Answer:
B.Law of Gravity
Explanation:
The first hill of a roller coaster is always the highest point of the roller coaster because friction and drag immediately begin robbing the car of energy. At the top of the first hill, a car's energy is almost entirely gravitational potential energy (because its velocity is zero or almost zero).
Roller coasters are ruled by the Law of Inertia. Since an object at rest, stays at rest, at the beginning of the ride a stationary roller coaster is at rest and will need to be pushed or pulled along to get it started. Most are pulled up a large hill called a lift hill.
Why do we observe that superficial, varicose veins are more common in the lower extremities than in the upper extremities?
Answer:
Varicose veins are twisted, enlarged veins. Any superficial vein may become varicosed, but the veins most commonly affected are those in your legs. That's because standing and walking upright increases the pressure in the veins of your lower body.
Explanation:
Give examples of ways organisms may be dispersed. By other living things
Answer:Muchas especies animales, especialmente los invertebrados de agua dulce, pueden dispersarse por el viento o por transferencia con la ayuda de animales más grandes (aves, mamíferos o peces) como huevos inactivos, embriones inactivos o, en algunos casos, etapas adultas inactivas.
Rock pocket mice live in the deserts of the American southwest. Ancestral pocket mice all had light-colored coats that blended in
with the region's rocks and sandy soil, keeping the mice hidden from predatory owls. About 1.7 million years ago, a series of
volcanic eruptions spewed out wide trails of black lava into the middle of rock pocket mouse territory. Currently there are two color
morphs of rock pocket mice: light-colored mice that are typically found in habitats with sandy soil, and dark-colored mice that are
typically found in habitats with dark-colored lava rocks.
Which of the following best justifies the claim that alleles that may be adaptive in one type of environment can be deleterious in
another because of different selective pressures?
Answer:
C
Explanation:
Just answered this
In the last 100 years, the average surface temperature of the Earth has risen by about ____________ degree Fahrenheit and could increase by another one to four degrees in the next 50 years.
How would transcription of the E. coli trp operon be affected by changing the two Trp codons in the leader peptide gene to His codons?
Answer:
The attenuation system would respond more to histidine (His) than to tryptophan (Trp) levels
Explanation:
In genetics, the attenuation system refers to the process of control which is responsible for triggering premature termination of transcription in bacterial operons. In bacteria, the process of attenuation is characterized by the presence of an attenuator, which is a stop signal sequence found in the leader mRNA. The tryptophan (trp) operon, which is a cluster of genes responsible to encode the components required during the production of tryptophan, is controlled by the attenuation system. When there is a high tryptophan level, the ribosomes are able to translate an attenuator sequence, thereby resulting in termination of transcription. The attenuation system also controls the synthesis of other amino acids including histidine (His), phenylalanine (Phe) and threonine (Thr).
is there difference between aqueous channel and aquaporin?
Answer:
Pathways by which water can cross a membrane lipid bilayer. Water can diffuse slowly across the bilayer between the lipid molecules (shown in blue). ... In contrast, water traverses the membrane much more rapidly through aqueous channels (aquaporins - shown in brown), and this process is much less temperature-sensitive.
Explanation:
hope this help you
What is the main source of energy for the world
Help!!! I need some help on this I will give heart and stars
Answer:
Energy energy.
Explanation:
Energy because it talk about light energy because of the heat, and levels.
what are the molecules which are the result of any chemical reaction.
Answer:
In a chemical reaction, the atoms and molecules that interact with each other are called reactants. In a chemical reaction, the atoms and molecules produced by the reaction are called products. In a chemical reaction, only the atoms present in the reactants can end up in the products.
Help me with question 24 giving people brainlist
Answer:
Huntington disease is a dominant autosomic disease so it presents either in heterozygosity (Aa) or in homofzigosity (AA)
observing the pedigree, the two parents have the Aa genotype so by making the punnet's square we have as possible genotypes: AA, Aa, Aa, aa. So the chance to get the disease is 25%
Based on this food web, which organisms are direct sources of energy for secondary
consumers?
Answer:
The answer is Aphid, Bird, and Rabbit.
What happens when plants transpire too much water
A. They grow
B. They wilt and die
C. Their leaves become greener
D. They bear fruits
F. They become healthy
Answer:
B. They wilt and die
Explanation:
During transpiration, the sun evaporates water from the plant. If too much water is lost, the plant will wilt and die.
Samples of different materials A and B have the same mass, but the sample
of B is higher in density. Which statement could explain why this is so?
A. The particles that make up material B are more closely packed
together than the particles that make up material A.
B. The sample of material B has greater volume than the sample of
material A
C. The particles that make up material A have more mass than the
particles that make up material B.
O D. The particles that make up material A are more closely packed
together than the particles that make up material B
Answer: A. The particles that make up material B are more closely packed
Explanation:
The particles that make up material B are more closely packed together than the particles that make up material A. The correct answer is A. The particles that make up material B are more closely packed together than the particles that make up material A.
What is density ?Density is defined as mass per unit volume. Since the samples of material A and B have the same mass, but material B has a higher density, this means that material B has a smaller volume than material A.
The density of a material is related to the way its particles are arranged and packed together. When the particles are more closely packed together, the material will have a higher density. Therefore, option A is the correct answer that explains why the sample of material B is higher in density than material A.
If the samples of material A and B have the same mass, but the sample of B is higher in density, this means that the mass of the particles in material B is greater than that in material A, even though they have the same mass. This is because the particles in material B are more closely packed together, which means that there are more particles in a given volume of material B compared to the same volume of material A.
For example, imagine a container of 1 liter volume containing material A and another container of 1 liter volume containing material B. If the mass of material A and B in each container is the same, this means that the container of material A would have a greater volume than the container of material B. This is because the particles in material A are less closely packed together than the particles in material B.
Therefore, the key difference between the samples of material A and B is the way their particles are arranged and packed together, which determines their density.
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Which of these best explains why
people before Galileo hadn't seen
moons around Jupiter?
A. They hadn't looked in the right
place.
B. They hadn't turned the telescope
toward the night sky.
C. They thought Jupiter didn't have
moons.
D. They thought Earth was the
center of the universe.
Answer:
B.They hadn't turned the telescope toward the night sky.
They thought Earth was the center of the universe. Option D is the correct answer.
What was the time when Galileo saw Jupiter's moons ?Galileo saw these Jupiter's moon around 1600 and the decade.
Galileo was almost unable to just see then every moon on the each night and the reason for this is that some of just moved away too too far in process of the orbit for the weaker telescope to just view. In that case clearly they just orbited then Jupiter in the same way and as the Moon orbits Earth.
And if the moons can orbit the planet, in that case perhaps it is true where the Earth orbited Sun after all in the end . Galileo hadn't seen moons around the Jupiter as it is almost failing geographic observations. Jupiter's moons although do not appear to orbit Earth.
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The process of meiosis is essential in the sexual reproduction and life cycle of many organisms. The outcome of meiosis is haploid gametes. Which statements correctly describe the importance of meiosis to the life cycle or these organisms?
A) Increasing genetic diversity ensures that no two haploid gametes are exactly the same.
B) Taking a diploid cell to its haploid state occurs during the first cell division of meiosis.
C) Checkpoints during meiosis ensures that chromosome separation occurs accurately, avoiding non-disjunction.
D) DNA synthesis occurs before each cell division in meiosis ensures that the integrity of the chromosomes is maintained.
E) Reducing the number of chromosomes by half during meiosis ensures the chromosome number is maintained during fertilization.
Answer:
Its A,B,C, and E on USATESTPREP
Explanation:
Explain two possible reasons why a person who looks well could still be a source of infection microorganism?
Answer:
- many pathogens exhibit a latency (asymptomatic) period of incubation
- usually, pathogens need to replicate many times in order to be transmitted between hosts (i.e., they need to increase the pathogenic load)
Explanation:
The latency stage refers to the period between being exposed to a particular pathogenic microorganism (for example, a virus) and has symptoms associated with the disease caused by such pathogen. Generally, this incubation stage is asymptomatic, thereby a person will look healthy during this period. Moreover, the pathogenic load (usually known as the viral load in viral infections) can be defined as the number of pathogenic microorganisms in an infected person's blood. During the first stages of infection, the pathogenic load usually is low, whereby a person can also look healthy during this period.
answer ASAP
Put the following events in the correct order:
A. The amino acid sequence built from the mRNA varies
B. As the DNA sequence varies the mRNA sequence that is created during transcription
varies,
C. Since the structure of the protein determines its function we see variation in the traits
expressed due to how that protein ultimately functions based on its shape
D. This causes the structure of the protein to be different because different amino acids
are used.
Answer:
B → A → D → C
Explanation:
This question involves gene expression, which is the process of how gene is used to synthesize proteins that determine the phenotype or traits of an organism. Gene expression involves two processes namely: transcription and translation.
- Transcription is the process whereby a DNA template is used to synthesize a mRNA sequence.
- Translation is the process whereby the mRNA transcript is used to synthesize an amino acid sequence, which eventually becomes a protein.
Based on this, the correct order of sequence of events given in this question will be:
- As the DNA sequence varies, the mRNA sequence that is created during transcription varies (transcription).
- The amino acid sequence built from the mRNA varies (translation).
- This causes the structure of the protein to be different because different amino acids are used.
- Since the structure of the protein determines its function we see variation in the traits expressed due to how that protein ultimately functions based on its shape.
DO NUMBER 3 FOR 50 POINTS
Answer:
nucleotides
Explanation:
Please help me with number 4
Which best describes trees in temperate regions?
they have rings that form each season
the annual rings indicate secondary growth
the hormone abscisic acid is release each Autumn
all of the above
Gram-positive bacteria stain
with Gram stain.
Purple
Green
Blue
Orange
Answer:
Purple
Explanation:
Gram positive bacteria stain violet due to the presence of a thick layer of peptidoglycan in their cell walls, which retains the crystal violet these cells are stained with.
The number of known species is about_____million?
A 17 million
B 1.7 million
C10.7 million
D11.7 million
What would happen to the concentration of acetic acid in the presence of disulfiram
Answer:
Disulfiram is a drug used to support the treatment of chronic alcoholism by producing an acute sensitivity to ethanol by inhibiting the enzyme acetaldehyde dehydrogenase, an enzyme which catalyze the conversion of acetaldehyde into acetic acid. Thus, in the presence of disulfiram, the concentration of acetic acid is reduced
Which substances are cycled between living thing and non living environments?
Using the codon chart above, give one start codon and one stop codon. *
Answer:
start codon AUG
stop codon UGA
Which option lists materials in order by their ability to allow the flow of
electrons, from least easily to most easily?
A. Insulator, semiconductor, conductor
B. Conductor, semiconductor, insulator
c. Semiconductor, insulator, conductor
O D. Semiconductor, conductor, insulator
The correct option that lists materials in order by their ability to allow the flow of electrons, from least easily to most easily, is Insulator, Semiconductor, and Conductor, which is in Option A.
What are an electron, an insulator, etc.?The ability of a material to conduct electricity depends on the number of free electrons that are available to move through the material. In an insulator, there are very few free electrons, which means that the material does not conduct electricity very well. Insulators are typically used to prevent the flow of electricity, for example, in electrical wiring, where plastic or rubber coatings are used to insulate the copper wires.
Hence, the correct option that lists materials in order by their ability to allow the flow of electrons, from least easily to most easily, is Insulator, Semiconductor, and Conductor, which is in Option A.
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A. Objective type questions
Choose the correct answer.
1. Which of the following is not transported by the xylem and phloem tubes on the stem?
a) Sugar
b) Water
c)
Carbon dioxide
d) Mineralsalt
Answer:
C) Carbon dioxide
Explanation:
Xylem and Phloem are tissues that majorly transport food and liquid components e.g water within a plant they are not responsible for transportation or gas e.g Carbon dioxide. The respiratory organs which are Stomata and lenticels are the ones in charge of that
Which of the following statements is true?
A.
All plant cells have at least one vacuole, but only some animal cells have vacuoles.
B.
All animal cells have at least one vacuole, but only some plant cells have vacuoles.
C.
Only a few animal and plant cells have vacuoles.
D.
All animal and plant cells have at least one vacuole.
Answer:
D
Explanation:
Animal and plant cell have vacuole but animal cell's is very small compared to the plant cell that is used to maintain water balance in the cell.
Which changes are environmental effects of farming?
A: Flooding
B: Soil Erosion
C: Increased Carbon Dioxide Levels
D: Habit Loss
is this true??? please someone give me the right answer
Everything except for meteorite