which of these is an effect of an algal bloom?
A. The mercury contained in fish build up in animals that eat the fish
B. An increased growth in microorganisms result in oxygen depletion
C. Materials containing metal are toxic to organisms that live in them
D. Bacteria are introduced to break down hydrocarbons in an oil spill
Answers
the answer is B. an increased growth in microorganisms results in oxygen depletion
Related Questions
Were does all the energy start from ALL the organisms
Answers
Answer:
The sun
Explanation:
The Sun is the major source of energy for organisms and the ecosystems of which they are a part. Producers, such as plants and algae, use energy from sunlight to make food energy by combining carbon dioxide and water to form organic matter. This process begins the flow of energy through almost all food webs.
Answer:
from sun all the energy starts from All the organisms it is the fact that scientist had proven itMechanical energy can take on many forms, but these different forms can be categorized as either potential energy or energy of motion. The height an object is dropped from has an effect on the amount of energy in the object. Let’s conduct an experiment to see the effect.
:How does the height of an object affect the amount of mechanical energy it contains?
1:Variables What is the test variable?
Answers
The height of an object is crucial to the amount of energy something has because the higher up it is the most potential energy it has and kinetic energy it could have.
For example, if the height of a basketball was just a couple inches off the ground, it would not have a large amount of potential energy because because there is not much of a fall between the ball and the ground. However, if the ball was higher, there would be more potential energy because there is more room to fall.
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"What is the test variable?"
The test variable, or independent variable in this case would be the height, as the scientist is changing the height in order to get different results in the total mechanical energy, which would be the dependent variable.
Write one paragraph about Tilikum the Orca's life in SeaWorld.
Answers
During his life, Tilikum, the largest orca in captivity, weighed 12,500 pounds and measured over 22 feet in length. Tilikum was captured near Iceland in November of 1983, over 30 years ago. At only 2 years old, when he was approximately 13 feet long, he was torn away from his family and ocean home.
1. combination of DNA may survive environment changes.
is this an advantage or disadvantage of internal fertilization ?
is this an disadvantage of external fertilization ?
is this an advantage or disadvantage of asexual and sexual reproduction ?
is this an disadvantage of asexual reproduction ?
pls answer this. thank you very much
Answers
Answer:
C
Explanation:
What do you think? Do you think urbanization should be encouraged or discouraged? Explain why you feel the way you do. (I need a 125-word essay if someone could at least give me a little something to go off of and expand into my own words that would be greatly appreciated)
Answers
Feel free to copy and paste that :D
What is the ethical value of using a model organism, such as zebrafish for doing marine research on pathogens?
The organism can prevent diseases from being transmitted from one species to another, thereby reducing fish mortality.
The organism is immune to all diseases, so the effectiveness of new treatments can be studied over long periods of time.
The organism produces chemicals that can be extracted for use as antibiotics, so they are economically important.
The organism shares its physiology with humans, so testing of new drugs can be done without hurting people.
Answers
Answer: The Answer is C
Explanation: I took the test
Answer: C
Explanation:
I just learned that because I just fineshed the test and got 100% on it. I hope you get 100% too.
The ionosphere is classified by its _____.
A. properties of its gases
B. temperature profile (characteristics)
C. electrical properties
D. all of the above
Answers
Answer:
C. electrical properties
Explanation:
The ionosphere is classified by its. electrical properties. As you climb through the thermosphere, the temperature. increases. As you climb through the mesosphere, the temperature.
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THERE ARE MULTIPLE ANSWERS Which of the following systems use the cardiovascular system for the transport of materials? excretory system digestive system endocrine system respiratory system immune system
Answers
Excretory
Digestive
Which of the following transforms heat into electrical energy?
Static
Water
Wind
Fossil fuels
Answers
Answer:
Static (Option A)
Explanation:
You need a hot surface that has rotating potential amounts of electricity energy, this is why the sun is a great source. An example of this type of energy is a geothermal energy plant. It needs to be able to heat it as well as cool it down.
A commercial rancher that raises and sells cattle wants to expand her business by increasing the size of her herd from 1,000 cows to 1,500 cows. At present, she has enough land on her ranch to support 1,000 cows. If she moves forward with her plan to add more cows, what could be the result?
Answers
Answer: the answer is B
Explanation i answered it
Answer:
B) The land will be stripped of all of the vegetation, increasing erosion of the soil.
