Chlorophyl absorbs the light at both endpoints of the visual expectrum, which means that ir absorbs the light of the blue and red wavelenghts.
The red wavelength is absorved on a higher rate than the blue wavelength.
What is theory in science means
Solution:
Scientists use conceptual processes to understand nature through questions or propositions.
The method on which scientific investigations are based is the scientific method and it is the hypothesis-prediction approach.
This approach allows scientists to modify their conclusions as new information becomes available.
The method consists of five steps:
1. Make observations
2. Ask questions
3. Form hypotheses, which are tentative answers to questions.
questions
4. Make predictions based on the hypotheses
5. Test the predictions by making additional observations or conducting experiments.
If the test results support the hypothesis, it is subjected to additional predictions and tests. If they continue to support it, confidence in its correctness increases and the hypothesis comes to be considered a theory.
Therefore, a theory is a demonstrable model supported by experimentation (empirical facts) and data that explains a phenomenon. In other words, a theory is a set of concepts, including abstractions of observable phenomena and quantifiable properties, along with rules that express the relationships between observations of those concepts.
the earth orbits the sun true or false
Earth rotate in an orbit around the sun. It takes 365 days, 6 hours, 9 minutes for the earth to complete its revolution around the sun. Its directional rotation to the sun is counterclockwise. Leap year is scheduled on the 6 hours, 9 minutes which is an additional 24 hour every fourth year.
Answer - True
In the figure, Side A is pure water and Side B is a 10% starch solution.
There is a semi-permeable membrane between the sides. Is this osmosis or simple diffusion? Why does the level in side B rise?
Water may pass readily across a semipermeable membrane, but solute cannot. Water travels to the solution side as the membrane divides pure water on the right from solution on the left. Osmosis is the cause of this water flow.
Why did water cross the permeable membrane from one side to the other?Osmosis is the net movement of water across a membrane that is permeable only to certain substances, and it is caused by the concentrations of different solutes on each side of the membrane.
Osmosis is the mechanism through which water diffuses across cell membranes. Osmosis is the process by which water moves from one region of low solute (dissolved material) concentration to another region of high solute concentration through a semipermeable membrane.
Osmosis is the process through which water diffuses across a semipermeable membrane based on the gradient of water concentration across the membrane. Osmosis simply moves water over a membrane, whereas diffusion moves materials both inside cells and across membranes.
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Of the most common cancers, which are the top 3 for 5-
year relative survival? Which are the bottom 3?
Answer:
Top 3 cancers for 5 years survival are:
1. Melanoma
2.Hodgkins lymphoma
3. Breast cancer
Bottom 3 cancers for 5 years survival are:
1. Mesothelioma
2.pancreatic cancer
3. Brain cancer
Explanation:
Prognosis describes how serious your cancer is and your chances of survival. 5-year survival means the percentage of people who will be alive 5 years after diagnosis.
Explain why humans need to eat food to survive and list the macronutrients needed in a healthy diet.
Food gives important nutrients to the human body. A healthy diet is vital for good health and nutrition. These nutrients are used for energy, cell growth, and repair. Food controls the immune system. Poor diets leads to various health problems. Food defends the human body from chronic noncommunicable diseases. Eating different kinds of food and taking less salt, sugar and saturated fats are needed for a healthy diet.
Macronutrients are consumed in large amount and carry the primary buliding blocks of our diet which are the protein, carbohydrates, and fat. These provides our body the energy it needed. Small doses of vitamins and minerals which are considered as macronutrients goes a long way.
The following are the 6 essential macronutrients:
1. protein
2. carbohydrates
3. fats
4. vitamins
5. minerals
6. water
I need help with this answer it’s a bit tricky
Correct option is number four, all current organisms share a common ancestor. Which is one of the backbones of its evolutionary thinking.
The 3 Basic Components of the Cell Theory were then complete:
The 3 postulates of the Cell Theory are:
-Every living being is composed of cells, therefore they are the minimal functional unit of life, in their different levels of structural complexity. One single
cell is enough to make up an organism, but also multiple cells can organize in colonies or in a single organism, diversifying their functions and having a margin of independence quite elevated as a whole.
-All of the vital functions of living organisms have a place inside the cell, through biochemical processes and are controlled by substances that the cell secrete. Each cell operates as a unique open system, that exchanges matter, and energy with its environment in a controlled way. Moreover, in each cell of an organism are present the same vital functions that are in the organism itself, that is birth, growth, reproduction, and death.
-Every existing cell comes from a previous cell, by cell division, or by formation from stem cells.
pls help i’m so confused
Punnent square for breeding of female chocolate lab (bbEE) with male black lab (BbEE) the cross as follows:
be bE bE bE
BE BbEe BbEE BbEE BbEE
BE BbEe BbEE BbEE BbEE
bE bbEe bbEE bbEE bbEE
bE bbEe bbEE bbEE bbEE
What is breeding?breeding is a genetic concepts are applied in animal husbandry, agriculture, and horticulture. By selectively cultivating different plants, early farmers enhanced many of them. Pollination is the key component of modern plant reproduction, only the chosen male parent's pollen can be transported to the selected female parent.
There are three different breeds
Cross-breeding: mating between individuals from various breeds or lines. Pure breeding is the mating of members of the same breed or line. Inbreeding: When two relatives get together.Breeding is essential for improving traits that can improve the quality of life for people all around the world, including resilience to diseases and pests, drought, and temperature extremes.
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A disadvantage of asexual reproduction is that offspring _______. A. may not be as able to respond to and survive changes B. have a greater chance of getting harmful genes C. receive more variability in genes from a single parent D. inherit a mix of two parent’s genetic information
Answer:
the offspring are genetic clones and there is lack of genetic variation among the offspring.
Explanation:
Mr. Cantrell's science class is conducting an investigation to observe the differences between plant and animal cell organelles. The students will observe an onion cell under one microscope, and an animal cell under another microscope. What should students observe as being similar in the onion cell slide and the animal cell slide?
A. Both cell types have a nucleus.
B. Both cell types have a rigid cell wall.
C. Both cell types have large vacuoles.
Question 3 of 10Which of the following accurately describes a trade-off of using biomass as afuel?aA. Biomass produces no air or water pollution but is expensive tocollectB. Biomass is inexpensive but nonrenewable.C. Biomass is easy to produce but generates radioactive waste.D. Biomass is inexpensive and easy to produce but generates airpollution
The correct option is D. Biomass is inexpensive and easy to produce but generates air
pollution. Biomass burning might generate carbon dioxide, among other gases, which would counterattack the climate change goals, such as carbon dioxide mitigation.
Which is the most inclusive division of time on the geologic time scale?A. epochB. periodC. eraD. eon
The most inclusive division of time is the eon, which can be Archean, Proterozoic, Phanerozoic and they are divided into eras (Early/Middle/Late for the Archean and Proterozoic, Paleozoic, Mesozoic and Cenozoic for the Phanerozoic). Therefore, the correct answer is D. eon.
Question: Use the image to explain how ATP provides energy to your body
The image shows the process of photosynthesis where conversion of light energy to chemical energy took place by cellular respiration thereby releasing sugar in the form of glucose to provide food to plants and other organisms. ATP is produced by glycolysis and electron transport chain which serves as the energy currency of a cell which are synthesized by the mitochondria.
The image shows a representation of the carbon cycle that could also be related to our human body as well. From the image, it shows that sugar are formed by plants using carbon dioxide and the energy from the sun which can develop for their own nutrients. The process of photosynthesis where conversion of light energy to chemical energy took place by cellular respiration thereby releasing sugar in the form of glucose to provide food to plants and other organisms. When animals, even human beings consumes sugar and they can break them in ATP, which is a molecule that contains energy, can be used in multiple processes. ATP is produced by glycolysis and electron transport chain which serves as the energy currency of a cell which are synthesized by the mitochondria. The chlorophyll entagle the energy from the sun and modify it into chemical energy in the form of ATP.
I need help with this practice problem solving The subject is the invasive speciesKudzu Review the pic, the answer^
Answer
Kudzu kills native plants by smothering them and blocking their sunlight. Climbing vines can girdle trees, and their weight can uproot trees. Loss of trees and plants to kudzu threatens agricultural and timber production. Kudzu would destroy the native species. Few plants can survive once smothered by kudzu and small ecosystems can be radically altered. Infestations quickly spread in open habitats, rapidly covering the soil and low growing vegetation, and only slowed by adjoining forests. Kudzu can affect indigenous plants and completely modify the structure of the ecosystem.
Kudzu is widely believed to drastically reduce biodiversity because of its ability to smother other vegetation and develop large-scale monocultures. It can climb overtop and subsequently kill new seedlings or mature trees. Forestry problems associated with aggressive vines such as kudzu include mortality of edge trees, exclusion of native plant species, and potential to increase fire hazard during winter.
1. Correct the following paragraph describing pigments, energy and photons.
Photons are the particle that makes up light. Photons with a longer wavelength of light have more energy than photons with a shorter wavelength. Pigments can only absorb photons that have the exact amount of energy required to move
an electron to a higher energy state. If a photon's energy doesn't match exactly, the photon is absorbed. Most plants
have one kind of pigment in their leaves. If a pigment is red, it absorbs only photons with a red wavelength.
2. Correct the following describing the light dependent reactions of photosynthesis.
The first photosystem is photosystem II. In this photosystem, photons are absorbed by pigments in the antenna complex and the energy is used to create an electron at the reaction center. This excited electron is then given to ADP.
The electron carrier is then reduced which provides energy for the electron transport chain to pump H+ ions into the chloroplast stroma. Then, H+ flows through ATP synthase to power the reaction of ATP - ADP + P. The electron that
left the reaction center is replaced through condensation of a water molecule into oxygen and nitrogen. The second photosystem is photosystem I. In this photosystem, photons are absorbed by pigments in the antenna complex and the energy is used to re-excite the low-energy electron from photosystem II at the reaction center. This excited electron is then used to oxidize NADP+ into NADPH.
1. Light has two personalities. Light acts primarily as a wave, but it may also be thought of as a collection of tiny bundles of energy known as photons. If a pigment is red, it absorbs photons of different wavelengths while reflecting photons of the same wavelength.
2. Photosystems, which are huge complexes of proteins and pigments (light-absorbing molecules) that are tuned for light harvesting, play an important part in light reactions. Photosystems are classified into two types: photosystem I (PSI) and photosystem II (PSII).
How to illustrate the information?1 A photon is an electromagnetic energy packet. It is the fundamental unit of all light. The photon is also known as a "quantum" of electromagnetic energy. A photon's energy is proportional to its wavelength: longer wavelength photons have less energy, while shorter wavelength photons have more.
2 Light energy is used in light-dependent reactions to create two molecules required for the next step of photosynthesis: the energy store molecule ATP and the reduced electron transporter NADPH. Light reactions occur in the thylakoid membranes of chloroplast organelles in plants.
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In the ocean aquatic creatures who are photosynthetic are found in the ____________ zone.Question 1 options:sublittoralabyssalnone of the above
The region in the ocean that marine creatures are capable to do photosynthesis is the photic area, part of the photic area is in the neritic portion where is found the litoral and the sublittoral, being the sublittoral next to the epipelagic and pelagic zones. Therefore, between the alternatives the one that talks about a region where protosynthetic organisms are found is the sublittoral, that's because less light to none can be available in deeper regions of the ocean, and the abyssal layer is the last in the model of ocean distribution layers.
Why are fossils important to developing a theory of evolution?
Which is the best definition of activation energy?
A) the energy required to end a chemical reaction
B) the energy required to bind a substrate to an active site
C) the energy required to form or break the bonds of reactant molecules
D) the energy required to re-form bonds in product molecules
Activation energy is the energy required to form or break the bonds of reactant molecules (option C).
What is activation energy?Activation energy of a chemical reaction is the energy required to initiate a reaction.
For example, the flame from the fuse of a firecracker provides a small initial amount of energy, after which the explosive reaction proceeds by itself, releasing a considerably larger quantity of energy.
The activation energy of a chemical reaction is strictly required to make a reaction occur i.e. conversion of reactants to products.
Therefore, the energy needed to break the chemical bonds of a reactant molecule is the activation energy.
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Hello I need help with this practice problem solving In your own words, shortly answer my pic above
The harmfully invasive Kudzu was introduced in the U.S. during the Philadelphia Centennial Exposition in 1876 where it was presented for sale as a green ornamental plant.
Kudzu is a green sturdy vine that is a climber. It is known for its sweet-smelling blooms. It is harmfully invasive because it poses great competition for the native plant, from grasses to large trees, and outcompetes them all by shading them and depleting them with their share of sunlight.
Ornamental plants are those that are grown for the purpose of decoration. These can be grown in gardens, fields or even indoors. Some examples of ornamental plants are: Snake Plant, String Of Pearls, Peace Lily, Chinese Money Plant, Air Plant and Water Bamboo.
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Kudzu is an autotroph, denoting that it makes its own food from…Finish the sentence ^^ with the best estimated answer
Autotrophs are organisms that make their own food, making biomolecules using simple abiotic carbon compounds, such as carbon dioxide, and energy from light (photosynthesis) or from inorganic chemical reactions (chemosynthesis).
So, we could complete the question with "abiotic carbon compounds and light energy"
HELP ME PLEASE
In what types of food is the protein content the highest?
Answer:
According to the WebMD, seafood, lean beef (including tenderloin, sirloin, and eye of round) and lean pork, eggs, beans, and low-fat dairy products have the highest protein content.
Standard NCES.7.L.2.2-Two tall plants (homozygous dominant) are crossed. What are the expected phenotypes of the offspring?
Group of answer choices
all short plants
all tall plants
some tall plants and some short plants
one tall plant and the rest short plants
What is the meaning of life?
Answer:
The meaning of life is to positively influence as many of the lives around you as possible.
Explanation:
Some people begin to feel a sense of dread when thinking about how little space they take up, and how long they will be alive, because it seems quite small and meaningless in the grand scheme of things.
That, however, is a result of the human brain rationalizing the value and worth of something by how long it exists and how much space it takes up. In reality, something does not need to take up much space, or exist for very long, in order to be worthy and meaningful.
For instance, a hamster is very small and may live only three years before passing of old age. However, if that hamster made a person happy — filled them with joy every day when they arrived home, gave them a reason to get out of bed even when they didn't feel like it, gave them the feeling of love even while being isolated — then it had a very, very meaningful existence.
Humans are very small, and we exist for very short amounts of time, but we have the power to feel and love and change our surroundings, and as long as we leave behind a legacy of even one smile, or even one life saved (no matter how small - a lizard, perhaps), or even one moment of hope, then we will have fulfilled our purpose, and that is all we could ever ask for.
6. What is the monomer (building block) of nucleic acids such as DNA and RNA a.Nucleotidesb.Amino Acidsc.Glycerol head and fatty acid tailsd.Monosaccharide
We have to consider that a monomer is, just like the question's statement tells us, the building block of a greater molecule. These basal units in the nucleic acids (DNA and RNA) are known as nucleotides, while are called amino acids in proteins.
Cognitive Development
what is a colony forming unit and how is it used to infer microbial numbers in a sample?
Explanation:
A colony forming unit, or CFU, is a unit commonly used to estimate the concentration of microorganisms in a test sample. The number of visible colonies (CFU) present on an agar plate can be multiplied by the dilution factor to provide a CFU/ml result.
A measure of the quantity of viable colonogenic cells per milliliter is called a colony forming unit (CFU). These give an idea of how many cells are still alive and able to divide and create small colonies.
What are the colony forming unit and infer microbial?Colony-forming unit (CFU, cfu, or CFU) is a unit used in microbiology to measure the number of viable microorganisms (bacteria, fungi, viruses, etc.) in a sample that can multiply through binary fission under controlled conditions.
Colony forming units, or CFUs, are frequently used to calculate the number of microorganisms present in a test sample.
A CFU/ml result can be obtained by multiplying the number of visible colonies (CFU) present on an agar plate by the dilution factor.
Therefore, A colony forming unit, or CFU, is a unit commonly used to estimate the concentration of microorganisms in a test sample.
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Photosynthesis, What goes in, What goes out, and Where within the cell does it occur?
Photosynthesis is the course where plants utilize sunlight, H20, and CO2 to build O2 and energy in the form of sugar.
In the course of photosynthesis, plants take in CO2 and H20 from the air and soil. Inside the plant cell, the H20 is degenerated or give up electrons, at the same time the CO2 is decreased or avails electrons. This converts the H20 into O2 and the C02 into glucose. The plant then discharges the O2 back into the air, and stock energy within the glucose molecules.
Photosynthesis takes place in small organelles called chloroplasts that stock the energy of sunlight. The chloroplasts contain the chlorophyll which is the primary pigment utilized in photosynthesis. The chloroplasts are enclosed by a double membrane and consist of a third inner membrane called thylakoid membrane that builds long folds within the organelle.
Answer - What goes in - CO2 and H20
What goes out - O2 and sugar
Where it occur - sunlight
The light reactions of photosynthesis takes place in the thylakoid membranes of the chloroplast. The light reactions catch energy from the sunlight which they alter to chemical energy and stock in molecules of NADPH and ATP.
Which is not part of a myofibril?A) Muscle cellB) SarcomeresC) MyosinD) Actin
Answer:
A) Muscle cell
Explanation:
The myofibril has the following parts, sarcomeres, actin, myosin etc...
The part that is NOT part of a myofibril is Muscle cell, but it does have a muscle fiber.
Identify the neurons that are nerve cells that carry information between sensory and motor neuronsOptions Sensory neurons Interneurons Motor neurons
Interneurons are responsible for connecting sensor neurons and motor neurons by transferring signals and communicating with each other.
What is the relationship between land-use in general and deforestation
The use of land and deforestation historically have been connected since the beginning of human civilization, and when our species started to conquer new areas. Firstly for their establishment, and the production of crops of different plants for food. Currently, that's a continuous fact, mainly because of the increase of the human worldwide population.