Answer:
A. much of the variation in individuals of a population is heritable
Explanation:
Charles Darwin is a scientist well known for his development of the concept of evolution. Darwin was able to deduce that the species of a population have a common ancestor and that as time passes there is a modification in the characteristics of these species that makes it easier for them to adapt to their environments. These traits that were inherited from past descendants, were helpful traits that made it possible for their own descendants to be able to survive better than their peers. He noted that there were limited resources for survival, therefore it was a case of the survival of the fittest.
Natural selection was the term used by him to describe how species of a population survived over time. Members of a population had varied traits that enabled them to survive. For example, the descendants of an ancestor could have slightly different shapes, colors, sizes, and other features but still maintain traceable heritable traits.
A scientist wants to find the percent of teens that like the taste of "brand X"lemonade over "brand Y" lemonade. She conducts a taste test of
500 teenagers. She gives each teen a bottle of lemonade with the labels showing the brand of each lemonade. She asks each teenager to taste
each brand after drinking water in between. She finds that 50% of teens like brand X and 50% like brand Y lemonade. Why are the results
of the survey most likely unreliable?
a
Adults were not interviewed.
b
Not enough teens were interviewed.
с
The investigation was based on taste,
d
The lemonade labels introduced bias.
Answer:
c
Explanation:
beacuse the investigation was beacesd on taste
Which is a function of the cell membrane? performs photosynthesis controls what enters and leaves the cell produces proteins provides energy to the cell
Answer: controls what enters and leaves the cell
Explanation: it is a barrier keeping the constituents of the cell in and unwanted substansces out and is also a gate allowing transport into the cell of essential nutirnts and movement from cell of waste products.
The cell membrane is also referred to as the plasma membrane or cytoplasmic membrane of the cell. It lays various functions in the cell.
The correct answer is:
Option B. controls what enters and leaves the cell
Role of the cell membrane are:
The cell membrane is a biological membrane, which separates the interior of the cell from the external environment. The cell membrane is selectively permeable such that it allows certain molecules to pass through them. The cell membrane controls the entry and exiting of molecules from the cell.
Thus, the correct answer is Option B.
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Why are G proteins known as guanine nucleotide-binding protein?
Answer:
G proteins, also known as guanine nucleotide-binding proteins, are a family of proteins that act as molecular switches inside cells, and are involved in transmitting signals from a variety of stimuli outside a cell to its interior. ... G proteins belong to the larger group of enzymes called GTPases.
When an enzymatic reaction is in progress, do you expect to see an increase, decrease or no change in each of following: (i) substrate (ii) product (iii) enzyme
Answer:
During Enzymatic reaction, enzymes binds to a substrate to form a which then forms the product.
Substrate: A reactant in an enzymatic or chemical reaction is called substrate. Product: The final outcome or substance after completion of reaction is called product.Enzyme: Enzyme helps to increase the rate of reaction and act as a catalyst.Change in shape of substrate, product and enzymes depends on the temperature outside the optimal range which affect bonding between enzyme and substrate. Enzymes definitely changes their size when bind to substrat and the process is called induced fit which increases the rate of reaction.
During an enzymatic reaction, their is an decrease in the concentration of substrate, an increase in the concentration of product, and no change in the concentration of the enzyme.
What is enzymatic reaction?A reaction, which is mediated with the help of an enzyme is termed as enzymatic reaction. A substance, which functions as a catalyst in living organisms and regulate the rate at which the chemical reactions takes place is known as an enzyme.
The enzymatic reactions follows the lock and key model, in which the free enzyme combines with the substrate and forms the enzyme-substrate complex, this is further catalyzed into the enzyme-product complex, from which the free enzyme and product get discharged. The product never further binds with the free enzyme.
In the reaction, the substrate get used up thus its concentration decreases, while the formation of product takes place thus its concentration increases. However, there is no change in the concentration of the enzyme as it does not get used up in the process.
Thus, in enzymatic reaction, substrate decreases, product increases, and enzyme concentration remains the same.
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g why did you digest the plasmid with XhoI? What is your expectation if the plasmid is a closed vector without an insert? What is your expectation if your plasmid has an insert (how many bands, what are their sizes)?
Answer:
I digest the plasmid with Xholin so as to find out the total size of the plasmid after insertion of the gene of interest and whether or not the insert went into the vector. Ao the plasmid is a reclosed vector without an put we expect to see one band. However, if the plasmid has an insert, we expect to see two bands on the gel
How do animals survive along the deeper parts of the seafloor? A They feed at the surface. B They feed on each other. C They photosynthesize.
