Answer:
A rising parcel of air expands because the air pressure falls with elevation.This expansion causes the air to cool. (I took help from book)
If two O blood group parents get married what is the probabilty of getting a baby with A blood group?
A. 100%
B. 0%
C.50%
D. 25%
Answer:
B. 0%
Explanation:
It is nearly impossible for two O blood parents to have a baby with an A blood type. This is due to no A or B blood to combine with in the gene pool.
Premed students are often traumatized by studying for their MCAT exam, which historically was always taken at the end of their Junior year in college. Now, many medical schools desire a meaningful gap year between completion of an undergrad degree and entrance to medical school so that incoming students have some sort of life-time experience either working, doing research, charity outreach, or traveling during that time. As a result, modern pre-med students often wait to study for their MCAT until after they graduate without realizing that it means they will end up taking two gap years, not one. Students who complete a basics genetic course should be confident with their knowledge about DNA, RNA, and proteins, along with how to solve basic inheritance problems, which will help them on their MCAT exams. Introductory Genetics helps to reinforce concepts taught fleetingly in Introductory Biology.
1. Jiro is told that a bacterium contains a single DNA chromosome containing 15% guanine and then is asked to decide if the organism is âGCâ rich or not (>50% G-C content = 'rich')). With full confidence, Jiro responds:
A.Heck no! The strand has a GC content of 30%.
B.Heck yeah! The strand has a GC content of 70%.
C.Heck no! The strand has a GC content of 15%.
D.It contains exactly 50% GC content.
2. If Marisol isolates 15% guanine from a strand of DNA, she can say with full confidence that:
A.the strand is made up of 70% pyrimidines.
B.the strand is made up of 30% pyrimidines.
C. the strand is made up of 50% pyrimidines and 50% purines.
D.the strand is made up of 70% purines.
3. Jayson is asked if a strand of DNA that is GC-rich will be harder to separate than one that is GC-poor. He responds with full confidence:
A. No!
B.Yes!
C. This question is irrelevant since double-stranded DNA is always easy to separate due to the hydrogen bonds that hold them together.
D.After 150 years of research into DNA, no one knows the true answer to this question.
Answer:
1. A
2. C
3. B
Explanation:
1. The DNA here has a Guanine(G) content of 15% and as G is equal to C,
[tex]$GC=G+C$[/tex]
= 15% + 15%
= 30%
As the GC content is less than 50 % , so the DNA is not a GC rich DNA. Therefore, for a DNA to be GC rich in content, G+C should be more than 50%.
Therefore the correct option is (A), The strand has a GC content of 30%.
2. With a content of 15% Guanine, we calculate the proportions of the four bases. They are :
[tex]$A+T=G+C$[/tex] and [tex]$A=T, G=C$[/tex]
∴ [tex]$A+T=15\% +15\%$[/tex]
[tex]$=30\%$[/tex]
So when we substract 30% from 100% , we get 70%. Now this 70% is then distributed in the equal proportions for [tex]$A$[/tex] and [tex]$T$[/tex].
Therefore, we have:
[tex]$A=30\%, T=35\%, G=15\%$[/tex] and [tex]$C=15\%$[/tex]
Therefore we calculate the content of purines [tex]$(A,G)$[/tex] and pyrimidines [tex]$(C,T)$[/tex].
Purine content : [tex]$A+G = 35\% + 15\%$[/tex]
[tex]$=50\%$[/tex]
Pyrimidine content : [tex]$C+T=15\%+35\%$[/tex]
[tex]$=50\%$[/tex]
Therefore, the correct option is (C).
3. Yes, the GC rich strand of the DNA is more stable the a GC low content DNA. But this stability is not due to the hydrogen bonds, it is mainly due to the stacking interaction known as base stacking.
So the correct option is (B).
What will result if a frog lays eggs that are never fertilized?
A.The eggs will not produce offspring.
B.The eggs will develop into tadpoles.
C.The frog will start giving live birth to offspring.
D.The frog will mate less often.
Answer:
A. The eggs will not produce offspring
Explanation:
All living things require fertilization in some form
In garden peas, tall (T) vine is dominant over short (t) vine, and round pea pod (R) is dominant over wrinkled pea pod (r). Cross an h0m0zygous tall, round pea plant with an h0m0zygous short, wrinkled pea plant. Show the genotypes and phenotypes of the F1 offspring and the probability of each.
__________ Genotype of the h0m0zygous tall, round pea plant
__________ Genotype of the h0m0zygous short, wrinkled pea plant.
Answer:
TtRr - 100%
Explanation:
This question involves two different genes in pea plants. One gene is coding for height and the other for pea shape. The allele for tallness (T) and round (R) pea is dominant over the allele for shortness (t) and wrinkled (r) peas.
According to this question, an h0m0zygous tall, round pea plant (TTRR) is crossed with an h0m0zygous short, wrinkled pea plant (ttrr). The following gametes will be produced by each parent:
TTRR - TR, TR, TR, TR
ttrr - tr, tr, tr, tr
Using these gametes in a punnet square (see attached image), the following proportion of offsprings is produced in the F1 generation: All or 100% TtRr
TtRr will be phenotypically tall and round.
Explain the three mechanism for how activated transcription factors can stimulate transcription through modification of the chromatin structure.
Daniel was a prophet of God both to God's captive people and to all of the following gentile kings except:
Nebuchadnezzar
Darius
Xerxes
Belshazzar
Daniel was a prophet of God both to God's captive people and to all of the following gentile kings such as Nebuchadnezzar, Darius, and Belshazzar except Xerxes. Thus, the correct option is C.
Who was Daniel?Daniel is the main character of the Book of Hebrew Bible. According to the Hebrew Bible, Daniel was a noble Jewish of the Jerusalem, who was taken into captivity by the Nebuchadnezzar II of Babylon, who later serves the king and his successors with loyalty and ability until the time of the Persian king Cyrus, all the while remaining true to the God of Israel.
The consensus of one of the most modern scholars is that Daniel is not a historical figure according to the Bible and that the book is a cryptic allusion to the reign of the 2nd century BCE Hellenistic king Antiochus IV Epiphanes.
Daniel was a prophet of God and all the gentile kings like Nebuchadnezzar, Darius, and Belshazzar except Xerxes.
Therefore, the correct option is C.
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Studying the embryology of animals provides important evidence to support claims of shared evolutionary history. What feature of embryology makes it capable of providing data for common evolutionary history not readily available from other sources?
A)As the embryo develops, it reveals the expression of genes.
B)The growth of the embryo is achieved by differentiation of cells.
C)A developing embryo exhibits structures not present in the adult animal.
D)The development of embryos of a certain species is consistent.
cccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc
Why is Thomas Jefferson well known
Answer:
Thomas Jefferson is known as a Founding Father of the United States. He is most famous for writing the Declaration of Independence. Thomas grew up in the English Colony of Virginia.
Explanation:
What are your top 3 favorite lifeforms and why? What adaptations help these living things to survive in their environment?
please help
I will give brainliest for the best answer
Answer:
so it's saying what are your favorite animals or plants or living things and how do they survive
hi!! here's ur answer!!
my top 3 favourite lifeforms are- polar bears,tigers and ducks. :D
1) polar bears- are well adapted for survival in the Arctic. Their adaptations include: a white appearance - as camouflage from prey on the snow and ice. thick layers of fat and fur - for insulation against the cold.
2) tigers- striped coat helps them blend in well with the sunlight filtering through the treetops to the jungle floor. The tiger's seamless camouflage to their surroundings is enhanced because the striping also helps break up their body shape, making them difficult to detect for unsuspecting prey.
3) ducks- possess an oily coating that keeps water from settling in their feathers, helping them in staying dry and keeping themselves warm. Their webbed feet, designed like paddles, provide more surface area to push against the water and help them swim.
hope it helps:)
are humans multicelluar organism or unicellular organism
Answer:
multicellular
Explanation:
Some dog foods contains corn and wheat that provide the dog with carbohydrates. Which claim explains why carbohydrates are important to cell processes? Group of answer choices They make amino acids. They form cell membranes. They help chemical processes happen. They are a source of energy.
Answer:
they are the sourse of the energy
Explanation:
Which process moves small rock pieces during sedimentary rock formation?
Answer: The process that moves small rock pieces during the sedimentary rock formation is erosion. The carrying away of small rock particles by the effect of wind, water, or ice. It is a surface phenomenon on the earth's crust and then transportation takes place.
Explanation: I hope this helps!
( I'm confident have a great day!)
Which statement best describes the hydrosphere?
A it includes only the water on the Earth's surface
B It includes only freshwater on the Earth's surface
C It includes water on the Earth's surface, underground, and in the atmosphere
D It includes fresh and salt water on the Earth's surface and underground
Answer: C
Explanation:
Can animals perform
photosynthesis?
No
Yes
Answer:
No
Explanation:
animals are heterotrophic meaning they can't produce their own food.
Describe the role of microtubules in mitosis. Why must
microtubules both assemble and disassemble for mitosis to occur properly?
Answer:
The correct answer is - helps in separating the chromosomes and pull them to opposite poles.
Explanation:
Microtubules have a key role in forming the spindle apparatus or mitotic spindle that help the chromosomes to split during metaphase and anaphase later.
The kinetochore microtubules pull the chromatids to the poles back and forth so they can align along the equator of the cell, This back and forth movement takes place by the assembling and disassembling of microtubules.
Answer:
helps in separating the chromosomes and pull them to opposite poles.
Explanation:
Is CO2 involved in a plant that is not carrying on photosynthesis?
Answer:
No, CO2 is only involved in a photosynthetic plant
Explanation:
Carbon dioxide (CO2) is an inorganic gaseous molecule found in the atmosphere. It is one of the reactants of photosynthesis carried out by most plants because it acts as the source of carbon to the photosynthetic plant.
However, in a plant that does not photosynthesize, CO2 is not involved in such plants as there would be no need for it.
the pores in leaves that are responsible for gas exchange and water release are called? chloroplants ,roots, guard cells, or stomata
if a mother has the following alleles for a gene - Bb - what would her gametes look like?
Answer:
half of the gametes would have B and the other half would have b
Explanation:
Many Learners Perform Well In Grade 12 But still not accepted into Universities.Explain Two Reasons For This
Answer:
1. Confusion
2. Financial issue
Explanation:
1. The reason I say this is that many of them are not really sure about what they want they want to do in their later future making them a little confused on what to do.
2. It is a common issue which has taken away so many bright minds away from their future in helping the world and their individual community to prosper in different ways.
The reason why many students from grade 12 are not accepted in universities is that they may not be ready to pursue a given career or their parents may not be able to afford it.
Why are grade 12 students not accepted in universities?In the whole of North America, grade 12 is the senior class or the highest class in high school.
Some grade 12 students may not be admitted into university even though they performed well because;
Some of the students who have finished well in grade 12 do not yet have clear cut career orientations.Also, some of them may not have parents that can afford to send them to the university.Hence, a good performance in grade 12 do not guarantee university admission.
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when a cell goes through mitosis and cell division, the two new cells have _?
Answer:
D
Explanation:
since in mitosis, the cell has 23 pair of chromosomes, after the cell division process called mitosis, it divides into 2 cells that have 23 pairs of chromosomes
1. which of the following organisms is not a strepsirrhines?
Which of the following courses would NOT be part of the curriculum for someone studying to be a botanist? Native Flora Native Fauna Exotic Dendrology Plant Systematics
Answer: The correct answer is Native Fauna
Explanation: This answer has been confirmed correct.
Native Fauna refers to animals.
Corn is a popular feed for pigs because it is high in carbohydrates. However, it has a very low level of the amino acid lysine, so farmers usually add high-lysine feeds to the corn. Which statement BEST explains why lysine levels in pig feed are important? what is the answer
Answer:
a diet high in carbs and low in lysine means the body cannot convert the energy into muscle tissue, and instead converts it to fat.
not enough lysene= fatty hogs, which are reduced in value at market
After plants first moved to land, what happened?
A.
Plants evolved into multicellular organisms.
B.
Adaptive radiation formed many new land plant species.
C.
Photosynthesis evolved as a way to produce energy.
D.
They adapted by developing cuticles.
Answer: B. Adaptive radiation formed many new land plant species
Explanation:
After plant first moved to land adaptive radiation formed many new land species
What is adaptive radiation?"Adaptive radiation is a process in which organisms diversify rapidly from an ancestral species into new species due to change in the environment."The species adapt themselves to varied habitat in order to survive and the number of species increases.What is species?"It is a group of living organisms consisting of similar individuals capable of exchanging genes or interbreeding."Hence, the correct option is B. Adaptive radiation formed many new land plant species.
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Hey guys I need help with this question if you would be nice to answer it,it would be a pleasure pls do not post any links to the answers because one guy already did this to me and one letter Im not that stpid to know someone doesnt post a full file for answers so please do not do this anyways get that out of the way here is my question:1. What characteristics of these areas make them most susceptible to landslides? Use evidence from the map to construct your argument.
Answer:
Usually mudslides are caused by torrential rain storms and elevations like mountains.
when it rains or storms for weeks on end the water that is produced builds, mixes with soil and eventually gravity takes over, creating a strong force.
On the map, there are mountains that surround the villages and populations.
What is the body's first line of defense against infection by foreign organisms? antibodies lymph nodes white blood cells the skin
Answer:
White blood cells
Answer:not white blood cells
Explanation:
Give the types of bacteria.
Explain the relationship between crossing over and genetic variation
Answer:
When homologous chromosomes form pairs during prophase I of meiosis I, crossing-over can occur. Crossing-over is the exchange of genetic material between homologous chromosomes. It results in new combinations of genes on each chromosome. It is obviously another source of genetic variation in offspring.
Hope this helps you. Do mark me as brainliest.
The result of mitosis is
Answer:
2 daughter cells
Explanation:
Answer:
A form of cell division, mitosis results in two daughter cells who are identical. They're genetically identical to the original cell from where they came. Those details are important!
Hope this helps ♥ Brainliest appreciated!! I'm trying to reach my goal :]
Which organisms transfer nitrogen into a form that is useful to plants?
Answer:
Nitrogen-fixing bacteria are a type of organisms that transform nitrogen to a form that is useful to plants. These microorganisms are capable of transforming atmospheric nitrogen into fixed nitrogen.
Explanation: