Crossing-over
A. increases genetic diversity
B. ends meiosis
Answer:
A. increases genetic diversity
Explanation:
Gene duplication, mutation, or other processes can produce new genes and alleles and increase genetic variation.
What part of the digestive system turns food from a solid into a liquid
Which of the following organisms would be found nearest to the top level of a food pyramid?
A.Cougar
B. Antelope
C.Plankton
D.Redwood tree
14 Pierre is studying the organs in the human digestive system. He looks at a
diagram of the
intestines, similar to the one that follows.
Which of the following correctly describes the diagram?
A Structure A is the small intestine, and structure B connects the mouth to the
stomach.
B Structure A is the small intestine, and structure B absorbs water from
digested material.
aliq
C Structure A is the large intestine, and structure B absorbs nutrients from
digested material.
D Structure A is the large intestine, and structure B produces bile and stores its
temporarily.
05
What is a reason for peer reriew?
A: to maintain scientific standards
B:to allow anyone to submit research
C:to ensure that science remains elitist
Poll results show that 90% of scientists believe global warming is happening, so it is best to say that
A) a majority of scientists do not support the theory of global warming
B) global warming is alarmist propaganda
C) global warming is happening
D) a minority of scientists doubt global warming is occurring
E) global warming is a creation of scientists
Answer:
I think it's C
Explanation:
I hope this helps ^^
7. Since the allele for color blindness is located on the X chromosome, color
blindness
1 cannot be inherited
2 occurs only in adults
3 is sex-linked
4 none of the above
(HELP ME PLEASEEE!)
Hemophilia A and red-green color blindness are examples of X-linked recessive diseases. Color blindness to red and green. Red-green color blindness prevents a person from recognizing red and green hues (usually blue-green). Otherwise, though, they can see normally. Thus, option C is correct.
What allele for color blindness located on X chromosome?Females have two X chromosomes, while males have one X and one Y chromosome. The X chromosome is where the genes that might cause red-green color blindness are handed down. Men are more likely than women to have red-green color blindness, since it is X-chromosom-inherited.
One of the most prevalent genetic (inherited) disorders in the world is color blindness, which means it is typically inherited from your parents.
Therefore, the allele for color blindness is located on the X chromosome, color blindness is sex-linked.
Learn more about color blindness here:
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Are RNAs processed before translation is able to occur in Prokaryotes? Do only mRNAs undergo processing and maturation in Eukaryotes?
Answer: RNAs are not processed before translation in prokaryotes, this process only takes place in eukaryotes.
Explanation:
Messenger RNA or mRNA is a single-straded ribonucleic acid that transfers the genetic information from the DNA (deoxyribonucleic acid) molecule of the cell nucleus to a ribosome (which are the machinery responsible for protein synthesis) in the cytoplasm. mRNA determines the order in which the amino acids of a protein will be joined and acts as a template or pattern for the synthesis of that protein. To accomplish this, the DNA molecule must be transcribed into an RNA molecule, which is used for protein synthesis.
The messenger RNA obtained after transcription is known as primary transcribed RNA or precursor RNA or pre-mRNA, which in most cases is not released from the transcription complex in a fully active form, but in eukaryotes it must undergo modifications before it can perform its function (RNA processing or maturation). These modifications include:
Elimination of fragments (splicing): In most cases, the mRNA undergoes the removal of internal, non-coding sequences called introns, and the connection of exons. This does not occur in prokaryotic cells, as they do not have introns in their DNA.Protection by CAP: Addition to the 5' end of the structure called "cap" or "capping", which is a modified guanine nucleotide, 7-methylguanosine triphosphate, via a 5'-5' triphosphate linkage, instead of the usual 3',5'-phosphodiester linkage. This cap is necessary for the normal RNA translation process and to maintain its stability. Polyadenylation signal: Addition to the 3' end of a poly-A tail, a long polyadenylate sequence, whose bases are all adenine. Its addition is mediated by a sequence or polyadenylation signal (AAAAAA), located 11-30 nucleotides upstream of the original 3' end. This tail protects the mRNA from degradation, and increases its half-life in the cytosol, so that more protein can be synthesized.The mature mRNA (in eukaryotes) is transferred to the cytosol of the cell through pores in the nuclear envelope. Once in the cytoplasm, ribosomes are coupled to the mRNA. However, in prokaryotes, ribosome binding occurs while the mRNA strand is being synthesized. After a certain amount of time, the mRNA is degraded into its component nucleotides by ribonucleases. So, the transcription and translation processes are carried out in a similar way as in eukaryotic cells but they occur simultaneously. But, the fundamental difference is that, in prokaryotes, the messenger RNA does not undergo a maturation process and, therefore, no cap or tail is added and no introns are removed. Moreover, it does not have to leave the nucleus as in eukaryotes, because in prokaryotic cells there is no defined nucleus.
So, RNAs are not processed before translation in prokaryotes, this process only takes place in eukaryotes.
Use the table to write the phenotypes that would be visible given the different genotypes.
I will mark Brainlist.
Answer:
EE. Large Eyes
oo. Round face shape
Ss. straight hair
CC.normal chin
Cc. normal chin shape
ee. Small eyes
ss. Curly hair
Oo. Oval face shape.
Like in this picture, Does tropical zone have a high temperature?
This diagram illustrates a type of reproductive process in an organism.
Answer:
Where is the diagram? Take a phone of the diagram
Can someone PLEASE help I will mark brainlist!
Answer:
C. Mutations are all permanent. Mutations can occur in many types of cells, and contribute to genetic diversity. Not all mutations are caused by harmful chemicals, as there are many natural mutations in nature. However, mutations are not always passed on from parents to offspring.
which 5 kingdoms that do have cell walls?
Answer: There are six kingdoms: Archaebacteria, Eubacteria, Protista, Fungi, Plantae and Animalia. Organisms are placed in a specific kingdom based upon a variety of factors, including cell wall structure. As the outermost layer of some cells, the cell wall helps maintain cellular shape and chemical equilibrium.
3) What are the “happy” neurotransmitters our gut biome can make:
a) Serotonin and dopamine
b) Cortisol and epinephrine
c) Serotonin and cortisol
d) Epinephrine and dopamine
Read the following passage from the Biology Department at University of California, Berkeley.
Northern elephant seals have reduced genetic variation because hunting by humans reduced their population size to as few as 20 individuals at the end of the 19th century. Their population has since rebounded to over 30,000, but their genes still carry the marks of this near extinction: they have much less genetic variation than a population of southern elephant seals that was not hunted as intensely.
Which of the following best describes how the population has evolved?
The population has not evolved because there was no change in allele frequencies.
The population has not evolved because it has grown.
The population has evolved because it has grown.
The population has evolved because there was a change in allele frequencies.
Answer:
the last one sorry if i'm wrong
Explanation:
According to the passage from the Biology Department at University of California, Berkeley.Northern elephant seals have reduced genetic variation because hunting by humans reduced their population size to as few as 20 individuals at the end of the 19th century. Their population has since rebounded to over 30,000, but their genes still carry the marks of this near extinction: they have much less genetic variation than a population of southern elephant seals that was not hunted as intensely.
The best option that describes is" the population has not evolved because there was no change in allele frequencies.Thus, option B is correct.
What is population?The term population reffered to the total number of people living in a particular given area.The population of an organism can't survive if it exceeds it's carrying capacity.
The causes that affect population growth animals that if there are more plants than usual in area, populations of animals that eat that plant may increase.
If animal population increases the population that eat that animal might also increase.
The effects of animals population can be dangerous and when population exceed the carrying capacity of their environment, animal suffer of malnutrition and disease.
When predictors became scarce due to over population, the weekar species of animal start or die in other ways .
The accurate description of the growth of a natural animal population is limited by environmental factors.
Therefore,The best option that describes is" the population has not evolved because there was no change in allele frequencies.Thus, option B is correct.
Learn more about population here:
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PLEASE HELPP (it's due at 11:59, i would like it done now)
here are the links to the articles if the ones on the pdf doesn't work
https://www.reuters.com/investigates/special-report/usa-lead-testing/ https://www.epa.gov/environmentaljustice
https://www.tedmed.com/talks/show?id=627338
Ive put this question here twice, i really need help, plz dont answer if youre not gonna help
Before mitosis begins, which happens before the nucleus starts diving?
A. The cytoplasm separates.
B. The DNA replicates.
C. The sister chromatids separate.
D. The homologous chromosomes cross over.
Answer:
B. The DNA replicates.
Explanation:
Activity in the chromosomes must occur before the beginning of mitosis. The cells will enter the S1 phase in preparation to divide.
Answer:
B should be your answer
Explanation:
In this assignment, you will use simulations to analyze how climate, resources, and habitat size affect
carrying capacity. You will then look at another simulation to analyze the effects of certain factors that
affect biodiversity and populations. Finally, you will write and revise a conclusion on how human activity
affects biodiversity
Answer:
Directly affects.
Explanation:
Climate, resources, and habitat size directly affect carrying capacity of an ecosystem. Favourable climatic and environmental conditions increases the population of organisms to its maximum limit. More resources leads to increase in population of species in an ecosystem until carrying capacity. Habitat size also depends on carrying capacity which means higher carrying capacity can leads to bigger habitat size. Climatic change, Habitat destruction, introduced and invasive species and genetic pollution are factors that effect both biodiversity and population. Human activities causes pollution, destruction of habitat by cutting trees etc affects biodiversity.
3) Earthquake S-waves do not travel through the Earth's
A) crust
B) moho
C) mantle
D) core
Answer:
Earthquake s waves do not travel through the Earth's core
What condition(s) make space a harsh environment for humans?
A. Lack of oxygen
B. All of these
C. Cosmic radiation
D. Lack of pressure
Why are theories important to science, if they cant be proven? Can they be changed/ modified? ( Please answer simply)
Answer: A scientific theory cannot be proven correct because there is no way to look into the future and find out if the theory is ever revised. Theories tend to change greatly as new discoveries are made.
A mutation on the checkpoints of the cell cycle can cause....
A. Apoptosis
B. Uncontrolled division
C. S phase
D. deactivation
Answer:
I will GUESS B is your answer
Explanation:
Where are fossils mostly found
Answer: Usually underground or in a Sedimentary Rock.
Explanation:
In the last 100 years, which of the following have added excess carbon dioxide to the atmosphere?
1) power plants
2) machinery
3) cars
4) ALL OF THE ABOVE
pls answer asap, would be very appreciative:)
Answer:
d
Explanation:
A group of marine scientists introduced a species of fish into an artificial habitat and wanted to determine if it will grow well in the new environment. They recorded the population over several years and their data is plotted below. Analyze the data and formulate a conclusion. Does this species of fish do well in this habitat? Predict what will happen to the population over the next five years.
Answer:
It will be increased by a lot over the nect five years
Explanation:
Answer:
This species of fish don't do well in this habitat, we can see this because in 9 years the number of individuals went from 100 to 63, which is 37 individuals less. Over the next five years, the population will continue to decrease.
hii! i’ll give brainliest pls help
Answer:
Option 2 earthquakes
Explanation:
Hope it helps ^^
Which statement describes the density of the inner planets?
All the inner planets are dense.
The inner planets are less dense than the outer planets.
Earth is dense, while the other inner planets are not.
Mercury and Venus are dense, while Earth and Mars are not.
Answer: All inner planets are dense
Explanation: Mercurius, Venus, Earth and are more dense than Jupiter
and Saturnus
Am I right? Please someone help me
Answer:
A. 17,100
Explanation:
The half life of carbon-14 is around 5,700 years. When the shell contains 50% of its original carbon-14, 5,700 years have passed. 25% means another 5,700 years have passed, meaning 11,400 years in total have passed. 12.5% means another 5,700 years have passed, meaning 17,100 years have passed in total.
What happens when cells grow out of control?
pls help! Diploid: somatic cell :: Haploid: