Answer:
the answer is defiantly not D nitrates can kill fish not overpopulate them the best answer i can think of is A
Explanation:
Farmers be concerned about unused nitrates contaminating surface water and groundwater supplies by unused nitrates increase oxygen in the water.
What is Groundwater supplies?Depending on a variety of conditions, the water table may be deep or shallow and may rise or sink. The water table may increase due to strong rainfall or the melting of snow, or it may sink due to extensive groundwater pumping.
Rain and snow melt that seeps into the voids and fissures beneath the surface of the earth replenishes or recharges groundwater supplies.
Due to the rapid consumption of groundwater compared to its natural replenishment, there are severe water shortages in several parts of the world. In some places, human activity has contaminated the groundwater.
Therefore, Farmers be concerned about unused nitrates contaminating surface water and groundwater supplies by unused nitrates increase oxygen in the water.
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A substitute is a good that is _____ another good, and a complement is a good that is _____ another good.
a. produced in place of; sold with
b. consumed in place of; produced with
c. consumed in place of; consumed together with
d. consumed together with; consumed in place of
The right option is c. consumed in place of; consumed together with
A substitute is a good that is consumed in place of another good, and a complement is a good that is consumed together with another good. Substitutes serve in place of another and complements make something seem better.
Dr. proctor is conducting an experiment to see if hummingbirds will visit red flowers more or less often than they visit yellow ones. what will be the independent variable in dr. proctor's experiment
Final answer:
The independent variable in Dr. Proctor's experiment is the color of the flowers, specifically whether they are red or yellow.
Explanation:
In Dr. Proctor's experiment, the independent variable is the color of the flowers, specifically whether they are red or yellow. The independent variable is the variable that is manipulated or changed by the researcher in order to observe its effect on the dependent variable, which is the variable being measured or observed. In this experiment, Dr. Proctor is testing whether hummingbirds will visit red flowers more or less often than yellow flowers, so the color of the flowers is the independent variable.
The lac repressor in bacteria is analogous to _____ in eukaryotes. genes general transcription factors, such as tfiid specific transcription factors the p21 cdk inhibitor
Which is the best description of sexual reproduction in plants
Plants reproduce sexually through their flowers. The flowers have both the male and the female organs. Pollens contain the male gametes and the stimage is a long tube connecting to the female organ of ovary that has the female gametes. The pollen grains need to stick to the stigma for the pollination to begin. This can happen in two ways:
a. Self-pollination: When the pollens of the same plant or flower end up on its stigma. This can happen by the force of wind.
b. Cross-pollination: When the pollens of one plant end up on the stigma of the other plant's flower. This happens when insects while visiting a flower get pollen grains stuck on their body and deposit it at the stigma of the other plant's flower when they sit on it.
The best example would be of the Hibiscus and the Yucca plant flower, each of which gets pollinated by insects.
Naphthylamine is a carcinogen compound found in cigarette smoke. it chemical modifies dna, distorting the dna helix. what cellular mechanism would you expect to be involved in fixing dna damaged by naphthylamine
Some isotopes are_____ , which makes them suitable for medical imaging procedures.
Answer:
Isotopes such as fluorine-18, gallium-67, krypton-81m, rubidium-82, nitrogen-13, technetium-99m, indium-111, iodine-123.
Explanation:
For diagnostics, medical imaging radiopharmaceuticals are used intravenously or orally. After which external detectors catch the images from the radiation that is emitted from these isotopes also used in MRI and CT scanners.
Iodine 123 is used for examining the whole body part. In developed countries about 26 % of the population use 2%/ year of these medications for the therapies, and these nuclear medicines were developed in the 1950s by physicians who emphasized there use of Iodine 131 for the treatment of thyroid disease.
These isotopes consist of molybdenum-99, which has half-life 66 hours,
Process by which a cell takes in a substance by surrounding it with the cell membrane; active transport
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1. Boron is to the immediate left of carbon in the same row in the periodic table. Which of the following statements compares the radius and pull exerted by the protons of boron and carbon atoms?
Boron has a smaller radius and the protons in carbon exert a greater pull.
Boron has a larger radius and the protons in carbon exert a greater pull.
Boron has a smaller radius and the protons in carbon exert less pull.
Boron has a larger radius and the protons in carbon exert less pull.
2. Which of the following is a compound?
Cl2
H2O
He
H2
1. Boron has a smaller radius and the protons in carbon exert a greater pull.
2. H2O
1. Boron and carbon have the same number of electron shells, but boron has one less proton in its nucleus than carbon. This means that boron has a smaller radius than carbon due to a weaker nuclear charge, but carbon has a greater pull exerted by its protons due to a stronger nuclear charge.
2. A compound is a substance that consists of two or more different elements chemically bonded together in a fixed ratio.
Cl2 and H2 are both molecules, but they are not compounds because they consist of only one element (chlorine and hydrogen, respectively).
He is a noble gas and exists as individual atoms, not as a compound.
What two processes of digestion begin in the mouth how do they differ?
interstitial cells surrounding seminiferous tubules produce testosterone in response to __________.
Particular care must be taken when using radiation for medical imaging. this is the result of radiation's ability to create __________ in human tissue and possible biochemical changes.
a. ionizations
b. radio waves
c. sound waves
d. thermal changes
Why is gallbladder positioned so closely to the liver in frog?
Is a jellyfish unicellular or multicellular?
the condition known as _____ is characterized by hypertension, edema, and proteinuria.
a. preeclampsia
b. uterine prolapse
c. oophorectomy
d. eclampsia
A. Pre-eclampsia
Pre-eclampsia also known as pregnancy induced hypersion or toxemia. It is a pathological condition in pregnancy that is characterized by hypertension, edema and proteinuria. However, pre-eclampsia is a symptom that is associated with late pregnancy that encompasses both convulsive and non-convulsive stage.
Adipose tissue that surrounds organs in the abdomen is known as
Memories that are related to specific life experiences, such as recalling the events of a vacation, are called __________ memories.
Answer:
Memories that are related to specific life experiences, such as recalling the events of a vacation, are called episodic memories.
Explanation:
Human memory is composed of different types of memory. Episodic memory require recollections of a specific event or an episode for remembering events that occurred during a vacation, People associates particular details with an episodic memory, such as how they felt, the time and place, and other particulars. Thanks to this memory we have the ability to recall and mentally re-experience specific episodes from one's personal past, the individual is able to re-experience individual events. For example people can remember who was on vacation, where it occurred, and their own personal interactions.
The maximum velocity (vmax) of an enzymatic reaction is an important piece of information regarding how the enzyme works. what series of measurements can be taken in order to infer the maximum velocity of an enzyme-catalyzed reaction
The rabies virus is most commonly transferred through what?
Saliva
Rabies virus is an infectious virus which causes rabies in human and animals. Rabies is transmitted mostly through the saliva of infected animals such as birds and bats. Transmission of the virus through the human saliva is rare. Signs and symptoms of rabies virus include fever, headache, partial paralysis, and vomiting.
In which stage of the Calvin cycle does the plant cell produce energy for storage?
For anyone who believes that the answer is "regeneration," that's incorrect.
What Are Genes?
A. the observable characteristic
B. the expressed trait
C. the basic unit on inheritance
D. the measurable factor
What neurotransmitter systems do methylated amphetamines affect?
Methamphetamine is neurotoxic to dopaminergic neurons in the human’s midbrain. It increases the amount of the dopamine in the brain and as a result, produces the euphoria feeling that many people experience. It is also indicated that high-dose methamphetamine use can be neurotoxic to serotonin neurons (with the potential of damaging neurons).
The human immunodeficiency virus (hiv) that causes the disease known as aids selectively infects ________ cells.
The human immunodeficiency virus (HIV) that causes the disease known as aids selectively infects helper T cells (CD4+).
This retrovirus also infects macrophages and dendritic cells. When CD4+ T cell numbers decrease below a critical level (due to the killing of this cells with different mechanisms), cell-mediated immunity is lost. As a result, the body becomes progressively more susceptible to infections, leading to the development of AIDS.
HIV can be transmitted only via body fluids like blood, semen, pre-seminal fluid, rectal fluids, vaginal fluids, and breast milk, which means that people usually get or transmit HIV through sexual behaviours and use of the needle. For HIV infection, these fluids must come in direct contact with a mucous membrane or damaged tissue. Another way is to be directly injected into the bloodstream (from a needle for example).
What do we call an organized profile of a person's chromosomes?
The condition in which an individual has three copies of a chromosome is known as
What two layers of the egg must the sperm penetrate to reach the egg's plasma membrane?
What happens as a direct result of an endangered species dying out ?
A. Loss of biodiversity
B. Ecosystem balance
C. Habitat loss
D. Climate change
Answer: A. Loss of biodiversity
Endangered species are those animal or plant species which are at risk of being extinct. The number or population of such species decreases either rapidly or suddenly due to loss of habitat, migration, hunting, poaching, climate change and because of other reasons.
The loss of endangered species from the native habitat can directly reduce the available biodiversity.
Answer:
Loss of biodiversity
Explanation:
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1. Based on Dalton's atomic theory, which of the following is true about all atoms of the same element?
They have different masses.
They have the same properties.
They can be divided into molecules.
They are composed of visible matter.
2. Boron is to the immediate left of carbon in the same row in the periodic table. Which of the following statements compares the radius and pull exerted by the protons of boron and carbon atoms?
Boron has a smaller radius and the protons in carbon exert a greater pull.
Boron has a larger radius and the protons in carbon exert a greater pull.
Boron has a smaller radius and the protons in carbon exert less pull.
Boron has a larger radius and the protons in carbon exert less pull.
Which of the following comparisons would be an inaccurate analogy between prokaryotic cells and eukaryotic cells?
A) A eukaryotic cell is like a college campus while prokaryotic cell is like a one-room schoolhouse
B) A eukaryotic cell is like a flip phone while a prokaryotic cell is like a iPhone
C) A eukaryotic cell is like the mall while a prokaryotic cell is like Walmart
D) A eukaryotic cell is like a car while a prokaryotic cell is like a bicycle
Which of the following affects the speed of a planet's revolution?
Shape of the planet
Gravity of the sun
Temperature of the sun
Atmosphere of the planet
The gravity of the sun affects the speed of a planet's revolution.
What is revolution?Revolution refers to the orbital movement of a celestial body, such as a planet, around another object, typically a star. It is the path or trajectory followed by the celestial body as it completes a full orbit around its central object.
During revolution, the celestial body maintains a relatively constant distance and orientation with respect to the central object due to the gravitational attraction between them. This orbital motion defines the planet's year or orbital period, which is the time it takes for the planet to complete one revolution. The revolution of a planet is a fundamental aspect of its motion within a solar system or galaxy.
The speed at which a planet revolves around its star, such as the sun, is primarily determined by the gravitational pull between the planet and its star. The strength of the gravitational force depends on the mass of the star and the distance between the planet and the star. According to Kepler's laws of planetary motion, planets that are closer to their star experience a stronger gravitational force, leading to higher orbital speeds.
Conversely, planets that are farther away experience a weaker gravitational force, resulting in slower orbital speeds. Therefore, the gravity of the sun directly influences the speed of a planet's revolution around it.
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What are introns and Exons??