Answer:
They photosynthesize..
Explanation:
There are several ways deep ocean animals survive in such an enviournment..Food is scare in much of the deep sea, in parts because photosynthesis only thakes place at the ocean's surface where there's sunlight. Most animals cope with this by begin very small and meeding less to eat of by growoing very slow..
Answer:
the answer is They photosynthesize..
Explanation:
Knowledge of the driver mutations underlying cancer has led to targeted therapeutics, such as the protein kinase inhibitor imatinib (trade name Gleevec) in cases of chronic myeloid leukemia. Cancer cells often become resistant to a given drug, so researchers continue searching for new drugs that target proteins that contribute to the cancerous phenotype. One recent promising approach uses drugs that lead to ubiquitination and proteasomal degradation of the target protein. Which of the following mutated proteins are good candidates for this approach?
A) oncogenes
B) proteins with loss-of-function mutations
C) proteins with gain-of-function mutations
D) tumor suppressor genes
Answer:
C) proteins with gain-of-function mutations
Explanation:
Gain-of-function mutations: In biology, the term "gain-of-function mutation" is described as one of the different types of mutation in which the altered or changed "gene product" consists of an entirely new pattern or molecular function associated with gene expression. However, the "gene-of-function mutations" are being always considered as "Semidominant or Dominant".
In the question above, the correct answer is option C.
Aquatic organisms in coastal areas face a variety of predators on land and in the water and air. Which ocean process exposes the coastal aquatic organisms to land-based predators? a. Changing wind patterns alter the ocean currents, changing tide levels. b. Daily tidal patterns leave areas exposed to the land for part of the day. c. The constant wave action generates nutrients that attract predators. d. The ocean conveyor belt raises and lowers the water levels on the coasts.
Answer:
b
Explanation:
The correct answer as to the ocean process that exposes the coastal organisms to land-based predators would be the daily tidal patterns that leave the coastal area exposed to the land for a part of the day.
Some parts of the coastal areas become exposed to land during certain periods of the day as a result of tidal waves. When this happens, the aquatic organisms occupying these coastal areas become temporarily exposed to land predators who hunt and kill them for food.
Therefore, the correct option is b.
____________ a regulatory protein that may bind DNA to inhibit transcription. ____________ a DNA sequence that binds a regulatory protein. ____________a DNA sequence that binds RNA polymerase and regulates transcription. ____________a compound that interacts with another protein or compound to form an active repressor ____________a compound that induces or activates transcription, such as lactose.a. Repressorb. Operator c. Promoterd. Corepressore. Inducer
Answer:
A repressor is a regulatory protein that may bind DNA to inhibit transcription. An operator is a DNA sequence that binds a regulatory protein. A promoter is a DNA sequence that binds RNA polymerase and regulates transcription. A corepressor is a compound that interacts with another protein or compound to form an active repressor. An inducer is a compound that induces or activates transcription, such as lactose.
Explanation:
Repressor proteins bind to DNA and RNA to suppress target gene expression. A DNA repressor blocks transcription by inhibiting the attachment of RNA polymerase to the promoter sequence, while an RNA repressor bind to the mRNA to block translation of the protein. An operator is a DNA sequence required for the attachment of transcription factors. The genes that are transcribed by the binding of a transcription factor to an operator sequence are collectively referred to as an operon. Operons are generally found in prokaryotes but they also can be found in some eukaryotes including Caenorhabditis elegans and Drosophila melanogaster. An inducer is a molecule that activates gene transcription either by binding to repressors/corepressors (thereby inactivating their functions) or by binding activators. For example, the allolactose act as an inducer of the lac operon.
A layer of cells called the endodermis surrounds the stele. Xylem is found towards the center of the stele and phloem towards the outside of the stele. 18) How does this compare to their arrangement in the stem? 19) The meristematic region is protected in the root by the presence of a root cap. How is the meristematic region protected in the stem tip? 20) In which of these regions would you expect to find the specialized cells of vascular tissue? 21) In which of these regions are the cells genetically identical? 22) Why?
Answer:
Epidermis layer is responsible for the protection of meristematic region.
