The atmosphere: protects the earth from harmful radiation is made mostly of nitrogen traps heat from the sun can be used to transmit radio signals is important in the water cycle
Answer:
is this a true or false question?
4. In transcription, how come the whole DNA molecule is not copied into mRNA?
Answer:
Although the mRNA contains the same information, it is not an identical copy of the DNA segment, because its sequence is complementary to the DNA template. Transcription is carried out by an enzyme called RNA polymerase and a number of accessory proteins called transcription factors.
Explanation:
DNA is transcribed into mRNA and this mRNA has the complementary sequence of DNA but is not identical to DNA.
What is transcription?The mechanism for transferring genetic information becomes more complicated if both strands of DNA serve as transcriptional templates.
If both strands of DNA serve as transcriptional templates, dsRNA would be produced, preventing the synthesis of proteins.
Because its sequence is complementary to the DNA template, the mRNA is not an exact replica of the DNA segment even though it includes the same information.
Therefore due to complementary not identical sequences of mRNA during transcription whole DNA molecule is not copied to mRNA.
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Two atoms have the same number of protons but different numbers of neutrons. These atoms are:
A. electrons
B. isotopes
C. molecules
D. radiation
tysm!
Answer:
Isotopes
Explanation:
If two atoms have different numbers of protons, they are different elements. However, if two atoms have the same number of protons, but different numbers of neutrons we refer to them as isotopes. Two terms we use to identify nuclides (isotopes) are atomic number and mass number.
which is it?
a , b, c, or d?
The evolutionary pathways of five species are represented in the diagram below.
Present
{
Past
Whích statement is best supported by the diagram?
А.
Species T and Species U are related to species X
B. Species X evolved later than Species U but before Species s.
С.
Species T is the ancestor of Species S.
D
Species U and V evolved from Species S.
Answer:
4
Explanation:
The statement that is best supported by the image is that species T and species U are related to species X.
What is evolution?Is the gradual development of new forms of organisms from their ancestral forms.
In the image, X is the ancestor of T, U, V, and S. Thus T, U, V, and S are related by common ancestry.
Thus, it is correct to say that T and U are related to species X.
However, it is incorrect to say that X evolved later or species U and V evolved from S.
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PLEASE HELPPP ASAP> NO LINK OR UNRELATED ANSWERS
The Human Body in Space
NASA monitors the bodies of animals and humans to see how they react to extended periods in space. When the body is in space, it no longer has the strong pull of Earth’s gravity on it. Because the body’s systems normally function in the presence of gravity, NASA has been studying the effects of weightlessness on the body.
Weightlessness Takes a Toll
On Earth, the heart naturally pumps blood more forcefully to the upper body than to the lower body, where gravity helps the blood flow down. In space, the heart continues to pump the blood more forcefully to the upper body, but the balancing force of gravity does not pull the blood to the lower body. This uneven blood flow causes astronauts’ faces to become puffy and their lower bodies to become thin.
The shape of the spine also changes in space. Without the force of gravity pushing the vertebrae closer together, the spine stretches out and causes pain in some cases.
Another system affected in space is the body’s balancing system. To balance itself, the brain acquires information from the eyes, muscles and tendons, and a set of sensors (called the vestibular apparatus) in the inner ear. In space, the only balancing information that can be relied on enters through the eyes, so astronauts have difficulty moving around.
The most serious problem for astronauts, however, is bone loss. In space, the bones lose minerals, such as calcium, potassium, and sodium. The bone loss in the legs can be as high as ten percent, and even exercise does not completely solve the problem.
Laboratory in Space
With the completion of the International Space Station (ISS), NASA will be able to study some of the effects of long-term exposure to weightlessness. NASA also plans to expand its studies to better understand how the immune system is affected and how radiation, which is much greater in space,
affects humans. Radiation can pose serious health threats, including cancer and neurological damage.
Because people working together on the ISS will be in small spaces for long periods of time, NASA also plans to study how working in confined spaces affects astronauts’ personalities.
Infer What does NASA expect to gain by studying the effects of long-term space travel on the human body?
Answer:
Knowledge gained during the early years of human spaceflight indicated an adaptation to the new environment. While the empirical evidence was limited, the biomedical data indicated that microgravity alters the musculoskeletal, cardiovascular, and neurosensory systems.
Can someone tell me the answers to these problems?
How do organisms like planarian regenerate their bodies ?
Answer:
Regeneration.
Explanation:
Planarian can be cut into pieces, and each piece can regenerate into a complete organism. Cells at the location of the wound site proliferate to form a blastema that will differentiate into new tissues and regenerate the missing parts of the piece of the cut planaria.
match the following structures on the diagram.
im confused on this some how.
Answer:
A-chromatin B-chromosome c-chromatic d-nuclear membrane e-spindle f-centriole
Explain the function of enzymes and how enzymes
can be denatured.
Answer:
They speed up chemical reactions and are denatured by high temperatures and high pH.
Explanation:
Enzymes speed up chemical reactions. They have specifc conditions that allow them to work effectively. Temperature and pH affects how enzymes work. The optimum temperature is the temperature at which enzymes will function best. In most instances they are around 37-40°C (in the human body). Temperatures above this will denatured (destroy) the enzymes therefore they cannot do their task. At Temperatures below the optimum temperature the enzymes activity is decreased to the point where they may not be active.
Optimum pH is the pH at which the enzymes works best. These vary based on the type of enzyme. Any pH above the optimum will denatured the enzymes (destroy). pH below the optimum will decrease the ezymes activity to the point where they may not be active
Which is an example of communities ( in terms of biology )
A. 10 white-tailed deer
B. 2 blue jays, 3 northern cardinals, and 1 house sparrow eating seeds
C. 1 snapping turtle on a rock; 2 snapping turtles near the edge of a pond
D. 6 bullfrogs in a pond; 30 bullfrog tadpoles hatching from eggs
Answer:
B
Explanation:
A biological community is defined as a group of different species which interact with each other within the same environment.
Of the choices, only option B mentions more than one species (Blue Jay, Northern Cardinal and House Sparrow) and they all seem to be in the same environment interacting (all eating seeds).
Therefore option B is correct.
Hope this helped!
Answer:
B. 2 blue jays, 3 northern cardinals, and 1 house sparrow eating seeds
Explanation:
Hope you have a great day :)
Which of the following is a part of a land-based carbon cycle?
What are your answer choices?
Sustainable development and land use planning are most concerned with _______.
Answer:
improving long term city health
Which statement correctly describes the process of photosynthesis?
A. The mitochondria use oxygen, water, and sunlight to produce
sugars and carbon dioxide.
B. The chloroplasts use carbon dioxide, water, and sunlight to
produce sugars and oxygen.
C. The chloroplasts use oxygen, water, and sunlight to produce
sugars and carbon dioxide.
D. The mitochondria use carbon dioxide, water, and sunlight to
produce sugars and oxygen.
Answer:
B
Explanation:
the equation for photosynthesis is:
carbon dioxide + water ---> glucose +oxygen
(light)
The statement that correctly describes the process of photosynthesis is that chloroplasts use carbon dioxide, water, and sunlight to produce sugars and oxygen. The correct option is B.
What is photosynthesis?Photosynthesis is the process of producing food, nutrition, and energy. It is done by plants and algae because only they contain chlorophyll. Those organisms containing chlorophyll can perform photosynthesis.
It is a chemical process and the process involves, carbon dioxide, water, and sunlight, and it produces sugar and oxygen as a byproduct. The oxygen is released, whereas the sugar gives the energy.
The process can be described as chloroplast absorbing the sunlight for plants, and the process can only occur in the presence of light or sunlight.
Thus, the correct option is B. The chloroplasts use carbon dioxide, water, and sunlight to produce sugars and oxygen.
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What comes next in a super giant's life cycle?
What is condensation and what cycle is it a part of?
What four legged relative of snakes was used to compare genomes?
Answer:
Lizards / Reptiles
(Scientific four-legged snake is: Tetrapodophis)
Explanation:
couldn't add answer ^^ ignore comment :-)
A(n)\ an space that presents the right conditions for an individual, population or species to liveit can be as big as the Atlantic Ocean for some species of fish , or as small as a pond where a species of bacteria lives 1.environment
2.biome
3.ecosystem
4.habitat
Answer:
The correct answer is - habitat
Explanation:
A habitat is a geological area or a particular area with specific conditions suitable for an individual species or population to live there. Habitat can be larger as Atlantic ocean or small as a pond for fishes or and other organisms. Habiate is like address of an organism.
To measure motion, you must be able to compare it to a ________ point, or a non moving point.
Answer:
To measure motion, you must be able to compare it to a reference point, or a non moving point.
What comes next in a super giant's life cycle?
Answer: Depending on its size, the star becomes either an average star or a massive star. The average star then becomes a red giant, a planetary nebula, and ends its life as a white dwarf.
HOPE THIS HELPS PLEASE BRAINLIEST
(PLESE HELP) If you exert a force of 500 N to walk 4 m up a flight of stairs in 5 s, how much power do you
use? (INCLUDE THE UNIT for power!)
Answer:
LETSS GOOOOOOOOOO
Explanation:
Answer:
Solution given:
Force [F]=500N
distance [d]=4m
time [t]=5s
Now
power =F× velocity
=F×d/t=500×4/5=400 watt
what is meanustration pariod
Answer:
menstration period is when a woman's body releases tissue it no longer needs so then the girl bleeds (usually for 7 days) and then every month or so (different for all girls) the uterus lining gets thicker to prepare for a fertilized egg if the woman becomes pregnant. :)
describe a specific exmaple of postive action that reduce human imapct on land?
Answer:
Human activities contribute to climate change by causing changes in Earth’s atmosphere in the amounts of greenhouse gases, aerosols (small particles), and cloudiness. The largest known contribution comes from the burning of fossil fuels, which releases carbon dioxide gas to the atmosphere. Greenhouse gases and aerosols affect climate by altering incoming solar radiation and out-going infrared (thermal) radiation that are part of Earth’s energy balance. Changing the atmospheric abundance or properties of these gases and particles can lead to a warming or cooling of the climate system. Since the start of the industrial era (about 1750), the overall effect of human activities on climate has been a warming influence. The human impact on climate during this era greatly exceeds that due to known changes in natural processes, such as solar changes and volcanic eruptions.
Drag the tiles to the boxes to form correct pairs.
Match the causes with their effects.
injecting fracking fluids
into the ground
oil spills during transport
on a ship
deforestation
destroys animal habitats and
causes topsoil to erode
pollutes groundwater with
dangerous chemicals
harms aquatic creatures
and vegetation
It destroys animal habitats and causes topsoil to erode- deforestation 2) pollutes groundwater with dangerous chemicals- injecting fracking fluids into the ground 3) harms aquatic creatures and vegetation- oil spills during transport on a ship.
What is fracking fluids?In order to enhance the amount of hydrocarbons that may be extracted, drilling operations use fracking fluid (also known as frac fluid). The fluid stops the well from corroding. Among other things, it prevents blockages, bacteria from growing, and lubricates the extraction process.
In summary, the chemical composition varies from well to well and is complicated. Depending on the exposure amount, several of these substances can be dangerous to human health.
According to estimates from the oil and gas sector, chemical additives only make up about 1%.
Therefore, It destroys animal habitats and causes topsoil to erode- deforestation 2) pollutes groundwater with dangerous chemicals- injecting fracking fluids into the ground 3) harms aquatic creatures and vegetation- oil spills during transport on a ship.
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Answer:
injecting fracking fluids into the ground - pollutes groundwater with dangerous chemicals
oil spills during transport on a ship - harms aquatic creatures and vegetation
deforestation - destroys animal habitats and causes topsoil to erode
Explanation:
Plato
please help ill mark brain ty!!!
Answer:
I believe it's D. the skeleton protects the brain and the spinal cord.
Please help will mark brainlest
What is located at both of the poles on Earth
Answer: The North Pole lies in the Arctic Ocean while the South Pole is in Antarctica.
what is the other name of iron oxide
Answer:
Iron(III) oxide or ferric oxide
Explanation:
Question 9 of 17
Water molecules break down during cellular respiration
O True
O False
Which of these is an example of a trace fossil?
A
skin
B
dung
С
a leaf
D
a skull
Name 4 systems that perform the process nutrient absorption
Answer:
The digestive system does that know just search up what is in the digestive system in gogle
Explanation: