Answer:
Naked viruses do not have a phospholipid membrane.
Explanation:
Nonenveloped or naked viruses do not have a phospholipid membrane outside their capsid and remain naked to the external environment. The envelopes are consists of portions of the host cell membranes i.e. phospholipids and proteins as well as some viral glycoproteins are also present in the envelop. Enveloped virus is more sensitive to detergent and alcohol as compared to naked virus because the naked virus has resistance against environmental factors which is absent in the enveloped virus. Once the envelop removed or broken, the virus loses its functional receptors and is not able to cause infection to susceptible cells.
What would cause a person to have two copies of the bent thumb allele (tt)?
1. A person whose mother or father had two copies of the bent thumb allele will always have two copies of the allele.
2.A person with two copies of "t" inherited one from their mother and one from their father.
3. A person born with one "t" mutation is more likely to develop a second "t" mutation during their lifetime.
4. A person with two copies must have duplicated the "t" allele through mitosis early in development. (They inherited one, then doubled it)
Answer:
A person with two copies of "t" inherited one from their mother and one from their father
Explanation:
This is because both the father and the mother are carriers of "t" alleles which is a bent thumb. When the parent mate, the father donate one t and the mother too donate one t allele, therefore the person will inherit bent thumb from them.
What atoms are in photosynthesis input molecules
Answer:
Photosynthesis involves three elements: carbon, hydrogen, and oxygen
atch the statement to the following options.A. One of a pair of chromosomes with similar genetic information and from different sources like the sperm and egg.B. Several X-shaped structures may be visible under the microscope and indicate where crossing over has occurred.C. A lattice of protein holds two replicated chromosomes in precise register with one another.D. Four chromatids are held together by a zipper-like structure.E. A process in which pairs of homologous complex chromosomes line up side by
Answer:
A. Homologue.
B. Chiasma.
C. Synaptonemal.
D. Synaptonemal.
E. Synapsis.
Explanation:
Genetics can be defined as the scientific study of hereditary in living organisms such as humans, animals and plants.
Synaptonemal complex can be defined as a network of proteins that is responsible for holding homologous chromosomes (homologues) together.
Generally, a synaptonemal complex (protein lattice) is formed between homologous chromosomes during mitosis and meiosis. Also, synaptonemal complex is important for the formation of the four sister chromatids referred to as tetrads.
Furthermore, the synaptonemal complex (protein lattice) has a tripartite structure which comprises of the following components;
I. SC protein-1 (SYCP1).
II. SC protein-2 (SYCP2).
III. SC protein-3 (SYCP3).
In conclusion, the synaptonemal complex plays a significant role in synapsis, recombination and chromosome pairing.
Matching the various terminologies in genetics with their description, we have;
A. Homologue: one of a pair of chromosomes with similar genetic information and from different sources like the sperm and egg.
B. Chiasma: several X-shaped structures may be visible under the microscope and indicate where crossing over has occurred.
C. Synaptonemal: a lattice of protein holds two replicated chromosomes in precise register with one another.
D. Synaptonemal: four chromatids are held together by a zipper-like structure.
E. Synapsis: a process in which pairs of homologous complex chromosomes line up side by side.
Ella and Olivia are sisters. Both sisters are taller than average, but each sister has specific traits the other sister does not. Ella is a competitive swimmer who trains outside in the summer. Her hair is bleached blond by the sun and chlorine in the pool water. Her many hours of practice have made her fit and muscular. Olivia loves to help people and wants to become a nurse someday. She volunteers every week at the nursing home where her great-grandmother lives. She walks the residents to and from their daily activities, and in the evening during dinner, plays the piano beautifully for them. Which of the following traits is inherited? a Piano Skills b Strong muscles c height d sun-bleached hair
Answer:
a
Explanation:
On your Spring Break in Mexico, you take a break to count the starfish in a tidal pool. You notice that there is a rare recessive trait that causes the starfish to have 6 legs instead of 5. Of the 27 starfish you can find, only 1 has 6 legs. What are the allele frequencies for this population
Answer:
0.04 for 6 legs starfish and 0.96 for 5 legs starfish.
Explanation:
The allele frequency for the 6 legs starfish is 0.04 whereas, the allele frequency for the 5 legs starfish is 0.96 because there is only one 6 legs starfish in the given population as compared to 5 legs starfish. The low population of 6 legs starfish is due to the presence of recessive allele while on the other hand, higher population of 5 legs starfish is due to the presence of dominant allele. The allele frequencies for both population is done by dividing the allele of interest by total number of alleles present in the population.
Use the scenario to answer the following question.
A forest ecosystem is home to mountain lions, coyotes, bobcats and deer.The deer eat grass. The mountain lions, coyotes, and bobcats eat deer. Hunters began killing large numbers of mountain lions, coyotes, and bobcats. About twenty years later, the deer population had largely increased. The teacher asked the students to explain why the population of deer had a large increase in population size.
Which student’s argument MOST accurately explains the increase in the deer population?
A. Student 2: The number of deer increased because without mountain lions, coyotes, and bobcats, the deer lived longer and had more offspring that also lived longer.
B. Student 3: The number of deer increased because with fewer mountain lions, coyotes, and bobcats, the deer had more food available to eat.
C. Student 1: The number of deer increased because deer populations are always increasing, even when there are mountain lions, coyotes, and bobcats preying on them.
D. Student 4: The deer population increased because with fewer mountain lions, coyotes, and bobcats, there was less competition within the deer population.
Answer:
A
Explanation:
The mountain lions, coyotes, and bobcats control the deer population hence in their absence the deer life span increased.
What did the experiments of Griffith and Avery show about genetic information ?
Answer:
Griffith and Avery studied bacteria and mice. Their S and R experiment revealed that DNA stores and transmits genetic information from one generation of bacteria to another. Chromosomes consist of protein and DNA, but mainly DNA.
Explanation:
The experiments performed by Griffith and Avery showed that the genetic material which is being passed on from parents to offspring is DNA.
What was Griffith and Avery experiment?The experiment performed by Griffith and Avery is known as "Transforming principle". This experiment was performed to prove the genetic material of the cell.
The experiments performed by Griffith and Avery proved that the DNA (Deoxyribonucleic acid) of the heat-killed S strain bacteria was responsible for the development of pneumonia in mice that were infected with the heat-killed S and live R-strain bacteria. They concluded that the DNA of the bacteria of the S-strain bacteria was passed on the next generation to the offspring, which was able to infect lungs.
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An agricultural extension (______) helps farmers and producers stay informed about current practices and technologies
Answer:
agent
Explanation:
e d g e n u i t y
A hypothesis is a proposed explanation for an observation, which can then be tested with experimentation or other types of studies.
a. True
b. False
Answer: True
Explanation: Hope this helps! Correct me if it is wrong!
You are testing learning and memory in two strains (A and B) of hamsters by determining which hamsters learn and remember how to navigate a maze better. You discover that a strain of hamsters raised in a diverse environment has enhanced memory compared to a strain of hamsters raised in a bare cage. You look at a specific gene that is involved in brain development and is activated during learning and memory. If you use bisulfite treatment and subsequent sequencing to study the methylation pattern is of the promoter for this gene, you find that at the same region of the promoter sequence:
Strain A has the following bisulfite treated sequence: GTACGTTAAACGATCG
Strain A has the following untreated sequence: GTACGTTAAACGATCG
Strain B has the following bisulfite treated sequence: GTATGTTAAATGATTG
Strain B has the following untreated sequence: GTACGTTAAACGATCG
Based on the sequences above, greater levels of transcription for this learning and memory gene more likely occur in which of the strains?
Answer:
The correct answer is - Strain B.
Explanation:
The methylation process is adding the methyl group to the DNA molecule that can alter the activity of the DNA segment without any change in the sequence. Methylation presence in the promotor in a gene can repress the transcription process.
By the sequence given it is clear that strain B is not treated and less likely to methylated whereas strain B is more likely to methylated so the greater transcribe sequence would be - Strain B.
What are the inputs of photosynthesis? Can someone explain what this question means
Select the correct answer.
Jack owns a cat. He takes the cat to the veterinarian for a routine examination. The veterinarian Informs him that the cat has carpal
hyperextension. What can you say about the cat's condition?
O A. The cat is overweight and has disorders on all feet.
B. The cat has a degenerative disease of the hind legs.
Ос. The cat has a degenerative disease of the front legs.
OD. The cat has been injured when it landed on its wrist.
Answer:
OD. The cat has been injured when it landed on its wrist.
Explanation:
Cat's condition is The cat has been injured when it landed on its wrist.
It happens due to the result of a single traumatic injury that ruptures the palmer ligaments in the front foot.It may also develop from related injury caused by jumping from an elevated surface.What is carpel hyperextension ?It is the abnormality of the carpels that cause hyperextension of the joints.It can cause trauma may be associated with pain and swelling.To know more about carpal hyperextension here
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each cell in the human body contains thousands of different enzymes responsible for regulating reactions within the cell. which statement explains why a single enzyme is unable to regulate a variety of reactions?
a. the binding of a product and an enzyme is specific.
b. the binding of a substrate and an enzyme is specific.
c. the enzyme is consumed by the products of the reactions. d. the enzyme is consumed by the substrates of the reactions
Answer:
A
Explanation:
Edge 2021
A single enzyme cannot regulate a variety of reactions because of the binding specificity of the substrate and enzyme. option C is correct.
Key-lock Theory:
It states that the enzyme and substrate are as lock and key. As there is only one specific key of a lock. Same there is only a single substrate (Key) for the Enzyme (Lock).
This specificity is because of the specific structure of the enzyme that allow only a specific substrate to bind.
Therefore, a single enzyme cannot regulate a variety of reactions because of the binding specificity of the substrate and enzyme.
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What is the difference between chemical and physical properties? Physical properties can be observed using your senses but not chemical properties.
O Chemical properties are harder to change than physical properties.
Chemical properties need chemicals for any type of changes.
Answer:
Chemical properties are harder to change than physical properties.
Answer:
Chemical properties are harder to change than physical properties.
Explanation:
What is the difference between chemical and physical properties? Physical properties can be observed using your senses but not chemical properties.
O Chemical properties are harder to change than physical properties.
Chemical properties need chemicals for any type of changes.
7. True or False: The majority of scientists agree that climate change is real 3 points
and caused by humans.
True
False
Answer:
True
Explanation:
If ya want a explanation you can go to this Link Nasa made an article about it And no i am not a bot
https://climate.nasa.gov/faq/17/do-scientists-agree-on-climate-change/
Another Link from Quora:https://www.quora.com/Is-it-true-that-99-of-scientists-agree-that-the-climate-is-changing-because-of-human-actions
Why is evolution considered a theory
A. It is backed up by scientific evidence
B. It cannot be proven
C. It is a guess about what happened
D. It was proposed by a scientist
Answer:
It's because it can only be proven by scientific evidence
Genetic engineering techniques can be used when analyzing and manipulating DNA and RNA. Scientists used gel electrophoresis to study transcription of gene L and discovered that mRNA strands of three different lengths are consistently produced. What explanations best accounts for this experimental result?
Answer:
the precursor messenger RNA (pre-mRNA) of the L gene underwent alternative splicing, thereby producing three different mRNAs that have different lengths
Explanation:
In eukaryotic organisms, transcription produces a precursor mRNA (pre-mRNA), which is a non-processed RNA sequence that contains both non-coding regions (i.e., introns) and coding regions (i.e., exons). Subsequently, this pre-mRNA is converted into a mature messenger RNA (mRNA) by a process known as 'alternative splicing', where introns are removed and exons and exons spliced together to form a contiguous coding sequence. During alternative splicing, differential combinations of exons can be produced from the same gene, producing different mRNAs with different lengths.
The experimental results with the gel electrophoresis of the transcription of mRNA are due to the alternative splicing.
What is alternative splicing?The genes are the codes that are enabled the formation of the DNA and RNA by expression. The transcription is the process of formation of mRNA from DNA template.
The mature mRNA is formed by the alternative splicing of the introns and the joining of exons for the functionalization. The process of alternative splicing results in the formation of the mRNA of multiple length.
The gel electrophoresis bands resulted have multiple length of mRNA. The results are the explanation for role of gene L in alternative splicing of mRNA.
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Explain Darwin’s theory of evolution
Answer:
Charles Darwin's theory of evolution states that evolution happens by natural selection. Individuals in a species show variation in physical characteristics. As a consequence those individuals most suited to their environment survive and, given enough time, the species will gradually evolve.
Explanation:
hope it helps u
The
absorbs most of the nutrients obtained from our diet.
Absorption of nutrients mostly occurs in the small intestine.
с
Which part of the nephron conserves water and minimizes the volume of urine?
O a A
О b.B
О с. С
In which biome is biodiversity most threatened?
OA) wetland
B) taiga
OC) grassland
D) tropical rain forest
HELP ASAP
Describe the similarities and differences between plant and animal cells
While having dinner, your little sister says she learned about energy and matter at school today and that the food you are eating and the energy you receive from it have been consumed and used previously. Your family is surprised by this and since you are the older sibling, they have asked you to explain whether your little sister is correct or not.
5-8 Complete sentences
Answer:
She is correct
Explanation:
The reason why she is correct because everything had come from something. For example, if a farmer is eating an apple, takes the seeds out, and plants them, the apple you are eating right now came from the farmer's apple. This means that it had been used previously. An example of it being consumed previously is if an animal had eaten an apple, put its feces on the ground, and left, the seeds from the apple will eventually grow. This could have been how your apple has grown. This could be an example of most foods we eat.
How did the result of the Hershey chase experiment strengthen Averys conclusions?
Describe three major ways humans use land
Answer:
they built farms buildings and broke the tree for roads
Explanation:
Why is the process of translation important? Select all that apply.
A. RNA carries DNA’s code out of the nucleus
B. RNA has different nitrogen bases than DNA
C. DNA cannot leave the nucleus
D. DNA is double stranded and RNA is single stranded
E. DNA winds itself up into chromosomes inside the nucleus
How many types of rocks can form from the rock cycle?
1
2
3
4
Answer:
The answer is 3. Its C on edge.
Explanation:
I took the test, trust me.
Which organelle is most similar to the nervous system based on its function
Answer:
The nucleus
Explanation:
It is the control center of the cell. It contains DNA, which tells the cell what proteins are to be made.
Question 1
2 pts
Which process changes water vapor (gas) into liquid water.
O Evaporation
O Condensation
O Transpiration
O Precipitation
Next >
Welco
Answer:
condensation
Explanation:
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