Answer:
Central canal
Explanation:
running through the osteon
central canal or haversian canal,contains blood vessels,nerves and lymphatic vessels.
Egg of a bird represent an organ
It is a false statement that the egg of a bird represent an organ.
What is an organ?An organ is composed of many tissues that work together for the same purpose. Tissues in turn are composed of cells.
The egg of a bed is only composed of cells that divide rapidly hence the egg of a bird is not an example of an organ and the statement is false.
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draw a ppunnett sqare using the allele symbol H amd h to show the expected genotypes of the man and women biological children.
The Punnett square is used to make predictions about the genotype and phenotype of a future generation according to the alleles involved in the cross. 25% HH, 50% Hh, 25% hh.
What is a Punnett square?The Punnett square is a graphic representation that shows the different types of gamete combinations according to the alleles involved in a cross.
Punnett square shows the probabilities of getting offspring with different genotypes and their consequent phenotypes.
Let us assume that in the exposed example both parents are heter0zyg0us for the trait.
The feature is coded by a single diallelic gene in which H is the dominante allele and h the recessive allele.
Cross:
Parentals) Hh x Hh
Gametes) H h H h
Punnett square) H h
H HH Hh
h Hh hh
F1) Genotype
- 1/4 = 25% of the progeny is expeted to be h0m0zyg0us dominant, HH
- 2/4 = 1/2 = 50% of the progeny is expected to be heter0zyg0us, Hh
- 1/4 = 25% of the progeny is expeted to be h0m0zyg0us recessive, hh
Phenotype
- 3/4 = 75% of the progeny is expected to express the dominant trait
- 1/4 = 25% of the progeny is expected to express the recessive trait
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Why isa DNA replication regarded as semi conservative?
Answer:
each helix that is created contains one strand from the helix from which it was copied.
Explanation:
What is the role of gravity in our solar system?
Choose 1 answer:
Earth's gravity causes the sun and the other planets to revolve around it.
The sun's gravity causes Earth and the other planets to revolve around it.
Our solar system's gravity causes other star systems in the galaxy to revolve around it.
estions
1. What is selective breeding?
2. Name two characteristics cattle
have been selectively bred for.
3. How can you obtain wheat with
the characteristics you want?
4. The table on the right shows the
characteristics of two chickens,
Kendo and Bibby. If they have
offspring which characteristics
do you think the farmer would
want from each chicken?
Selective breeding is a technique to obtain offspring with desired traits, characteristics of cattle include meat and height, whereas wheat is obtained by crossing high yield plants.
What is Selective breeding?Selective breeding is a human technique used to obtain descendence (either plants or animals) from a given genetic cross.
This technique (selective breeding) is used in agriculture to obtain wheat with higher grain yields.
Two characteristics of cattle that have been human-driven selected include meat and average size (height).
It is possible to obtain wheat with desired features by crossing plants having desired genes (it is an autogamous plant).
The characteristics of the chickens (Kendo and Bibby) are not found here, but it is possible to select desired phenotypes by crossing them and selecting offspring.
In conclusion, selective breeding can be used to obtain offspring from a given genetic cross expressing desired traits.
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This plants seeds spread so that new plants will grow, which way will the seeds most likely spread.
Use the following information to calculate the correct frequencies: In a population of
Pennsylvanians, only 18% of individuals express the recessive trait of Syndactyly or webbed finger
(formulas: p+q=1 and p²+2pq+q2²=1)
a. What percentage of the population are not Webbed?
If we have the recessive genotypic frequency, we can calculate the phenotypic frequencies in a population in Hardy-Weinberg equilibrium. The percentage is 82%.
What si the Hardy-Weinberg equilibrium theory?The Hardy-Weinberg equilibrium theory states that allelic and genotypic frequencies remain the same through generations in a population that is in equilibrium.
The allelic frequencies in a locus are represented as p and q. Assuming a diallelic gene,
Allelic frequencies
The frequency of the dominant allele f(X) is pThe frequency of the recessive allele f(x) is qGenotypic frequencies after one generation are
• p² ⇒ H0m0zyg0us dominant genotypic frequency,
• 2pq ⇒ Heter0zyg0us genotypic frequency,
• q² ⇒ H0m0zyg0us recessive genotypic frequency.
The addition of the allelic frequencies equals 1
p + q = 1.
The sum of genotypic frequencies equals 1
p² + 2pq + q² = 1
Available data:
18% of individuals express the recessive trait of Syndactyly
Let us say that the dominant allele is A and the recessive allele is a.
The dominant allele A codes for normal finger.The recessive allele a codes for webbed finger.Assuming this gene expresses complete dominance,
H0m0zyg0us dominant and heter0zyg0us -AA and Aa- individuals have normal finger.Their frequency in the population is p² + 2pq.
h0m0zyg0us recessive -aa- individuals have webbed finger.Their frequency in the population is q².
Individuals that express Syndactyly have webbed finger and their genotype is h0m0zyg0us recessive, aa. Their frequency in the population is q².
q² = 18% = 0.18
We can get the frequency of individuals with normal fingers by clearing the following equation,
p² + 2pq + q² = 1
p² + 2pq + 0.18 = 1
p² + 2pq = 1 - 0.18
p² + 2pq = 0.82
The frequency of individuals with normal fingers is p² + 2pq = 0.82 = 82%.
The percentage of the population are not Webbed is 82%.
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in this phase of mitosis the cells DNA is replicated so that both daughter cells will have
Answer:
the same.
Explanation:
It is because mitosis is a cell of DNA and if the both daughter mitosis's DNA will have the same.
help...
The graph shows projected changes in the populations of the world. Based on the information in the graph, wich region is expected to have the least population growth over the period shown.
Europe
Asia
Africa
Australia
Based on the graph the region expected to have the least population growth will be Australia.
Graphical illustrationsLooking at the given graph the population size of each region starts at a lower point and ends at a higher point on the graph between the years 1950 and 2050.
The change in the population also varies depending on the scale on the y-axis. Australia has the lowest scale which lies between somewhere above 10 and 50.
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What happens to the temperature in
the various layers as you move away
from earth?
A. It remains constant.
B. It increases steadily.
C. It may decrease or increase, depending on the layer.
D. It increases within each layer, then decreases again.
Answer: C
Explanation:
In some layers, temperature increases with altitude and in others it decreases. The temperature gradient in each layer is determined by the heat source of the layer The four main layers of the atmosphere have different temperature gradients, creating the thermal structure of the atmosphere.
Normally, humans think of wildfires as
a negative thing. In which biome can
fire suppression have a considerable
impact?
A. desert
B. tropical rainforest
C. tundra
D. grassland
Answer:
D. grassland
Explanation:
Wildfires in grasslands can allow nutrients to return to the soil and allow plants to regrow.
What is spermatogenesis and sporophyte?
Answer:
Explanation:
1. Production of sperm by meiosis
2. diploid generation which alternates with haploid (in plants)
How do land animals remove gas liquid and solid waste materials?
Answer:
The corect phase sequence shown
Gas, Liguid, Solid
Lqud, Gas, Solid
Sold, Liguid, Gas
Gas, Solid, Liquid
above i
The air that enters and leaves the lungs during one quiet, resting respiratory cycle is called the
B functional residual capacity.
D tidal volume.
Which led most directly to the decline of the latin language?
oa. the death of joan of arc
ob. fear of witchcraft
oc. the great schism
o d. interest in poetry
The great schism was what led to the decline of the latin language and is denoted as option C.
What is Great schism?This was characterized by Christianity being divided into two divisions, Roman Catholic and Eastern Orthodox.
This led to the latin language being replaced with others such as Greek etc in this scenario.
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which answer choice is a “product”?
Answer:
D.A substance that is produced during a chemical reaction
In a certain population of rabbits, the allele for brown fur
is dominant over the allele for white fur. If 10 out of 100
rabbits have white fur, what is the allele frequency for
the recessive allele?
The Hardy-Weinberg equation is:
[homozygous dominant]2 + 2[heterozygous] +
[homozygous recessive]- = 1
• A. 0.32
• B. 0.10
• C. 0.95
• D. 0.90
SUBMIT
The allele frequency for the recessive allele is B. 0.10. Thus, option "B" is correct.
How, explain your answer?The Hardy-Weinburg equation is p + q = 1, or p^2 + 2pq + q^2 = 1, where p is dominant and q is recessive.
If 10 out of 100 rabbits have white fur, 10% of the rabbits have white fur. Therefore, 90% of the rabbits have brown fur, which can be substituted into the first equation to becoming 0.9 + 0.1 = 1. Now that we know what p and q equal, we can solve the rest of the equation.
0.9^2 = 0.81
0.9 * 0.1 * 2 = 0.18
0.1^2 = 0.01
Therefore, the allele frequency of the recessive allele is 0.1.
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An experiment that has only one variable changed
which of the following is an early sign or symptom of Gonorrhoea?
A.) Brain damage
B.) hard red ulcers around genitals
C.) burning sensation when urinating
D.) blisters around genitals
PLEASE CHOOSE THE CORRECT ANSWER, TY.
1. Those who were successful in Round One did not survive equally well when others were
competing for food at the same dish during round two. Which beak was not successful and why?
Large beak will not be successful if the food is small in size because they can't eat that food.
Which beak was not successful and why?
Large beak was not successful if there is small sized food is present on the dish while on the other hand, if the dish has big sized food then the small beak can't survive the second round because they are unable to eat that food.
So we can conclude that big beak will not be successful if the food is small in size because they can't eat that food.
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Davy made a model of the water cycle by adding some water inside a plastic bag, sealing the bag, and placing it in a sunny area. he noticed that the level of the water went down, and then some droplets appeared on the sides of the bag. which part of the water cycle caused water droplets to form on the side of the plastic bag? condensation evaporation precipitation runoff
Davy made a model of the water cycle by adding some water inside a plastic bag, sealing the bag, and placing it in a sunny area. He noticed that the level of the water went down, and then some droplets appeared on the sides of the bag. which part of the water cycle caused water droplets to form on the side of the plastic bag?
(a) condensation (b) evaporation (c) precipitation runoff
The part of the water cycle that caused water droplets to form on the side of the plastic bag would be condensation.
What is condensation?It is a process whereby water vapor in the atmosphere condenses or turns back into liquid.
Condensation is as opposed to evaporation. The latter is a process whereby liquid water turns into vapor water. In other words, evaporation and condensation are words and opposites.
Both processes play a major role in the water cycle of the ecosystem.
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How does sea level change when Earth's global temperature is lower?
A. Glaciers grow bigger, causing sea level to fall.
B. Glaciers grow smaller, causing sea level to fall.
C. Glaciers grow smaller, causing sea level to rise.
D. Glaciers grow bigger, causing sea level to rise.
Glaciers grow smaller, causing sea level to rise when Earth's global temperature is lower. Thus, the correct option is C.
Sea level lowers during cold climate periods, known as glacial epochs or ice ages, due to a shift in the global hydrologic cycle, in which water evaporates from the oceans and is stored on the continents as massive ice sheets, extended ice caps, ice fields, and mountain glaciers. At the last glacial maximum, some 20,000 years ago, global sea level was about 125 meters lower than it is today.
What is interglacial epochs?Because the melting North American, Eurasian, South American, Greenland, and Antarctic ice sheets returned their stored water to the world's oceans as the climate warmed, sea level rose. Sea level is at its highest during the warmest eras, known as interglacial epochs.
We are currently living in the most recent interglacial, which began around 10,000 years ago and is referred to by geologists as the Holocene Epoch. Sea levels were about 3 to 20 meters higher than they are now during several previous interglacials.
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Name the cavity between the nose and mouth.
A. pharynx
B. larynx
C. trachea
D. Esophagus
The cavity which separate or in between the nose and the mouth is the nasal cavity.
The nose and the mouth meet at a junction called the pharnx; option A
What is nasal cavity?The nasal cavity refers to a large, air-filled space above and behind the nose in the middle of the face. It is the cavity which divides the nose and mouth.
However, the nasal septum divides the cavity into two cavities .
The larynx is the passageway for air between the pharynx above and the trachea below.The pharynx carries air, food and fluid down from the nose and mouth.So therefore, the cavity which separate or in between the nose and the mouth is the nasal cavity.
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Drinking alcohol during pregnancy negatively impacts development of the fetus because
In addition to cytoplasm, most human body cells also have.
Answer:
Nucleus
Explanation:
There are many answers but some are :
Nucleus , Cell membrane , mitochondria , ribosomes
Hope this helped and have a good day
All cells contain cytoplasm, which is made up of cytosol, a jelly-like substance. The cytosol holds the internal structures in suspension.
What is the function of cell organelle in different cells?In addition to the nucleus, eukaryotic cells also have other organelles. An organelle is a cytoplasmic structure that serves a specialized purpose for the cell.
For instance, organelles called vacuoles store materials in the cell, whereas organelles called mitochondria supply energy.
The space between the plasma membrane and the nuclear envelope is known as the cytoplasm in eukaryotic cells, which have a nucleus.
The term “cytoplasm” refers to the entire inside the plasma membrane in prokaryotes, which are without a nucleus.
Therefore, Some cells additionally have a nucleus, cell membrane, mitochondria, and ribosomes in addition to their cytoplasm.
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which mammal didnt become extinct during the Cenoozoic era
Answer:
rodents and small horses
What is the main role of t cells in the immune response?.
T cells are a part of the immune system that focuses on specific foreign particles. Rather than generically attack any antigens, T cells circulate until they encounter their specific antigen. As such, T cells play a critical part in immunity to foreign substances.
what is end of a year journal at school
Answer:
Chodzi ci o oceny w dzienniku?
Explanation:
Answer:
An End of Year Journal a journal entry in the accounting system to record the differences between the business’s financial reporting system and the accountants’ end of year accounts that are used to prepare the Financial Statements and Tax Returns. The thing is, they need to match so that the reports are accurate.
Explanation:
Why are plants called producers
Answer:
they make there own good which creates energy for them to survive, grow and reproduce
Hemlock trees support life of other organisms. Climate change has increased the rate of infection of Hemlocks with woolly adelgid. These kill the trees which decrease the habitat of animals and other insects. This is an example of how climate change impacts the
Answer:
Don't know your answer choices, though if one of them is "Community Level" that is the correct one.
Explanation:
Found on other websites, and just completed a quiz with the same answer.