During the Precambrian, the development of the ozone layer helped A) primitive organisms on Earth's surface...
During the Precambrian, the development of the ozone layer helped
A) primitive organisms on Earth's surface to nucleate.
B) shield Earth's surface from harmful ultraviolet radiation.
C) promote the emergence of stromatolites.
D) promote the development of anaerobic organisms.
Homework Answers
Ans.
Since during pre cambrian era, no life existed on the earth, the ozone layer mainly helped for protecting the earth surface from hearmful UV rays which allowed reducing the temperature and radiation on the earth so that further animals and plants could evolve.
I hope the answer is clear to you, in case you have any query, please leave a comment, we will try our best to fix it. If you are satisfied with the answer, leave a thumbs up, your support is valuable. Thank You
Add Answer to:
During the Precambrian, the development of the ozone layer
helped
A) primitive organisms on Earth's surface...
Atmospheric ozone plays a UV-A (320-400 nm), UV-B (280-320 nm), and UV-C (200-280 nm)
Atmospheric ozone plays a UV-A (320-400 nm), UV-B (280-320 nm), and UV-C (200-280 nm). Unfortunately, human-caused pollution has eroded the ozone layer in the stratosphere, allowing a greater amount of ultraviolet radiation to reach the Earth's surface. The damaging effects of the radiation can be related to it's photon energy. Arrange the regions of UV radiation from overall lowest to highest photon energy. role in absorbing high-energy and damaging UV radiation, including Lowest Photon Energy Highest Photon Energy. Which region of...
5. Chlorine destroys the Earth's ozone layer by the following precess. CI + O3 → CIO...
5. Chlorine destroys the Earth's ozone layer by the following precess. CI + O3 → CIO +02 ClO + O → Cl +O2 The O atoms in the second step come from the decomposition of ozone by sunlight: A. What is the net reaction for these three steps? B. What is the role of the chlorine atoms? C. Are there any intermediates? If yes, identify
The ozone layer is Essential for life on earth Caused by the use of fossil fuels...
The ozone layer is Essential for life on earth Caused by the use of fossil fuels Located in the troposphere Natural filter for UV radiation Both A and D are correct Greenhouse gases Trap air in the troposphere and warm the Earth Are not related to human activities c. Absorb UV radiation coming from the sun Absorb heat released from Earth's surface, which later warms the Earth's surface 1. Sources that are scattered and diffuse and cannot be traced to...
Ozone (O3) is a very reactive gas with a short lifetime. Depending on the situation, it...
Ozone (O3) is a very reactive gas with a short lifetime. Depending on the situation, it can be beneficial or harmful. a. Ozone is used for oxidizing chemicals and inactivating pathogens during water treatment. If 2 mol of ozone is transferred to 100,000 L of water, what is the resulting mass concentration in mg/L? b. When generated as part of photochemical smog in urban areas, ground-level atmospheric ozone can cause breathing difficulty and aggravate respiratory problems. The United States Environmental...
6. Which of these things influenced the development of the theory of evolution by natural selection?...
6. Which of these things influenced the development of the theory of evolution by natural selection? O A. Charles Lyell wrote a book suggesting that most changes to the earth's surface topography are the result of catastrophic events. O B. Thomas Malthus suggested that population growth can be exponential, but resources are limited so all those that are born may not survive. © C. Charles Darwin collected specimens from around England while on his summer vacations from medical school. O...
FINAL Homework 1- Multiple choice questions (1 point each) Please answer all the following questions. Which...
FINAL Homework 1- Multiple choice questions (1 point each) Please answer all the following questions. Which one of the following is NOT considered as a natural resource? Energy from the sun Energy from the wind Energy from a battery a Energy from water 2. Aquifers are formed of water That infiltrates into the ground That evaporates into the air None of the above s. Which of the following are advantages of withdrawing groundwater? Sinkhole formation Overpumping Increased contamination from deeper...
Tethers are long dangling wires that use the velocity of a spacecraft through the Earth's magnetic...
Tethers are long dangling wires that use the velocity of a spacecraft through the Earth's magnetic field to generate electrical power. Alternatively, electrical currents pushed through the tether might be used to change the spacecraft velocity for either propulsion or for braking and reentry. Several 'space tether experiments have been flown to investigate the possible use if Faraday's law for power generation and/or propulsion. Examples are the 1996 joint US/Italy effort to deploy a 20 km tether from one of...
During the course of normal human development, the muscle myosin protein becomes expressed in muscle cells...
During the course of normal human development, the muscle myosin protein becomes expressed in muscle cells but not in non-muscle cells, such as liver cells. Based on this information and your knowledge about biology, select true or false for each of the following statements. a) T/F This expression pattern could result from the muscle myosin gene being present in muscle cells but not in liver cells. b) T/F This expression pattern could result from the regulatory sequence of the muscle...
RAP tests are closed book Start individual test only when instructed to begin Complete individual test...
RAP tests are closed book Start individual test only when instructed to begin Complete individual test using special answer response form Each question is worth 4 points. You should assign a total of 4 points on each line. If you are certain of the answer, then place the number 4 in that answer's slot. If you are somewhat uncertain about the correct answer, you may assign points to more than one answer. If you absolutely do not know the answer...
8 Does the figure at the right show homologous or analogous structures 9 At some point during the...
8 Does the figure at the right show homologous or analogous structures 9 At some point during their embryological development, all vertebrates have certain shared structures that appear early in embryonic stages of development. List these three shared structures development and differ in later which of the following statementis) are not true? (Circle the correct answer.) a. Evolution involves changes in gene frequency over time b. Microevolution involves changes in a population over time and occurs slowly c. Evolution involves...
5. Chlorine destroys the Earth's ozone layer by the following precess. CI + O3 → CIO +02 ClO + O → Cl +O2 The O atoms in the second step come from the decomposition of ozone by sunlight: A. What is the net reaction for these three steps? B. What is the role of the chlorine atoms? C. Are there any intermediates? If yes, identify
The ozone layer is Essential for life on earth Caused by the use of fossil fuels Located in the troposphere Natural filter for UV radiation Both A and D are correct Greenhouse gases Trap air in the troposphere and warm the Earth Are not related to human activities c. Absorb UV radiation coming from the sun Absorb heat released from Earth's surface, which later warms the Earth's surface 1. Sources that are scattered and diffuse and cannot be traced to...
6. Which of these things influenced the development of the theory of evolution by natural selection? O A. Charles Lyell wrote a book suggesting that most changes to the earth's surface topography are the result of catastrophic events. O B. Thomas Malthus suggested that population growth can be exponential, but resources are limited so all those that are born may not survive. © C. Charles Darwin collected specimens from around England while on his summer vacations from medical school. O...
FINAL Homework 1- Multiple choice questions (1 point each) Please answer all the following questions. Which one of the following is NOT considered as a natural resource? Energy from the sun Energy from the wind Energy from a battery a Energy from water 2. Aquifers are formed of water That infiltrates into the ground That evaporates into the air None of the above s. Which of the following are advantages of withdrawing groundwater? Sinkhole formation Overpumping Increased contamination from deeper...
Tethers are long dangling wires that use the velocity of a spacecraft through the Earth's magnetic field to generate electrical power. Alternatively, electrical currents pushed through the tether might be used to change the spacecraft velocity for either propulsion or for braking and reentry. Several 'space tether experiments have been flown to investigate the possible use if Faraday's law for power generation and/or propulsion. Examples are the 1996 joint US/Italy effort to deploy a 20 km tether from one of...
RAP tests are closed book Start individual test only when instructed to begin Complete individual test using special answer response form Each question is worth 4 points. You should assign a total of 4 points on each line. If you are certain of the answer, then place the number 4 in that answer's slot. If you are somewhat uncertain about the correct answer, you may assign points to more than one answer. If you absolutely do not know the answer...
8 Does the figure at the right show homologous or analogous structures 9 At some point during their embryological development, all vertebrates have certain shared structures that appear early in embryonic stages of development. List these three shared structures development and differ in later which of the following statementis) are not true? (Circle the correct answer.) a. Evolution involves changes in gene frequency over time b. Microevolution involves changes in a population over time and occurs slowly c. Evolution involves...
Most questions answered within 3 hours.
-
If 5.70 g of potassium react with water, how many grams of
hydrogen gas, H2, are...
asked 4 minutes ago -
How many moles of CO2 and H2O will be
produced by combustion analysis of 0.010 mol...
asked 2 minutes ago -
Tennis champion Maria Sharapova is capable of serving a tennis
ball at 126 mph.
b) What...
asked 10 minutes ago -
The electric potential V in the space between the plates of a
given vacuum tube is...
asked 20 minutes ago -
The Hydroboration-Oxidation of an Alkene to Yield 1-Octanol.
1-octene to 1-octanol using BH3-THF
What might be...
asked 25 minutes ago -
You draw and keep a single bill from a hat that contains a
$11, $55, $20...
asked 41 minutes ago -
Write a Java program that has the following methods:
findSum - a method that takes in...
asked 43 minutes ago -
A coffee cup calorimeter initially contains 135g of water at
22.0oC. Calcium chloride (21.0g) at the...
asked 46 minutes ago -
A patient is having a magnetic resonance imaging scan (an MRI)
and has neglected to remove...
asked 48 minutes ago -
A student takes a multiple-choice test that has 10 questions.
Each question has two choices. The...
asked 1 hour ago -
Willie Keeler has a lifetime batting average of 0.341. Assume
that Willie Keeler came to bat...
asked 1 hour ago -
Which of the following has the highest boiling point?
A) 0.5m NaCl
B) 0.5m C6H12O6
C)...
asked 1 hour ago