Differences Between Pteridophytes and Seed Plants
Pteridophytes don't produce cones, flowers, or fruit, unlike these seed plants. Instead, Pteridophytes produce spores. Spores are living, single-celled structures that are essential to the life cycle of many plants.
(hope this helps ✌)
who discovered mma disease
Answer:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5982627/
Explanation:
PLEASE HURRY! Pre-lab: When viewing nodule cells through a microscope, how can we determine which cells are infected with bacteria?
Question 6 options:
A. The cells that are larger are infected.
B. The cells that are smaller are infected.
C. The infected cells may be pink.
D. The infected cells will be colorless.
Both A and C
Both B and D
When viewing nodule cells through a microscope,cells that are infected with bacteria will be larger and may be pink; both options A and C.
What are signs of infections?The signs of infection by a disease-causing organisms in another organism include inflammation, and a change in the coloration of that organism.
An infection of root nodules will be indicated by swelling and change in coloration.
Therefore, when viewing nodule cells through a microscope, cells that are infected with bacteria will be larger and may be pink.
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What best describes the association between the carbon cycle plants and animals
Answer:
Plants fix carbon and release oxygen, and animals release carbon and use oxygen.
Explanation:
what is not a main crop that has been genetically modified?
When minute samples of DNA need to be genetically analyzed for identification purposes, which test can be effectively used to make more of the DNA
Answer:
When minute samples of DNA need to be genetically analyzed for identification purposes, which test can be effectively used? Fluorescent dye can be used as a label to trace antibody-antigen reactions in an ELISA assay
DNA is the genetic material that is the unit of inheritance. Small DNA samples can be increased in amount by the technique called PCR. Thus, option D is correct.
What is PCR?Polymerase chain reaction (PCR) is the technique used in biotechnology to quantitatively increase the amount of genetic material. It has been known to create billions and millions of copies of the sample.
The small DNA sample can be amplified by the process of PCR which involves the production of the DNA sample by the polymerase and primers to add the bases to the strand.
The DNA undergoes thermal cycling where the temperature of the system first increases in denaturation followed by a drop in temperature in annealing and lastly again a rise of temperature in extension.
Therefore, the PCR technique can increase the amount of small DNA samples.
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Your question is incomplete, but most probably your full question was, When minute samples of DNA need to be genetically analyzed for identification purposes, which test can be effectively used?
A. direct fluorescence antibody
B. Widal
C. Weil-Felix reaction
D. PCR
E. direct antigen reaction
Please help if you can!!
part d
changes in ecosystems can be attributed to natural causes, such as natural disasters, seasonal variations in climate, currents, and tidal activity. many of these changes can affect the amount of food
resources available in an ecosystem. research one natural change that currently affects or could affect
the aquatic ecosystem you chose. use your food web model to explain how this change can affect the
competition of food resources in your aquatic ecosystem.
the ecosystem that i made my food web model after was the san francisco bay!!
A natural change that currently affects or may affect the aquatic ecosystem of the bay of san francisco is the warming of the waters due to global warming and rising river levels.
What happens to water in global warming?As a result of global warming and the increase in the emission of greenhouse gases, the heat retained in the atmosphere ends up being stored in the oceans, affecting the temperature and circulation of water, in addition to accelerating the process of melting of the polar ice caps.
With this information, we can conclude that a natural change that currently affects or may affect the aquatic ecosystem of the bay of san francisco is the warming of the waters due to global warming and rising river levels.
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What effect do rising sea levels have on coastal communities? (4 points)
Increased exporting
Loss of coastal land
Shortage of fish
Decreased storms
Answer:
3
Explanation:
because loss of costal land in sea area
What would you expect to happen to your Expiratory Reserve Volume when you are treading water in a lake
The Expiratory Reserve Volume will decrease when an individual is treading water in a lake.
What is Expiratory Reserve Volume?Expiratory Reserve Volume, ERV, is the additional volume of air which can be forcefully expired with maximum extra effort beyond the volume that can be expired in normal expiration.
ERV normally decreases with exercise.
Therefore, the Expiratory Reserve Volume will decrease when an individual is treading water in a lake.
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How does sea level change when Earth's global temperature is lower?
