Explanation:
Adenine always pairs with thyamine or uracil also.
Cytosine always pairs with guanine
Hope this helps!!
Answer:
first one is thyamine
the second one is guanine
Explanation:
What features do we find only in the cells of bacteria?
What features do we find only in the cells of animals?
What features do we find only in the cells of plants?
Answer:
In bacteria cells, you would find pili (only found in bacteria and archaea) and DNA not contained in a nuclear envelope/nucleus. These are, for the majority, exclusively found in bacteria cells.
In animal cells, you would find lysosomes and centrosomes. These organelles are exclusively found in animal cells.
In plant cells, you would find plastids, such as chloroplasts or amyloplasts. More specifically, chloroplasts are exclusively found in plant cells as they are necessary for photosynthesis to occur.
What is light dependent stage?
Answer:
In photosynthesis, the light-dependent reactions take place on the thylakoid membranes. The inside of the thylakoid membrane is called the lumen, and outside the thylakoid membrane is the stroma, where the light-independent reactions take place.
The human body is composed of cells, organs, organ systems, and tissues. How are these organized?
A) Groups of cells form tissues.
B) Groups of organs form tissues.
C) Groups of organ systems form tissues.
D) Groups of tissues form organ systems.
PLZ HELP
Answer:
C) Groups of organ systems form tissues.
Explanation:
in order to perform, a chemist needs an element that has similar properties to potassium (K) but has a lower atomic mass. which element should the chemist select for the experiment?
A. Robidium (Rb)
B. Sodium(Na)
C. Magnesium(Mg)
D. Calcium(Ca)
The element needed by the chemist to perform the experiment with similar properties to that of potassium, while having lower atomic mass is option B. Sodium.
If we take a look at the periodic table, we can see all the elements that share properties with potassium are located within the same column. Some examples are :
SodiumRubidiumCesium LithiumOf the elements listed, only two are found within the options for this question, which means that we can discard option C and D.
We can then proceed to analyze the atomic mass of each element in an attempt to choose the option with a lower atomic mass than Potassium. Option A, Rubidium, has an atomic mass that is much higher than the 39 of potassium, which means we can discard option A. The correct choice is option B, Sodium , since it shares similar properties and has an atomic mass of 22.
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I heard that Bloodtype O is strong to the malaria virus. Can someone tell me why is that? I need direct sources for the information. Thank you.
Answer:
With neither A or B antigens, this blood group has different receptors on its red blood cells, and these are not as easily taken over by malaria. "Hence, rosettes formed in blood group O [red blood cells] tend to be smaller, weaker and more unstable," the authors write in the new review
Explanation:
2 What time of year would you visit the beaches of Argentina?
Answer:
To visit Argentina's beaches, remember that the seasons are reversed in the southern hemisphere; summer is from December to February, while winter is July through September. The best time of year to visit depends on where you go, what you want to do and whether you want to avoid the crowds
Which of the following terms are used to indicate that cell membranes will allow only certain molecules to pass through without assistance?
A. Selective Permeability
B. Open Bilayer
C. Homeostatic Membrane
D. Temporary Permeability
The plasma membrane separates the cell from the outer environment. It only allows the movement of certain molecules through selective permeability. Thus, option A is correct.
What is selective permeability?Selective permeability is the property that allows the movement and transportation of the molecules inside the cell through active or passive transportation.
It is seen in the plasma or the cell membrane of the cell as it allows only certain specific molecules to enter or leave the cell. It is important for the protection of the cell.
This allows the exchange of the nutrients and waste produced in and out of the cell. The selective permeability is the semi-permeability that is due to the lipid bilayer of the membrane.
Therefore, option A. the cell membranes are selectively permeable.
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Metalloids that can conduct electricity at high temperatures are
called
Metalloids that can conduct electricity at high temperatures are called semiconductors.
Semiconductors are a group of elements that have properties intermediate between those of metals and nonmetals. They have some characteristics of metals, such as being able to conduct electricity, but also some characteristics of nonmetals, such as having lower conductivity than metals.
At low temperatures, semiconductors have very low conductivity. However, at high temperatures, they can conduct electricity more effectively. This is because at higher temperatures, the thermal energy causes more electrons to break free from their atoms and become available for conduction.
One example of a semiconductor that can conduct electricity at high temperatures is silicon. Silicon is widely used in electronic devices, such as computer chips and solar cells, due to its ability to control and amplify electrical signals.
In summary, metalloids that can conduct electricity at high temperatures are known as semiconductors. They have properties intermediate between metals and nonmetals and can conduct electricity more effectively at high temperatures. Silicon is an example of a semiconductor commonly used in electronic devices.
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5. A system of membranes and tubes that create
passages through which materials can pass? |
Answer:
paper or glass
Explanation:
for they use needles to get and they transfer it to paper for studying
Answer: paper
Explanation:
PLEASE HELP ME Are humans predators in their ecosystem? Explain in at least 5 sentences.
Their new study shows that humans are strange predators. Unlike other animals, we target adult prey in large numbers. That is a practice that can push populations of those prey into decline, the researchers warn. People mainly target — at least among wild mammals and fishes — prey that are old enough to reproduce.
Humans are considered to be apex predators in their ecosystems due to their ability to manipulate and dominate other species through hunting, agriculture and urbanization.
Why are human predators?Humans are considered to be apex predators in their ecosystem due to their ability to manipulate and change their environment to suit their needs. Humans have the ability to hunt and consume a wide variety of other organisms, including other predators. Humans also have a significant impact on the environment through activities such as deforestation, pollution, and hunting.
However, humans are also capable of acting as stewards of the environment and preserving biodiversity through conservation efforts. The relationship between humans and their ecosystem is complex and multifaceted.
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6.) A dog named Rascal leaves his home and travels a short distance and
then returns home. The graph shows his position as a function of time.
How does his velocity on his return trip compare to his velocity for the
first 5 seconds?
Answer:
If your on USA testprep then the correct answer is D !
Explanation:
Answer:
THE CORRECT ANSWER IS: His velocity on the return trip was twice as fast when compared to the first 5 seconds.
Explanation:
Gim kit
If convection cells in the asthenosphere are the mechanism behind plate tectonic movement, what powers the convection cells?
a) energy from the sun
b) energy from the earth's core
c) air pressure changes
d) energy from magma
The energy that powers the convection cells is ENERGY from the earth's core (Option B).
Convection currents, also known as convection cells, are caused by density differences within a body of liquid or gas. Convection cells inside of the Earth form as material near the Earth's core heats up.The asthenosphere refers to the upper mantle layer beneath the lithospheric mantle which is involved in plate tectonic movement.The heat inside the Earth's core heats the asthenosphere, which is associated with the movement or 'motion' of convection cells.In conclusion, the energy that powers the convection cells is ENERGY from the earth's core (Option B is correct).
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Explain the process of DNA isolation.
Answer:
Lysis, precipitation and purification
Explanation:
DNA isolation is a molecular biology technique based on the extraction of DNA and subsequent purification to remove inhibitors that may hamper the process of amplification. DNA isolation consists of three steps:
1- Lysis: it consists of the mechanical disruption of the cell, where the nucleus is broken to release DNA. During this process, it is required to use enzymes and detergents such as Proteinase K
2- Precipitation: during this process, the DNA is precipitated by using alcohol and salt.
3- Purification: this process removes the impurities from DNA. Extraction is carried out by washing DNA with ethanol and water.
two or more functions that must occur
inside of our body so that we stay alive.
Answer:
hope this helps u
Explanation:
These many functions can be summarized in terms of a few that we might consider definitive of human life: organization, metabolism, responsiveness, movement, development, and reproduction.
In eukaryotic organisms, genes usually consist of two alleles. The two alleles are often on different parts of the same chromosome.
These sentences contain incorrect information. Which option describes the mistake?
Answer:
what are the options? need more info
Choose all the answers that apply.
Muscles in the small intestine are _____.
smooth
striated
involuntary
voluntary
cardiac
Pls pick multiple
Answer:
smooth and involuntary
Two layers of smooth muscle form the small intestine. The outermost layer is the thin, longitudinal muscle that contracts, relaxes, shortens, and lengthens the gut allowing food to move in one direction. The innermost layer is a thicker, circular muscle.
Also smooth muscle is not under our control so is called involuntary
Which of the following is false
1. Cells form tissues
2. Tissues for organ systems
3. Organs form organ systems
Answer:
2 is false
Explanation:
tissues don't form organ systems
what do both plant cells and animals cells have in common?
Answer:
Explanation:
Animal cells and plant cells share the common components of a nucleus, cytoplasm, mitochondria and a cell membrane. Plant cells have three extra components, a vacuole, chloroplast and a cell wall.
Answer:
Nucleus, nucleolus, cell membrane, ribosomes, cytoplasm, vacuole, mitochondria, golgi complex
Identify the structures. Please ASAP
Answer:
A=cytoplasm
B= chloroplast
C= endoplasmic reticulum
D= golgi vessels
E= golgi apparatus
F= vacuole
G= mitachondria
Use soil in a sentence.
Answer:
the soil was dry so i watered your plant
Which scientist discovered the electron?
Answer:
J.J. Thomson
Explanation:
He was the first one to discover the electron
Answer:
Thomson
Experiments with beams of negative particles were performed in Britain by Joseph John ("J.J.") Thomson, and led to his conclusion in 1897 that they consisted of lightweight particles with a negative electric charge, nowadays known as electrons. Thomson was awarded the 1906 Nobel Prize
What’s the complete reaction for photosynthesis
Answer:
the reaction to carbon dioxide and water to produce sugar, as well as oxygen.
The complete reaction for photosynthesis is:
Carbon Dioxide + Water + Light → Glucose (Sugar) + Oxygen
What was a positve aspect of interaction between French settlers and American Indians?
1: American Indians gained access to manufactured goods.
Why did life first occur in the oceans and not on Earth’s surface?
Answer:
I think because many more bacteria and cells and etc were first like created in the water, they they developed and made bigger and bigger living organisms
Answer:
Because God decided that he was gonna make animals first and he started with the ocean and then land and sky. He then made Adam to take care of all of the animals. But saw that he was lonely and made Eve with one of his ribs. He then put them in the garden of Eden with a tree that was forbidden to eat from. The tree of knowledge of the good and evil. One day eve was walking by the tree when a serpant asked her why they didn't eat from it. She replied by saying that God asked them to not eat from that tree. The serpant told Eve that God just doesn't want them to be knowledgeable like him. She took a bite of the apple and then gave some to Adam. They then realized that they were naked and made clothing from animal skin. This was what created sin. They tried to hide from God but he already knew and he banished them from the garden with angels and a fire sword at the enterance. He went to the serpant and cursed him for telling Eve to eat from the tree. Adam and Eve went on their way and had 2 boys. Cane and Abel.
Explanation:
a two-layered arrangement of phosphate and lipid molecules that form a cell membrane, the hydrophobic lipid ends facing inward and the hydrophilic phosphate ends facing outward.
concentration gradient
passive transport
prokaryotic cell
phospholipid bilayer
Answer: I think it's phospholipid bilayer
Explanation:
Im sorry if that is wrong.
Imagine a glucose molecule entering the cell membrane. Would that
molecule be able to reach the mitochondria faster if the cell had a smaller
volume or a larger volume? Explain.
Answer: THE TRANSPORT OF A MOLECULE FROM THE CELL MEMBRANE TO THE MITOCHONDRIA WOULD BE FASTER IN A CELL WITH A SMALLER VOLUME BECAUSE THERE WOULD BE LESS DISTANCE TO TRAVEL
Explanation:
I hope this helped
Glucose is a simple sugar that constitutes of carbon, hydrogen and oxygen atoms. It is the most abounding monosaccharide out of all the carbohydrates.
The glucose molecule will move actively to the mitochondria from the cell membrane if the membrane has a smaller volume.
The reason for the answer is:
Smaller the cell size less will be the covering space, hence the molecule will move less distance to reach its target.Mitochondria uses glucose molecules and generates carbon dioxide as the waste material.It is not always beneficial for the cell to be larger sometimes smaller cells can be more dynamic.Therefore, the glucose molecule will travel faster when the cell membrane has a small volume.
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Where is the DNA located in a eukaryotic cell?
Answer:
It is located in the nucleus
Explanation:
Answer:
Explanation:
nucleus
The nucleus is particularly important among eukaryotic organelles because it is the location of a cell's DNA.
What is the three letter code found in mRNA?
A. Thymine
B. Cytosine
C. Codon
D. Anti-codon
Answer:
D
Explanation:
during diffusion,how do the molecules physically get from one place to the other?(spaceship tractor beam? wiged monkeys?)
Is this right? NEED HELP ASAP
Answer:
They all seem to be correct, good job!
Answer:
Correct
Explanation: