TIME REMAINING 51:02 Between 1940 and 1970 most scientists were already concerned about global warming. Please select the best answer from the choices provided T F
Answers
Answer:
False
Explanation:
Most scientists were not yet concerned about global warming. This was because the major issue during the period between 1940 and 1970 was global cooling with little or no attention on global warming.
However things started to change due to more pollution as a result of technological advances. Global warming started becoming a concern between 1970s and 1990s because of the increase in steady surface temperature.
Answer: FALSE
Explanation: I know I'm late but I couldn't find the answer to this question anywhere so I'm leaving it here. :)
Related Questions
Which of the following is not a Eukaryote? A. Bacteria B. Mushroom C. Human D. Oak tree
Answers
Answer:
A. Bacteria
Explanation:
Cells that contain a cytoskeleton, organelles surrounded by cytoplasm, nucleus surrounded by nuclear envelope, etc. are called eukaryotic cells. Animals, plants, and fungi are all made up of eukaryotic cells, but bacteria are not (they are prokaryotes).
hope this helps!
What are the function of areolar tissues ?
Answers
Areolar tissues are loose tissues that usually adhere to epithelia. Areolar tissues contain blood vessels(we know epithelial tissues don't have blood vessels). Their main role is to procure food for epithelial tissues.
In a hydrogen ion pump, the energy is used to join small molecules together to make larger ones. Which factor most likely has the greatest effect on the number of molecules mitochondria can produce?
Answers
Answer:
The amount of energy the flowing H(+) ions have
Explanation:
Hope it helps.
Answer:
B
Explanation:
APEX
name three factors needed for germination to occur in plants
Answers
Answer:
Three factors needed for germination to occur in plants:
1 - water
2 - sunlight
3 - air
Why are legumes self sufficient when it comes to nitrogen?
A. They have a different way of creating proteins that does not require nitrogen.
B. They have an organic process for using atmospheric nitrogen.
C. They have nitrogen fixing bacteria in their roots that converts nitrogen to nitrates for them.
D. They have bacteria that make them immune to eutrophication.
Answers
Answer:
It's c. They have nitrogen fixing bacteria in their roots
that converts nitrogen to nitrates for them.
Explanation:
Legumes are sufficient when it comes to nitrogen because they have nitrogen-fixing bacteria in their roots that convert nitrogen to nitrates for them. Thus, the correct option is C.
What are Legumes?Legumes may be defined as a plant that has fruit or seed, is utilized for food, and belongs to the family of legumes such as pea and bean.
Legumes plants have an excess of nitrogen-fixing bacteria in their roots which assists them with a sufficient amount of nitrogen by converting the organic nitrogen into inorganic nitrates that are easily consumed by plants.
Therefore, the correct option for this question is C.
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Hazards of air pollution by sulphur and its effects to the environment
Answers
Answer:
Environmental effects
When sulfur dioxide combines with water and air, it forms sulfuric acid, which is the main component of acid rain. Acid rain can: cause deforestation. acidify waterways to the detriment of aquatic life.
Describe how the water cycle moves water between the tree, the lake, and the sky in the picture below. Describe at least three of the water cycle processes you have learned about in the course. (10 points)
Answers
Answer:
The heat from the sun warms the water in the lake which evaporates and turns into water vapours. The water in the tree also rises into the atmosphere through a process, transpiration.
The water vapours rise into the atmosphere and forms clouds.
The water vapours in the clouds than condense into liquid water. Soon they'll get heavy and the water will fall down as rain, sleet, or snow.
Some of the rainwater sinks into the ground and is taken in by the roots of trees and plants.
This process keeps going on and on, and the water keeps shifting between the lake, tree and the sky.
A group of scientists is studying the internal parts of a cell. Which microscope is most appropriate for these scientists to use?
Answers
Answer: The most appropriate microscope for studying the internal parts of the cell is ELECTRON MICROSCOPE. The correct option is B.
Electron microscope, which is a compound microscope is usually used to study the internal environment of the cell because of the easiness with which one can easily distinguish the cell organelles from one another. Electron microscope gives great clarification of the cellular components and allow scientists to observe minute details about cellular structures. Electron microscope usually magnify specimens to one million times of their real sizes.
Answer:
[tex]\boxed{\mathrm{Electron \: microscope}}[/tex]
Explanation:
Electron microscopes have high range of magnification and resolution, the tiniest structures of cells and organelles can be viewed through the microscope. Scientists use it for biomedical research.
The frequency of spear grasses in different locations of an abandoned field is 40 After throwing a quadrant 80 times. Calculate its population size using a quadrant dimension of 1 square meter.
Answers
Answer:
40
Explanation:
The population size refers to the total number of individuals in a population. It can be obtained by counting the total number of individuals in a population. In a typical plant field where it is almost impossible to count the number of individuals, the population size can be mathematically estimated using the quadrat method:
Population size = (A/a) x n,
where A = area of the field, a = area of quadrat, and n = number of plants per quadrat.
In the illustration, the area of the abandoned field was not given. Hence, it is assumed that the area of the field is equivalent to the number of quadrat thrown. Since the size of the quadrat is 1 square meter:
Area of the field = 80 x 1 = 80 square meters.
Number of plant per quadrat = 40/80 = 0.5
Population size = 80/1 x 0.5 = 40
Therefore, the population size is 40 spear grasses.
Answer:
40
Explanation:
Question 6: What is the average number of staghorn corals within this time frame?
Answers
Answer:
14 percent
Explanation:
Answer:
14 %
Explanation:
What is a reproductive strategy?
a.) The way that a species creates offspring b.)The way that an organism hunts for food c.)The number of alleles an organism passes on d.) The DNA that is passed onto an offspring
Answers
Answer:
I am pretty sure that the answer is (a) The way that a species creates offspring.
Explanation:
The term reproductive strategy is loosely used to refer to the way an animal mates and/or raises offspring.
Which statement regarding serum magnesium (Mg ++) is true?
A) Alcohol-related diseases frequently cause low Mg+ levels.
B) Vomiting is not generally seen as a major cause of Mg+ loss.
C) Mg++ levels present similarly to calcium (Ca++) levels in the blood.
D) Mg+ deficiencies often result in low serum potassium (K+) levels.
E) Mg+ deficiencies must be treated before potassium (K+) deficiencies.
Answers
Answer: Option B,C,D and E.
Vomiting is not generally seen as a major cause of Mg+ loss.
C) Mg++ levels present similarly to calcium (Ca++) levels in the blood.
D) Mg+ deficiencies often result in low serum potassium (K+) levels.
Explanation:
Serum magnesium is the test that indicate the level of magnesium in the body. A person can have high serum magnesium or low serum magnesium.. serum magnesium is regulated by the kidney via henle loop.
A damage to the kidney can increase the magnesium level in the blood and cause hypermagnesemia. Renal failure cause magnesium excess and the body will not be able to excrete it.
Magnesium deficiency is similar to potassium deficiency.
A person with low magnesium may also have low calcium and low potassium because magnesium help to transport calcium and magnesium ions in and out of the body cells.
Administration magnesium is essential for correcting the hypokalemia. Magnesium deficiency inhibit and affect Na-K-ATPase, which in turn reduce cellular uptake of K+. A decrease in cellular uptake of K+, when it occurs along with increased urinary or gastrointestinal excretion, would lead to K+ wasting and hypokalemia.
magnesium deficiency exacerbates potassium wasting by increasing distal potassium secretion.
Vomiting is not a general cause of magnesium loss.
Therefore options B, C, D and E are correct
B) Vomiting is not generally seen as a major cause of Mg+ loss.
C) Mg++ levels present similarly to calcium (Ca++) levels in the blood.
D) Mg+ deficiencies often result in low serum potassium (K+) levels.
E) Mg+ deficiencies must be treated before potassium (K+) deficiencies.
During genetic engineering, what is the function of a Ligase enzyme? A. To create a plasmid. B. To bond the target gene to the plasmid with covalent bonds . C. To create sticky ends to bond to gene to the plasmid. D. To cut the DNA at a Recognition site.
Answers
Answer:
C
Explanation:
In DNA cloning, restriction enzymes and DNA ligase are used to insert genes and other pieces of DNA into plasmids.
Genetic engineering is the field that uses technology and deals with genetic material. It uses the ligase enzyme that joins the sticky ends of genes to the plasmid. Thus, option B is correct.
What is ligase enzyme?Ligase is a protein enzyme that is involved in catalyzing the large fragments of the genetic material with the plasmids to make recombinant DNA. It establishes new chemical bonds.
In genetic engineering, the ligase enzyme links the gene of interest to the plasmid's restriction ends (sticky end). They allow the integrity of the genome by joining the phosphodiester backbone of the genetic material.
It joins the gene with the restriction ends of the plasmid by the concomitant hydrolysis (covalent bonds) process of chemicals from large molecules. It allows the formation of the complete genome that now can replicate.
Therefore, option B. ligase bonds the gene with plasmids.
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Is the escape of a rattlesnake from a zoo exhibit an example of an invasive species?
Answers
Answer:
No, it isn't
Explanation:
An invasive species is characterized by an organism's appearance in an area it is not a native of, with a high capacity of reproduction that will cause it to be a threat to native species in that area. A species of organism is tagged "invasive" if it is foreign to a region/location and possess a high reproductive rate that spreads fast and causes harm to other species.
Based on the analogy given in this question about the escape of a rattlesnake from a zoo, it cannot be ascertained that it is an example of invasive species. This is because rattlesnakes may be native to that area and possess a zero threat level to the environment in terms of high spreading rate.
A murmur that is heard after the 1st heart sound and before the 2nd heart sound and is most easily auscultated in the 1st intercostal space immediately to the right of the sternum would most likely be caused by a:
Answers
Answer:
is caused by turbulence caused by the closure of mitral and tricuspid valves at the start of systole or
the closing of the atrioventricular valves
Explanation:
Heart murmurs are noises or vibrations caused by turbulence in blood flow in the heart.
murmur that is heard after the 1st heart sound and before the 2nd heart sound and is most easily auscultated in the 1st intercostal space immediately to the right of the sternum is caused by the closing of the atrioventricular valves or is caused by turbulence caused by the closure of mitral and tricuspid valves at the start of systole.
Systolic murmurs occur between the first heart sound (S1) and the second heart sound (S2). It is called the lub sound i.e the first sound.
Proteins play key roles in olfaction. One kind of protein, called ___________, attaches itself to hydrophobic odorant molecules so that they may dissolve in watery mucous. A second class of proteins, to which odorant molecules become bound and initiate transduction, are coded by the largest family of genes in mammals and are called ___________ . Group of answer choices
Answers
Answer:
The correct answer is "Odorant-binding proteins (OBPs); Olfactory receptors (ORs)".
Explanation:
Odorant-binding proteins (OBPs) are low-molecular soluble molecules that are secreted in high amounts in the nasal mucus layer. The precise biological activity of OBPs remains unclear, however, its solubility and ability to attach to hydrophobic odorant molecules suggest that they acts as carriers. A second class of proteins called olfactory receptors (ORs), act at the genetic level by initiating transduction once odorant molecules attach to them. ORs are coded by the largest family of genes, which include more than 100 genes and pseudogenes that represent around 3% of the genome.
What is a Krebs Cycle
Answers
Answer:
Krebs cycle. A series of chemical reactions that occur in most aerobic organisms and are part of the process of aerobic cell metabolism, by which glucose and other molecules are broken down in the presence of oxygen into carbon dioxide and water to release chemical energy in the form of ATP.
Explanation:
Inflammation is a(n):______.
a. non-specific process that occurs in avascular tissue.
b. antigen-specific process that occurs in avascular tissue.
c. antigen-specific process that occurs in vascularized tissue.
d. non-specific process that occurs in vascularized tissue.
Answers
Answer:
c
Explanation:
Because that is what google said
Explanation:
Because I think it is
Certain genetically modified strains of maize produce a powerful natural insecticide. The insecticide occurs throughout the plant, including its pollen. Maize pollen is dispersed by the wind and frequently blows onto milkweed plants that grow near maize fields. Caterpillars of monarch butterflies feed exclusively on milkweed leaves. When these caterpillars are fed milkweed leaves dusted with pollen from modified maize plants, they die. Therefore, by using genetically modified maize, farmers put monarch butterflies at risk. Which of the following would it be most useful to determine in order to evaluate the argument?
A. Whether the natural insecticide is as effective against maize-eating insects as commercial insecticides typically used on maize are
B. Whether the pollen of genetically modified maize contains as much insecticide as other parts of these plants
C. Whether monarch butterfly caterpillars are actively feeding during the part of the growing season when maize is releasing pollen
D. Whether insects that feed on genetically modified maize plants are likely to be killed by insecticide from the plant's pollen
E. Whether any maize-eating insects compete with monarch caterpillars for the leaves of milkweed plants growing near maize fields
Answers
Answer:
The correct answer is:
Whether any maize-eating insects compete with monarch caterpillars for the leaves of milkweed plants growing near maize fields (E)
Explanation:
Since the argument has to do with the elimination of caterpillars of monarch butterflies by the insecticidal property genetically modified strains of maize, in order for the argument to hold valid, every other factor that could result in similar effect of the death of carterpillars of monarch butterflies has to be ruled out. one such factor is competition; when another species struggle for limited available nutrition with the carterpillers which can result in their death, and can easily be confused as the effect of the insecticidal property of the modified maize strain.
what is an example of codominaces
Answers
Answer:
a person with type AB blood or a roan fur in cattle which is when cattle have a mixture of white and red fur
What is the type of mouth part found in the female anopheles?
Answers
Answer:
Piercing and sucking mouthpart
Explanation:
Hope it helps.
There are three main states of matter: liquid, solid, and gas. All have different physical
properties. Which statement describes the physical state of a solid but not of a liquid or a
gas?
a. It has its own shape.
b. It does not have its own shape.
c. It takes the shape of its container.
d. It changes shape with temperature,
Answers
Answer:
A. It has its own shape
The statement which describes the physical state of a solid but not a liquid or a gas is Choice A: It has it's own shape.
The three main states of matter as known are;
SolidLiquid andGasIn the solid state of matter, the particles are tightly packed together as opposed to the case in fluids (liquids and gas).
As such, solids have their own (definite) shape, a characteristic which is not present in liquids and gases.
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After reading the paragraph below, answer the question that follows In the North Pacific Ocean, two groups of the same species of killer whales (Orcinus orca) appear to be forming two different species based on what they eat. One group eats fish and the other eats mammals such as seals. Another difference between the two groups is in how they hunt. Whales that hunt fish tend to travel in large pods (groups of whales) and vocalize often. Whales that hunt seals, however, tend to travel in very small groups and vocalize very little. If these hunting differences brought about speciation, the separation would be considered:____________
Answers
Answer:
behavioral separation
Explanation:
The separation leading to the speciation of the two groups of killer whales would be considered a behavioral separation.
Behavioral separation or isolation is a form of separation that occurs between two groups of individuals (that use to be of the same group) as a result of preference for a particular behavior or set of behaviors.
The preference for the behavior eventually leads to the two groups becoming separate species, a form of speciation known as sympatric speciation.
An example of positive feedback loop would be: A. the release of glucagon in response to low blood sugar B. all of the above C. the release of a hormone in response to a single stimulus D. the release of oxytocin in response to stretching of the uterus
Answers
D. The release of oxytocin in response to stretching of the uterus.
Explanation:
There are two types of feedback loops, negative and positive.
Negative feedback loops' main goal is to maintain homeostasis, or equilibrium within the body. When there is a stimulus, the negative feedback loop will try to make the output less than it is, to make homeostasis equal again. An example of this would be regulating blood sugar. If your blood sugar levels are low, your body will release glucagon to make them higher, that is a negative feedback loop.
Positive feedback loops' main goal is to make the reactions go by more quickly, it makes the equilibrium unstable while accelerating the reaction. An example of this would be releasing chemicals in the body such as oxytocin, during childbirth to make it less painful and to speed up the process.
Drag each tile to the correct box. Arrange the steps in the correct order to describe how a reflex occurs. A receptor detects a signal. A sensory neuron sends a signal to the spinal cord. A bone moves. A relay neuron sends a signal to a motor neuron. A muscle receives a signal to contract. ↓ ↓ ↓ ↓
Answers
The reflex arc is the sequence of events since a stimulus reaches the body, until the body reacts to it. The correct order is a, b, d, e, c.
What is the reflex arc?The reflex arc refers to the sequence of events since the body receives an external stimulus until it reacts to it.
In general terms,
A stimulus of varying nature reaches the body. The peripheric nervous system -PNS- receives the stimulus and sends this information to the central nervous system -CNS-. The CNS processes the information and sends another signal as a response to the stimulus.This mechanism is known as the reflex arc.
Five elements compose the reflex arc, which are receptors, three types of neurons, and effectors.
There are three types of neurons involved in the mechanism:
• Afferent or sensorial neurons
• Interneurons
• Efferent or motor neurons
Action:
Ascending branch1) The stimulus reaches the body and is received by the specialized sensory receptors.
2) Information is received by these receptors and converted from stimuli energy (temperature, pressure, light, etc.) to action potential energy.
3) Afferent neurons, placed in the dermis and epidermis, receive information from receptors, react and send the information to the central nervous system as nerve impulses.
Descending branch4) Once the information reaches the central nervous system, it is processed by the interneurons that analyze it before sending a response.
5) Interneurons manage many sensorial signals, evaluate and compare them, and send a motor response.
6) Efferent neurons receive information from the interneurons and are stimulated to carry these new signals from the central nervous system to the cells of the effector organs. The effector organ can be a muscle or a gland.
7) Finally, the target tissue responds to the stimulus as a contraction, if it is a muscle, or as hormones release if it is a gland.
In the exposed example, the corrcet order is
a- A receptor detects a signal.
b- A sensory neuron sends a signal to the spinal cord.
d- A relay neuron sends a signal to a motor neuron.
e- A muscle receives a signal to contract.
c- A bone moves.
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Natural killer (NK) cells __________. Natural killer (NK) cells __________. engage in immunological surveillance recognize and kill cancer cells cause abnormal cells to undergo lysis NK cells perform all of these roles.
Answers
Answer:
NK cells perform all of these roles
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-lvr
Which type of wind is pictured?
A. Sea breeze
O B. Global wind
O C. Prevailing wind
O D. Land breeze
Answers
Answer:
Sea Breeze
Explanation:
The hot air from land is going and is is becoming cool air from the ocean
Answer:
A Sea Breeze
Explanation:
Jenna began making a model to show the processes which resulted in the formation of oceans. Art shows three boxes connected with arrows. The label on the first box is 'Water fills the basins', second box is 'Segments of Earth's crust move',and the third box is labeled with a question mark. Which of the following would be the next step in the process? Crust is broken down Earth’s crust moves Earth’s plates meet Sea floor spreading
Answers
Answer:
Crust is broken down
Explanation:
In the formation os oceans, at first water fills the basins, in the second step segments of Earth's crust move and in the third step crust is broken down.
In the oceans when water fills the basin, it allows the Earth's crust to move which makes it folded or break apart. When the crust is broken down along with deep cracks, it is filled with water from streams and rainfall flowing in the ocean.
Hence, the correct option is "Crust is broken down".
Answer:
Earth's plates meet
Explanation: After Earth's crust formed, and water filled the basins, giant segments of the crust began to move. These segments are known as lithospheric plates or tectonic plates. The plates float on Earth's molten interior like rafts of rock. The plates move around, driven by convection currents from the Earth's mantle. The plates move over and under and past each other. Where the plates meet, Earth's crust is constantly formed and re-formed.
The function of Mitosis is to produce daughter cells that _______. have the same number of chromosomes as the parent cell but not the same genetic make-up are genetically identical to the parent cell have a random assortment of maternal and paternal chromosomes
Answers
Answer:
The function of Mitosis is to produce daughter cells that are genetically identical to the parent cells. have the same number of chromosomes as the parent cell but not the same genetic make-up are genetically identical to the parent cell have a random assortment of maternal and paternal chromosomes
(The answer is underlined above)
Explanation:
Mitosis is a nuclear division. This division results in the generation of two daughter cells that are genetically identical to the parent cells and each daughter cell contains the same number of chromosomes and all cell content inherited from the parent cell. Mitosis is involved in cell development of new cells and old one, growth of both new cells and old ones, and asexual reproduction.
The chromosomes which are the DNA molecule that makes up the fundamental genome of the cell are copied before mitosis. This made sense to explain how important it is for chromosomes of the cell to be copied first before mitosis so as to enable the separation of the chromosome copies to give each cell a full set of identity similar to the one copied from.
The function of mitosis is to produce daughter cells, which are genetically identical to the parent cell.
What is mitosis?It is the process in which two daughter cells are produced, which are identical genetically to each other, and to the parent cell. The process initiates with a diploid cell with 2N chromosomes and 2X DNA content, and at the end of the process two identical cells get produced each having same number of chromosomes and DNA content.
The replication of all the eukaryotic cells takes place by the process of mitosis, apart from germline cells, which replicate via the process of meiosis. The different phases of mitosis are:
ProphaseMetaphaseAnaphaseTelophaseCytokinesisThus, the correct statement is that the daughter cells are genetically identical to the parent cell.
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relation of acceleration of a body to its mass and applied force..
Answers
Answer:
The more mass a body has, more force needs to be applied for it to accelerate.
Explanation:
The relation of acceleration of a body to its mass and applied force is discussed in Newton's second law of motion.
Newton's second law of motion states that the more mass a body has, more force needs to be applied for it to accelerate.
Answer:
The Newton's second law of motion come with an explanation for the behavior of the objects when forces are applied to the objects. It states that external forces cause objects to accelerate.