A. Glaciers grow bigger, causing sea level to fall.
B. Glaciers grow smaller, causing sea level to fall.
C. Glaciers grow smaller, causing sea level to rise.
D. Glaciers grow bigger, causing sea level to rise.
Glaciers grow smaller, causing sea level to rise when Earth's global temperature is lower. Thus, the correct option is C.
Sea level lowers during cold climate periods, known as glacial epochs or ice ages, due to a shift in the global hydrologic cycle, in which water evaporates from the oceans and is stored on the continents as massive ice sheets, extended ice caps, ice fields, and mountain glaciers. At the last glacial maximum, some 20,000 years ago, global sea level was about 125 meters lower than it is today.
What is interglacial epochs?Because the melting North American, Eurasian, South American, Greenland, and Antarctic ice sheets returned their stored water to the world's oceans as the climate warmed, sea level rose. Sea level is at its highest during the warmest eras, known as interglacial epochs.
We are currently living in the most recent interglacial, which began around 10,000 years ago and is referred to by geologists as the Holocene Epoch. Sea levels were about 3 to 20 meters higher than they are now during several previous interglacials.
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During lunch each day, Alex and Hailey have been noticing the trashcans around the lunchroom are filling rather quickly with cans and bottles. They decide a recycling program would be beneficial for their school and the environment, so they brainstorm ways to get the program started. Before discussing their idea with the principal, they need to decide which of their plans would best solve the problem. Which of their ideas would best solve the problem with the least amount of inconvenience (disturbance) for everyone involved?
options:
A. Place plastic and metal recycling bins next to each lunchroom trash can.
B. Remove all vending machines that sell plastic bottles or aluminum cans.
C. Get a petition started to build a recycling center close to the school.
D. Ask volunteers to separate recyclable materials from the trash.
Latest advancements in the field of biotechnology.How it contributed to welfare of mankind?
Explanation:
Like all technologies, biotechnology offers the potential of enormous benefit but also potential risks.
Biotechnology could help address many global problems, such as climate change, an aging society, food security, energy security and infectious diseases, to name just a few.
Our council intends to build a map of these global problems, which will show which biotechnologies could help with each global challenge. To do that, we will also take into consideration a realistic timeline, potential risks involved and other factors. Hopefully, the result will be a state-of-the-art biotechnology vision report that includes not only policy suggestions but also in depth information for both experts and the public.
The latest advancements in the field of biotechnology contributed to the welfare of mankind by alleviating hunger and remedying diseases.
What is biotechnology?Biotechnology refers to all human applications based on biological systems that can be used to solve a given problem.
Biotechnology helped to alleviate hunger in the world by developing crops that are resistant to drought and pests.
In conclusion, the latest advancements in the field of biotechnology contributed to the welfare of mankind by alleviating hunger and remedying diseases.
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Urbanization can result in negative impacts on the environment. How can transportation methods be improved to reduce the impact of urbanization on the environment? (4 points)
Increase the number of travel lanes on roadways to allow for more vehicles
Limit the number and location of vehicle charging stations
Plan housing and business developments that are within walking distance to businesses and parks
Provide additional bus stops for people to save time instead of walking to work
The right thing to do would be to plan housing and business developments that are within walking distance of businesses and parks.
Effects of urbanizationUrbanization often requires the removal of forests for construction. Urban areas are usually also characterized by a copious number of vehicles on the road
These impact the environment negatively through pollution.
When housings are planned such that they are at trekkable distances to businesses, there would be fewer vehicles on the road and the impact on the environment will reduce accordingly.
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Did you understand what a control in an experiment was? meowsis
Answer:
A control in an experiment is a replica used to confirm that the results or changes in the dependent variable/s are caused by the independent variable values or treatments. There are different kinds of controls according to the experiment, for example, no treatment can be applied, or for example in laboratory experiments, there are controls to check that the reactives function properly, making a replica with them but without the sample that is being measured.
Explanation:
Fill in the blanks.
Question 1:
_______or _____ ___ lines in layers of rock indicate that rock is ______________. There is __ ______ in the geologic record.
Question 2:
In order for an _______________ to separate rock layers, the layers must have __________ __________ already. Intrusions are always __________ than the layers they cut through.
Question 3:
The youngest rock layers are on __________ and the oldest are on the ______________
The youngest layer present on the top whereas the oldest layer is present at the bottom.
Which layer is youngest or oldest?Quartz or calcite lines in layers of rock indicate that rock has minerals.
The youngest rock layers are present on the upper while on the other hand, the oldest are present on the bottom side because new layers are formed when there more sediments deposited on the layer.
So we can conclude that the youngest layer present on the top whereas the oldest layer is present at the bottom.
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A population contains a lot of diversity in genetic traits.
What condition does this describe?
variation
competition
overproduction
differential reproduction
According to these data, the unknown bacterial
species is most closely related to
1) species l
2) species ll
3) species lll
4) species lV
Answer:
4
Explanation:
species IV
How do products and reactants of photosynthesis and cellular respiration relate?
Answer:
Photosynthesis converts carbon dioxide and water into oxygen and glucose. Glucose is used as food by the plant and oxygen is a by-product. Cellular respiration converts oxygen and glucose into water and carbon dioxide. Water and carbon dioxide are by- products and ATP is energy that is transformed from the process.
I need help. The class of macromolecule that would most likely be involved in contracting muscles would be ?
Hemophilia is an inherited disease.
True
False
Answer:
inherited in an X-linked recessive manner, so I believe so
Explanation:
Answer: True
Explanation: Hemophilia is usually an inherited bleeding disorder in which the blood does not clot properly.
Electrons have a small negative charge.
True
False
true
Explanation:
Electrons have a negitive, while protons have a positive change. protons and electrons have the same size, theybare just opposite. hope this helps!
Answer:
True
Explanation:
Electrons negative, Protons Positive.
Plants need oxygen to release the energy in the food that they make.
A. True
B. False
Explanation:
plants doesn't need oxygen to release the energy in the food that they make.
it's the same oxygen we breath.
the answer is false
There is a variety of verbal and physical techniques for controlling and restraining animals . List some of the verbal and physical techniques that you use to restrain or control your pet or family pet at homeWhich techniques would you specifically use when you take your pet to a veterinarian and why?
The appropriate restraint is all about empathy, finesse, and technique. There is a problem with the utilized technique for that procedure on that animal for that day if it takes more than two individuals to really hold the animal during any process. The more participants there are, the more threatened the animal will feel and the easier it will be for someone to get hurt.
Why Proper Restraint Techniques used for pets?prevents harmrequired for tests and treatmentsA First Aid Kit should be ready for all bites and scrapes for the animal's and handler's comfort.The New York Department of Health must be notified of any animal bites.Dog Restraint & Handling:
Standing restraint
Put the forearm of one arm, while holding the dog's head, under its neck.To bring the animal closer to the handler, the second arm is wrapped around its body.Useful on a table or the floorUse
Exams in generalRetrieval of SpecimensCut NailsSitting Restraint
The same method as the standing restraint, but with the dog sitting
To stop a dog from backing up, it can be against a wall.
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a. Create a data table to compare and contrast the physical features of the three skeletons.
b. Put them in order of oldest to most recent. Write down the inferences you made to decide upon the chronological order of these
skeletons in evolutionary history.
c. Provide at least 2 pieces of evidence that support the order you determined for the 3 skeletons.
According to the images, it can be concluded that the organization of the skeletons from the oldest to the most recent is C, A and B, because they show human evolution.
How are skeletons organized and why?The skeletons are organized chronologically from the oldest to the most recent as follows: C, A and B. This organization is due to the fact that some particular characteristics are evident in each of them, such as:
In skeleton C, it is the oldest because it has a tail and its position is quadrupedal, it can be related to the primates from which the human emerged.Skeleton A is the intermediate point between the primate and the human, it maintains a quadrupedal position but more upright and no longer has a tail.Skeleton B is the most recent example of a skeleton because it already walks completely upright and its morphology is the most similar to that of a contemporary human.Learn more about skeletons in: https://brainly.com/question/14446520
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A scientist is studying an aquarium ecosystem that contains water, plants, and fish that eat those plants. The aquarium has glass walls so light can get in, but it is sealed so no material can move into or out of the tank. When the scientist turned the aquarium's light on, carbon dioxide in the water started decreasing. How is carbon moving and what is happening to the amount of carbon in the living things inside the aquarium? Explain your thinking as completely as possible.
PLEASE PLEASE PLEASE CAN SOMEONE HELP ME WITH THIS QUESTION!!!
IT'S DUE IN LESS THAN 15 MINUTES
Carbon moving and what is happening to the amount of carbon in the living things inside the aquarium is by photosynthesis.
What is aquarium?
An aquarium (plural aquariums or aquaria) is a vivarium, usually contained in a clear-sided container (typically constructed of glass or high-strength plastic) in which water-dwelling plants and animals (usually fish).
According to this question, the aquarium contains water, plants and fish. The glass of the aquarium is transparent and allows the passage of light. Plants are unique set of organisms that have the ability to produce their own food (organic molecule) using the energy from light which they absorb via the Chlorophyll pigment in their Chloroplast. This process carried out by plants is called PHOTOSYNTHESIS.
The amount of carbon in form of carbondioxide (CO2) decreases when the light was switched on in the aquarium due to the process of photosynthesis carried out by the plants.
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Models are important in science. Some models are verbal models, which are full elaborate descriptions that can help someone visualize the concept. You have seen various visuals of Earths layers. Create a verbal model of
Earth
s interior. In your model, describe the following:
1. The main layers of Earths interior and the indirect evidence that helped us determine the layers.
2. The flow of matter in the mantle and in the core and the effects of that flow.
3. The source of thermal energy and how energy flows throughout the layers. (Hint: think of the cause of the convection currents)
The main layers of Earths interior are the inner core, the outer core, the mantle and the crust.
What is the indirect evidence that helped us determine the layers?Use of seismic waves is the indirect evidence that helped us determine the layers. When earthquakes occur they produce seismic waves.
The flow of matter occurs by convection. The dense crust subducts back into the mantle exert forces on crustal plates that then move, producing tectonic activity.
So we can conclude that The main layers of Earths interior are the inner core, the outer core, the mantle and the crust.
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Which pollutant is a constituent of soot? a. methane b. black carbon c. hfcs d. pops e. tropospheric ozone
The pollutant that constitutes soot is black carbon. Details about soot can be found below.
What is soot?Soot is a fine black or dull brown particles of amorphous carbon and tar, produced by the incomplete combustion of coal.
Based on the above definition of soot, it suggests that carbon is a major constituent.
Soot is an environmental pollutant that causes harm when inhaled by biotic components of the environment.
Therefore, the pollutant that constitutes soot is black carbon.
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what process adds carbon dioxide to the air
Answer:
respiration
Explanation:
Which best describes the Big Bang Theory?
A. Stars burn off their fuel, expand, and shed their shells.
B. Matter was compressed into a single point and then exploded
outward to form the universe.
C. A black hole exploded, creating stars.
Answer:
B
Explanation:
before the big bang there was a lot of nothing packed into nothing.matter and time. space and stars did not exist till then scientists haven't found a way yet to know what was there before the big bang, so we cannot say stars exploded or a black hole died. but what we can say is that very dense pinprick very very very very very dense pinprick of nothing-ness expanded and created matter as it heated up
Answer:
B
Explanation:
Our universe began with an explosion of space itself - the Big Bang. Starting from extremely high density and temperature, space expanded, the universe cooled, and the simplest elements formed. Gravity gradually drew matter together to form the first stars and the first galaxies.
An enzyme and four different molecules are
shown in the diagram below.
Enzyme
The enzyme would
most likely affect
reactions involving
a
A
B C D
Molecules
A molecule A, only
B molecule C, only
C molecules B and D
D molecules A and C
The question is incomplete but I attached the diagram here and it is likely that the enzyme affects reactions involving molecule C.
What is a chemical reaction?A chemical reaction is a process where molecules called reactants are converted into products.
An enzyme is a biological catalyst that shows specificity on one reactant, whereas molecules can be either reactants or products.
Enzymes are proteins that act as biological catalysts by speeding up the velocity of a chemical reaction.
In conclusion, the question is incomplete, but I attached the diagram and it is likely that the enzyme affects reactions involving molecule C..
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The organisms in the diagram below represent an energy pyramid. Which of the following best explains why the number of organisms at each level decreases while moving up the energy pyramid? A. The animals at higher levels are more competitive, so fewer animals survive. B. The animals at higher levels move more than the animals at lower levels, so they require more energy. C. The animals at each level use energy, so only a small amount of their energy is available to the next level. D. The animals at each level have more predators, so they produce more offspring.
Answer:
option #3
Explanation:
each tropic level gets only 10% of the energy from the thing it eats because that organism uses loses energy when it moves or by heat.