Answer: Adenine
Explanation:
The structure of the DNA double helix is complex in nature. There are two strands of DNA that are wound around each other. The nitrogenous bases are bonded with hydrogen bonding and base complementarity. According to the Chargaff's rule of base complementarity adenine always pairs with the thymine and guanine with cytosine. These nitrogenous bases are paired on the basis of hydrogen bonding. Adenine bonded with thymine through two hydrogen bonds whereas the cytosine pairs with guanine via three hydrogen bonds. During DNA denaturation these hydrogen bonds are broken whereas during DNA replication these hydrogen bonds are formed between the nitrogenous bases.
Deco cubes with 3 types of solutions science
Answer:
Below
Explanation:
Deco cubes with 3 types of solutions sciences
Answer:
owwwwweeeaaaa my god!
Explanation:
Plant cells also gain energy through cellular respiration. True False sm
Answer:
true
Explanation:
I WILL GIVE BRAINLIEST PLEASE HELP, DUE IN 30 MINUTES
Fill in the blanks:
Law of Segregation: Mendelian principle explaining that because each plant has ___ different alleles it can produce __ different types of __. During fertilization, male and female gametes randomly __ to produce four combinations of alleles.
Word Bank: (picture below)
Answer:
I think it goes like this:
Explanation:
Law of Segregation: Mendelian principle explaining that because each plant has 2 different alleles it can produce 2 different types of genes. During fertilization, male and female gametes randomly pair up to produce four combinations of alleles.
i need help with this bio question
Answer:
its C
Explanation:
Please help me with this
The Port of Toronto is one of the largest inland ports in Canada. It is part of the system of marine traffic. Commercial and recreational boats are part of this system. What is the input of this system? What is the output? Name a subsystem you can identify for this system?
Answer:
the answer is D
Explanation:
The following statement from the video suggests the use of which standard of of science to assess RELIABILITY?
"Simulation experiments can not tell us exactly how life formed in the past, but if
enough of them are done it could eventually tell us if it's possible for life to emerge
from chemistry"
O Replication of Results
O Sufficient Sample Size
O Empirical & Measurable Evidence
O Concept of Falsification
Answer:
I think it’s C Empirical & Measurable Evidence
Explanation:
...
Answer: c
Explanation:
I took the test
Hydrophobic interactions are the basis for Sudan tests. Explain how hydrocarbons in lipids interact with polar surroundings
Answer and Explanation:
Lipids are non-polar molecules, so they do not interact preferentially with polar molecules but they can interact with each other. In a polar medium, such as water, the hydrocarbons in lipids aggregate each other, in order to minimize contact with surrounding polar molecules. The interaction between non-polar solutes with polar surroundings exclusion is called hydrophobic interaction.
A farmer wants to produce sweeter grapes using artificial selection. Which of these strategies can he use to achieve this goal?
Answer:
Crossbreed the two sweetest vines in the vineyard to produce new plants.
Explanation:
Artificial selection is the method used by the humans to produce traits in plants and animals according to teh desired thought. In this process of evolution, desirable characteristics of plants and animals are reproduced.
In the given excerpt, the farmer can adopt the method of crossbreeding two vines which are sweetest in order to produce sweeter grapes.
The effect of disorder of checkpoints proteins and cell cycle regulation
I need help!!!!!!???
Answer:
LEARNING OBJECTIVES
Identify important checkpoints in cell division
Explain how errors in cell division are related to cancer
The length of the cell cycle is highly variable, even within the cells of a single organism. In humans, the frequency of cell turnover ranges from a few hours in early embryonic development, to an average of two to five days for epithelial cells, and to an entire human lifetime spent in G0 by specialized cells, such as cortical neurons or cardiac muscle cells. There is also variation in the time that a cell spends in each phase of the cell cycle. When fast-dividing mammalian cells are grown in culture (outside the body under optimal growing conditions), the length of the cycle is about 24 hours. In rapidly dividing human cells with a 24-hour cell cycle, the G1 phase lasts approximately nine hours, the S phase lasts 10 hours, the G2 phase lasts about four and one-half hours, and the M phase lasts approximately one-half hour. In early embryos of fruit flies, the cell cycle is completed in about eight minutes. The timing of events in the cell cycle is controlled by mechanisms that are both internal and external to the cell.
Explanation:
Regulation of the Cell Cycle by External Events
Both the initiation and inhibition of cell division are triggered by events external to the cell when it is about to begin the replication process. An event may be as simple as the death of a nearby cell or as sweeping as the release of growth-promoting hormones, such as human growth hormone (HGH). A lack of HGH can inhibit cell division, resulting in dwarfism, whereas too much HGH can result in gigantism. Crowding of cells can also inhibit cell division. Another factor that can initiate cell division is the size of the cell; as a cell grows, it becomes inefficient due to its decreasing surface-to-volume ratio. The solution to this problem is to divide.
Whatever the source of the message, the cell receives the signal, and a series of events within the cell allows it to proceed into interphase. Moving forward from this initiation point, every parameter required during each cell cycle phase must be met or the cycle cannot progress.
Regulation at Internal Checkpoints
It is essential that the daughter cells produced be exact duplicates of the parent cell. Mistakes in the duplication or distribution of the chromosomes lead to mutations that may be passed forward to every new cell produced from an abnormal cell. To prevent a compromised cell from continuing to divide, there are internal control mechanisms that operate at three main cell cycle checkpoints. A checkpoint is one of several points in the eukaryotic cell cycle at which the progression of a cell to the next stage in the cycle can be halted until conditions are favorable. These checkpoints occur near the end of G1, at the G2/M transition, and during metaphase
plz mark me as brainleast my friend
1. Which of the following is NOT one of the Earth's systems?
A Hemisphere
B Biosphere
C Atmosphere
D. Hydrosphere
A. Hemisphere
..................
Answer:
B.Biosphere
Biosphere, relatively thin life-supporting stratum of Earth's surface, extending from a few kilometres into the atmosphere to the deep-sea vents of the ocean. The biosphere is a global ecosystem composed of living organisms (biota) and the abiotic (nonliving) factors from which they derive energy and nutrients.
Explanation:
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I need help with 1,2,4,5,6, and 7. I already did 3 :)
Answer:
Answers, in order:
40, Temperature steeply decreases, 2, Effect decreases steeply, 5 and 9, 10
SOMEONE PLEASE HELP ME WITH THIS I REALLY REALLY REALLYYY NEED IT ILL GIVE BRAINLY IF U GET IT RIGHT
Answer:
i like trains and turtles
Explanation:
how does understanding cell reproduction allow scientists to generate organs and tissues in the laboratory.
PLEASE ANSWER ALL QUESTIONS! THANKS!
Which of the following statements about salinity is true?
Question 1 options:
Ocean water near areas with low evaporation has higher salinity.
Ocean water in regions with high levels of precipitation has higher salinity.
Ocean water near rivers has a lower salinity.
Ocean water in areas with high humidity has a higher salinity
How are latitude and temperature related?
Question 2 options:
Lower latitudes will have warmer water because it is closer to the equator.
Higher latitudes will have warmer water because it is closer to the equator.
Higher latitudes will have warmer water because it is closer to the poles.
Lower latitudes will have warmer water because it is closer to the poles
How does salinity vary with freezing and melting?
Question 3 options:
Both freezing and melting decrease salinity.
Both freezing and melting increase salinity.
Freezing decreases salinity, while melting increases salinity.
Freezing increases salinity, while melting decreases salinity.
How does salinity vary with evaporation?
Question 4 options:
When water evaporates, it takes salt with it, increasing its salinity.
When water evaporates, it leaves salt behind, increasing its salinity.
When water evaporates, it leaves salt behind, decreasing its salinity.
When water evaporates, it takes salt with it, decreasing its salinity.
Answer:
that guys answers are all wrong except for #3
Explanation:
i took the quiz and got 1/4
Grace and Carlos are going for a walk the temperature is -15°C with wins at 10 to 12 mph what should I wear
3. The picture on the right shows the sequence of nitrogen bases on part
of a DNA strand. Which string of letters below represents the nitrogen
bases in the order they would pair up with this part of the DNA strand?
A. C-T-G-C-A
B. G-A-C-G-T
C. A-G-T-A-C
(the picture is T-C-A-T-G)
Answer: C
Explanation: Thymine pairs with Adenine and Cytosine pairs with Guanine.
Help please -thanks!
Answer:
It is D
this shows that there was likely greater diversity during the time that is represented by that rock layer
it could also be random chance that those fossils ended up being fossilized in that location as fossilization is a random and rare occurence so this is usually corraborated with multiple locations
also remember that a mass extinction event can fit within as large of a window as over 100k years because dating isn't bang on and a large cataclysmic even could take a long time for it to effect the whole planet enough to cause a mass extinction
Explanation:
It is D
Because it shows that there was a greater diversity during the time that is represented by that rock layer , it could also be random chance that those fossils ended up being fossilized in that location as fossilization is a random and rare occurence so this is usually corraborated with multiple locations
Recessive traits are...
visible in the organism's phenotype as long as TWO recessive traits are present.
visible in the organism's phenotype as long as ONE recessive trait is present.
If the action force is a player kicking a soccer ball, then what is the reaction force? the ball accelerating in the direction of the kick the ball moving at a constant speed in the direction of the kick the ball accelerating in the opposite direction of the kick the ball pushing on the player in the opposite direction of the kick
Answer:
the ball accelerating in the direction of the kick
Explain the change of color that often occurs in leaves in the autumn in simple terms.
Answer:
In autumn when it starts to get cold, some plants stop making chlorophyll. Instead, those plants break down chlorophyll into smaller molecules. As chlorophyll goes away, other pigments start to show their colors. This is why leaves turn yellow or red in fall.
Explanation:
How is passive transport different from active transport?
A) Passive transport is substances moving from HIGH concentration to LOW concentration.
B) Passive transport requires energy input.
C)Passive transport happens regardless of concentration gradient.
D) Passive transport is substances moving from LOW concentration to HIGH concentration.
ASAP
Answer:
A
Explanation:
Passive transport does not require energy. The substances follow the concentration gradient, meaning they go from high to low. Active transport goes against the concentration gradient. Substances go from low to high, so it requires energy.
most common type of arch, loop and whorl?
Answer:
yes
Explanation:
most common pattern being found in 65 to 70 percent of all fingerprints
Which diagram shows photosynthesis with the correct reactants and products?
answer:
B
explain:
i did the test:))
Answer:c
Explanation:
HELPP
The diagram below shows the similarities and differences of plants and animals complete the diagram by filling in the correct term as follows: heterotrophic and autotrophic and multicellular
Answer:
Both are multicellular (plants have different cells for the leaves and the stem, animals have skin cells, brain cells etc so they are called multicellular).
Plants are autotrophic - they make their own food (glucose) by photosynthesis
Animals are heterotrophic - they eat other organisms, cannot make their own food.
Explanation:
II. Which animal is the top predator in many wetlands?
A. Raccoons
B. Alligators
C. Snakes
D Owls
Answer:
b. n kkhghiuttyytrftghjiutew
2. A food web explains why there are more _____. It is because more energy is available to _____. A. Decomposers than consumers / consumers b. Producers than decomposers / consumers c. Consumers than producers / producers d. Producers than consumers / producers
Answer:
D
Explanation:
A food web explains why there are more producers than consumers. It is because more energy is available to producers.
The food web is a structural representation of the feeding relationship that exists among the living organisms in a particular environment.
A typical food web groups living organisms as producers, consumers, or decomposers. Producers are those that fix sunlight energy into chemical energy, a process known as photosynthesis while consumers are those that either feed on producers or other living organisms in the environment. The decomposers return both producers and consumers back to the earth and help nutrients circulate in the environment.
In a typical food web, producers are usually more than consumers because more energy is usually available at this level. Less and less energy becomes available as we move up the ladder in each food chain that makes up the food web.
The correct option is D.
Explain how the use of genetically engineered
products can affect the economy and society.
Which of the following is NOT included in a soil survey?
O Maps with soil boundaries and photos
O Tables of soil quality and type needed for certain uses
O Tables of soil properties and features
O Descriptions of soils in the area
Answer:
Soil survey, or soil mapping, is the process of classifying soil types and other soil properties in a given area and geo-encoding such information. ... An architect or engineer might use the engineering properties of a soil to determine whether or not it was suitable for a certain type of construction.
Estimate the number of cells that belong to each phase of the cell cycle. Then, explain how you made your decision and describe what occurs at each phase of mitosis.
Answer:
well, it starts from one parent cell, every complete phase makes. at least 4 and then i. think those can multiply
Explanation:
