Answer:
A.
Explanation:
I think and I hope I am so sorry if it is wrong
Answer:
What the Miller-Urey experiment simulated was how the first living organisms began (option c).
Explanation:
The Miller-Urey experiment owes its name to the scientists who developed it, Stanley Miller and Harold Clayton Urey, who in 1953 designed an experiment to demonstrate that organic substances could be produced from inorganic substances under certain environmental conditions that would favor the process.
From the Miller-Urey experiment it was possible to demonstrate, in some way, that the organic substances to constitute the first living organisms were formed from inorganic substances in the primitive atmosphere.
The experiment required subjecting a mixture of ammonia, methane, hydrogen, CO₂, nitrogen and water to elevated temperatures and electrical discharges. The result was the obtaining of some amino acids, acetic acid and glucose.
On this basis, it can be stated that the Miller-Urey experiment simulated how the first living organisms began.
The other options are not correct because:
a and b. The Miller-Urey experiment was not useful for simulating primitive or modern earth conditions.
d. The experiment does not simulate how complex organisms form.
There are many stars and other objects in the universe. True False
Answer:
true
Explanation:
Answer:
True
Explanation:
Those pictures taken by the Hubble Telescope are not lying!!!
There indeed many many many many other celestial objects out there. Even in our own galaxy (milky Way) , there are an estimated 100 thousand million stars (10^11-10^12). There are millions upon millions of galaxies too, so the statement is true.
What part of the atom allows one atom to react with another one
Answer: An important principle to know is electrons may be transferred from one atom to another or even shared between atoms (allowing atoms to bind together). These bonds allow for the formation of molecules, combinations of atoms (including those of different elements).Explanation:
What statement is true about X chromosomes?
A: Only men have them
B: Women have two of them
C: Half of the babies born do not have them
D: Only women have them
Answer:
b
Explanation:
men and women have x chromosomes but women have 2
Help please.
Biology.
Answer:
for the first it could effect how much the baby weighs or how healthy they are depending on what you eat as for the second No they will not it is impossible because those happened before the baby was born so it is in NO way possible for the baby to inherit these traits
Explanation:
i hope this helps
Answer:
Create offspring with a few different levels of food supply How does food supply affect the body type of offspring?
Explanation:
If the parent was eating scarcely the offspring might come out very skinny and not have enough nutrients. The offspring would come out less healthy than other offspring that would have good food supply and nutrients.
I WILL GIVE BRAINLIEST!!!
In humans, three alleles affect blood type. The A and B alleles are codominant, and the O allele is recessive.
An AB blood type father has children with an A blood type mother (genotype AO).
What are the chances that their children will have AB type blood?
Choose 1 answer:
(Choice A)
A
25%
(Choice B)
B
50%
(Choice C)
C
75%
(Choice D)
D
100%
Answer: I think the answer is 25%
Explanation: When you draw the punnet square you end up with 25% A blood type, 25% AB blood type, 25% Ao and 25% Bo
In humans, three alleles affect blood type. The A and B alleles are codominant, and the O allele is recessive. I think the answer is 25% as when you draw the punnet square you end up with 25% A blood type, 25% AB blood type, 25% Ao and 25% Bo.
What is ABO system in blood group?In humans, the blood group system is known as the ABO system where blood groups A and B are codominant and O blood group is recessive. The genotype of the A blood group could be AA or AO similarly for the B blood group genotype would be BB or BO, for the O blood group OO whereas for the AB blood group both A and B alleles should be present together.
Cross: AB blood type father with an A blood type mother (genotype AO)
Gametes: A, B and A, O
Punnett square:
A B
A AA AB
O AO BO
Here, there are 25% chances of AB blood group offspring 50% for the A blood group (AA and AO) and 25% B blood group (BO). I think the answer is 25% as when you draw the punnet square you end up with 25% A blood type, 25% AB blood type, 25% Ao and 25% Bo.
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WILL MARK BRAINLIST
In an area with tall grass but with very few trees, which of the following other conditions are most likely to exist as well?
1) It is near 30° latitude north or south or on the leeward side of a mountain range.
2) Moist air is rising over the area.
3) Night temperatures are much colder than daytime temperatures.
4) The soil has a thick layer of decomposed, nutrient-rich organic material.