Explanation:
I would go with B b/c the other options are either too extreme or not accurate. More cows means they eat more grass or vegetation. Vegetation is crucial for holding down soil and if soil isn't held down, then erosion follows.
◕‿↼ Please Help Asap, Tysm!
→ Match these items ←
.send out
.controls heredity
.groups of tissues working together
.take in
_______________________________
.substance that builds tissues
.protein
.DNA
.absorption
.organ
Answers
a solar or lunar eclipse does not occur each month because _____.
A. the moon revolves slowly around the Earth
B. the sun, moon, and the Earth are not exactly aligned each month.
C. the moon is much smaller than the sun
Answers
Reason: The Earth and Moon have slightly not orbiting about their parent body’s equator.
What changes in adaptations would you most likely see over many generations if a species of plant that is adapted to a warm, dry climate was moved to a very wet climate?
A. The leaves would become spines.
B. The root system would become short.
C. The leaves would become small.
D. The seeds would become winged.
Answers
Please help me with this. It is for a science test. I will give you the brainliest
Answers
Answer:
15. Soil
Explanation:
Thats all I know sorry
Have a good day :)
Answer:
B AND C
Explanation:
Based on these images, what can you say about the tentacles of an octopus and the limbs of a lizard?
Answers
Answer: 4
Explanation:
Which type of soil contains the most amount of organic matter?
circle the correct answer.
Clay Loam sandy or silt
Answers
The soil which has more organic matter is clay. Compared to clay, sandy and slit soil has very little amount of organic matter.
What is clay?Clay is a type of finely grinded soil which contains hydrous aluminosilicates such as kaolin. Clay soil contains more organic matter and it can abstract large amount of water.
Clay develop a plasticity when it is wet but can be brittle and hard when dried. Clay is a type of ceramic material widely used in making potteries. Sandy soil is made of sand particles thus rich in inorganic minerals and contains very less organic matter.
Slit soil is a type of granular soil material which have a size in between that of clay and sandy soil. Slit soil is made by sediment materials carried by water and it can form fertile deposits on valleys. Therefore, the soil type which contains more organic matter is clay.
To find more on clay, refer here:
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Answer:
Explanation: its clay soil
Describe two things that would happen in an ecosystem if there were no unicellular organisms. Explain why something with only one cell can be considered to be an organism.
Answers
Unicellular organisms include bacteria, protists, and yeast. For example, a paramecium is a slipper-shaped, unicellular organism found in pond water. It takes in food from the water and digests it in organelles known as food vacuoles. Nutrients from the food travel through the cytoplasm to the surrounding organelles, helping to keep the cell, and thus the organism, functioning. Multicellular organisms are composed of more than one cell, with groups of cells differentiating to take on specialized functions. In humans, cells differentiate early in development to become nerve cells, skin cells, muscle cells, blood cells, and other types of cells. One can easily observe the differences in these cells under a microscope. Their structure is related to their function, meaning each type of cell takes on a particular form in order to best serve its purpose. Nerve cells have appendages called dendrites and axons that connect with other nerve cells to move muscles, send signals to glands, or register sensory stimuli. Outer skin cells form flattened stacks that protect the body from the environment. Muscle cells are slender fibers that bundle together for muscle contraction. The cells of multicellular organisms may also look different according to the organelles needed inside of the cell. For example, muscle cells have more mitochondria than most other cells so that they can readily produce energy for movement; cells of the pancreas need to produce many proteins and have more ribosomes and rough endoplasmic reticula to meet this demand. Although all cells have organelles in common, the number and types of organelles present reveal how the cell functions.
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If there were no unicellular organisms available in the ecosystem then there will be no atmospheric nitrogen fixation and no recycling of organic matter into plant usable products.
