (NH₄ plus) by decomposers.
D. marks transformation of nitrogen (N₂) from the atmosphere to ammonium (NH₄ plus) by bacteria.
E. marks organisms that take part in transformation of nitrogen from the atmosphere (N₂) into ammonium (NH₄ plus) and are located in the root nodules.
Answer:
D. marks transformation of nitrogen (N₂) from the atmosphere to ammonium (NH₄ plus) by bacteria.
Explanation:
The nitrogen cycle is a biogeochemical cycle which involves transformation of atmoshperic nitrogen into many chemical forms including nitrite (NO2), nitrates (NO3) and ammonium (NH4).
The process of nitrogen cycle starts with the process of nitrogen fixation. In this process several nitrogen fixation bacteria such as cyno bacteria converts the atmospheric nitrogen into ammonium (NH4) in the soil. The resultant ammonium (NH4) can be directly used by plants or transform into nitrites or nitrates through nitrification process.
Hence, the correct option is D.
Answer:
The nitrogenous bases Adenine (A), pairs with uracil (U), while guanine (G) and cytosine (C) pair up.
Explanation:
Nucleotides are monomers that make up DNA and RNA- these are nucleic acids that function as storage, transport and messenger molecules for encoding proteins. Nucleotides contain a 5-carbon deoxyribose (with hydroxyl modifications) or ribose sugar (RNA), phosphate and one of four nitrogenous bases:
Adenine (A)
Guanine (G)
Cytosine (C)
Thymine (T).- DNA only
Uracil (U) found in RNA
Nucleotide monomers derive their names from their bases. Nucleic acid polymers form on a single strand through covalent bonding. This occurs between two nucleotides in an esterification reaction where a phosphodiester bond is formed.
Nitrogenous bases encourage hydrogen bonding, and resulting base pair formation. Adenine (A), pairs with uracil (U), while guanine (G) and cytosine (C) pair up.
b. a fish's tail fin.
c. a dog's front legs.
d. a mosquito's wings.
A bird's wings are homologous to a dog's front legs. Thus option C is correct.
Homologous structures shows the same structure, but may have a different function or same function.
Homologous structures have a common ancestor, this structure is an organ or bone that's in common between different animals that demonstrates an anatomical structure indicating that the animals share a common ancestor.
This is in contrast to analogous structures where two unrelated animals have structures with similar forms or functions due to convergent evolution.
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