5) There is an extremely high diversity of species in the area.
6) There is little rainfall and frequent fires regularly cut the vegetation to the ground.
a: 2 and 5
b: 3 and 4
c: 1 and 3
d: 4 and 6
Answer:
B
Explanation:
Answer: D
Explanation:
because of the fires there is not enough time for the trees to grow
2x^2+x-6=0 solution(s)?
Answer:
-2 and 1.5
Explanation:
USE DESMOS! IT IS A FREE GRAPHING CALCULATOR SUPER USEFUL!
PLS HELP ME pls SO IT SAYS READ the text and say how the adaption is occured in hummingburs and how they were savory flavors but now they are sweet sensing now how it got adapted make a cer How did the presence of an adaptation change the frequency of a specific trait in hummingbirds? This will be graded based on your overall claim and supporting statements, use of evide from the text, and your encreasoning (CER).
Most humans enjoy candy, cake, and ice cream. As a result of evolutionary history, we have a wide variety of tastes. This is not true of all animals. Cats do not seek sweets. Over the course of their evolutionary history, the cat family tree lost a gene to detect sweet flavors. Most birds also lack this gene, with a few exceptions. Hummingbirds are sugar junkies.
Hummingbirds evolved from an insect-eating ancestor. The genes that detect the savory flavor of insects underwent changes, making hummingbirds more sensitive to sugars. These new sweet-sensing genes give hummingbirds a preference for high-calorie flower nectar. Hummingbirds actually reject certain flowers whose nectar is not sweet enough!
Which of the following best describes bases?
A They feel slippery and taste sour.
B They turn red litmus paper blue and react with metals.
C They taste bitter and react with carbonates.
D They turn red litmus paper blue and taste bitter
Answer:
They turn moist red litmus paper blue and they react with metals.
They turn moist red litmus paper blue because they have a pH range of 8-14, hence they are indicated by a blue colour of the litmus.
They react with metals because they are reactive, the reaction forms a metal salt and water.
Name the four main categories of carbon compounds that are important to the structure and function of cells. Provide an example of each.
Answer:
Carbs, Lipids, Nucleic Acids, and Proteins.
Explanation:
Carbs - potatoes, bread, rice
Lipids - fats, oils, waxes
Nucleic Acids - DNA, RNA
Proteins - enzymes, hair
Main categories of carbon compounds are carbohydrates, lipids, nucleic acids and proteins.
What are the functions of carbon compounds?A compound found mainly in living things is known as an organic compound. Organic compounds make up the cells and other structures of organisms and carry out life processes.
Carbon is one of the major elements by which organic compounds cannot be imagined. Its compounds are very useful in human life as well as for nature.
Some common uses of carbon compounds are: Carbon can be used as a decorative tool in jewelry pieces. Fossil fuels such as crude oil, methane gas.
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Which term refers to two species in the same area using the same resources,
such as bison and prairie dogs?
O A. Nutrient availability
B. Interspecific competition
C. Invasive species
D. Territoriality
Interspecific competition refers to two species in the same area using the same resources, such as bison and prairie dogs.
What is interspecific competition?Interspecific competition is a form of competition between organisms of different species that occupy similar ecological niches and compete for the same limited resources such as food, water, space, and mates. These resources are essential for the survival and reproduction of the competing species, and their scarcity can lead to negative impacts on the growth, reproduction, and survival of one or both species.
Interspecific competition can result in the exclusion of one species from an area, the evolution of unique adaptations that allow a species to exploit a different resource, or a stable coexistence of both species through resource partitioning. Interspecific competition is an important ecological force that shapes the diversity and distribution of species in an ecosystem.
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Match the reactants and products with the correct HALF of PSN.
Answer:
B
Explanation:
Please help and try to give correct answer!
How are the processes of weathering and erosion similar?
Which layer of the atmosphere is between the mesosphere and the exosphere?
thermosphere
troposphere
stratosphere
exosphere
answer asap brainlest
Name the process in plants that make glucose?
plants use sunlight, water, and the gases in the air to make glucose, which is a form of sugar that plants need to survive. This process is called photosynthesis
Why were forests harvested without regard for the consequences for so long?
O No one thought they would be around long enough to worry about running out
O The forests were always regrowing.
O People developed back-up plans for when the forests would be depleted.
O They were viewed as an unlimited supply of wood.
Answer:they were viewed as an unlimited supply
Explanation:
I just took the test
Answer:D they were viewed as an unlimited supply of wood
Explanation:
How many new strands of DNA are made at the end of DNA replication?
Answer:
Brainliest pls
Explanation:
Finally, an enzyme called DNA ligaseseals up the sequence of DNA into two continuous double strands. The result of DNA replication is two DNA molecules consisting of one new and one old chain of nucleotides.
How does the temperature change throughout the cycle of a massive star?
Answer:
I believe that this temperature increases like alot
Expansion- requires alot of heat and combustion, making the star hotter as it grows. unless it collapses on itself..
How many pairs of homologous chromosomes are in this picture?
Help plz
Answer:
3
Explanation:
they are in a similar gene position
Which of the following best distinguishes why farmers are looking for fertilizer alternatives?
Farmers are realizing that fertilizer is harmful to the environment.
Farmers are looking for cheaper ways to make their crops grow quickly.
Farmers are trying to comply with regulations that prohibit fertilizer use.
Farmers are beginning to understand that phosphorus resources are quickly being depleted.
Answer:
Hm, I think farmers are looking for cheaper ways to make their crops grow quickly.
Explanation:
Answer:
farmers are looking for cheaper ways to make their crops grow quickly.
Explanation:
do deers eat foxes? i will mark brainliest
Answer: what? No, deers are herbivores man
Explanation:
Fill in the blanks to complete each statement about mountains.
Several mountains together form a mountain ____. A few of these combined form a mountain system. Several systems combined form a mountain ___, which can stretch thousands of miles in length.
Answer:
Fill in the blanks to complete each statement about mountains.
Several mountains together form a mountain
range. A few of these combined form a mountain system. Several systems combined form a mountain
2. belt
, which can stretch thousands of miles in length.
Explanation:
Answer: range and belt
Explanation: i hope this helps :)
A cell membrane is allows some materials through the phospholipid bilayer. Materials that are too large need to be transported through a channel proteins embedded in the membrane. These proteins do not use energy to move these particles into and out of the cell. What is the mechanism being described?
Answer:
Diffusion
Explanation:
Diffusion is the movement of substances from an area of high concentration to an area of low(er) concentration
Type a summary of the phases of water and how a substance changes from one to the other.
Answer:
There are three phases of water that include solid water, liquid water and gas water. Water in solid phase has definite shape and size and molecules are closely packed for example: ice, water in liquid phase or liquid water phase, molecules are close together but can move as per the shape of container, for example: juice; and gas water phase is the phase in which molecules are far from each other.
Same as matter, the phases of water also changes as per the temperature and pressure of the ecosystem changes. When temperature increases, Solid water changes to liquid water and the process called melting and liquid water convert into gas water and the process called vaporization. When temperature decreases, liquid water convert into solid water with the process freezing and gas water convert into liquid water through condensation.
Which force primarily acts on a natural or artificial satellite to keep it in orbit around a planet
Magnetism
Centripetal force
Gravity
Nuclear force
Answer:
Gravity
Explanation:
When its altitude is matched by the pull of the Earth's gravity, a satellite circles Earth. The satellite will fly off into orbit in a straight line or crash down to Earth without this equilibrium.
By juggling two things, a satellite retains its orbit: its velocity (the speed it takes to travel along a straight line) and the gravitational force on it that the Planet provides. To resist the greater gravitational force, a spacecraft orbiting closer to the Earth needs more velocity.
Answer:
Gravity
Explanation:
On edge
when allows humans to have different traits from each other
Answer:
It's because of their genetic makeup and specific traits called polygenic traits
Help me immediately
Answer:
D
Explanation:
Which codon is the start signal for translation?
AUG
UAA
ATG
UGA
Answer:
UGA is the start signal for a translation.
help me please will give brainliest
Answer:
The answer is double helix.
Explanation:
In its natural state, each DNA molecule is actually composed of two single strands held together along their length with hydrogen bonds between the bases. Watson and Crick proposed that the DNA is made up of two strands that are twisted around each other to form a right-handed helix, called a double helix.
Hope this helps!! ;)
need help asap ! please and thank you !