Explanation:
Meristematic region is protected in the stem tip by epidermis which consist of dead layer of cells. Epidermis is the outer layer of stems, leaves, flowers and fruits which is responsible for the protection of inner part from damage. Vascular bundle such as phloem present near the boundary of the stem while the xylem is present in the inside of the stem. In the inside layer of the stem, all the xylem cells are genetically identical while the layer that is present at the edge of the stem is phloem in which all the cells are genetically identical to each other.
DNA is transcribed to messenger RNA (mRNA), and the mRNA is translated to proteins on the ribosomes. A sequence of three nucleotides on an mRNA molecule is called a codon. As you can see in the table, most codons specify a particular amino acid to be added to the growing protein chain. In addition, one codon (shown in blue) codes for the amino acid methionine and functions as a "start" signal. Three codons (shown in red) do not code for amino acids, but instead function as "stop" signals.
Sort the following ten codons into one of the three bins, according to whether they code for a start codon, an in-sequence amino acid, or a stop codon
AUG, UAG, UAA, UGA, AAA, UGC, AUC, CAC, GCA, ACU
Answer:
start codon - AUG
in-sequence amino acid - AAA, UGC, AUC, CAC, GCA, ACU
stop codon - UAA, UAG, UGA
Explanation:
From the amino acid chart, the start codon is represented by the codon AUG which also code for the amino acid methionine. There are three stop codons including UAA, UAG, and UGA. The stop codons signal the end of the translation process of the mRNA. Every other codon within the mRNA chain codes for different amino acids except methionine.
Hence, using the attached amino acid chart:
start codon - AUG
in-sequence amino acid - AAA, UGC, AUC, CAC, GCA, ACU
stop codon - UAA, UAG, UGA
Which is biotic?
O water
O temperature
beeswax
rocks
Beeswax because it is a livong thing
The biotic factor among the options given is beeswax, which is the third option, as the biotic factors are living or once-living organisms in an ecosystem that directly or indirectly affect other organisms.
What is a "biotic factor"?Biotic factors are living or once-living components of an ecosystem that have a direct or indirect effect on the survival, growth, and reproduction of other living organisms. Examples of biotic factors include plants, animals, fungi, bacteria, and other microorganisms that are part of the ecosystem. Beeswax, as mentioned, is a biotic factor because it is produced by living organisms, specifically bees. Beeswax is used by bees to build their hives or nests, which are important structures for their survival and reproduction.
Hence, the biotic factor among the options given is beeswax, which is the third option.
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which word of the poem are an example of a simile
Answer:
I don't know what exactly you are asking so
A simile is comparing 2 thing using "like" or "as"
Example: Her cheeks were red as a rose
The root of mutualism, mutual,
means...
A. together.
B. alone.
C. only.
Answer:
A. Together.
Explanation:
The root word of mutualism, mutual means together or a thing that many people share.
For example:
Mutualist Symbiotic Relationship refers to a relationship in which organisms are benefited, in other words it is a win-win.
The relationship between the Egyptian plover bird and the crocodile, that is mutualist relationship.
When a meat or something (food) gets stuck in the teeth of the crocodile then the Egyptian plover bird takes it out (like a toothpick).
The crocodile gets benefited.
The bird also gets benefited (its gets its food)
Hope this helps ;) ❤❤❤
Answer:
together
Explanation:
Mutualism is defined as a relationship that benefits two organisms, or it is defined as a doctrine in sociology where mutual aid is beneficial to society and the individual. An example of mutualism is pollination which is when bees take nectar from flowers and then deposit the nectar on another flower.
Given the gene sequence GGACCGTCGATCTTC, which of the following choices would
represent an inversion mutation?
A. CCACCGTCGATCTTC
B. GGACCG TCGATC TTC
C. GGACCGTCGATCCTT
D. GGAC TCGATC TTC
Answer:
I would go with A maybe,am not really sure though.
What is a peer review? Why is it important?
Answer:
Peer review involves subjecting the author's scholarly work and research to the scrutiny of other experts in the same field to check its validity and evaluate its suitability for publication. A peer review helps the publisher decide whether a work should be accepted.
ABO blood type is examined in a Taiwanese population, and allele frequencies are determined. In the population,
f (IA) = 0.30,
f(IB) = 0.15, and
f (i) = 0.55.
What are the frequencies of the various genotypes and various phenotypes in this population? Assume Hardy-Weinberg equilibrium.
Answer and Explanation:
Due to technical problems, you will find the answer and explanation in the attached file.
