Answers
Answer:
Explanation:
1. Humans should worry about atmospheric changes as they can affect their health in the sense of their lungs and other important body organs being damaged.
2. Positive effect of humans on ozone layer:
The fact that humas have stopped using CFCs has helped the ozone layer as these had a bad effect on this layer protecting us.
Negative effect:
One thing causing a bad effect on the ozone layer is carbon dioxide and the fact that humans are using it very often it causes the ozone layer to decrease in size meaning that the ozone layer won't be capable to protect us from harmful gases.
4. Scientists think that we should try stop the amount of carbon dioxide from rising because the increase in carbon dioxide leads to the earth becoming warmer and this can lead to a drastic change in the climate.
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Related Questions
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A poison placed on the tips of darts by natives of the Amazon rainforest paralyzes prey such as small mammals . Which of the prey's cells are most likely affected by the poison ?
muscle cells
epithelial cells
red blood cells
white blood cells
Answers
The cells in the prey that are most likely affected by the poison present in the darts are the muscle cells.
What are muscle cells?The muscle cells are a specialized type of cell (one of the four tissues) that is able to contract in order to exert movement.
These cells (muscle cells) can be paralyzed by using different inhibitors of movement such as poisons.In conclusion, the cells in the prey that are most likely affected by the poison present in the darts are the muscle cells.
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Vascular plants transport nutrients through specialized structures called xylem and phloem. What is the purpose of the xylern?
A. They capture the Sun's energy to make sugar.
B. They move sugars and other nutrients from the leaves to the roots.
C. They take water and nutrients from the soil.
D.They move water and nutrients from the root through the plant.
Answers
Answer:D
Explanation:
How can you tell the sex between kittens that 6 months ?
Answers
Lift the kitten's tail. The opening just under the tail is the anus. Below the anus is the genital opening which is round in males and is a vertical slit in females. In kittens of similar size, the distance between the anus and the genital opening is greater in the male than the female.
Which two statements describe harmful effects of a tree dying and falling in a forest?
a. The space opened in the forest lets more light shine on plants that need it
b. Animals living in the tree's branches lose their shelter and nesting sites
c. The dead tree provides a new source of food for decomposers
d. Vines growing on the tree die if their stems and roots are damaged
Answers
The two statements that describe the harmful effects of a tree dying and falling in a forest are as follows:
Animals living in the tree's branches lose their shelter and nesting sites.Vines growing on the tree die if their stems and roots are damaged.Thus, the correct options are B and D.
Who consumes the dead plants fallen on the ground?The organisms that are known as decomposers consume the dead plants or trees which fall on the ground and convert the organic form of nutrients into inorganic ones.
The falling of trees in forests destructs the habitat of numerous birds and insects that are living on the trees. It is also responsible for the death of those plants whose stems require support in order to grow. Such plants are known as vines.
Therefore, the correct options for this question are B and D.
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When a stem cell differentiates and changes in size and shape, specific genes are being
expressed.
transcribed.
spliced.
copied.
Answers
When a stem cell differentiates and changes in size and shape, specific genes are being EXPRESSED.
Gene expression involves the flow of genetic information from genes (DNA) to RNA and proteins.
Differentiation involves first the transcription of genes to messenger RNAs (mRNAs) and second the translation of these mRNAs to proteins.
During gene transcription, a fragment of DNA called 'gene' is used as a template to create an mRNA in the cell nucleus.
Subsequently, this mRNA travels to the cytoplasm where it is then used as template to create a protein by the process of translation.
In conclusion, when a stem cell differentiates and changes in size and shape, specific genes are being EXPRESSED.
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Answer:
expressed
Explanation:
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What is one negative effect of human influence on cycles of matter?
decreased soil nitrogen due to the harvesting of crops
decreased amount of carbon in the atmosphere due to deforestation
increased global warming due to the use of alternative energy sources
increased amount of water that is available to freshwater ecosystems
Answers
Answer:
a) decreased soil nitrogen due to the harvesting of crops
Explanation:
I looked at my notes and made a 100 on the quiz.
Answer:
Is A
Explanation:
Which of these occurs just after the G2 stage of the cell cycle?
Answers
Answer:
S phase (DNA synthesis
Explanation:
Which immune cell is part of acquired immunity?
A. Macrophage
B. Eosinophil
C. Plasma cell
D. Neutrophil
Answers
Answer:
C. Plasma cell.
Explanation:
Acquired immunity is developed in the body following a previously encountered infection. The innate immunity by definition, always present in the body and is used to attack all general forms of infection.
The granulocyte cells are considered part of innate immunity and help mediate the immune response against foreign pathogens. These cells include basophils, neutrophils, eosinophils, mast cells, and macrophages (which are differentiated from monocytes).
The adaptive immune response involves the production of antibodies against specific target antigens. Plasma cells are an integral part of the adaptive response and secrete large volumes of antibodies in response to a secondary infection by a previously encountered pathogen. T-cells and B-cells are also part of the adaptive response.
how quickly can the nervous system receive information, process it, and respond to it?
Answers
Answer:
less than a second
Explanation:
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A scientific idea that has been more or less proven is called a what?
Scientific law
Scientific theory
Hypothesis
Answers
Scientific Theory. THeories cant be fully proven, but they can be assumed to be true by ruling out alternatives.
How does igneous rock form? A. From the cooling of magma or lava B. From the effect of heat or pressure on rock C. From a chemical reaction that changes rock D. From the pressing and cementing of small bits of rock
Answers
hope this helps :)
Which question asks for an opinion?
A. Is putting humans in space worth the risk?
B. How much rocket fuel is needed to place a 100 kg person in orbit
around Earth?
C. How much radiation are people in the International Space Station
exposed to each day?
D. What could cause a rocket to explode as it lifts off from Earth's
surface?
Answers
Answer:
A
Explanation:
Hello mh name is amber
Answer:
A
Explanation:
What change began the Neolithic age , about 8000 B.c.E
Answers
Answer:
Hunting and Gathering to Farming
Explanation:
Please answer fast
Which statement is true about BRCA1 and BRCA2 genes?
A.These genes were discovered in 1953.
B.Cancerous tumors often form on these genes.
C.People can be tested for mutations on these genes.
D.Mutations of these genes lead to diabetes.
Answers
Answer:
C.People can be tested for mutations on these genes
Explanation:
Acell with a 90% water concentration is placed in a beaker with an 85% water
concentration. What will happen to the cell over time?
Answers
Answer:
The cell will lose H2O and shrink
Explanation:
This is because the water will move out of the cell, also meaning that it is hypertonic.
What is the variable in a scientific experiment that is affected by another variable, called the independent variable?
A) independent variable
B) dependent variable
C) hypothesis
D) control group
Answers
How many years did it take for the population to double from 1 billion to 2 billion?
Answers
Answer:
About 33 years
Explanation:
List the locations in the drawing below in order from least pressure to greatest pressure
Answers
is the cell wall apart of any of theese
Prokaryotes
Animal Eukaryotes
Plante Eukaryotes
Answers
Answer:
The cell wall is part of plant eukaryotes and prokaryotes.
Jen and Ori are conducting an experiment to observe how sand and water absorb energy. They obtain two identical 1000-milliliter (mL) beakers, add 500 mL of distilled water to the first beaker, and 500 cubic centimeters (cm3) of sand to the second beaker. They place both beakers on a hot plate that is set to medium heat. Thermometers are placed in each beaker and held with clamps. Both beakers are heated for seven minutes and then removed from the hotplate and cooled for an additional fifteen minutes. Jen and Ori record the temperature of each beaker at one-minute intervals. How could Jen and Ori have increased the reliability of their experiment?
Answers
Answer:
I think that the answer should be B-repeated the experiment multiple times to see if they obtained the same results
Explanation:
This should be most reliable. Hope this helps!
A constant input of energy from the Sun is necessary to maintain any ecosystem. What contributes to the sustainability (balance) of an ecosystem?
A) Small Population sizes
B) Lack of adaptations
C) Polluted water source
D) Biodiversity (many different species of organisms)
Answers
Answer:
D) Biodiversity (many different species of organisms)
Explanation:
The ability to maintain the ecosystem and the surrounding nature is called sustainability. It is very important to for the sustainable development of the planet.
Biodiversity is the main contribution towards the sustainability of the ecosystem or maintaining a balance in the ecosystem. Biodiversity boosts the productivity of the ecosystem where each and every species, no matter however small they are, plays an important role in the ecosystem.
3. From problem 2, suppose another boy, Boy C pulls the heavy cabinet with 5 N
of force in the same direction with Boy A,
a. What will be the net force on the cabinet?
b. Will the cabinet move?
c. In what direction will the cabinet move?
Answers
Answer and Explanation:
As you can see the boys are pulling in the same direction. This means that we have an example of an unbalanced force, also called the resulting force, since the forces are not canceling out. This whole situation will have a result which is to create an unbalanced net force to move the object or keep it in repayment and that is what we will discover.
First, let's find out what force the two boys exerted. This is very simple, we only need to add the force exerted by the two. 5N + 5N = 10N
The cabinet will be able to move if the force exerted by the two boys (10N) manages to overcome the resistance and the force exerted by the cabinet itself. If they manage to overcome the resistance of the cabinet, the cabinet will move towards the force applied by the boys.
What is the weight of the ethyl alcohol that exactly fills a 200.0 mL container? The density of ethyl alcohol is 0.789 g/mL.
Answers
Answer:
What is the weight of the ethyl alcohol that exactly fills a 200.0 mL container? The density of ethyl alcohol is 0.789 g/mL. g = (0.789 g/mL) (200.0 mL) = 158 g
Explanation:
I looked it up on google. Im honestly not sure but i hope this helps.
Use the Biological Interactions Activity Instructions to help guide you through each step of this activity.
For this activity, you will be researching the Burmese python's impact on the Everglades National Park ecosystem in Southern Florida. These articles are an excellent place to start your research: Python and Impact of Invasive Alien Species.
After completing your research, you will analyze data on the current methods being implemented to control the python population and create a plan to solve the issue. You will then write a letter to the park ranger detailing your plan to control the python population in this ecosystem. Take a look at this student sample letter to see how your letter should be setup.
Answers
Burmese pythons are having a significant impact on the ecosystem and biodiversity in the Everglades and surrounding areas. As an invasive species, the python has no natural predator in Florida, making it an apex predator in the area. Therefore, the population of these snakes is not being naturally controlled.
Our innovative solution involves baiting the cages with pheromones, so that the snakes believe they are tracking the scent of the opposite sex. Since Burmese Pythons are usually solitary creatures, these traps will be especially useful during breeding season, to catch male pythons.
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What percentage of the earth is comprised of algal beds & coral reefs? What
percentage of all marine species is found there?
Answers
Less than 1% of the Earth is comprised of algal beds and coral reefs, and 25% of marine species are found there.
Coral reefs and algae beds are ecosystems that need special conditions to survive; even though they are in a small percentage, a wide range of marine species live there.
As reefs need special conditions such as:
Warm waterCalm water currentsShallow waterThey are present only in 1% of the earth's surface since these conditions are not found easily in different parts of the world.
Even though the coral reefs and algae beds cover a small Earth's percentage, they are an ecosystem that is necessary for 25% of marine life, which equals 1 million species. Not all the species live there permanently; some use the algae beds or reefs at some moment and then leave. However, without these places, those species would not survive.
In conclusion, 1% of the Earth comprises algae beds and coral reefs, and 25% of all marine species are there.
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What do cilia and flagella have in common?
Choose 1 answer:
(Choice A)
A
They help cells move.
(Choice B)
B
They regulate transport of materials into the cell.
(Choice C)
C
They give the cell its shape.
(Choice D)
D
They make proteins.
Answers
Answer:
A) they help cells move
Explanation:
Answer:
they help cells move
cilia and flagella are used for transport in members of kingdom bacteria and kingdom protoctista
Analyze the graph. Which is one change city planners should consider within the city? increasing parking meters increasing traffic signals increasing places to park bikes decreasing bike-repair shops
Answers
Answer: increasing places to park bikes
Explanation:
how do artificial reefs affect a marine ecosystem stability ?
Answers
Answer:An artificial reef affects a marine ecosystem yes
Explanation:they are too different ecosystem
What part of the body collects
disease cells?
Answers
Answer: The lymphatic system
Explanation: Hope you like the answer.
What is Meiosis and why is it important?
Answers
Meiosis is important because it ensures that all organisms produced via sexual reproduction contain the correct number of chromosomes. Meiosis also produces genetic variation by way of the process of recombination.
