Answer:
Genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).
Definitions:
Predation rate
is the annual mortality within. a population directly attributable to predation; it represents the level of. successful predator attacks that the animals are unable to control after they. have implemented their antipredator strategies. Predation risk, on the.
random mutations:
What is commonly called "random mutation" does not in fact occur in a mathematically random pattern. The process of genetic mutation is extremely complex, with multiple pathways, involving more than one system. Current research suggests most spontaneous mutations occur as errors in the repair process for damaged DNA.
competition:
the activity or condition of competing.
environmental changes:
Examples of these global environmental changes include climate change, freshwater shortages, loss of biodiversity (with consequent changes to functioning of ecosystems), and exhaustion of fisheries.
Genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis.
Predation rate is the annual mortality within. A population directly attributable to predation; it represents the level of. successful predator attacks that the animals are unable to control after they. have implemented their antipredator strategies. Predation risk, on the.
"Random mutation" does not in fact occur in a mathematically random pattern. The process of genetic mutation is extremely complex, with multiple pathways, involving more than one system. Current research suggests most spontaneous mutations occur as errors in the repair process for damaged DNA.
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How the type convex and the shape long/short of the lens in the eye help in seeing object?
Answer:
convex lens converges the reflected ray and makes an inverted image on the retina . ciliary muscles helps the cover lens to adjust. thus, the photo receptors on the retina convert the image to electrical impulses and it is send to the brain by optic nerves
Explanation:
mark me brainliest please
Explain what a mutation on the DNA is?
Answer:A mutation is a change in a DNA sequence. Mutations can result from DNA copying mistakes made during cell division, exposure to ionizing radiation, exposure to chemicals called mutagens, or infection by viruses.
Explanation:
HELPPPPP
Calcium-41 has a half-life of 80,000 years. At the end of 240,000 years,
how much Calcium-41 would remain in a sample initially containing 60
micrograms? *
A 7.5 micrograms
B 60 micrograms
C 15 micrograms
D 30 micrograms
If the half-life is 80,000 years, then 240,000 years would be equivalent to three half-lives. In other words, the initial amount of the radioactive calcium-41 would have been reduced in half three times over. Mathematically, this can expressed as
calcium-41 remaining = initial mass of calcium-41 × (0.5)³.
Since we are given the initial mass of calcium-41, the amount of calcium-41 remaining after 240,000 years would be:
60 μg × (0.5)³ = 7.5 μg, or 7.5 micrograms.
Charles has developed a new advertisement that can be used online. He tests how well it draws people's attention by closely
monitoring the eye movement of 1,000 test subjects as the new ad appears on their computer screens!
Charles finds that 97% of the test subjects' eyes were drawn toward the ad when it appeared. By comparison, only 50% of the test
subjects' eyes were drawn toward a box of plain text when it appeared instead. He concludes that the new ads are better at
attracting people's attention than old ads.
What is wrong with Charles' experiment?
Answer:
He did not compare the new ads to old ads.
Explanation:
Need somebody to help!!!!
Answer:
I would say the first option
Explanation:
Answer:
D
Explanation:
It is being turned into RNa and will go out of the nucleas to be read.
What invention caused scientists to stop using the five kingdom classification system?
A ____________ force is a force that one object applies to another object without touching it.
Answer:
Gravity?
Explanation:
Or it could be a non contact force.
What is the correct order of the events below:
1. Organism breaks down sugar to release energy in its chemical bonds.
2. Energy from the sun reaches Earth
3. Radiant energy is converted into chemical energy
Answer:
2,3and 1
is correct order for this question
hope it helps
HELP ASAP
which of the following protists possesses colia
Answer:
option b
Explanation:
paramecium posseses cilia
6. The complex is formed when the DNA double helix coils around the proteins A. nucleosome; histone B. chromosome; ribosome C. histone; ribosome D. chromosome; nucleosome
Answer:
B
Explanation:
20.
Plant and animal cells are _____ bacterial cells.
identical to
simpler than
made of
larger than
Answer:
larger than
Explanation:
Bacterial cells are very small - about 10 times smaller than most plant and animal cells
Answer:
Larger than
Explanation:
A bacterial cell that makes a protein normally found in spider venom because it has a spider gene would be an example of which of the following? (Pick two answers)
Answer:
c & d
Explanation:
I just took the quiz and I got D correct. I'm not sure about C but the rest of the options don't make sense, so it's probably C.
A bacterial cell which is producing spider venom protein is an example of genetically modified organism and a transgenic organism. Thus, the correct options are C and D.
What are Transgenic organisms?
Transgenic organism refers to those organisms or cells whose genome has been modified or altered by the introduction of one or more foreign DNA sequences which are beneficial from another species through artificial means. Transgenic organisms are generated in the laboratory for research purposes.
A bacterial cell which is making a protein that is normally found in spider venom is an example of genetically modified or transgenic organism as in these organisms the genome of the organism is modified or altered as per the requirements.
Therefore, the correct options are C and D.
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To make ethanol for use in _______, yeast is provided with sugars that have come from crops such as maize.
Answer: To make ethanol for use in BIOETHANOL( a biofuel), yeast is provided with sugars that have come from crops such as maize.
Explanation:
Ethanol Fermentation is defined as the process whereby sugar( fructose, sucrose or glucose) are broken down by the action of microorganism such as yeast to give of ethanol(alcohol) and carbondioxide as by products.
In the use of ethanol as a biofuel, there are different sources where sugar products can be gotten from, but the main sources of sugar required to produce ethanol come from energy crops. These crops are grown specifically for energy use and include corn, maize and wheat crops.
BIOETHANOL is a renewable source of fuel that can be produced through the yeast fermentation of sugar gotten from crops such as maize. Although ethanol can be used in wine and beer production, sugar sources are usually gotten from grape fruits and barley.
An example of an organism is
the human heart
the petals of a rose
a colony of ants
an oak tree
It's obviously not A.
Answer:
an oak tree
Explanation:
All the other options are either parts of an organism ( rose petal and human heart) or, multiple organisms ( a colony of ants) but, an oak tree is one single living organism.
PLEASE HELP! 60 POINTS!
Question 1:
Which term is the name for the stages a species goes through including birth, reproduction, and death?
lifespan
life cycle
longevity
metamorphosis
Question 2:
______________ is a difference in the same trait.
Adaptation
Selection
Evolution
Variation
Question 3:
Organisms that are better able to survive are more likely to _______ and pass on their traits.
respond to stimuli
reproduce
grow
maintain homeostasis
Answer:
Question 1: life cycle
Question 2: adaptation.
Question 3: reproduce
Explanation:
I'm pretty sure that these are correct I hoped this helped!
Which body system is responsible for producing offspring
Answer:
The Reproductive System
Explanation:
In living things, the reproductive system is responsible for producing children. It is a group of hormones, tissues and organs that cooperate to promote the conception and development of new ones.
Men have a variety of reproductive organs, including the testes, epididymis, vas deferens, prostate, etc. Sperm production and distribution are facilitated by these structures. In women, the reproductive system includes the uterus, fallopian tubes, cervix, and vagina, among other structures.
These organs play an important role in the development of the egg during pregnancy, fertilization, implantation of the fertilized egg, and the growth and development of the fetus. Additionally, the reproductive system contains hormones that control reproduction, such as testosterone in males and estrogen and progesterone in females.
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help needed, thanks ig :')
In body cells,chromosomes are found in________.
How can evolutionary relationships be modeled and interpreted?
Answer:
Scientists must collect accurate information that allows them to make evolutionary connections among organisms. Similar to detective work, scientists must use evidence to uncover the facts. In the case of phylogeny, evolutionary investigations focus on two types of evidence: morphologic (form and function) and genetic.
Arrange the terms from smallest to largest:
Cell, Chromosome, DNA, Genes, Nucleus, Base Pairs
How do streams play a vital role in human life?
Answer:
uwuExplanation:
How many scientists contributed to the creation of the microscope. What were each of their contributions?
Answer:
11 Scientists
Explanation:
1. Hans and Zacharias Janssen (1590): They created the first compound microscope with more than one lens.
2. Robert Hooke (1667): He details the discoveries he made with the microscope in his book, 'Micrographia'.
3. Anton van Leeuwenhoek (1675): He discovered bacteria with the help of the microscope.
4. Joseph Jackson Lister (1830): He discovered that to get a clearer magnification, weak lenses ought to be used at different distances.
5. Ernst Abbe (1878): Formulated a mathematical theory that showed the relationship between resolution and the wavelength of light.
6. Richard Zsigmondy (1903): Discovered the ultra microscope that enabled the examination of specimen beyond light's wavelength.
7. Frit's Xernike (1932): invented the phase-contrast microscope.
8. Ernst Ruska (1938): He invented the electron microscope.
9. Gerd Binnig and Heinrich Rohrer(1981): Both discovered the scanning tunnel microscope.
Answer:
1. Hans and Zacharias Janssen (1590): They created the first compound microscope with more than one lens.
2. Robert Hooke (1667): He details the discoveries he made with the microscope in his book, 'Micrographia'.
3. Anton van Leeuwenhoek (1675): He discovered bacteria with the help of the microscope.
4. Joseph Jackson Lister (1830): He discovered that to get a clearer magnification, weak lenses ought to be used at different distances.
5. Ernst Abbe (1878): Formulated a mathematical theory that showed the relationship between resolution and the wavelength of light.
6. Richard Zsigmondy (1903): Discovered the ultra microscope that enabled the examination of specimen beyond light's wavelength.
7. Frit's Xernike (1932): invented the phase-contrast microscope.
8. Ernst Ruska (1938): He invented the electron microscope.
9. Gerd Binnig and Heinrich Rohrer(1981): Both discovered the scanning tunnel microscope.
Explanation:
Would you want to have your DNA sequenced and find out about your genetic health? What if the test only told you whether or not you might be likely to develop certain medical conditions? Explain the pros and cons of knowing this information.
If an organism's gametes contain 25 chromosomes, how many chromosomes will their somatic (body cells) contain?
Answer:
Somatic cells are diploid, meaning that they contain two sets of chromosomes, one inherited from each parent
Explanation:
At the end of mitosis, the two daughter cells will be exact copies of the original cell. Each daughter cell will have 30 chromosomes. At the end of meiosis II, each cell (i.e., gamete) would have half the original number of chromosomes, that is, 15 chromosomes. 2Which type of mutation often has the least effect on organisms' traits (and may have no effect at all)? Nondisjunction Substitution Insertion Deletion
Answer:
The correct answer is - substitution.
Explanation:
Substitution mutations are the point mutations that are the mutations that least likely affect the trait of an organism or have no effect at all. Substitution mutations take place when there is only one nucleotide base is substituted by another nucleotide base in the DNA or RNA of an organism's genome.
In this case, there is no effect found on the protein formed by these DNA sequences. These substitution mutations generally found in somatic cells and have little to no effect at all.
Compare the symmetry of animals with tissues and without tissues.
HELP PLEASE
Answer:
Only members of the phylum Porifera (sponges) have no body plan symmetry. There are some fish species, such as flounder, that lack symmetry as adults.
Porifera is animals without tissues. These animals are asymmetrical.
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How are nitrogen bases held together in a double helix?
A. carbon bond
B. hydrogen bond
C. covalent bond
Answer:
B. hydrogen bond
Explanation:
The double helix is held together by hydrogen bonds between the bases
What characteristic of living things helps them to adapt to a changingenvironment?
1. Where and how is energy created in the sun's interior? Starting from
the center, what are the interior layers that this energy travels through?
HELPPP ASAP!!!!!!
The energy within the Sun is generated by the process of nuclear fusion. The layers of the Sun from inward to outward are:
The coreThe radiative zoneThe convection zoneThe Solar's interior:The energy within the Sun is generated by a process called nuclear fusion. During the process, the high temperature and pressure inside the core of the Sun make nuclei separate from their electrons. The fusion of hydrogen nuclei takes place to produce the helium atom.
Radiant energy is discharged during the process of fusion. The energy of the Sun that is generated in the core, moves outwards. First, the energy travels through the radiative zone, in which particles of light, that is, photons carry the energy.
It takes millions of years for the energy to move to the next layer, that is, the convection zone. In this zone, the transferring of energy takes place more briskly. The bubbling effect is witnessed on the Sun's surface and is known as granulation.
Thus, the energy in the Sun's interior is generated by the process of nuclear fusion, and the energy moves from the core to the radiative zone, and eventually to the convection zone.
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Upwelling currents are caused by:
1.temperature differences between water masses
2.salinity differences between water masses
3.pressure differences between water masses
4.Ekman spiral
Answer:
its the ekman spiral not pressure differences between water masses
Explanation:
Upwelling. Along some coasts, the Ekman spiral causes an upwelling of deeper water to replace the water that has moved offshore. The colder, deeper water is richer in nutrients. These upwelling areas contain some of the richest fishing grounds in the world.