What theory’s/ideas challenge natural selection? In other words, what disproves natural selection?
Answer:
Natural selection needs some starting material, and that starting material is heritable variation. For natural selection to act on a feature, there must already be variation (differences among individuals) for that feature. Also, the differences have to be heritable, determined by the organisms' genes.
pls pls pls help
will mark brainliest
what happens with the relative positions of the Sun and the Moon in the sky?
Answer:
the moon and the sun line up above earth and sometimes creates eclipses.
Explanation:
I took the test. Please mark brainliest
Which of the following best describes a population?
Answer:
Explanation:
A number of things/people that populate on place
USE RACES: Why is a food web a better model for explaining energy flow
than a food chain?
Explanation:
Because it shows the relation of organisms with each other in a habitat, rather than just a small segment of it like a food chain. It is also still pretty easy to understand like a food chain.
Which statement about the structure of organic molecules is true
1. DNA contains fatty acid chain
2. Lipids are composed of Amino acids
3. Proteins are composed of nucleotides
4. Carbohydrates contain monosaccharide units
Answer: The answer is D
Explanation:
The statement which is true about the structure of organic molecules is as follows:
Carbohydrates contain monosaccharide units.Thus, the correct option for this question is D.
What do you mean by Organic molecules?Organic molecules may be defined as those molecules that are correspondingly made of carbon and hydrogen. It can also include other elements like oxygen, sulfur, nitrogen, etc. It must contain carbon atoms covalently bonded to hydrogen atoms (C-H bonds).
DNA possesses monomeric units known as nucleotides. Lipids are the derivatives of fatty acids. While proteins are composed of building blocks that are known as amino acids.
On the other hand, carbohydrates are derived from monosaccharide units that are togetherly held by glycosidic linkage.
Therefore, carbohydrates contain monosaccharide units is a statement that is true about the structure of organic molecules. Thus, the correct option for this question is D.
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pls help fast!!! thank you :))
Answer:
hydroelectric
Explanation:
took the test
Answer:
hydroelectric
Explanation:
Which is a common use of minerals?
A.pasta
B.toothpaste
C.applesauce
D.wooden craft stick
Answer: Toothpaste!!
Explanation:
Toothpaste commonly uses minerals like calcium and fluoride etc.
Hope this helps!!! :D
Answer:
The answer is B. toothpaste.
Explanation:
This is because toothpaste contains minerals like fluorid, and sometimes charcoal. I really hope this helps! If your reading this right now I hope you get a good grade and god bless you, your family, and friends! Happy Thanksgiving!✨
need rn! worth 13 ~ 謝謝
Help me with these two questions please !!!!!!!!!!!!!!
Answer:
Question 13: C
Question 14: D
Have a great day, hope this helps :)
In the Calvin cycle the conversion of energy poor carbon dioxide into energy rich glucose
A) atp is used
B) pyruvic acid is produced
C) oxygen is produced
D) nadph is made
Answer:
D)NADPH is made
A)ATP is used
Explanation:
Sorry to ask the two questions, I asked why the two options are in the process:Reduction. In the second stage, ATP and NADPH are used to convert the 3-PGA molecules into three-carbon sugar molecules, glyceraldehyde-3-phosphate ( G3P ). At this stage, it gets its name because NADPH donates, or reduces , electrons to a three-carbon intermediate to form G3P.[Ocultar detalhes]
The reduction stage of the Calvin cycle, which needs ATP and NADPH, converts 3-PGA (produced in the fixation stage) into a three-carbon sugar. This process takes place in two main stages:
Simplified diagram of the reduction step of the Calvin cycle showing the carbon atoms, but not the complete molecular structures. A 3-PGA molecule first receives a second phosphate group from ATP (generating ADP). Then, the doubly phosphorylated molecule receives electrons from NADPH and is reduced to form glyceraldehyde-3-phosphate. This reaction generates NADP + and also releases an inorganic phosphate.
Simplified diagram of the reduction step of the Calvin cycle showing the carbon atoms, but not the complete molecular structures. A 3-PGA molecule first receives a second phosphate group from ATP (generating ADP). Then, the doubly phosphorylated molecule receives electrons from NADPH and is reduced to form glyceraldehyde-3-phosphate. This reaction generates NADP + and also releases an inorganic phosphate.
First, each 3-PGA molecule receives a phosphate group from ATP, becoming a doubly phosphorylated molecule called 1,3-bisphosphoglyceride (and leaving an ADP as a by-product).
Second, 1,3-bisphosphoglycerate molecules are reduced (gain electrons). Each molecule receives two electrons from NADPH and loses one of its phosphate groups, becoming a three-carbon sugar called glyceraldehyde-3-phosphate (G3P) . This step produces NADP^+
+
start superscript, plus, end superscript and phosphate (\text P_iP
i
start text, P, end text, start subscript, i, end subscript) as by-products.
The chemical structures and real reactions are:
Reactions of the Calvin cycle reduction step, showing the molecular structures of the molecules involved.
Reactions of the Calvin cycle reduction step, showing the molecular structures of the molecules involved.
The ATP and NADPH used in these steps are products of the photo-dependent reactions (first stage of photosynthesis). That is, the chemical energy of ATP and the reducing potential of NADPH, both produced with the use of light energy, keep the Calvin cycle running. Conversely, the Calvin cycle regenerates ADP and NADP^+
+
start superscript, plus, end superscript, providing the necessary substrates for photo-dependent reactions.
Answer:
m
Explanation:
m
When a person eats the yogurt, the 14 grams of protein will be A combined into monosaccharides. B combined into polysaccharides. C broken down into amino acids. D broken down into nucleic acids.
Answer:
C broken down into amino acids.
Explanation:
Proteins are one of the four major biological molecules. They are organic polymers made up of monomers called AMINO ACIDS. Proteins are contained in food we ingest and are subsequently digested or broken down into their amino acid components.
In this case, when a person eats yogurt (containing proteins), the 14 grams of protein will be broken down into amino acids during digestion by enzymes called PROTEASES. Note that every polymer will be broken down into its monomeric constituents during digestion.
What characteristics apply to gymnosperms? (Choose all that apply)
use seeds to reproduce
use spores to reproduce
have vascular tissue
have cones as reproductive structures
Answer:
Have cones as reproductive structures.
Have vascular tissue.
Explanation:
The gymnosperms have vascular tissue and have cones as reproductive structures.
What are gymnosperms?The gymnosperms are woody like plants having a cone shaped structure, bear no flowers, no fruits but bear seeds; The seeds are with out coat and they are not covered by the fruit wall.
Gymnosperms produce seeds which are not enclosed in an ovary, while in Angiosperms the reproductive organs are the flower, they may involve in double fertilization resulting in a diploid zygote, and a triploid endosperm.
Gymnosperms produce seeds and fruits from their flowers, the flowers in gymnosperms helped in the propagation of the plants, it attract pollinators and attracted seed to dispersers, gymnosperms became dominant among plants.
The modification of the gymnosperm includes Modified leaves, Sunken stomata, Pointed and thick cuticle leaves, Less transpiration rate.
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Difference between direct and indirect effect
Direct effects, as the name suggests, while not manipulated or communicated by a third party, deal with the direct influence of one entity on another. Indirect effects can be described as the influence, mediated or passed on by a third, of one organism or species on another.
An enzyme acts as a catalyst to a chemical reaction by
Answer:
Speeding up chemical reactions by lowering the activation energy.
Explanation:
by lowering the activation energy
A large photograph displayed on a store’s website would NOT qualify for fair use under which guideline?
Answer:
copyright
Explanation:
A brown eyed person (BB) and a blue eyed person (bb) have several children. Which of these statements describe the probable eye color of their children?
1.All will have blue eyes
2.All will have brown eyes
3.Half will have brown eyes, and half will have blue eyes
4.Less than half will have brown eye
Answer:
2. B. All will have Brown Eyes
Explanation:
Brown is dominant, so all children will have Bb, brown eyes
Answer:
Im pretty sure theyll have brown eyes if not my bad
Explanation:
This illustration of a cell has a label. If there were no label, how could you tell that this cell is a plant cell and not an animal cell?
Group of answer choices
The cell has a nucleus.
The cell is surrounded by a cell membrane.
The cell is surrounded by a cell wall.
The cell contains cytoplasm.
Answer:
the cell is surrounded by a cell wall
Explanation:
only plant cells have a cell wall.
Answer:
The cell is surrounded by a cell wall
Explanation:
FIrst off, we can eliminate the first option because all cells have a nucleus.
Second off, all cells have a cell membrane, but animal cells DON'T have cell walls, which makes it option 3.
Finally, it's not "The cell contains cytoplasm due to both animal and plant cells having them.
Which of the following is not the wave of the future in the medical field?
O robots
O cameras
O computers
O engines
Please help!!!!!!
Helllpppp!!!!
How would the disappearance of shrimp, copepods, and amphipods affect the other organisms in the ocean food web
whats better
kirby
or
Zelda
franchise
Answer:
kirbyyyyyyyyyyyyy
Explanation:
:DDDDDD
Answer:
i think kirby bc he cyute <(^.^)^
Explanation:
zelda franchise for sum action and stuff
There are _____ levels of intellectual disabilities on the modern continuum.
A.
five
B.
four
C.
three
D.
two
Answer:
B) Four
Explanation:
There are four levels of intellectual disabilities on the modern continuum. The correct option is B.
What are intellectual disabilities?A person is said to have an intellectual disability when their capacity to learn at a typical rate and function in daily life is restricted. The severity of intellectual disability in children varies widely.
Despite the fact that a precise full-scale IQ test result is no longer necessary for diagnosis, standardised testing is nevertheless used to help make the diagnosis.
A full-scale IQ score of between 70 and 75 denotes a considerable intellectual functioning restriction.
Each person's level of difficulty with learning and processing information, difficulties with abstract cognition, and issues with social interaction are all common aspects of intellectual impairments.
On the contemporary continuum, there are four stages of intellectual disability.
Thus, the correct option is B.
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When a pinecone is open, it disperses its seeds. Based on your experiment, can you tell what weather conditions are needed for pine trees to release their seeds? Explain your answer.
Answer:
If a pine seed finds the right micro-climate, it will eventually sprout and a pine seedling will start to grow. However, pine seeds are usually released in a dormant state, which is most often broken by cold stratification. As a result, a pine seed will not sprout until the following spring when warm weather and some spring moisture are present.
Explanation:
hope it helps
Answer:
hi
Explanation:
The conversion of stored potential energy into kinetic energy can also be harnessed to power homes, factories and entire cities. Which example from the text supports this conclusion?
Answer:
The conversion of stored potential energy into kinetic energy can also be harnessed to power homes, factories and entire cities. The most notable example is the Hoover Dam. The Hoover Dam is an arch-gravity dam by design. This design name is the first clue as to how exactly the dam harnesses energy.
Two identical twins live in the same city; one smokes and one doesn’t. The one who smokes develops lung cancer. What is the best reason for this?
A.
mostly genetics factors
B.
genetics and environmental factors
C.
mostly environmental factors
D.
it was not related to their genetics or environment
Which of the following is created from amino acids linking together?
A. Carbon chains
B. Lipids
C. Polypeptide chains
D. Monomers
Give an example of how Eubacteria can be beneficial. Explain. Please help me.
Answer:
Some bacteria are good for you, including the bacteria in your digestive system, or gut. These bacteria help to break down food and keep you healthy. Other good bacteria can produce oxygen are used to create antibiotics. Bacteria are used in food production to make yogurt and fermented foods.
An example of how Eubacteria can be beneficial is that these bacteria fix nitrogen for soil that can be used by living beings.
What are eubacteria?The bacteria in your gut and digestive tract are among the beneficial bacteria. These microorganisms aid in the digestion of food and promote good health. To make antibiotics, other beneficial microorganisms that can also produce oxygen are employed. Yogurt and other fermented foods are produced using bacteria in the food industry.
Oxygen, carbon, nitrogen, and phosphorus that living things like animals and plants cannot use can be converted by eubacteria into usable forms. In the soil, they fix the nitrogen that is present in the air.
Therefore, Eubacteria can help the environment by fixing nitrogen into the soil so that living things can use it.
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Why might a company decide against using hydroelectric Energy as an alternative energy source
A. Gathering it requires pulling from unclean sources
B. Gathering it creates noise pollution for surrounding areas
C. Gathering it releases carbon dioxide gases into the air
D. Gathering it can have a negative affect on natural habitats
The company's decision against using hydroelectric Energy as an alternative energy source might be Gathering it can have a negative affect on natural habitats.
Why is hydroelectric power not a good energy source?Hydropower can also cause environmental and social problems. Waterholes drastically change the landscape and rivers they are built on. Dams and reservoirs can decrease river flows, raise the water temperature, degrade water quality and cause sediment to build up. This has negative impacts on fish, birds and other wildlife.
Thus, the correct option is "D".
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Which describes the process of a bacterial cell dividing to create two daughter cells? O binary fission O fertilization O meiosis gamete formation
What data did you use to answer this question?
Im sorry i dont see any question
Record the etymology of biometric
Define biometric, relating it to the etymology
Relate biometrics to identify thief
Explain the role that body systems, organs, cells or tissues play in identity
Answer:
Biometrics refer to measurements and different sort of calculations related to our body. For example their is Face ID and Fingerprint for their phones to know it’s actually them.
Relate biometrics to identify thief As hackers and identity thieves have gotten more sophisticated in their practices, a password alone may not be enough to keep all our personal information completely secure.
Explain the role that body systems, organs, cells or tissues play in identity
Cells contain the DNA that codes for proteins
Explanation:
