What is the significance of crossing-over during meiosis?
A different combination of genes is provided to each gamete.
A different number of chromosomes are provided to each gamete.
C The number of chromosomes is reduced by half in each gamete.
D The number of genes is increased in each gamete.
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Related Questions
2. Which fruit provides an analogy as to the thickness of the
crust of the earth?
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Answer:
The orange is analogous to the Earth in having a relatively dense centre (mantle/core) and a much less dense skin (crust).
Answer:
A good anology is an oarnge because it has a thin/semi hard "crust" while the inside is much softer and bigger
The movement of air caused by unequal heating
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Answer:
Wind is the movement of air, caused by the uneven heating of the Earth by the sun and the Earth's own rotation. Winds range from light breezes to natural hazards such as hurricanes and tornadoes
I’m literally on a timer rn I need this quick
A population of trout lives in a small lake. Some of the trout have a mutation that makes them more colorful. Select reasons this population is NOT a Hardy-weinberg Equilibrium.
A ) None of the alleles provide an advantage.
B ) All trout do not produce the same number of offspring.
C ) Some alleles provide an advantage.
D ) Mating is random
Mutation has occurred.
E ) Mutation has occurred
F ) The population is not infinitely large.
G ) Mating is probably not random.
H ) The population is not infinitely large.
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Answer:
A)none of the alleles provide an advantage
Severe acute respiratory syndrome (SARS) is an illness caused by a coronavirus. Symptoms include a high fever, headaches, and body aches typically occur two to seven days after infection by the virus. SARS is more serious in elderly patients. This information suggests that the reproductive cycle of the SARS virus is-
Answers
Answer:
lytic, due to the quick onset of symptoms after infection
Explanation:
There are two different mechanisms by which viruses can replicate: the lysogenic cycle and the lytic cycle. The lytic cycle is a reproductive cycle where viruses hijacks the host cell's machinery in order to rapidly produce new viruses, which subsequently burst out of the host cell. On the other hand, the lysogenic cycle is a type of viral reproduction characterized by the integration of the viral nucleic acid into the host cell genome, staying hidden. In consequence, this cycle (lysogenic) is slower compared to the lytic cycle because it requires an additional step (i.e., genome integration).
Answer:
lytic, because of the quick onset of symptoms after infection.
Explanation:
I took the Test
Grassland ecosystems in Texas have evolved to depend on periodic fires to return nutrients to the soil and encourage plant reproduction. Humans have prevented fires in many of these grassland areas, resulting in plant and animal communities with little diversity. Wildlife biologists often recommend purposefully starting fires called prescribed burns, which are monitored and controlled, in grassland ecosystems every 3 to 4 years. These biologists observe greater diversity in plant and animal life in the years following a prescribed burn. What natural processes are the biologists attempting to imitate
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Answer:
Succession
Explanation:
The biologists were attempting to imitate succession.
Succession refers to a gradual change to the structure and species composition of a community over a period of time.
A newly colonized environment such as a bare rock forms a community is said to be in primary succession. Thereafter, the structure and composition of the community keep changing until a relatively stable community, otherwise known as climax community, is established.
Secondary succession happens when a disturbed community tries to regain its original dynamics in terms of species composition and structure. A climax community is often less diverse than a community that is still in active succession.
Hence, the biologists were attempting to imitate succession by burning/disturning a relatively stable, less diverse climax community of grassland in order to realize a more diverse community that will undergo secondary succession.
Answer:
Succession
Explanation:
Which of the following is evidence for continental drift?
A. There is one continent on Earth. .
B. Places with hot climates once had glaciers. C. There are no mountains in Africa.
D. North America has no volcancus.
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Explanation:
its b i think if its right your welcome if its not let me know
The evidence for continent drift theory is that places with hot climates once had glaciers. Therefore, option B is correct.
What is continental drift theory?According to the Theory of Continental Drift, the continents of the Earth move relative to one another and appear to be drifting over the ocean floor together.
Wegener constructed a ring around the south pole using the regions that had been ice-covered. The conclusion of the theory is, Over the past 300 million years, the continents have drifted to their present locations after having formerly been a single, bigger continent.
The fit of the continents, the distribution of prehistoric fossils, rocks, and mountain ranges, as well as the placements of prehistoric climatic zones, were all used as evidence for continental drift. Hence, option B is correct.
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What is the role of chlorophyll is photosynthesis?
A. Carries high-energy electrons from the thylakoids to the stoma.
B. Converts carbon dioxide into glucose.
C. Absorbs energy from sunlight.
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Answer:
Chlorophyll's job is to obsorb sunlight into the plant to be able to use the process of photosynthesis! Answer is C
what is the difference between DNA and RNA
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Answer:
DNA is double-stranded, RNA is single-stranded. DNA has the base Thymine, RNA replaces it with Uracil. DNA has deoxyribose sugar, RNA has ribose sugar.
Explanation:
After the X chromosome is inactivated, it will
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The protective layer of cells of the outer epidermis is called the
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Answer: Stratum Corneum
Epidermis. The epidermis is the thin outer layer of the skin. It consists of 3 types of cells: Squamous cells. The outermost layer is continuously shed is called the stratum corneum
Explanation:
stratum corneum
The epidermis has no blood supply and depends on diffusion from the dermal cells for its metabolic needs. The dead-cell layer of the stratum corneum provides the protection from water loss that allows vertebrates to dwell on land
Through which of the following processes is energy formed in the form of glucose?
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Answer:
photosynthesis.
Explanation:
during photosynthesis, plants use energy from the sun to convert carbon dioxide and water into glucose and oxygen.
How can you revise this paragraph to expand the variety of sentence patterns? Mice, gerbils, and rats are all rodents. Cats, foxes, and hawks
hunt rodents. Grain, nuts, and berries are rodents' favorite foods.
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Rats, mice, and gerbils all belong to the same family of rodents, yet each species differs in several important ways. Foxes employ their rapid reflexes to catch prey, whereas cats are noted for being covert hunters.
What sort of symbiotic relationship do rodents and humans share?Whether we like it or not, these rodents are called commensal, which means they have a symbiotic relationship with us humans and profit from us and our homes.
What genetic variations exist between rats and mice?Although both are rodents, they differ genetically in that mice have 20 pairs of chromosomes whereas rats have 21 pairs. The size of the faeces is often used to identify the animals. Compared to mice, rats often live slightly longer.
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GIVING BRAINLIEST!!!!
Which environment is an area of land permanently filled with water and plenty of trees?
A) Grassland
B) Mountain
C) Swamp
D) Tundra
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It’s a swamp because that’s literally what a swamp is...
Why did dark moths thrive in England during the Industrial Revolution?
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Hope that helps
Most genetic diseases are caused by recessive alleles. Why? (1 point)
A) Recessive alleles are never expressed, so they confer no disadvantage to survival.
B) Dominant alleles that cause disease are removed from the population over time, but recessive alleles can
persist indefinitely in the population.
C) Genetic diseases occur only in heterozygous gene pairings.
D) The statement is untrue. Genetic diseases are most commonly caused by dominant alleles
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Answer:
B is the answer beacuse yeah sorry if wrong
Watersheds can vary in size?
True
False
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Answer:
it is true. Watersheds can be as small as a footprint or large enough to encompass all the land
A molecular biologist is developing a computer model of the transcription of a gene into RNA. Which event should be included in the model before transcription occurs?
A. the removal of introns from the gene
B. RNA polymerase inserting itself into the gene
C. RNA polymerase binding to a region near the gene, called the promoter
D. the joining together of exons to form the gene
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Answer:
C. RNA polymerase binding to a region near the gene, called the promoter
HELP PLEASE ! Which statement best describes the result of meiosis?
A. It produces body cells.
B. It causes alleles to go bad.
C. It prevents genetic problems.
D. It produces gametes/ sex cells.
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Answer:
D. It produces gametes / sex cells.
Explanation:
Meiosis is a reductions division, so the source of the sex cells will produce the gametes, undergoing meiosis. The gametes will have half the number of chromosomes in a human body (23).
Write a hypothesis about the worms and lima bean plants. Be sure to answer the lab question, “How can the presence of one species benefit another in the same ecosystem?”
Hypothesis: If plants are grown in soil containing worms, then . . .
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Answer:
A decomposing creature can decompose the bad items from a plant such as maybe dead leaves this would benefit the plant and the worm so their relationship would be considered Mutualism
Explanation:
The worm is a decomposing creature so it decomposes things like dead bugs and dead leaves and other items.
The relationship between the worm and plant is a mutual relationship because they are both being benefitted.
Of course, you will need to reword this answer but you may use it!
ヽ(^◞ ^)ﾉExplanation: I got it correct.
Answer:
solute particles inside increase or decrease
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Answer:
in what solution?
Explanation:
-
6. Which of the following is a technique used by scientists to date fossils?
A fossilization scale
B. absolute dating
C. carbon imaging
D. plaster casting
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Answer:
B. absolute dating
Explanation:
Absolute dating is the process of determining an age on a specified chronology in archaeology and geology.
Absolute dating provides a numerical age or range in contrast with relative dating which places events in order without any measure of the age between events such as fossils by scientists.
Which of the following statements correctly describes the genetic material inside a virus?
A.Has DNA or RNA, never both
B.Never has DNA
C.Never has RNA
D.Has both DNA and RNA
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Answer:
A. has DNA or RNA ,never both
The messenger RNA codes for six different amino acids are shown in
the table.
In on type of mutated gene for hemoglobin, CTC in the DNA code was
replaced by CAC. What amino acid substitution has taken place in the
mutated hemoglobin?
Select one:
a. Valine has replaced glutamic acid.
b. Cysteine has replaced glutamic acid.
c. Serine has replaced leucine.
d. Arginine has replaced leucine.
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Answer:
A. Valine has replaced glutamic acid
Explanation:
hope this helps:)
Subject: Science
Which statement best describes how the phase of the Moon changes from a full moon to a new moon?
O A. Earth moves around the Sun until the Moon is between the sun and Earth,
O B. Earth moves around the Sun until Earth is between the Sun and the Moon
O C. The Moon moves around Earth until Earth is between the Sun and the Moon.
O D. The Moon moves around Earth until the Moon is between the Sun and Earth.
Answers
Just let me know if I’m not help me please
Answers
Answer:
Your choices are all correct!
Answer:
Your are right the correct anwsers are
B. have cell wallC. possess large, central vacuoleF. Contains chloroplastsExplanation:
hope this helps you :)
PLEASE HELP!!! 70 PTS!!!! I don't understand how to find the "subtopics"
Achieving Anastasia’s Dream
Part 1
Remember Anastasia? To refresh your memory, she is a high school science teacher who has the dream of traveling the world. Anastasia decides that if she teaches a science course online, she will be able to work from anywhere in the world if she has an internet connection.
To construct her course, Anastasia needs to put together a rough course calendar. Her course is going to be on biology or the study of living organisms. The course has eight sections, with each section covering three to six subtopics. Each subtopic takes a week to cover.
Here are the sections in the course. To help Anastasia out, do some research online and find at least three subtopics for each section. (You could look at websites such as k12.com or textbook publishers such as Houghton Mifflin Harcourt or Prentice Hall to see what topics are typically covered in these types of courses).
Biology Foundations
Cells
Energy and Transport
Reproduction and Cell Division
Classical Genetics
Molecular Genetics
Human Body Systems
Ecology
That is a lot to fit in! Anastasia needs her course to consist of 36 weeks’ worth of lessons. Create a 36-week chart to help Anastasia fill in her lessons so that she knows when each topic will be covered. Fill in the subtopics that you found and spread them out evenly so that all topics are covered in Anastasia’s 36-week period. Anastasia will use your chart as a course calendar. Don’t forget that one subtopic takes a week to cover. Some sections may take more weeks to cover than others, depending on the number of subtopics included, and that is just fine!
Answers
Topics: is a heading in an outlined argument or exposition.
1. Biology Foundations
All Biology.Foundation of Biology.Chemical Basis of Life.What is subtopic?A subtopic that is part of a broader or more general topic.
2. Cells - (Week 1-4)
Types of cellmetabolism of cellcell communicationcell cycle3.Energy and Transport- (week 4-8)
Introduction to metabolism Enzymes Passive and active transport Osmosis and tonicity Photosynthesis4. Cellular respiration (week 8-17)
Glycolysis pyruvate oxidationthe citric acid or Krebs cycle oxidative phosphorylation.Reproduction and Cell Division5. Classical Genetics (week 18- 24)
Introduction to heredity Non-Mendelian inheritance Seˣ linkage Pedigrees6. Molecular Genetics (week 25- 29)
DNA ForensicsFunctional GenomicsGene Therapy GenomicsReplicationtranscriptiontranslation7. Human Body Systems (week 30- 34)
Cardiovascular system. ...Digestive systemEndocrine systemExcretory systemImmune systemIntegumentary system8. Ecology (week 35 - 36)
Community structure Introduced species and biodiversity Invasive species Ecological succession Ecological succession.For more information regarding biology syllabus, visit:
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what is the set of reactions that cells use to break down larger molecules, release energy, and make ATP?
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Answer:
Cellular respiration.
I would really appreciate it if someone help me with this!!!
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Answer:
Bb= HE
bb-HOC
Ss=HE
SS=HOD
ss=HOC
Tt=HE
tt=HOC
TT=HOD
Explanation:
How many cells are in the interphase stage of their life cycle?
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Answer: 16 cells i believe
Explanation: guesses
how much nervy is needed to melt 90g at 0°C
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Answer:
I don't know I'm sorry I will tell you another answer asks me to