Answer:
the genotypes for the original parents must have been Dd x dd
Explanation:
Maternal inheritance refers to those cases in which certain phenotypic traits depends on the maternal genotype, independently of the individual genotype. In a cross, the genotype follows the Mendelian model, but the phenotype is influenced by the maternal genotype. The phenotypic traits of generations F1, F2, F3, and so on, do not correspond to the expression of their own genes, but ti the expression of the maternal genes.
Maternal inheritance has been studied in the Lymnaea species. In gasteropods, the dextral coil is clockwise, while the sinistral coil is counter-clockwise. Dextral is expressed by the dominant allele (D), while sinistral is expressed by the recessive allele (d).
In the exposed example:
The snail contributing the eggs (females) was dextral but of unknown genotype --> D-Both the genotype and the phenotype of the other snail are unknown.All F1 offspring exhibited dextral coilingIn the F2, One-half produced only dextrally coiled offspring, whereas the other half produced only sinistrally coiled offspring.Cross)
Parental) D- x --
F1) 100% dextral (The whole progeny exhibited the dextral trait because the
individual that contribute the eggs was dextrally coiled)
F2) 50% dextral
50% sinistral
The fact that the F2 expresses 50% sinistral and 50% dextral means that one of the progenitors that contributed with the eggs (female) must have had at least one of the dominant allele D for the dextral trait, while the other female must have had the recessive genotype dd for the sinistral trait.
So the genotypes for the original parents must have been Dd x dd
1st Cross:
Parental) Dd x dd
The snail contributing the eggs Dd
the snail contributing the sperm dd
F1) 2/4 = 1/2 Dd
2/4 = 1/2 dd
100% expressing dextral coiling
2nd Cross:
Parental) Dd x Dd dd x dd
F2) 1/4 DD 100% dd
2/4 Dd 100% Sinistral coiling
1/4 dd
100% Dextral coiling
50% of the F2 exhibited dextral coiling, while the other 50% exhibited
sinistral coiling
Which animal is an amphibian?
O A duck
B. frog
C. turtle
O D. whale
Answer:
frog
Explanation:
I need this by today pls help
Answer:
the first questions answer is A your investegation failed because the data didnt support the hypothesis
the second question is C i believe.
triglycerides are composed of glycerol and fatty acid chains..
Answer:
bonded to a single glycerol molecule.
Explanation:
Name types of Muscle ?
Answer:
Cardiac, smooth and skeletal
Answer:
There is cardiac, smooth and skeletal muscle.
Explanation:
Cardiac muscles are the ones in your heart, they are involuntary and need to be strong. Smooth muscles are found in other organs, and they too are involuntary. Skeletal muscle are attached to your skeletal system, so when you contract or relax them you can move your body.
Question 6 of 11
If a scientist gets unexpected results during the first trial of an experiment,
what should he or she do next?
A. Change the data to match expectations,
B. Repeat the experiment to be sure the results are valid.
C. Reject the scientific theory not supported by the results.
D. Publish only the expected data.
Answer:
Repeat the experiment the be sure the results are valid
Explanation:
Answer: Repeat the experiment the be sure the results are valid
Explanation:
What are the two main types of cells and what are
the main differences between them?
Answer:
Eukaryotic and prokaryotic
Explanation:
eukaryotic contains a nucleus but prokaryotic doesn't
Agent that kills bacterial upon exposure:_____.
Answer: The answer would be disinfectants
Explanation:
Answer:
Bacteriocidal.
What volume of water can be pumped to maintain water budget balance in this area?
40
30
20
10
Answer:
30 volume of water can be pumped to maintain water budget balance in this area?
What is missing from the x-axis?
1.title
2.units of measurement
3.data points
Answer:
first one: yeast fermentation over time
second one: units of measurement
third one: y-axis title & units
Explanation:
A student made a model of a river in a sandbox. A pile of
sand represents soil and bits of rock in the riverbed. Water
pouring from a hose represents river water as it flows
downhill.
Which two characteristics are limitations of the student's
model?
A. The model is much smaller than a real river.
B. The model is missing plants, fish, and other details
found in a real river.
C. The model soil is nothing like the soil found in a real
riverbed.
D. The model river water flows downhill instead of
uphill like real river water does.
The two characteristics that are limitations of the student's model are:
A. The model is much smaller than a real river.
B. The model is missing plants, fish, and other details found in a real river.
The first limitation of the student's model is that it is much smaller than a real river. A sandbox model cannot accurately represent the scale and size of a natural river system. Real rivers can span for miles with varying widths and depths, while a sandbox model is limited in size and cannot capture the full complexity of a river's dimensions.
The second limitation is that the model is missing plants, fish, and other details found in a real river. A real river ecosystem consists of diverse flora and fauna, including vegetation along the riverbanks, aquatic plants, fish, insects, and other organisms. These elements play crucial roles in the functioning and dynamics of a natural river system. However, the student's model does not include these essential components, limiting its ability to represent the complexity and ecological interactions present in a real river.
The model soil is not like the soil found in a real riverbed. In natural riverbeds, the soil composition is influenced by geological processes, weathering, sedimentation, and organic matter deposition. The pile of sand used in the student's model may not accurately mimic the intricate mixture of soil and rock particles found in a real riverbed, thereby limiting the model's ability to replicate the diverse characteristics and interactions within the soil environment.
Although not explicitly mentioned in the question, it is worth noting that the model river water flows downhill instead of uphill like real river water does. This discrepancy can be considered a limitation if the student's intention was to replicate the natural flow of water in a river. However, if the focus was solely on demonstrating the concept of water movement, this limitation may be less significant.
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A particle that orbits the nucleus
an atom is called a(n)
Answer:
electron
Explanation:
Carbon dioxide dissolved in water is what gives soda it's fizz. What is the solvent in this solution?
carbon dioxide
water
carbon
there is no solvent because carbon dioxide is a gas
100pts and brainleast
Answer:
The correct answer would be - Water.
Explanation:
Soda is a solution that has water, sugar, flavorings, carbon dioxide as its components. Carbon dioxide is dissolved under pressure in the water with other solutes like sugar and flavorings. Carbon dioxide is a gas however it is still is a solute.
Water is the component of soda that is solvent as all other components dissolve in it. Water is solvent in this solution of water, sugar, flavorings, carbon dioxide as its components. Carbon dioxide.
Thus, the correct answer is - water.
Answer: Hi Uncle
Explanation:
what is the purpose of having distilled water as one of your test substances?
Distilled water does not have any cellular or mineral contamination. It is used in experiments for accurate results.
What is distilled water?It is a type of water that is completely purified of any kind of impurities. It does not have any minerals, salts, or organic materials.
Distilled water is the liquefied stream. When the water is boiling, it turns into a stream. This is collected and the steam is turned back to liquid. The steam doesn't carry an impurity of water with it and so distilled water formed from steam is also devoid of any impurities.
Distilled water is safe to drink but it will not taste anything like regular water. The water in our homes is supplied with minerals. These minerals are required for various processes in our body. Distilled water doesn't have any such minerals. Hence it's safe to drink but it's not beneficial.
Therefore, distilled water is used in experiments as there is no chance of contamination or reaction with this. This is used as a control against the test substances.
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In skeletal muscle cells, calcium ions bind to the _____ molecule.
Answer:
Explanation:The arrangement of myofilaments
Answer:
In skeletal muscle cells, calcium ions bind to the troponin molecule.
Explanation:
hope it help ^_^
Who first identified DNA? Rosalind Franklin Erwin Chargaff Friedrich Miescher James Watson
Answer:
Friedrich Miescher
Explanation:
In 1869, Friedrich Miescher isolated "nuclein," DNA with associated proteins, from cell nuclei. He was the first to identify DNA as a distinct molecule.
Friedrich Miescher was the first to identify DNA. Details about DNA can be found below.
What is DNA?DNA also called deoxyribonucleic acid is the part of a living being that carries or stores genetic information.
Others are of the opinion that American biologist James Watson and English physicist Francis Crick discovered DNA in the 1950s.
However, this is untrue as DNA was first identified in the late 1860s by a Swiss chemist names Friedrich Miescher.
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Juan, a biologist, notices that a particular group of hummingbirds leaves during the colder winter months and returns during the warmer spring months. Juan hypothesizes that the birds fly south to locations with warmer weather and blooming flowers during the winter months. Which procedure should Juan use to test his hypothesis?
This question is incomplete because the options are missing; here is the missing section:
Which procedure should Juan use to test his hypothesis?
A. Survey northern and southern residents about the birds in their areas.
B. Observe the direction the birds fly when they depart in the winter.
C. Tag the hummingbirds with transmitters and track their movement.
D. Set up observation posts in the south to verify the time of year that birds arrive.
The answer to this question is C. Tag the hummingbirds with transmitters and track their movement.
Explanation:
To prove or disprove his hypothesis about birds Juan needs to test the direction hummingbirds fly to during the winter because only in this way he can know if the birds fly to the South as he thinks or they go to a different place. Moreover, this can better be tested through precise instruments such as trackers because these will register the movement of birds and clearly show if they are going to the South. Moreover, others such as the opinions of residents or the initial direction when birds migrate might be inaccurate.
What is true about a Producer's role in the ecosystem?
A. Producers create energy for the other trophic levels to use.
B. Producers consume other trophic levels to pass their energy up the food chain.
C. Producers capture the energy from the sun for all other trophic levels to use.
D. Producers recycle nutrients back into the food chain
Answer:
D
Explanation:
Producers, also known as autotrophs, make their own food. They make up the first level of every food chain. Autotrophs are usually plants or one-celled organisms. Nearly all autotrophs use a process called photosynthesis to create “food” (a nutrient called glucose) from sunlight, carbon dioxide, and water
Answer:
D
Explanation:
Help ASAP ... I’ll give you 15 points ... I need the answer
As more and more CO2 dissolves in the oceans:
a. The ocean pH will go up.
b. Sea level will go down.
c. The rate at which oceans take up CO2 will increase.
d. Marine animals that make their shells out of calcium carbonate will suffer.
What does CITES regulate? (Biology)
Answer:
(the Convention on International Trade in Endangered Species) of Wild Fauna and Flora
Explanation:
What characteristics of a northwest coniferous forest biome make it an appropriate home for banana slugs
Answer:
It is a humid place that helps them to hide in places according to their corporal environment. They are scavengers on the forest floor that feed on small animals (already dead), but most of them are decomposers, feeding on debris.
Explanation:
The characteristics of a northwest coniferous forest biome that makes it an appropriate home for banana slugs is due to the fact that it's a humid place and this helps the banana slugs hide from their enemies.
The northern coniferous forest biome can be found below the tundra and it extends across Canada. It's also referred to as the boreal forest. It has a warmer and longer growing season.Some examples of animals that can be found in the northwest coniferous forest biome include moose, red fox, owl, snowshoe hare, etc.It should be noted that due to the fact that the northwest coniferous forest biome is humid, banana slugs protect themselves. They typically stay moist in order to stay alive. They also produce mucus which is used for self-defense.In conclusion, banana slugs hide in damp places in order to retain their body moisture.
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Which statement best describes why a machine is useful?
A machine does a greater amount of work than the amount of work that is done on it.
A machine does a smaller amount of work than the amount of work that is done on it.
A machine can decrease banka the input force and the input distance needed to do a given amount of work.
A machine can decrease either the input force or the input distance needed to do a given amount of work.
Mark this and return
Save and Exit
Next
Submit
Answer:
machine can decrease banka the input force and the input distance needed to do a given amount of work.
Answer:
The answer is D) A machine can decrease either the input force or the input distance needed to do a given amount of work.
Explanation:
Answers to Lesson 2: Introduction to Machines
1. D) A machine can decrease either the input force or the input distance needed to do a given amount of work.
2. D) It allows a smaller force to be applied over a longer distance.
3. B) 2
4. B) 1
5. D) 83%
6. D) 400 m
I took the quiz these are 100% correct
hope this helps :)
How does interphase prepare cells for mitosis?
rest prior to cell division
growth of cell and replication of DNA
dissolution of nucleus and cell membrane
division of cytoplasm
Answer:
the first one
Explanation:
rest prior to cell division
Answer:
It's a
Explanation:
Alicia conducted an experiment to find out which insulating material holds in the most heat. She did multiple trials of each test and recorded observations of each trial. Why did Alicia do more than one trial? to improve the variability of her data to prevent other people from using the data incorrectly to help in arriving at a conclusion even with inaccurate data to reduce the likelihood of errors in the experiment
Answer:
ITS D
D: to reduce the likelihood of errors in the experiment
Explanation:
Edge 2021
Is being evergreen a good characteristic for classifying plants? Why and why not?
Answer:
No it’s not a good characteristic for classifying plant
Explanation:
A student is trying to find out if people prefer vanilla ice cream or chocolate ice cream. She buys several
containers of regular chocolate ice cream and low fat vanilla ice cream. She hands out small sample of each
flavor to the testing group she has gathered and asks them 5 minutes later which one was their favorite. Of the
100 people she tested, 80 said they prefer the chocolate ice cream.
This situation is an example of
A)
personal bias
B)
experimental bias
C)
cultural bias
D)
a controlled experiment
Answer:
B. Experimental Bias because she she bought chocolate, but then she bought lowfat vanilla ice cream unknowingly. Therefore, the people liked more of the chocolate ice cream.
Hope this helped :3
Explanation:
Which type of strength training uses machine-generated forces to increase muscle strength and endurance? A. bench pressing B. power lifting C. resistance training D. core training
Answer:
C. resistance training
Explanation:
What three things does something need to have in order to be considered living?
Answer:
air water and food
Explanation:
all living things need air, water, and food.
How many blood cells do you have if you pop a artery
Answer:
Too many
Explanation:
Which of the following is an example of a biochemical adaptation?
a. camouflage
b. migration
c. being immune to scorpion stings
d. razor sharp teeth
Answer:
c.
Explanation:
over time you adapt to be immune to scorpio stings
Being immune to scorpio stings is an example of a biochemical adaptation. Thus c is correct option.
What is biological adaptation?
A biological adaptation is defined as physical change in an organism that allow the organism to survive in their environment. Adaptation can be seen in three form i.e structural behavioral and physiological.
Adoption has been described from the time ancient Greek philosophers known as Aristotle.
In the process of adaptation the source of all genetic variation there would be no genetic changes occur.
When there is increase in mutation genetic change occurs in a population.
Adaptation is generally relates to biological fitness which is responsible for rate of evolution due to change in allele frequencies.
Therefore, being immune to scorpio stings is an example of a biochemical adaptation. Thus, c is correct option.
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4. The formation of igneous rocks is powered by
a. internal heat. b. the rock cycle.
c. erosion.
d. the sun.
Can somone please help me
Answer:
Internal heat
Explanation:
I did this in the 4th grade
