Which of the following is a biotic factor?
A. sunlight
B. rocks
C. water
D. yeast
Answer:
yeast
Explanation:
biotic is living
Which statement best describes why the population growth rate slows as population size approaches carrying capacity?
O reproduction increases
O predation rates decrease
evolution of traits decreases
competition for resources increases
Answer:
competition for resources increases
Explanation:
When an ecosystem reaches its carrying capacity, competition for scarce resources become more intense.
The result of this is that species will either begin to die, or migrate away from the ecosystem leading to a decrease in population growth
Based on the description of DNA, given in the Do Now, what could be the nucleotide composition of a DNA double helix? 90 points 20% adenine, 20% guanine, 30% thymine, 30% cytosine 60% adenine, 20% thymine, 10% guanine, 10% cytosine 20% adenine, 20% thymine, 30% guanine, 30% cytosine 60% adenine, 20% guanine, 10% thymine, 10% cytosine
Answer:
20% adenine, 20% thymine, 30% guanine, 30% cytosine
Explanation:
Edwin Chargaff stated in his rule that, in a DNA molecule, the amount of purine bases (Adenine and Guanine) should equate the amount of pyrimidine bases (Cytosine and Thymine). Mathematically, this means that;
A + G + C + T = 100%
Where;
% Adenine base = % Thymine base
% Guanine base = % Cytosine base
Hence, according to this question, the DNA molecule described will contain
20% adenine = 20% thymine,
30% guanine = 30% cytosine
20% A + 20% T + 30% G + 30% C = 100%
How many cells does one gram of yeast contain?
Answer:
20 billion cells
Explanation:
It is based on the assumption that there are 20 billion viable yeast cells per gram of dried yeast. While there are 20 billion cells, you'll find that many manufacturers will state other numbers on their products.
The number of cells that one gram of yeast contain is 12 billion cells.
What are yeast cells?Yeasts are found in soils and on plant surfaces all over the world, and they are particularly prevalent in sugary environments like flower nectar and fruits.
It is predicated on the idea that each gram of dry yeast contains 12 billion live yeast cells. Despite the fact that there are 12 billion cells, several manufacturers will list different quantities on their products.
As opposed to mushrooms, yeast is a fungus that develops as a single cell, according to Laura Rusche, an associate professor of biological sciences. Although there is just one cell in every yeast organism, these cells form multicellular colonies.
Therefore, Yeast has 12 billion cells per gram.
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HWLPPPPPPPAHWOWAJAOAKSNSKWKEKEOEL
Answer:
glycolose
Explanation:
One way that cells maintain homeostasis is by controlling the movement of substances across the cell membrane.
Answer:
True
Explanation:
One way that a cell maintains homeostasis is by controlling the movement of substances across the cell membrane. The lipid bilayer is selectively permeable to small, nonpolar substances. Proteins in the cell membrane include cell-surface markers, receptor proteins, enzymes, and transport proteins.
what causes the greenhouse effect
Answer:
What causes the greenhouse effect?
Explanation:
The greenhouse effect is caused by the atmospheric accumulation of gases such as carbon dioxide and methane, which contain some of the heat emitted from Earth's surface. This radiation, unlike viable light, tendsbto is absorbed by the greenhouse gases in the atmosphere, raising its temperature.
Hope that helped♡
Answer:
earth radiates mostly infrared light
Explanation:
A student designed an experiment to determine if air temperature had an effect on the rate of photosynthesis in corn plants. A constant in this experiment is the
A.Air temperature at which the corn plants were grown
B.Amount of carbon dioxide used by the corn plants
C.Volume of oxygen produced by the corn plants
D.Number of corn plants used
Answer: A) the air temp at which the corn plants are grown
Explanation:
The independent variable is the one that changes based on what problem/ question the experimenter is trying to solve. The student is trying to see if the air temp has an affect on the rate of photosynthesis so they whorls use various temps and measure the rate
The constant in this experiment is the number of corn plants used.
WHAT IS A CONSTANT VARIABLE:
In an experiment, a constant or control variable is a variable that is kept the same for all groups of the experiment. The independent variable is tested to bring about a change in a dependent variable in an experiment. However, every other variable of the experiment must be kept constant. These variables are called CONSTANT.In this question, the independent variable is the air temperature while the dependent variable is the rate of photosynthesis.A constant in this experiment is the number of corn plants used. The number used must be the same for all groups.
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PLS HELP FAST!!!! You have a natural-gas (methane, CH4) stove. When you ignite a natural-gas stove, the methane reacts with oxygen (O2) to produce carbon dioxide and water vapor. Write a balanced equation for this reaction, and be sure to show your work. (6 points)
Answer:
Methane (CH4) ( C H 4 ) burns in oxygen to produce carbon dioxide and water vapor. The balanced equation is: CH4+2O2→CO2+2H2O C H 4 + 2 O 2 → C O 2 + 2 H 2 O .
Explanation:
The balanced equation for the reaction of methane with oxygen is CH₄ + 2O₂→CO₂ + 2H₂O.
What is methane?Methane is a gas and a chemical compound with formula CH₄. It is a colorless and odorless gas and very flammable. It is made up of carbon and hydrogen. Methane comes under greenhouse gas.
As it is highly reactive, it reacts with the gases present in the environment. Here, methane is reacting with oxygen. When one molecule of methane reacts with two molecules of oxygen, it produces carbon dioxide and two molecules of water.
The reaction happens in the presence of heat and high temperature. The balanced reaction is written when the same number of moles are present on both sides of the reaction.
CH₄ + 2O₂ → CO₂ + 2H₂O.
Thus, the balanced equation for the reaction CH₄ + 2O₂→CO₂ + 2H₂O CH₄ + 2O₂ → CO₂ + 2H₂O.
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the prefix ad placed in front of a word means what
Answer:
a prefix occurring in loanwords from Latin, where it meant “toward” and indicated direction, tendency, or addition: adjoin.
A bar graph is created one
A- The independent variable is a category or description
B- The dependent variable is a category or description
C- The independent variable is a number number
D- The dependent variable is a number number
Answer:
B
Explanation:
The dependent variable is a category or description
Which statement best describe the way thay an adesine phiphosphate molecule become an adenosi trphosphate molecule in the human body?
A. Protein cause phosphate molecule to bind to sugar and form ATP.
B. Food energy is used to attach a phosphate molecule to an ADP molecule.
C. Lonized Oxygen in cells causes sugars and phosphate molecule to form ATP.
D. Water breaks down ADP molecules which form into ATP molecules over time.
Answer:
B. Food energy is used to attach a phosphate molecule to an ADP molecule
Explanation:
Hope this helps!
MANE WHAT DIS IS IM LOST !!
Answer:
I'm not sure exactly what your supposed to do but a,b and c are all correct but d is false.
The earth rotates on its axis in a counterclockwise direction once every 24 hours, deflecting anything traveling long distances on or above the surface. This is known a the Coriolis Effect. What impact could the Coriolis Effect have on weather patterns
Answer:
in the Southern Hemisphere, currents are deflected to the left. As a result, storm systems seem to rotate clockwise. Outside storm systems, the impact of the Coriolis effect helps define regular wind patterns around the globe. As warm air rises near the Equator, for instance, it flows toward the poles.
Explanation:
Answer:
Chance of a cyclone
Explanation:
Please help(due today)
Answer:
I would say A
Explanation:
it makes the most sense to me sorry if im wrong.
Can humans be considered carbon sinks? If so, for how long? What living organisms are better long-term sinks than humans?
Answer:
Carbon sinks can be natural or man-made. They absorb more carbon than they release, whereas carbon source is anything that releases more carbon than they absorb. ... Together Earth's land and Ocean sinks absorb half of the carbon dioxide emissions.
Explanation:
Humans can be considered carbon sinks - yes, for a lifetime.
living organisms are better long-term sinks than humans - plants or trees.
Carbon sinkanything that absorbs more carbon from the atmosphere than it releasesit is the opposite of a carbon source as a carbon source is anything that releases more carbon than it absorbsHumans release carbon mainly by respiration, however, absorbs very less amount as foodPlants grab carbon dioxide from the atmosphere to use in photosynthesis and only some of this carbon is released to the soil when plants die and decomposeLearn more:
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Why are there fewer tuskless elephants born after the war (ages 10-20 years old)?
Elephant tusks are either present or absent due to genetics, specifically the existence of key genes that regulate tusk growth. Environmental elements, however, can also affect the proportion of tuskless elephants in a population.
Elephants are frequently hunted down during conflicts or wars for their ivory tusks, which are highly sought-after on the illicit market. Over time, the population of elephants with tusks may decline as a result of this selective hunting of those with them.
The age range of 10 to 20 years old is essential because it coincides with the period of time when elephants usually begin to grow their tusks. Around the age of 6 to 8 years, young elephants may start developing their tusks, and by the time they are 10 to 20 years old, their tusks should typically be more noticeable and developed.
It is possible that many young elephants with developing tusks will be killed if a conflict or a period of rampant poaching takes place during this crucial time, which will reduce the number of tusked elephants in the population. After such a conflict or a period of heavy poaching, there can be a larger percentage of tuskless elephants between the ages of 10 and 20.
This theory makes the assumption that there was greater poaching or selective hunting occurring during the conflict, which would have a disproportionately negative effect on elephants with tusks. In order to provide a more comprehensive knowledge of the issue, additional examination of local conditions and data would be required. The individual situations and variables affecting elephant populations can differ.
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Blood isn't the only natural system that uses acid/base buffers. Limestone is made of calcium carbonate. How would you expect the pH of a lake with limestone bedrock to compare to other lakes after several years of acid rain?
Please HELP!!!!!!!
Refer to the family pedigree shown here. In generation I, one parent is affected by the gene mutation and one parent isn't. In generation II, all three children are affected by the gene mutation. What can you conclude about this gene mutation?
Answer:
What can be concluded about this genetic mutation is that it is inherited as a dominant trait.
Explanation:
In the case that one of the parents has a mutation whose inheritance pattern is dominant —which is rare— all the descendants will have the same mutation, since this gene will necessarily be expressed.
A dominant allele is one whose presence produces the phenotypic expression of the characteristic it determines. When the mutation is dominant, it will always be expressed in the descendants.
Hungtinton's disease and achondroplasia are examples of mutations with an autosomal dominant inheritance pattern.
How does the destruction of tropical rainforests relate to the greenhouse effect
Write a sentence describing Abraham Lincoln.
Answer:
Abraham Lincoln was a good president promoting the abolishment od=f slavery, sadly he was assassinated during an opera.
Explanation:
Basic info on the president :)
Which of the following is NOT a characteristic of life?
A must have a method of excreting waste
B Must be able to grow
C Must maintain boundaries between inside and outside
D Must use oxygen to survive
Answer:
B
Explanation:
You can't tell anybody to grow because you are amazing
whatever size or way you are so B
With statement best describes the anther in a flowering plant? A. It is the colored part of the flower that attracts pollinaters. B. It is the part of the stem that supports the weight of the plant. C. It is the part of the stamen that contains the pollen. C. It is the part of the flower that contains the eggs.
Answer: C. It is the part of the stamen that contains the pollen
Explanation:
Anthers are the pollen containing units in a flower that can be found in the stamens of such flowers. It should be noted that typically, anthers consist of two parts which are referred to as the thecae and each one of the theca is made up of two microsporangia.
Therefore, from the explanation above, we can infer that the another is the part of the stamen that contains the pollen.
what is genetic ? can you plz give the definitoin
Answer:
Genetics is someone that is related to someone else by genes or heredity
Explanation
Lymph eventually ends up in the circulatory system.
A.
True
B.
False
Answer:
True
Explanation:
2. What are 3 examples of lipids and what functions do they serve in organisms' bodies?
Answer:
Examples of lipids include fats, oils, waxes, certain vitamins
The functions of lipids include storing energy, signaling, and acting as structural components of cell membranes.
QUICK PLEASE HELP
Why is the use of the inquiry process a practical way to approach science?
Explain.
Answer:
The inquiry process is a practical way to approach science because the inquiry process begins by asking questions and moving on from there. ... Therefore, the inquiry method is connected because to inquire on a subject requires raising questions which is an essential step in scientific discovery.
Explanation:
Pick out the answer. But that's the long way :)
I keep rolling my ankle and have pulled a muscle in the back of my leg, running Cross Country. WHAT SHOULD I DO? Can you help PLEASE?
Answer:
you should talk to the nearest adult asap
Answer:
Ice,Heat, or massoge
Explanation:
Try icing it if that doesnt help try putting something warm on it that should relax the muscle
try to massoging it as well
A blank is an example of a prokaryotic cell
Answer:
Bacteria
Explanation:
Answer:
Bacteria
Explanation:
Bacteria is the most common prokaryotic cell. Hope this helps!
Scenario: A horticulturist (plant scientist) complains to the city that a nearby residence is ruining his flowers
because of the detergent being used to wash their cars. The soap ruins into a stream that goes near his flower beds.
As an inquiring scientist, you want to find out whether soap can affect flower growth.
1. (pts) What is the scientific question that is being asked by the horticulturist (plant scientist) in the background
Information?
2. (6pts) Therefore what is the Independent Variable (IV) that you're going to test?
3. (6pts) The Dependent Variable (DV) is what is affected by the Independent Variable. What is the Dependent Variable
In this experiment?
4. (12pts) Based on the scientific question (or problem), develop a hypothesis (prediction) that you are going to test by
performing the experiment.
IV
then
DV
11
because
• Perform the experiment by setting up your Control group and Ex
Answer:
1. Scientific question: Can detergent affect flower growth?
2. IV: The soap used in the study
3. DV: Flower growth
Explanation:
A scientific question is a well-sustained question about a given phenomenon of the real world which can be answered by experimental and/or observational procedures. A good scientific question must be testable and lead to falsifiable hypotheses. The dependent variable is the variable that is being measured in the experiment, (i.e. it is being affected by the experimental procedure). On the other hand, the independent variable is the variable that isn't changed by the other variables that are being measured in the experiment.