Answer:
The Miller-Urey experiment was conducted to simulate the conditions on Earth when life arose, and see if a chemical evolution could occur. This experiment was performed without oxygen, because they knew that if oxygen was added, the amino acids would oxidize. In particular, the experiment intended to simulate a volcanic eruption was analyzed.
Thus, particles of water, methane, ammonia and hydrogen were exposed to high temperatures and electric discharges that simulated these eruptions, during a determined period. Later, it was observed that organic compounds had emerged from this exposure, which allowed us to infer one of the hypotheses regarding the origin of life on Earth.
Human p53 is a tumor-suppressor gene located on chromosome 17. The function of this gene is to prevent cells with damaged DNA from undergoing mitosis. What would most likely result if there were a mutation that decreased the function of the p53 gene?
The answer is “Germs cells would undergo only one meiotic division.
Explanation:
I remember learning this in my biology class
Single amino acid changes in p53 caused by TP53 gene mutations make the protein less functional. Without p53, cell proliferation is not efficiently controlled, and DNA damage can build up in cells.
How p53 gene is important?Such cells might continue to divide uncontrollably, which would promote the development of tumors. By stopping the cell cycle to give the repair mechanisms time to restore genomic stability, p53 plays a significant function as a DNA repair facilitator.
Additionally, p53 adopted a variety of roles to directly influence the operation of different DNA-repair mechanisms.
Cancer cells may develop and spread throughout the body as a result of mutations (changes) in the p53 gene.
Therefore, numerous cancer kinds and the genetic disorder Li-Fraumeni syndrome have both been linked to these alterations.
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You learned in the reading that some symbiotic relationships are helpful and some are harmful. Look at the symbiotic relationships listed below and select all where at least one organism is harmed (the reading calls these harmful relationships). Group of answer choices Commensalism Parasitism Mutualism Predator-Prey Competition
Answer: Parasitism, Predator-Prey, Competition
Explanation:
The symbiotic relationship is the relationship in which two distinct species are associated with each other. In the symbiotic relation the species may get harm or benefit of association. Parasitism can be defined as the symbiotic relationship in which one species get harmed and other one receives the benefit. For example, malarial parasite plasmodium derives the nourishment from the host body (human). Predator-prey relationship is also harmful as the predator kills the prey to obtain it as food. Competition is harmful in the sense two or more organisms of the same or different species compete for the same resource, the most dominant receives the resource the inferior organism is either killed or harmed in the fight for resources.
Which structure inside plant cells helps in photosynthesis?
Chloroplast
Mitochondrion
Nucleus
Vacuole
Answer:
chloroplasts
Explanation:
chloroplasts
Photosynthesis takes place in chloroplasts; cell walls allow plants to have strong, upright structures; and vacuoles help regulate how cells handle water and storage of other molecules.
Answer:
Chloroplast
Explanation:
photosynthesis takes place in chloroplasts
The first is red cell (erythrocyte)
the second is white cell (leukocyte)
b) Which organelle is missing in the red blood cell?
c) Describe a feature that shows the difference between a red blood cell and other cells in the human body.
d) Explain how red blood cells are adapted to perform their function.
e) Describe the functions of white blood cells.
plzz plz help plz
Answer:
leukocyte
Explanation:
leukocyte is the organelle missing in the red blood cell.
What is the complementary DNA sequence to the DNA sequence GTA TAC ATG
possible answers:
GTA TAC ATG
GAT ATC TAG
CTA TAG ATC
CAT ATG TAC
Answer:
CAT ATG TAC
Explanation:
Adenine (A) pairs with Thymine (T)
Cytosine (C) pairs with Guanine (G)
And vice-versa
Would you rather burn to death or freeze to death? Hmm...
A. approach-approach conflict
B. avoidance-avoidance conflict
C. approach-avoidance conflict
D. double approach-avoidance conflict
Answer:
c
Explanation:
HURRY
Which of the following phase changes occur due to an INCREASE in energy? (Pick all that apply)
a. Condensation
b. Boiling
c. Freezing
d. Sublimation
e. Melting
Answer:
Boiling
Explanation:
Boiling is an increase in energy.
Answer:
melting and condensation should go
Which is a natural source of greenhouse gases?
Answer:
Examples of greenhouses gases are water vapor, carbon dioxide. methane, nitrous oxide and ozone (O3). Lightning produces ozone as does UV light at high altitudes, methane is produced biologically and in volcanoes (but doesn’t last long in the atmosphere). Carbon Dioxide is also produced biologically and in volcanoes. Water vapour is most from ocean evaporation, which is bad news if the Earth gets hotter because that leads to more Water vapour.
Explanation:
A natural source of greenhouse gases is respiration
Greenhouse gases are gases that trap heat in the atmosphere and warm the planet. The major greenhouse gases are:
Carbon dioxideMethaneWater vapor Nitrous oxide Fluorinated gasesThe greenhouse gases occur from natural sources and synthetic sources
Some of the natural sources of greenhouse gases are:
Respiration Decomposition of plants.Ocean release etc.Hence, a natural source of greenhouse gases is respiration
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the diagram shows a model of how a hydra reproduces by budding
Answer:
B. It shows offspring that have the same genes as the parent.
C. It shows asexual reproduction.
Explanation:
Hydra reproduces by budding which is kind of asexual reproduction. In budding, a small bud appears on the body of that organism and grow in size with the passage of time and finally detached from the parent body. so no fusion of gametes occurs so no chance of genetic variation. The offspring have the same genes as the parent because it forms from one parent.
Type a paragraph explaining how the atoms in sugar molecules can be used to form amino acids and other large carbon-based molecules. Cite Work
Answer:
install socratic it gives you all answers
Explanation:
What is the difference between an embryo and a foetus
Answer:
An embryo is the early stage of human growth in which the vital body structures of organs are developed. In the 11th week of pregnancy, which is the 9th week of development after egg fertilization, an embryo is considered a fetus.
Explanation:
Answer:
An embryo is the early stage of human development in which organs are critical body structures are formed. An embryo is termed a fetus beginning in the 11th week of pregnancy, which is the 9th week of development after fertilization of the egg.
Explanation:
What would be an appropriate key for these traits
Answer:
The correct answer is -
TT - short BB - blue eyes
Tt - short tail Bb - blue eyes
tt - no tail bb - brown eyes
Explanation:
In this given question it is stated that short tails of ribbits are dominant over the no tail trait of the rabbits and similarly blue eyes trait of the rabbits is also dominant over the brown-eye trait.
A dominant trait is represented by a capital letter and a recessive trait is represented by the small letter so for the tails alleles will be denoted as T and t, and for the eyes, the alleles would be B for blue and b for brown.
The key for these traits would be-
TT - short BB - blue eyes, due to both dominant allele,
Tt - short tail Bb - blue eyes, due to dominant allele masks the recessive allele
tt - no tail bb - brown eyes, due to both alleles are recessive
True or false: Guard cells close openings in the leaves slowing down water loss.
Answer:
True
Guard cells close openings in the leaves slowing down water loss.
Answer:
True
Explanation:
Stomata are pores in the leaf that allow gas exchange where water vapor leaves the plant and carbon dioxide enters. Special cells called guard cells control each pore's opening or closing. When stomata are open, transpiration rates increase; when they are closed, transpiration rates decrease. So when it is opened the water vapor depletes quicker but when its closed it slows down the process of depletion.
What organisms provides all the energy for an ecosystem?
Answer:
Plants, algae and photosynthetic bacteria provide an energy source for a majority of the worlds ecosystems.
Explanation:
help please I will mark brainiest
Answer:
A
Explanation:
Why is about half of all freshwater on Earth is inaccessible to humans?
Group of answer choices
It is too deep underground
It is in the atmosphere in clouds
It is too dirty to clean
It is frozen in glaciers
Explain how the geologic time scale is used to organize Earth’s history.
Think about how the geologic time scale was created and how it is divided. Then answer the following questions.
How did scientists from the geologic time scale?
How is this scale organized?
What processes changed the Earth's environment during Precambrian time?
Answer:
The first principle you need to understand about geologic time is that the laws of nature are always the same. This means that the laws describing how things work are the same today as they were billions of years ago. For example, water freezes at 0°C. This law has always been true and always will be true. Knowing the natural laws helps you think about Earth’s past, because it gives you clues about how things happened very long ago. It means that we can use present-day processes to interpret the past. Imagine you find fossils of sea animals in a rock. The laws of nature say that sea animals must live in the sea. That law has never changed, so the rock must have formed near the sea. The rock may be millions of years old, but the fossils in it are a clue for us today about how it formed.
Now imagine that you find that same rock with fossils of a sea animal in a place that is very dry and nowhere near the sea. How could that be? Remember that the laws of nature never change. Therefore, the fossil means that the rock definitely formed by the sea. This tells you that even though the area is now dry, it must have once been underwater. Clues like this have helped scientists learn that Earth’s surface features have changed many times. Spots that were once covered by warm seas may now be cool and dry. Places that now have tall mountains may have once been low, flat ground. These kinds of changes take place over many millions of years, but they are still slowly going on today. The place where you live right now may look very different in the far future.
The first principle you need to understand about geologic time is that the laws of nature are always the same.
What is the Time scale?Water, for instance, freezes at 0°C. This rule has held and will continue to hold forever.
Understanding natural principles facilitate historical thinking because it provides hints about how things were very long ago. It implies that we can interpret the past using current methods.
The rock must have formed close to the sea because this law has never changed.
Therefore, The first principle you need to understand about geologic time is that the laws of nature are always the same.