Unicellular organisms are small single celled organisms that can be observed through microscope but not with naked eye. The unicellular organisms are bacteria, fungi, virus, and protists. If no unicellular organisms are present in the ecosystem then there will be no nitrogen fixation by the soil bacteria like Nostoc, Cyanobacteria, and others. Since, plants cannot utilize atmospheric nitrogen directly so these bacteria convert the atmospheric nitrogen into plant usable form that is ammonia. When no soil bacteria present in the soil ecosystem then the plants will not be able to grow as ammonia is a chief ingredient of many biomolecules in plants. If there will be no unicellular organisms then there will not be any decomposition process of the organic matter and the waste of dead animals, plants, and other living beings will not recycle into plant usable form this will limit plant growth and will also affect the natural cleaning mechanism of ecosystem. Only one cell can be considered an organism if it shows characteristics of an organism like food intake, respiration, reproduction, and growth.Hence, if there were no unicellular organisms available in the ecosystem then there will be no atmospheric nitrogen fixation and no recycling of organic matter into plant usable products.
Learn more about ecosystem:
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man can inpact the corbon cycle in a negative way what conclusion would not negativelely inpact the carbon cycle
Answers
Answer:
Carbon is the chemical backbone of life on Earth. Carbon compounds regulate the Earth’s temperature, make up the food that sustains us, and provide energy that fuels our global economy.
(Which is the independent or dependent variable) You are walking directly away from your house. You are 555 kilometers away from your house when you start walking, so you can determine your distance from your house by adding 555 to the number have walked.
Answers
Answer: 666
Explanation:
Please help, 25 points. I’ve been stuck I. This for what feels like forever. What goes in these boxes
Answers
Down- Monomers
100 pts to whoever gets it RIGHT and brainlylist
Examine the diagram of a cell. Which organelle is marked with an X? Golgi body mitochondrion nucleus vacuole
Answers
Answer:
mitochondrion
Explanation
i did research
A student is studying a gray pine (conifer/gymnosperms), an apple tree and an avocado tree. After conducting research about them she discovers some similarities and differences between them. What are some of the differences and similarities she probably discovered? (Hints: think about how they reproduce)
Answers
Highly organized systems like living cells should have _____.
a. High energy
b. High entropy
c. Low entropy
d. Low energy
Answers
Write a message to Dr. Bayard Moraga explaining how the Museum of West Namibia’s exhibit should tell the story of the Mesosaurus. First, state your claim about how the Mesosaurus fossils got separated. Then, use evidence to support your claim. For each piece of evidence you use, explain how the evidence supports your claim.
Answers
Answer:
c
Explanation:
Claim 2: The South American Plate and the African Plate moved gradually. Based on evidence card D, these plates move apart from each other at the rate of 3.0 cm in one year which is slow.
How are isobars and isotherms alike?
Answers
Answer:
Isobars and isotherms are lines on weather maps which represent patterns of pressure and temperature, respectively. They show how temperature and pressure are changing over space and so help describe the large-scale weather patterns across a region in the map.
someone please help me with this !
i need i and ii done
Answers
Gene banks also preserve cells or organisms that host unusual gene variants — genes with special traits. Those genes might later prove useful when some disease epidemic strikes, when the climate changes or when other factors threaten the survival of plants or animals. Farmers could use the banked deposits — stored cells or tissues — to restore genetic diversity or to introduce traits from other breeds or varieties.
Some gene banks house millions or even billions of plant seeds. One example: the Svalbard Global Seed Vault. It’s located underground on a remote island north of Norway. The San Diego Institute for Conservation Research houses another project, called the Frozen Zoo. Its collection includes cells from thousands of birds, reptiles, mammals, amphibians and fish. The cells stored there might one day be used to help rebuild populations of endangered species.
The Smithsonian and SVF Biodiversity Preservation Project in the United States freezes semen and embryos from rare breeds of domestic animals. The U.S. Department of Agriculture’s Agricultural Research Service (ARS) has an even bigger program. It has almost a million samples of semen, blood and embryos from both common and rare breeds. Such collections serve “as a backup to the United States’ livestock industry,” explains Harvey Blackburn. He’s an animal geneticist. He also manages the National Animal Germplasm Preservation Program at an ARS lab in Fort Collins, Colo.
Gene banks use low temperatures to stop chemical and biological activity that might break down cells. Some banks freeze material in liquid nitrogen at –196° Celsius (-320.8° Fahrenheit). This freezing process replaces water in cells with another fluid, such as glycerol. That fluid minimizes the development of ice crystals. Such crystals could damage cell walls. Later, during thawing, biologists will remove the glycerol or some other fluid and return water to the cells.
Freezing and thawing cells has to be done quickly and carefully so that the material will still be viable after it has warmed back up. But some material requires extra special care.
The sperm from chickens and other poultry, for instance, do not survive the freezing and thawing cycle as well as does the sperm from cows and other mammals. Bird biology partially explains why, says Julie Long. A physiologist, she studies animal reproduction at an ARS lab in Beltsville, Md. Unlike female mammals, hens store sperm for several weeks after a single mating. Then they use those sperm over time to fertilize eggs. So thawed sperm must be very hardy to last such a long while in the female bird’s reproductive tract, she explains.
The shape of the frozen material also can affect how well it survives freezing. Bird sperm looks like a piece of string. That shape makes it more fragile than the sperm of most mammals, which contain a round head and slender tail. Ice crystals can more quickly damage DNA in a bird’s sperm.
But Long and other researchers are working to make the sperm of birds more resilient. “Bird sperm seems to respond better to a very fast freeze,” such as a 200 °C drop in one minute, notes Long. That’s more than three times as fast as the freeze rate necessary to preserve the sperm of mammals.
Answer each question with the correct term.
What cell does the male reproductive system produce?
What cell does the female reproductive system produce?
Answers
Explanation:
female - egg cell
male - sperm cell
Which of these diseases is not caused by improper disposal of sewage?
A. Cholera
B. Heart Attack
C. Jaundice
D. Typhoid
Answers
Observation
Use your senses to make an observation about your environment.
Questions
Create a hypothesis that can be tested in an experiment.
Remember, a hypothesis has a specific "if then" wording.It describes what will happen to the dependent variable when changes are made to the independent variable.For example, "If a plant is fertilized (independent variable), then it will grow faster (dependent variable)."
Design and plan an experiment.
Be sure to identify an independent variable, a dependent variable, and any controls.Remember, controls are factors which stay the same.In an experiment designed to test the previously stated hypothesis, one control would be to use the same kind of plant.Write a complete description of your experiment.Include a list of necessary materials.It is a good idea to follow a step-by-step procedure format.Think of everything you need to do, then write it down in the order it must be completed.Your description and procedure should be clear enough that another person could duplicate your experiment exactly.
Answers
Answer: E
Explanation:
Experiment Design:
Independent Variable: Intensity of light (Low, Medium, High)
Dependent Variable: Rate of photosynthesis (measured by oxygen production or CO2 consumption)
Control: Same kind of plant, constant temperature, constant CO2 concentration, constant water availability, and constant duration of light exposure.
Materials:
Three identical potted plants (of the same species)
Light source(s) with adjustable intensity
Light meter (lux meter) to measure light intensity
CO2 gas sensor or oxygen gas sensor
Timer or stopwatch
Water supply
Thermometer
Data recording sheets
Procedure:
Set up the three identical potted plants in a controlled environment with the same temperature and CO2 concentration.
Ensure that all plants receive the same amount of water.
Place the light source(s) at an equal distance from the plants.
Measure and record the initial light intensity using the lux meter.
Adjust the light intensity to low for the first plant, medium for the second plant, and high for the third plant.
Start the timer and expose the plants to light for a specified duration (e.g., 1 hour).
During the exposure period, measure and record the temperature, CO2 concentration (if possible), and light intensity at regular intervals.
After the exposure period, use the CO2 gas sensor or oxygen gas sensor to measure the change in CO2 concentration or oxygen production, respectively, in the surrounding air.
Record the data obtained from the sensors and calculate the rate of photosynthesis for each plant.
Repeat the experiment multiple times to ensure reliability and average the results.
Analyze the data collected and compare the rates of photosynthesis among the three different light intensities.
Draw conclusions based on the analysis and determine whether the hypothesis is supported or rejected.
By following this experimental design, you can test the hypothesis and determine the effect of light intensity on the rate of photosynthesis in plants. Remember to conduct the experiment in a controlled environment and gather sufficient data for accurate analysis.
Complete the sentences below. WILL MARK BRAINIEST!!! HELP PLEASE QUICK!
Creating dichotomous keys is useful because… if you were if ever have a snake in your house and did know know if it was safe to remove yourself you could give a description
Creating dichotomous keys involves… time, work and energy
Once a dichotomous key is developed, it helps scientists to.... Know what kind of animal they are dealing with or taking about
Answers
Answer:
Changes in species to a animal? rattle snacks and butterflies maybe birds
Explanation: