Answer:
Humans are moving more Carbon into the atmosphere with things like fossil fuels. We are also cutting down trees and other plants that actually take carbon away from our atmosphere through photosynthesis and adding oxygen. This is causing the carbon to get stuck in the atmosphere and contaminating our air.
Explanation:
Answer:
The most significant experiment performed to date on the formation of organic molecules remains that of Miller and Urey in 1952 when they sought to test the hypothesis of Oparin and Haldane that the organic building blocks of life emerged from a reducing atmosphere (Miller, 1953). Miller filled a flask with the four gaseous elements of the reductive atmosphere: methane, ammonia, hydrogen and water. He then passed electrical discharges through them to simulate lightning. After 125 h of the experiment, using the equipment available to him at the time, Miller identified several alpha amino acids contained within the residues.
Answer:
The Growth rate constant (k) will be = 
per minute or 0.308 per hour.
Explanation:
Given,
N₀ = 4596 cells / ml
N = 206104972 cells / ml
t = 15 hours
We know that,
n = 
Where,
n = no. of generation during the period of exponential growth.
∴ n =
= 
= 3.3 × 44844.42
∴ n = 15.350
We know that,
g = 
Where,
g = generation time
t = duration of exponential growth
∴ g = or ∴ g =
= 
= 15 / 15.350
= 900 / 15.350 ∴ g = 0.977 hours
∴ g = 58.63 minutes
We know that,
k = 
Where, k = specific growth rate
∴ k = or ∴ k =
= 0.301 / 58.63 = 0.301 / 0.977
∴ k = per minutes ∴ k = 0.308 per hour
Answer:
The DNA is packed in such a way that it fits into the nucleus.
Explanation:
The DNA of each chromosome undergoes coiling, compaction and again coiling to fit into the nucleus.
At the primary level, the DNA is packed around a group of proteins called the histones.
The condensed structure that is formed by the process of coiling is called chromatin. The DNA remains in this shape throughout until it has to carry out replication.
The coiling is only unwrapped at the time of replication of the DNA.