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Fragments of rock or lava that are sent into the air in a volcanic explosion are called
A) fumaroles
B) tephra
C) aggregates
D) cations
E) soil peds
Answer:
Fragments of rock or lava that are sent into the air in a volcanic explosion are called tephra.
Explanation:
The volcanoes come in different shapes and sizes, and with them come different types of eruptions as well. Some volcanoes have explosive eruptions, some mainly release ashes and gasses, while some erupt with lava flows. The volcanoes that have explosive eruptions release a lot of pyroclastic material often propelled high and wide around them.
Part of the pyroclastic material that is released is the tephra. Tephra is basically represented by fragments of very hot rock and lava that are shoot into the air during a volcanic eruption. The tephra is extremely dangerous, as it can be shoot out over a distance of several km, and being very heavy, very hot, and moving at very high speed, when it hits something it manages to destroy it or cause enormous damage, and if it is a living organism that is hot it will mean the end of it for sure.
Answer:
Tephra
Explanation:
Definition: rock fragments and particles ejected by a volcanic eruption.
Which of the following astronomical bodies is largest?
A) Jupiter
B) the Sun
C) the Moon
D) the Milky Way
Thank you ..!
Answer:
Explanation:
milky way
Help me out please
A) Tropism
B) Night
C) Photoperiodism
D) Plant Hormones
Answer:
c
Explanation:
What makes hunting breeds a good choice for studying dog navigation?
Answer: Pointers make an excellent choice for these excursions because they are lean and biddable—important qualities in dogs who will be hundreds of yards away from you during long-range hunts. Conversely, a dog plying the thick woods of a ruffed grouse covert will need to work close.
Explanation:
hunting breeds, such as dachshunds, foxterriers, and Welsh terriers. For generations, people have bred hunting dogs to track prey andthen find their way back to their owners. “Weknow about homing behaviors in these breedsfrom observations, but they haven’t been studiedin detail,” says Benediktová.
Explanation:
I need help on please
Answer:
D.
Explanation:
Sugar carbs (or simple carbs) give you quick-acting, short-term energy and can be found in fruits, white bread, cereal, juice and soft drinks. Starch Carbs (or complex carbs) give you slow-releasing, long-term energy and can be found in whole grains, vegetables and legumes (beans and peas).
What phenomenon is considered to be evidence of the universe "cooling off" after the great explosion of the
Big Bang?
black holes
O cosmic background radiation
O gamma rays
O X-rays
Answer:
If I’m correct it’s O cosmic background radiation
Explanation:
Answer:
black holes
Explanation:
Frida wants to measure the volume of a stone. She starts by pouring 473 mL of water into a large measuring cup. Then she drops in the stone. Now the water measures 499 mL. What is the volume of the stone?
A
15 g
B
26 mL
C
26 cm^3
3
D
62 cm^3
3
*don't respond if you don't know, irrelevant answers will be reported and removed*
Answer:
C
Explanation:
You subtract 499-473. That shows how much water is displaced and the volume of the stone. Hope this helps and have a great day!
Frida wants to measure the volume of a stone. The correct volume is B
The volume of the stone is 26 mL.
What is volume?
The initial volume = 473 mL
The final volume = 499 mL.
The final volume − Initial volume
= 499 − 473
= 26 mL.
Therefore, Frida wants to measure the volume of a stone. The correct volume is B .The volume of the stone is 26 mL.
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Organize the following materials:
pen
staple
board
pencil
paper
desk
marker
paper clip
safety pin
Answer:
THINGS U WRITE WITH
pen pencil marker
Other stuff
Explanation:
is that what u meant?
(GIVING BRAINLIEST!!!)
Pls help me! It should be very easy. The Lin k Is Below. Just copy and paste it.
Kelp me plz question is above
Answer:
top: response bias, middle: question-wording bias, bottom: under-coverage
Explanation:
4. Genes that are responsible for new characteristics that help a species survive in a particular environment
are most likely to do which of the following?
A. rapidly decrease in frequency
B. gradually decrease in frequency
C. increase in frequency
D. not change in frequency
Answer:
The correct answer is - increase in frequency.
Explanation:
According to the theory of Darwin, organisms most likely survive and reproduce in an ecosystem that is able to change or adapt to the changes in the ecosystem.
According to the modern evolutionary theory that the genes that are responsible for new changes or traits that help a species to reproduce and survive in a particular environment increase in frequency and the genes do not helps decrease in frequency.
True or false
The amounts of salt in ocean water is the same everywhere on earth?
Answer:
False
Explanation:
Different areas and seas have higher or lower salt levels
Manuel eats lunch in the cafeteria every day. How does his digestive system make use of the lunch he eats?
a
A. It changes the food into cells that protect the body from illness.
b
B. It converts food into oxygen that is absorbed into the blood.
c
C. It breaks down some food into usable material for the body and discards the rest.
d
D. It breaks down food into the chemicals needed by the body to regulate temperature.
Answer:
C
Explanation:
Answer:
c
Explanation:
