Answer:
The correct answer is option D. ethylene.
Explanation:
Ethylene is a simple complex plant hormone and is created or produced by all organs. Ethylene is a gaseous hormone. It is transported through the spaces between cells of plants. It is responsible for fruits ripening, and causing abscission or leaves to be shed.
Ethylene promotes or flower formation in specific types of plants such as mangoes, lychees, and pineapple.
Thus, the correct answer is option D.
The frequency of alleles in a population that is in hardy Weinberg equilibrium?
a . Changes in each successive generation
b. Is less important than the frequency genotypes
c. shows evidence of the process of natural selection
d. Remains the same over several generations
The answer would be D.
HWE states that genotype and allele frequencies in a population remain constant from generation to generation when evolutionary influences are absent(such as gene flow or natural selection).
Final answer:
The frequency of alleles in a population that is in Hardy-Weinberg equilibrium remains the same over several generations as long as no evolutionary forces act on them. If frequency changes are observed, it indicates that the population may be evolving.
Explanation:
The Hardy-Weinberg principle outlines the conditions under which the frequency of alleles in a population remains constant over generations. This equilibrium assumes that no evolutionary forces are acting on the allele frequencies. The correct answer to the question is d. Remains the same over several generations. The principle hook on an ideal situation where there is no natural selection, no mutations, no gene flow, no genetic drift, and random mating occurs. If these conditions are met, the allele frequencies should remain unchanged from generation to generation, which implies that the population is not evolving. However, if observed allele frequencies deviate from expected values, scientists can infer that evolutionary forces are influencing the population.
Describe the structure of a phospholipid
The phospholipids are composed of an alcohol group, generally glycerol or sphingosine, to which two long chain fatty acids and a phosphate group are attached. The phosphate group is at one end and forms a structure known as a "polar head," and is the hydrophilic part of the molecule, while long chain fatty acids form what is known as "apolar tail" or hydrophobic tail. Phospholipids in an aqueous medium form miscelas, structures where the phosphate group's polar heads are in contact with the aqueous medium, while hydrophobic tails are oriented inwards (something similar to oil drops in water). In the cells, both the internal medium (cytoplasm) and the external medium are aqueous media, therefore phospholipids, which are the major component of cell membranes, are oriented forming lipid bilayers. The polar heads are oriented towards the inner cell in the inner layer, and to the cellular bacteria in the outer layer. The hydrophobic tails are oriented towards the inside of the bilayer.
Which of these is a landform created due to erosion by glaciers? Delta Horn Sandbars Spit
The answer is option B "horn." The land form horn was formed because when glaciers erode down to form a sharp peak which is called a horn. All of the other options are false because none of those land forms are formed because of the erosion of glaciers only horns are.
Hope this helps.
Answer:
its horn i got that question correct on my 3.09 segment 1 exam
Explanation:
Which would be the outcome in a fertilized egg if the process of meiosis did not occur?
twice as many chromosomes as the parents
half as many chromosomes as the parents
same number of chromosomes as the parents
triple the number of chromosomes as the parents?
Answer:
half as many chromosomes as the parents
Radiometric dating is used to tell the absolute age of materials by studying the decay rate of radioactive isotopes. The decay rates of isotopes are constant and are expressed as .
Answer:
Half Lifes
Please mark for brainliest!! :D Thanks!!
If you have any questions or need more information, please comment below and I'll respond asap!!
Answer:
Half life
Explanation:
The radioactive dating method is usually used to date a rock or a fossil in order to determine its relative age. The unstable isotope elements decays at a certain rate, which normally remains constant and are generally expressed in terms of its half life. Half life is described as the time required by any isotope element to decay half of its original amount. This half life value varies from elements to elements. For example, the half life of Carbon-14 is approximately 5700 years. This half life of an unstable isotope element plays an important role in the radioactive dating method.
Up to what percentage of the world's flora consisted of cycads during the Triassic period?
100%
75%
50%
20%
Answer:
20%
Explanation:
Cycads were up to 20% of the global flora during the Triassic and Jurassic Periods.
Why do solar cells need an inverter? A. They need a way to share their excess energy with the electric company. B. Their energy output is alternating current. C. They need a way to store energy for cloudy days. D. Their energy output is direct current.
Answer:
D. Their energy output is in the form of direct current.
Explanation:
The inverter converts the DC to AC so that the appliances that use ac may function. They are mostly connected after the power storage appliances normally batteries before the consumption appliances. Inverters convert direct current electrical energy to alternating current at a given voltage and frequency.
Solar cells need an inverter to convert the direct current they produce into alternating current, which is used by household appliances and the power grid. the correct option is D. Their energy output is direct current.
Solar cells generate electricity through the photovoltaic effect, converting sunlight directly into electrical energy. The energy produced by solar cells is in the form of direct current (DC). However, most household appliances and the electrical grid operate on alternating current (AC). This is why solar cells need an inverter: to convert the DC electricity they produce into AC electricity that can be used in the home or fed back into the power grid. The correct answer to why solar cells need an inverter is D. Their energy output is direct current.
Why are small quantities of chlorofluorocarbons so harmful to the ozone layer?
a. The chlorofluorocarbons act like ultraviolet radiation causing large amount of ozone to be produced.
b. The chlorine from the chlorofluorocarbons reacts with free molecules of oxygen causing a stop in
ozone production
c. Free oxygen atoms can replace the chlorine in chlorine monoxide, releasing a free atom of chlorine
which can then recombine with an oxygen atom in ozone, destroying more ozone.
d. Chlorofluorocarbons absorb ultraviolet radiation, preventing the formation of ozone
Please select the best answer from the choices provided
Answer:
C
Explanation:
how can we reduce the impact of air pollution
Explanation:
On Days when High Particle Levels are Expected, Take these Extra Steps to Reduce Pollution:
1_Reduce the number of trips you take in your car.
2_Reduce or eliminate fireplace and wood stove use.
3_Avoid burning leaves, trash, and other materials.
4_Avoid using gas-powered lawn and garden equipment.
how is the moon illuminated?
Hello There!
The moon is illuminated because it reflects light from the sun. The brightness from the moon depends on where the moon is in its orbit around the planet.
Which functional group do you find in nucleic acids that are not found on carbohydrates or amino acids?
Hydroxyl
Amino
Carboxyl
Phosphate
Answer:
your answer is Phosphate group
The phosphate functional group is unique to nucleic acids, distinguishing them from carbohydrates and amino acids, which contain different functional groups.
Explanation:Among the options provided, the phosphate functional group is the one present in nucleic acids that you would not find in either carbohydrates or amino acids. Nucleic acids like DNA and RNA contain a phosphate backbone. Carbohydrates primarily contain hydroxyl groups, while amino acids are characterized by the amino and carboxyl functional groups. Therefore, the phosphate group differentiates nucleic acids from carbohydrates and amino acids in terms of functional groups.
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Vascular tissue in plants can best be compared to what part of our bodies
Answer:
Blood vessels
Explanation:
Answer:Blood vessel
Explanation:
Index fossils are A relatively rare and difficult to find. B fossils that are found in limestone. C fossils of species that still exist today. D imprints of organisms known to have lived during a specific time period.
Answer:
D. imprints of organisms known to have lived during a specific time period
Explanation:
The index fossils are very useful to the geologists. These fossils are only found in specific time period. They are also found on lot of locations around the globe, and they are in big numbers. Because of these characteristics, the index fossils are excellent for determining the relative age of rock layers, or other fossils, as they offer the basic information that are needed for this. This type of fossils tend to be small or medium sized ones, as usually the larger organisms do not have very large populations.
The ______ response is the basis for vaccination.
primary
secondary
tertiary
none of the above
Answer:
primary
Explanation:
The primary response is the basis for vaccination.
Hope this helps! Please mark brainliest!
Answer:
The answer is primary. The primary response is the basis for vaccination
A mutagen is
1: a living thing that has undergone a mutation.
2: an agent that causes a mutation in DNA.
3:a mutation that has affected one gene.
4:a chemical that can poison living cells.
Answer:
2: an agent that causes a mutation in DNA.
Hope this helps
which would stop Hardy-Weinberg equilibrium from happening?
Answer:
which would stop Hardy-Weinberg equilibrium from happening?
Explanation:
It is said that a population is in equilibrium when the alleles of the polymorphic systems maintain their frequency in the population through the generations.
To achieve genetic balance, several conditions must be met:
1.- The population must be infinitely large and the matings random.
2.- There should be no selection, that is, each genotype under consideration should be able to survive as well as any other.
3.- There must be no gene flow, that is, it must be a closed population where there is no immigration or emigration.
4.- There should be no mutations, except that the mutation occurs in the opposite direction with equivalent frequencies.
The answer is: A: Some individuals produce more offspring than others.
following are properties of compounds
Answer:
Compounds are made up of elements that are chemically joined. Like elements, compounds have properties that allow us to identify them. Learn about physical properties, like color, odor, melting point and boiling point, as well as chemical properties in this lesson.
Explanation:
I hope that help you out okay.
The properties of a compound can include changes in melting point, conductivity, and reactivity. An example is sodium chloride, which has very different properties from the elements sodium and chlorine.
A compound is formed when atoms of two or more different elements combine in fixed, whole-number ratios. These elements are chemically combined such that the result displays different physical and chemical properties compared to those of its constituent elements. For instance, sodium (Na) is a soft, highly reactive metal, while chlorine (Cl2) is a toxic gas; combined, they form sodium chloride (NaCl), a stable, edible crystal commonly known as table salt, which has a much higher melting point than either element alone.
These dramatic differences in properties underscore a key characteristic of compounds: they behave entirely differently from the elements that constitute them. The properties such as melting point, electrical conductivity, solubility, and acidity or basicity, change completely when elements form compounds. This characteristic is essential for understanding how elements combine and interact to form all the substances around us, from simple compounds like water to complex biomolecules that are the foundation of life.
During photosynthesis, plants use
to make sugars and starches.
A)oxygen and carbon dioxide
B)nitrogen and carbon
C)water vapor and sunlight
D)carbon dioxide and sunlight
During photosynthesis, plants use carbon dioxide and sunlight to make sugars and starches. The correct option is option D) carbon dioxide and sunlight.
Green plants, algae, and certain microorganisms transform solar light energy into chemical energy in the form of glucose through a process known as photosynthesis (sugar). Chloroplasts, specialized cell structures predominantly seen in plant leaves, are where this activity occurs.
Sunlight: Chlorophyll, a pigment found in chloroplasts, is used by plants to absorb solar light energy.
Carbon Dioxide (CO2): Via tiny pores on their leaves known as stomata, plants absorb carbon dioxide from the environment.
Chloroplasts: The collected light energy in the chloroplasts powers the production of glucose molecules from carbon dioxide and water.
Glucose Production: During the Calvin cycle, carbon dioxide and water molecules mix in the presence of light energy to create glucose (C6H12O6) and oxygen (O2).
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19.
Which is not true of animals?
They have coordinated movement.
They develop a blastula.
They make their own food.
They eat dead or living organisms.
Hello There!
They make their own food is not true of animals.
Animals can’t make there own food they need to hunt for it.
Which organism in this food web is an omnivore?
Answer: coati
Coati in this food web is an omnivore. i.e option c is correct
What is food web?Food webs describe the relationships — links or connections — among species in an ecosystem.
In given food web, the coati eats a variety of different fruits, nuts and seeds, along with insects, birds eggs, rodents and small reptiles such as lizards and snakes.
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What is biomass?
Organic matter that can be used as a fuel source
Natural resource that takes more than a lifetime to replenish
Alternative energy forms like solar energy and wind power that can be recycled
Renewable energy captured through using the heat of the Earth
Answer:
A) Organic matter that can be used as a fuel source
Answer:
A
Explanation:
I took the test
Research Question: Why are the carrots that grew on the
left side of the garden larger than the carrots that grew on
the right side of the garden?
Which hypothesis is based on this research question?
A comparison of people with gardens to people without gardens
will show who is likely to live longer.
B. Carrots are thought to be good for your eyesight and should be
eaten regularly.
C. Carrots that are provided lots of sunlight grow to a larger size than
carrots grown in the shade.
D. Eating fresh vegetables every day is a healthy thing to do.
Answer:
The correct answer is option C.
Explanation:
In a scientific method, a hypothesis is a well-substantiated idea or opinion made based on limited evidence for further investigation.
In the given question, the question has been asked based on the observation that "carrots grew larger on the left side than right side" based on which a hypothesis could be suggested which could be tested.
The most valid hypothesis from the options will be" the carrots with more exposure to sunlight will grow larger than which are not exposed to sunlight." This hypothesis can be tested easily by keeping the pots in the sunlight and results can be explained.
Thus, option C is the correct answer.
A tall pea plant (Tt) is crossbred with another tall pea plant (Tt). The Punnett square below shows the separated alleles for two pea plants. Punnett square showing female parent across the top with a phenotype of tall and a genotype of Tt and a male parent across the side with a phenotype of tall and a genotype of Tt. Inside the top left box 1 is written, inside the top right box 2 is written, inside the bottom left box 3 is written, inside the bottom right box 4 is written. Which of the following shows the correct match of the box numbers and the genotype of the offspring? 1 = Tt; 2 = tt; 3 = Tt; 4 = tt 1 = Tt; 2 = Tt; 3 = Tt; 4 = Tt 1 = TT; 2 = Tt; 3 = Tt; 4 = tt 1 = TT; 2 = TT; 3 = Tt; 4 = tt
Answer:
1=TT, 2=Tt, 3=Tt, 4= tt.
Answer: C: 1 = TT; 2 = Tt; 3 = Tt; 4 = tt
Explanation:
A normal human karyotype has
A karyotype is the number and appearance of chromosomes in the nucleus of an eukaryotic cell. The term is also used for the complete set of chromosomes in a species or in an individual organism and for a test that detects this complement or measures the number.
What Is a Karyotype?
A karyotype is simply a picture of a person’s chromosomes. In order to get this picture, the chromosomes are isolated, stained, and examined under the microscope. Most often, this is done using the chromosomes in the white blood cells. A picture of the chromosomes is taken through the microscope. Then, the picture of the chromosomes is cut up and rearranged by the chromosome’s size. The chromosomes are lined up from largest to smallest. A trained cytogeneticist can look for missing or extra pieces of chromosome.
karyotype[1]There are 22 numbered pairs of chromosomes called autosomes. The 23rd pair of chromosomes are the sex chromosomes. They determine an individual’s sex. Females have two X chromosomes, and males have an X and a Y chromosome.
How are the Chromosomes Numbered?
Each chromosome has been assigned a number based on its size. The largest chromosome is chromosome 1. Therefore chromosome 18 is one of the smallest chromosomes in humans.
Human karyotypes: 2n = 48 or 46?
Early studies of the human karyotype simply stained chromosomes within cells with Giemsa and "squashed" them between the cover slip and slide. Most cells were not at the proper mitotic phase for chromosomes to be observed, and chromosome separation was poor. The exact count was uncertain: most workers accepted the number 48. The breakthrough came in 1952 (left) when a technician in the lab of T. C. Hsu accidentally substituted distilled water for the normal saline solution used in washing the cells just before "squashing". This "hypotonic" treatment caused the cell nuclei to swell, and allowed the chromosomes to separate before squashing. A further refinement was "dropping" the cells onto the slide at arm's length, which caused the nuclei to burst on impact, further separating them (middle slide). Finally, the use of a plant spindle-poison Colchicine allows chromosomes to be arrested at mitotic metaphase, during their maximum state of compaction [right] These experiments quickly established the human chromosome number as 2n = 46 chromosomes.
Classification of chromosomes into seven groups by size and relative centromere position established the so-called "Denver System" (right) in 1960. Chromosomes within groups B - G were not readily distinguishable from each other. The X chromosome is in the C group, and the Y is in the G group: males are reconizable by five small G-type chromosomes. Modern banding techniques allow each chromosome in the karyotype to be distinguished individually.
Which of the following is not a defining characteristic of plants?
Answer: Plants are prokaryotic. -is not a defining characteristic of plants.
Explanation:
help............. now
Human cells have a size range between ___ and ___ micrometers (µm).
Answer:
10-100 micrometers.
Explanation:
Human cells have a size range between 10 and 100 micrometers (µm).
Answer:
10-100 (µm)
Explanation:
10-100 micrometers is the correct answer
Human cells have a size range between 10 and 100 (µm).
Restless tectonic plates move (shift) between one and fifteen centimeters per __________. year month day minute
Hello There!
Restless tectonic plates move (shift) between one and fifteen centimeters per "YEAR"
Tectonic plates move at a moderate around one and fifteen centimeters per year. The plates move in different ways, once in a while crashing into one another.
Answer:
YEAR
Explanation:
Explain how oxygen is cycled between the tree and the fox
torsion is carried out in what larvae stage
What is an extremophile? Give an example
a microorganism, especially an archaean, that lives in conditions of extreme temperature, acidity, alkalinity, or chemical concentration. hope this helps as an answer :)
.