A paleontologist finds a relative complete skeleton but isn't sure if it is an ape fossil or a hominid fossil. Which of the following features would help distinguish between the two choices?
a. Position of the opening in the skull for the spinal cord
b. Design of the pelvis
c. Relative length of the hind limbs
d. Position of the eyes
Lactose (milk sugar) is a carbohydrate that is formed by combining galactose and glucose. Which term best describes this molecule?
Answer:
disaccharide
Explanation:
A disaccharide is a form of sugar that is made up of the combination of two other sugar molecules that are simple. They possess the property to dissolve easily in water. The process that occurs to join the two simple sugars includes the removal of water from the molecules. Sucrose, lactose, and maltose are the three disaccharides.
Answer:
disaccharide
Explanation:
A disaccharide is a form of sugar that is made up of the combination of two other sugar molecules that are simple. They possess the property to dissolve easily in water. The process that occurs to join the two simple sugars includes the removal of water from the molecules. Sucrose, lactose, and maltose are the three disaccharides.
how can an objects volume be determined using water displacement ?
Answer:
Using a graduated cylinder.
Explanation:
By using a graduated cylinder we can determine the volume of liquids.
(1)Volume of liquid=10cm^3
(2)Volume of liquid after adding an irregular substance exceeds the first one by 20cm^3
(1)V+(2)V=(3)Vtotal
10cm^3+20cm^3=30cm^3
Hope this helps ;) ❤❤❤
Climate change and succession both result in a change to the ocean ecosystem. What is succession?
a. Succession is a gradual change to ocean temperatures.
b. Succession is a gradual change to ocean communities.
c. Succession is a rapid change in ocean temperatures.
f
d. Succession is a rapid change to ocean communities.
Answer:
b. Succession is a gradual change to ocean communities
Explanation:
An ecosystem can undergo changes in it's structure and composition over a particular period of time. This term is called ECOLOGICAL SUCCESSION. Succession is the gradual change that occurs to a community over time. Succession is of two types; primary and secondary succession.
According to the question, climate change and succession are causes of change to the ocean ecosystem. Hence, succession there represents the gradual change that occurs to the structural composition of ocean ecosystem over time.
Answer:
The answer is B - Succession is a gradual change to ocean communities
Explanation:
Think of primary and secondary succession, these processes take time.
Which of the following pairs of plants are rhizomes?
A. Cocoyam and Cassava
B. Canna lily and ginger
C. Onion and Garlic
D. Banana and plantain
Answer:
B.
Explanation:
Examples of plants that are propagated this way include hops, asparagus, ginger, irises, lily of the valley, cannas, and sympodial orchids. Some rhizomes that are used directly in cooking include ginger, turmeric, galangal, fingerroot, and lotus.
In most organisms, the end product of glycolysis is pyruvate. Pyruvate still contains a substantial amount of energy, which can be further extracted. Whether the organisms are operating under aerobic or anaerobic conditions determines the metabolic pathway that pyruvate undergoes to produce more ATP. In this tutorial, you will identify the end products of these metabolic pathways.
Answer:
Pyruvate helps in the production of ATP.
Explanation:
The molecule of pyruvate converted into acetyl CoA. Then each molecule which is produced during glycolysis loses electron and carbondioxide releases. After the breakdown of pyruvate, the electrons loses by pyruvate are transferred to NAD+ in order to produce NADH, which will be used by the cell to produce energy molecule such as ATP. So we can say that pyruvate plays a vital role in the formation of ATP molecule.
For lions how can we determine who the father is
Fermentation converts organic material into a fuel whose primary component is
A. methane
B. sugar
C. yeast
D. alcohol
Answer:
D. alcohol
Explanation:
Fermentation by microorganisms converts organic materials into alcohol
Watch the video and answer the question in 2 or 3 paragraphs. What are the main causes of air pollution? Discuss some effects of air pollution and provide possible solutions to this environmental issue. https://youtu.be/_dTtvtlct9k
Answer:
Explanation:
Exhaust from vehicles, factories, volcanoes and wildfires are the major causes of air pollution.
Effects of air pollution include many diseases. For example heart disease, lung disease, respiratory diseases etc... They also damage nerves, brain, kidney, lungs, heart etc...
Solution to air pollution:
We should replace the fossil fuels with natural energies like solar, wind, geothermal, hydro etc...
