Explanation:
Standard volume=22.4 L
It means that 1 mole of any atom, molecule or ion occupies 22.4 L of volume at STP (Standard Temperature and Pressure)
1 mole of CO2 = 22.4 L
Given volume = 224 mL = .224 L ( 1 L = 1000 mL)
No. of moles in .224 L = Given volume/Standard volume
= .224/22.4 = 0.01 mole
The development of seeds are considered to one of the most important in the evolution of land plants especially the spore-bearing vascular plants. The seeds will serve as the alternative means of dispersal for reproduction purposes especially in areas where there is no water.
Mercury:
-Smallest planet in the solar system
- Atmosphere composed of hydrogen, sodium, and oxygen
- Orbital period if about 88 Earth days
Jupiter:
- Largest planet in the solar system
- Atmosphere composed of hydrogen and helium
- Orbital period of 11.86 Earth years
Answer:
4
Explanation:
Codons describe the triplet sequence of bases present in an mRNA that code for proteins. They do this by specifying specific amino acids.
To answer this question, we need to know the genetic code. This can be found in various formats (usually tables) online or in textbooks. An example is attached.
Threonine is an amino acid with the three letter code Thr, and the one letter code T.
As you can see in the table, 4 codons (ACU, ACC, ACA, ACG) code for threonine
Answer:
The correct option is that (Too many greenhouse gases in the atmosphere may block heat from escaping into space and trap too much heat next to the Earth's surface causing global warming).
Explanation:
Increased human activities has caused the continuous release of many toxic and harmful substances into the environment. This has caused varying degrees of environmental pollution.
The increased demand of fossil fuels for generation of energy in industries, deforestation and even farming has lead to increase in the release of greenhouse gases to the atmosphere. Example of greenhouse gases include:
--> carbondioxide
--> methane
--> chlorofluorocarbons
--> nitrous oxide.
These are called greenhouse gases as they have the ability to absorb hear energy emitted from earth surface and reflecting it back to the earth surface. The trapping of this heat increases the earth's atmospheric temperature leading to a weather condition called GLOBAL WARMING. The effect of this weather change includes:
--> higher sea levels,
--> Extreme or severe weather such as storm, floods, drought and heat waves,
--> acidic ocean
-->higher death rates.
