Answer:
Essential knowledge #1: Natural selection is a major mechanism of evolution. Essential knowledge #2: Natural selection acts on phenotypic variations in populations. Essential Knowledge #3: Evolutionary change is also driven by random processes
Explanation:
Essential knowledge #1: Natural selection is a major mechanism of evolution. Essential knowledge #2: Natural selection acts on phenotypic variations in populations. Essential Knowledge #3: Evolutionary change is also driven by random processes
Assume that three loci, each with two alleles (A and a, B and b, C and c), determine the differences in height between two homozygous strains of a plant. These genes are additive and equal in their effects on plant height. One strain (aa bb cc) is 10 cm in height. The other strain (AA BB CC) is 22 cm in height. The two strains are crossed, and the resulting F1 are interbred to produce F2 progeny. Give the phenotypes and the expected proportions of the F2 progeny.
Explanation:
In the given question, the trihybrid cross has been provided for the height trait and it is provided that recessive alleles (aabbcc) contribute 10 cm whereas dominant allele (AABBCC) contribute 22cm.
The height contributed by each dominant allele (A+A+B+B+C+C)= 22cm
The height contributed by each recessive allele (a+a+b+b+c+c)= 10 cm
The dominant genotype is 12 cm taller than recessive genotype which indicates that dominant allele contributes 2 cm.
In trihybrid cross-64 genotype will be formed with these dominant allele based on which the height of the plant will be determined.
The genotype with dominant allele (Height) and F2 progeny are
0 (10cm) - 1/64
1 (12cm)- 6/64
2 (14cm)- 15/64
3 (16 cm)- 20/64
4 (18cm)- 15/64
5 (20 cm)- 6/64
6 (22 cm)- 1/64
Answer:
Given,
aabbcc = 10 cm
AABBCC = 22 cm
The genes are additive which means that each dominant allele will contribute to the overall height. The base minimum height is 10 cm (no dominant allele) and the maximum height is 22 cm (all six dominant alleles). Thus, six dominant alleles contribute 12 cm of height to the base height, which means that each dominant allele adds 2 cm of height.
When, aabbcc X AABBCC :
AaBbCc ( F1 )
When, AaBbCc X AaBbCc :
7 types of phenotype is possible. They are:
6 dominant alleles = 22 cm
5 dominant alleles = 20 cm
4 dominant alleles = 18 cm
3 dominant alleles = 16 cm
2 dominant alleles = 14 cm
1 dominant allele = 12 cm
0 dominant allele = 10 cm
They will be in the ratio = 1 : 6 : 15 : 20 : 15 : 6 : 1 as given by the ratio of additive effect governing three loci. The intermediate phenotype ( 16 cm ) will be maximum in number and the numbers will decrease as we move to the extremes.
Many organisms depend on the land as a food source. Seasons can affect the amount of food that is available to these organisms. How would a long, cold winter most likely affect a population of deer?
The deer population will decrease.
The deer population will increase.
The deer population will remain almost the same.
The deer population will rebound the next year.
The deer population decreasing will most likely affect a population of deer.
What is a Population?This can be defined as the number of organisms in a given area over a period of time.
Winter season is characterized by unavailability of plants for grazing due to the harsh weather condition which will lead to starvation and a decrease in the deer population.
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A long, cold winter is likely to decrease the population of deer due to reduced food availability and increased stress and mortality rates.
Why cold winter affects deer population?A long, cold winter is likely to have a negative effect on the population of deer. This is because during a long, cold winter, the availability of food for deer can become scarce, especially if the winter is severe and there is a lot of snow on the ground. The snow can make it difficult for deer to access their food sources, such as grasses and shrubs. This can lead to malnutrition and starvation in some individuals, which can cause a decline in the population.
Additionally, a long, cold winter can also affect the reproductive success of deer. If the winter is too harsh, it can cause stress and illness in pregnant does, leading to fewer fawns being born in the spring. This can also contribute to a decline in the deer population.
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What is the name of the system of measurement used by most countries
around the world?
Answer:
The International System of Units
Explanation:
(SI, abbreviated from the French Système international (d'unités)) is the modern form of the metric system. It is the only system of measurement with an official status in nearly every country in the world.
Tropomyosin is a rod-shaped protein with a mass of 70 kDa and a sedimentation coefficient of 2.6S. Hemoglobin is a spherical protein with a slightly smaller mass of 65 kDa, but a much higher sedimentation coefficient of 4.31S. Which property of tropomyosin accounts for its slow sedimentation?
a. high particle density
b. elongated shape
c. high mass
d. low partial specific volume
e. overall net charge
Answer:
Explanation:
m
The universe consists of many different galaxies, which, in turn, consist of many different solar systems. Each solar system has a central star around which planets orbit.
Earth, for example, is a planet that orbits the Sun in the Solar System. The Solar System is one of many that can be found in the Milky Way galaxy.
This example demonstrates that
Answer:
Earth and the sun are a part of the solar system
An object is located 8 cm away from a convex lens. The image is 24 cm away from the lens on the other side. What is the focal length of the lens?
A. 4 cm
B. 6 cm
C. 16 cm
D. 32 cm
Answer: B. 6 cm
Explanation:
First we take down the information given to us,
distance from the lens to the image (v) = 24cm
distance from the original object to the lens (u) = 8cm
So using the formula
1/u + 1/v = 1/f
Where f is the focal length
So we just input our information
1/8 + 1/24 = 1/f
Therefore;
3/24 + 1/24 = 1/f
4/24 = 1/f
1/6 = 1/f
f = 6
Our focal length = 6cm
Answer:B.6
Explanation:
:)
What is meant by the term dynamic ecosystem
Answer:
Dynamic ecosystem refers to the ever changing cycles of our diverse ecosystems.
Explanation:
They are dynamic for both tor the smallest to the largest changes. These changes or dynamics are necessary for the ecosystem to survive.
Huntington’s disease: Huntington’s disease is a disease in which certain parts of the brain waste away; symptoms usually begin later in life. In a community in Venezuela, an allele for Huntington’s disease (represented by the letter H) is completely dominantto the allele for no Huntington’s disease (represented by a lowercase h). The three possible parental genotypes are HH, Hh, and hh. There are six possible crossings that can be made between these genotypes (for example, HHxHH, HHxHh, etc.). Show the probabilitiesof the genotypesandphenotypesin the F1 generation from all sixpossible crossings.
Answer:
HH x HH, HH x Hh, HH x hh, Hh x Hh, Hh x hh, hh x hh.
Explanation:
In a community in Venezuela, an allele for Huntington’s disease (represented by the letter H) is completely dominant to the allele for no Huntington’s disease (represented by a lowercase h).
The three possible parental genotypes are HH, Hh, and hh.
There are six possible crossings that can be made between these genotypes. These are HH x HH, HH x Hh, HH x hh, Hh x Hh, Hh x hh, hh x hh.
HH x HH
Genotype: All HH
Phenotype: all express the huntington's disease (prob: 1)
HH x Hh
Genotype: 1/2HH 1/2Hh
Phenotype: all express the huntington's disease (prob: 1)
HH x hh
Genotype: All Hh
Phenotype: all express the huntington's disease (prob: 1)
Hh x Hh
Genotype: 1/4HH, 1/2Hh, 1/4hh
Phenotype: 3/4 express the disease, and 1/4 do not express the disease
Hh x hh
Genotype: 1/2Hh 1/2hh
Phenotype: 1/2 express the disease, and 1/2 do not express the disease.
hh x hh.
Genotype: All hh
Phenotype: All do not express the huntington's disease (prob: 1)
Which of the following best explains how a hurricane can increase an area’s susceptibility to future storms? a. Storm surges cause massive damage to buildings along coastlines. b. Hurricanes often flood coastal communities. c. Hurricane strength winds cause large amounts of property damage. d. Erosion caused by hurricanes can leave coasts more exposed to storms. Please select the best answer from the choices provided A B C D
Correct answer choice is:
d. Erosion caused by hurricanes can leave coasts more exposed to storms.
Explanation:
Important erosion, rapture, and removal of solids happen through storms. Beach erosion is a typical consequence of the high waves that transpire when hurricanes pass onto land. The decline of sand makes the beach to grow narrower and deeper in elevation. Storm loops take the sand offshore, keeping and depositing the sediment in great sandbars.
pls mark
Two boats are operating near each other. One of these boats must take early and substantial action to keep well away from the other boat. Which is the boat that must take action?
Answer:
The boat is referred as the give way boat
Explanation:
The give way boat is the one who is meant to take any action and must take early and substantial action to keep well away from the other boat.while the other boat is meant to sail on the sea normally. This is used in the prevention of accidents on the sea as a result
Of the two boats trying to maneuver their way at the same time.
How many deciliters are in 8.12 decaliters?
deciliters
Answer:
812
Explanation:
You just want to multiply it by 100.
Answer:
the answer to your promblem is 812
Which atmospheric layer prevents meteroids from reaching earths surface
Answer: Mesosphere layer i believe
Explanation: i had to do an essay on this before but i forgot alot of it
Answer:
Mesosphere
Explanation:
The temperature drops in this layer to about -100 degrees Celsius. This is the coldest region of the atmosphere. This layer protects the earth from meteoroids.
Where are most of the nutrients from your food absorbed?
Where does your organism live? Describe its habitat.
i need help in biology both questions!!
Answer:
4. a) Monoculture
5. c) Fossil fuels
Explanation:
4. a) Mono culture is the practice of cultivating one crop on a given land. Completely opposite to multiple cropping.
5. c) Fossil fuels provide energy to industries as industries get energy from mining. Therefore fossil fuels is an logical answer.
Which statement best describes the limits of science?
Answer:
Science cannot answer philosophical answers.
Answer:
No scientific theory can ever be proven true.
Physics has two tremendously good theories: Einstein’s Theory of Relativity, and Quantum Field Theory.
These have been around for about a century and no contradictions have shown them to be false.
And yet these theories contradict each other, so one or both will eventually be supplanted.
Explanation:
Science is based upon evidence. And no matter how much evidence you have for a theory, it is impossible to say it is true.
Thus, truth is beyond what science if capable of.
26. The perimeter of a rectangle is 58cm. If the length is
18cm find it width.
Answer:
The width is 11cm
Answer:
11 is the width
Please answer this...
Answer:
b, d
Explanation:
What are two examples of decomposers that break down animal skin?
Answer:
A decomposer is an organism that breaks down organic materials from dead organisms to obtain energy. These organisms are basically living recycling plants. Fungi, worms, and bacteria are all types of decomposers.
which of the following is an example of mechanical weathering
Answer:
Examples of mechanical weathering include frost and salt wedging, unloading and exfoliation, water and wind abrasion, impacts and collisions, and biological actions. All of these processes break rocks into smaller pieces without changing the physical composition of the rock.
Explanation:
Mechanical weathering involves mechanical processes that break up a rock: for example, ice freezing and expanding in cracks in the rock; tree roots growing in similar cracks; expansion and contraction of rock in areas with high daytime and low nighttime temperatures; cracking of rocks in forest fires, and so forth.
What is green building?
Answer:
Green building refers to the application of processes that take place throughout a building's life-cycle including planning, designing, construction, maintenance, renovation.
Explanation:
Green building is also known as green construction or sustainable building. It refers to the application of processes that take place throughout a building's life-cycle including planning, designing, construction, maintenance, renovation. All of these processes are environmentally responsible and resource-efficient. Green building ensures efficient use of land, energy, water, and materials.
Answer:
It is the practice of maximizing the efficiency with which buildings and their sites use resources (energy, water, and materials).
It is the practice of minimizing building impacts on human health and the environment.
Green building is also known as sustainable or high-performance building.
Explanation:
Edu 2021
Question 25 of 34
1 Point
Which of the following describes the structure of nucleic acids?
A. Nucleic acids consist of carbon, hydrogen, and oxygen only.
B. Nucleic acids are formed when a glycerol molecule joins with
three fatty acids.
C. Nucleic acids are long chains of nucleotides.
D. Nucleic acids are made of long chains of sugar molecules.
why the bio remediation is a series of processes for wastes?
Answer:
It is a series of processes for waters because it break down organic substances in water so that it will not result or cause pollution when water is released into the environment.
Explanation:
Bio remediation is a natural process in which microorganisms is use to clean and treat contaminated water, soil and surface. This process ensure the growth of microorganisms that feed on the contaminants present in the such contaminated media. It can be use to kill oil souls and other contaminated media. It is use as series of process in water so as to break down organic substances or contaminants in water so that it will not cause pollution when the water is released.
How are the carbon, nitrogen, and oxygen cycles similar
Answer:
Well I'm not sure if my answer is correct though but in all these cycles it involves the replenishment of air in ecosystem depending on the organisms which use it.
1st question ??? biology
Answer:
A
Explanation:
Early groups of hunter gatherers continued to move south. They would eventually settle down in areas such as central america, with civilizations such as the Aztecs and the Mayans.
Answer: if you ask me I would say d if Im correct
Explanation:
To be effective, key choices must be
Why do cats purr?///////////////
Answer:
Cats also purr when they are nervous or in pain, leading some experts to believe that this uniquely feline vocalization is actually a method of self-healing. A domestic cat's purr has a frequency of between 25 and 150 Hertz, which happens to be the frequency at which muscles and bones best grow and repair themselves.
Explanation:
Answer:
it is there defense mechanism
Explanation:
they purr because that is there defense mechanism. They also a way to keep calm i very stressful situations.
How are photosynthesis and cellular respiration related
Answer: Photosynthesis makes the glucose that is used in cellular respiration to make ATP. The glucose is then turned back into carbon dioxide, which is used in photosynthesis. While water is broken down to form oxygen during photosynthesis, in cellular respiration oxygen is combined with hydrogen to form water.
Explanation: Photosynthesis makes the glucose that is used in cellular respiration to make ATP. The glucose is then turned back into carbon dioxide, which is used in photosynthesis. While water is broken down to form oxygen during photosynthesis, in cellular respiration oxygen is combined with hydrogen to form water.
Which is the largest group of mollusksWhich is the largest group of mollusks?
Answer:
gastropods
Explanation:
The largest group is the gastropods
Answer:
gastropods
Explanation:
If a plant has a genotype Rr, what is the probability it will produce a gamete that’s is R?
A) 25%
B) 50%
C) 0%
D) 100%
Answer:
B 50percent I think
Explanation:
correct me if I'm not sure
If a plant has a genotype of Rr, then the probability that it will produce a gamete that is R is 50%, which is present in option B. 50% represents the R, and the remaining 50% represents the r.
What are the gametes?The gametes are the products of the cells that undergo meiosis, and by the law of segregation, the alleles can segregate and the gametes are formed by the law of independent assortment. The alleles in this case are the R and r that are present on the chromosomes, and according to the segregation rule, half of the cells get the R allele and the other half get the r type of allele.
Hence, if a plant has a genotype of Rr, then the probability that it will produce a gamete that is R is 50%, which is present in option B. 50% represents the R, and the remaining 50% represents the r.
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