Waste water treatment
Dust control
Hope this helps
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Which enzyme is used in gluconeogenesis, but NOT in glycolysis? Group of answer choices PEP carboxykinase enolase (interconverts 2-phosphoglycerate and phosphoenolpyruvate)
Answer:
PEP carboxykinase
Explanation:
PEP carboxykinase is also known as Phosphoenolpyruvate carboxykinase. It is an enzyme which is used for the production of glucose from non-carbohydrate carbon substrates. This enzyme is used only in gluconeogenesis not in glycolysis because this enzyme helps in the production of glucose while glycolysis is a process in which the glucose break down into pyruvate and ATP molecules.
In humans, insulin is manufactured in the pancreas, insulin is a peptide hormone that causes the body’s cells to take up glucose. The blueprint for the polypeptide chain that is insulin is found in the — of specialized pancreatic cells.
Answer:
In type 1 diabetes the immune system erroneously attacks the beta cells that produce insulin in your pancreas. It causes permanent damage, leaving your pancreas unable to produce insulin. Exactly what triggers the immune system to do that isn't clear. Genetic and environmental factors may play a role.
Explanation:
Nucleic acids
Composed of Carbon, Hydrogen, Oxygen, Nitrogen and phosphorous.
DNA
The universal code that stores genetic information in all organisms
Semi
conservative-Bases in original strand split and new nucleotides complementary base pair to form two new strands
Mutations
Any change to the DNA sequence
Gene mutation
Permanent change in the DNA sequence that makes up a gene.
Transcription
The process of copying a nucleotide sequence of DNA to form a complementary strand of mRNA
Translation
Process by which mRNA is decoded and proteins are made.
Codon
Three nucleotide bases
tRNA
Reads the codon on the mRNA using anticodons and the complimentary base pair rules and delivers the amino acids
What would be the replicated DNA strand for the following DNA sequence?...GCGTATG
CGCATATC
What would be the mRNA and tRNA be for the following DNA sequence?...AGGTTA
mRNA...UCCAAU. tRNA...AGGUUA.
The process of converting the genetic message from DNA into ____ is called transcription.
mRNA
How many amino acids are in the human body and what do we call the bond that holds them together?
20; Peptide bond
A single strand of DNA contains the following nine nucleotides in order ACTTATGGA. What sequence of bases will be present on the complementary strand of DNA?
TGAATACCT
In humans, insulin is manufactured in the pancreas. Insulin is a peptide hormone that causes the body's cells to take up glucose. The blueprint for the polypeptide chain that is insulin is found in the __________ of specialized pancreatic cells.
DNA
Given the sequence of DNA nucleotide bases TTAGCCTTG, give the complementary mRNA produced during transcription.
AATCGGAAC
Identify the correct sequence of molecules, as a gene goes from coded information in the nucleus, to the product the cell wants to make.
DNA...messenger RNA...transfer RNA...Protein
Why is DNA replication considered semiconservative?
Each half of the old DNA strand serves as a template for the new growing strand causing the copied DNA to half new and half old.
ASAP When ______ is hydrolyzed, it forms _______. A. protein, amino acids B. ATP, ADP C. polysaccharide, monosaccharide D. lipid, triglyceride
Answer:
The answer is ATP, ADP
Explanation:
When protein is hydrolyzed, it forms amino acids. Thus, the correct option is A.
What is Hydrolysis?Hydrolysis may be defined as a chemical process that utilizes the molecules of water that involve the chemical breakdown of a compound.
Amino acids are the monomers of protein. These amino acids are linked together by peptide bonds. But the process of hydrolysis breaks the peptide bond between the amino acid sequences and released them significantly in free form.
Therefore, when protein is hydrolyzed, it forms amino acids. Thus, the correct option is A.
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What is a factor of nutrient collapse?
Answer:
The nutrient collapse that atmosphere is change that food we eat and no is paying attention.
Explanation:
Nutrient collapse in the agriculture research it the mos important foods been getting nutrition less, they generally vegetables, fruits minerals and vitamin, protein content has to past.
The researching choosing crops for higher yields and nutrition and wheat to less nutrient,fruits and vegetables that form protein to calcium, iron and vitamin are varieties choosing to grow.
Atmosphere may be change and food we eat,and human needs a oxygen and they plants need a carbon dioxide, and the level the atmosphere is rising.
Carbon dioxide is the atmosphere in turn the contributes to the plant growth,and food production an quality of food is better.
Human nutrient linked through a quality of plants and affected the balance of nutrient in rice, crop and they people rely on, human chain need to measured and understood.
It simply not discussed to the agriculture and health public or nutrient communities.
