Answers
Answer:
A) The continents were at one point a single large landmass
Explanation:
This is the most probable event and is a common fact. You see many different habitats have the same properties but are in two different places.
Related Questions
A plasmid that encodes resistance to ampicillin and tetracycline is digested with the restriction enzyme PstI, which cuts the plasmid at a single site in the ampicillin-resistance gene. The DNA is then annealed with a PstI digest of human DNA, ligated, and used to transform E. coli cells. What antibiotic-resistance phenotype(s) (characteristics) will be found on the plate
Answers
Answer: Tetracycline.
Explanation:
A plasmid is a small circular DNA molecule found in bacteria that is separate from the bacterial chromosome and replicates independently of it. They encode for certain genes that play a key role in antibiotic resistance. Restriction enzymes are endonucleases that catalyze the cleavage of phosphodiester bonds in different regions located within a DNA strand. PstI is an example of an endonuclease, it is a type II restriction enzyme produced by the microorganism Providencia stuartii that possesses a restriction target in double-stranded DNA dependent on an unmethylated, palindromic, asymmetric sequence, and in this example, it cuts the plasmid at a single site in the ampicillin-resistance gene. After that, the DNA is annealed with another fragment of DNA and this new recombinant molecule is used to transform E. coli cells. Transformation is a key step in DNA cloning because it occurs after restriction enzyme digestion and ligation treatments and transfers newly made plasmids into bacteria. So these bacterias will have a new fragment of DNA, which still has a tetracycline resistance gene but it no longer has the ampicillin resistance gene because it was disrupted by the restiction enzyme. Thereby, the antibiotic resistance phenotype is the tetracycline resistace.
Star A has a surface temperature of 8000K and its thermal emission peaks around 360nm. Star B is twice as cold, with a temperature of 4000K. Its thermal emission must peak around...
Question 3 options:
90nm
180nm
360nm
725nm
1450nm
Answers
Answer:
180 hope this helps tell me if its wrong
Explanation:
what type of cell can develop into different types of blood cells in the body
Answers
Answer:
The multipotent hematopoietic stem cells give rise to many different cell types, including the cells of the immune system and red blood cells.
Explanation:
Which is true of electric cars?
Answers
Answer:
that they have more problems than other cars because of the engery it uses
hope that helped lowk;)
Does mutation decrease or increase genetic variation
Answers
Answer:
Mutations are changes to an organism's DNA and are an important driver of diversity in populations. Species evolve because of the accumulation of mutations that occur over time. ... This mutation has introduce a new allele into the population that increases genetic variation and may be passed on to the next generation
Which property (quality) of fossils allows scientists to determine the relative ages of rock layers?
A.Fossils show change over time as species evolve.
B.Fossils form from the remains of living organisms.
C.Fossils are usually found only in sedimentary rock.
D.Fossils can be analyzed to determine their exact age
Answers
Hope this can help you
The property (quality) of fossils allows scientists to determine the relative ages of rock layers are fossils show change over time as species evolve.
What is the minimum age of a fossil?A living being that lived more than 11 thousand years ago is considered a fossil, that is, before the Holocene, which is the current geological epoch. Ancient remains or evidence, but less than 11,000 years old, such as sambaquis, are classified as subfossils.
Chemistry is present in this process, more precisely the element Carbon. The dating of a fossil can be done based on the already known percentage of Carbon-14 (C14) in relation to Carbon-12 (C12) of living matter (without decomposition).
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In mitosis, the DNA is replicated once, while in meiosis it is replicated twice.
True or False?
Answers
Answer:
False
Explanation:
Like mitosis, meiosis is a form of eukaryotic cell division. However, these two processes distribute genetic material among the resulting daughter cells in very different ways. Mitosis creates two identical daughter cells that each contain the same number of chromosomes as their parent cell. In contrast, meiosis gives rise to four unique daughter cells, each of which has half the number of chromosomes as the parent cell.
Microbial food fermentation is often performed as a preservation method to inhibit the growth of food spoilage microorganisms that may be present in or on the food. The fermentation process often leads to an overall pH decrease of the food to levels below 4. This drop most likely causes many ________ to be inhibited.
Answers
Answer:
This question lacks options, options are:
A. Acidophiles B. Alkaliphiles C. Neutrophiles
The correct answer is A. This drop most likely causes many acidophiles to be inhibited.
Explanation:
Microbial fermentation is one of the basic biotechnical processes for the efficient formation of active substances. Fermentation uses fungi, bacteria or cell cultures to transform raw materials into chemicals. Acidophiles is usually bacteria and other very simple organisms that are capable of developing in conditions of too low a pH for most forms of life. Each microorganism has a pH range in which it can grow and a well-defined optimum pH. Depending on the pH, we find acidophiles (1.1 - 5.5), neutrophilic (5.5 - 8.0) and alkaline (8.5 - 11.5) microorganisms, which grow well in acidic, neutral and alkaline pH respectively. Fermentation is carried out to prevent the development of other microorganisms that can alter the quality of the food. Anaerobic digestion is a microbial fermentation in the partial or total absence of oxygen that gives rise to a mixture of gases, in which methane and carbon dioxide are mainly found. Anaerobic microorganisms mainly obtain their energy through the use of fermentation pathways, where organic compounds such as acids and alcohols, among others, basically serve as final electron acceptors. Bacteria, in carrying out these processes, are conditioned by some physical and chemical factors, which enable their proper development, these factors are: loads of organic matter, volatile fatty acids, temperature, alkalinity, nutrients and the presence of N and P , among others.
The digestion of food in the absence of oxygen and release of oxygen is called fermentation.
Microbes that perform the fermentation are usually anaerobic bacteria.
Microbial food fermentation is often performed as a preservation method to inhibit the growth of food spoilage microorganisms that may be present in or on the food. The fermentation process often leads to an overall pH decrease of the food to levels below 4. This drop most likely causes many acidophiles to be inhibited.
Acidophiles or acidophilic organisms are those that thrive under highly acidic conditions.
The lower ph makes the food acidic, due to acidic in nature the bacteria are not able to survive in that conditions.
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Which organelle is most similar to the nervous system based on its function
Answers
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.
Someone please help! I will mark you as brainlist!!o
Answers
Answer:
cycadophyte
Explanation:
cycadophyte
Select the correct answer.
Wanda owns a dog. She takes the dog for a routine examination to her veterinarian. The veterinarian tells her that her dog's kneecap is not
properly centered over the knee. Which disorder does this indicate?
OA.
osteoarthritis
OB. cruciate ligament disease
OC. patellar luxation
OD. hip dysplasia
Answers
Answer:
d
Explanation:
Answer:
patellar luxation
Explanation:
I got it correct on edmentum
(b) Using the template of the phylogenetic tree, circle the lineages that share node
Answers
Complete question:
(b) Using the template of the phylogenetic tree, circle the lineages that share node A. You will find the tree in the attached files.
Answer:
The Lineages that share node A are
Chinese river dolphinAmazon river dolphinLa Plata river dolphinDolphinsNarwhalPorpoisesExplanation:
The phylogenetic tree is composed of,
Lineages → These are the taxonomic groups of interest placed in the extremes of the lines called branches. Nodes → These are the ramification points, which are also known as divergence points. They represent the location of the most recent common ancestor. Root → This is the older common ancestor that all lineages share. The first one in the tree.- Two or more lineages are more related to each other if they share a recent common ancestor. This means that they all diverge from the same node.
- Two or more lineages are less related to each other if they lack a recent common ancestor. This is, the node from which these lineages diverge is placed far away in the tree.
There are also different phylogenetic relationships between lineages.
Apomorphies → Occur when the involved lineages share a trait that they inherited from their most recent common ancestor. This trait evolved for the first time in this ancestor. → This relationship is a homology.Plesiomorphies → occur when the involved lineages share a trait inherited from a common ancestor, but that is older concerning the present traits exhibited by other descendants of the same common ancestor. → This relationship is a homology.Homoplasy → Lineages share a trait that evolved independently in each group. → This relationship is an analogy.Firstly the question is incomplete the image is not attached with it which shows the phylogenetic tree.
The Lineages that percentage node A are
Chinese river dolphin river dolphinLa Plata river dolphinDolphinsNarwhalPorpoisesThe phylogenetic tree consists of:
Lineages → These are the taxonomic companies of hobby located withinside the extremes of the traces referred to as branches.Nodes → These are the ramification points, that are additionally called divergence points. They constitute the area of the maximum latest not unusual place ancestor.Root → This is the older not unusual place ancestor that every one lineages percentage. The first one withinside the tree.- Two or extralineages are extra associated with every difference in the event that the percentage a latest not unusual place ancestor. In this manner, all of them diverge from the equal node.Two or extra lineages are much less associated with every difference in the event that they lack a latest not unusual place, ancestor. This is, the node from which those lineages diverge is located a long way away withinside the tree.
There also are one-of-a-kind phylogenetic relationships among lineages.
• Apomorphies → Occur while the worried lineages percentage a trait that they inherited from their maximum latest not unusual place ancestor. This trait developed for the primary time on this ancestor. → This dating is a homology.
• Plesiomorphies o( while the worried lineages percentage a trait inherited from a not unusual place ancestor, however, this is older regarding the prevailing developments exhibited via way of means of different descendants of the equal not unusual place ancestor. This dating is a homology.
• Homoplasy → Lineages percentage is a trait that developed independently in every group. → This dating is an analogy.
What is the phylogenetic tree?
The phylogenetic tree is the branching diagram showing the evolutionary relationships among various biological species.
Thus it is clear from the above answer.
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You are given a constitutive mutant, but you are not told whether it is constitutive due to a repressor mutation (i-) or an operator mutation (oc). Determine what could be added to the system that would allow you to determine the difference between the two mutants. You will add the same thing to each and indicate the results of the experiment.
Answers
Answer:
Explanation:
Repressor molecules, as we recognize them to be proteins occur as transcription factors that may function on their binding sites within the same genome or even on a different genome.
As a result, repressor molecules behave in a trans-active manner. Operator, on the other hand, acts as a binding site mostly on the chromosome genome which can only trigger downstream genes. As a result, Operators are cis-acting.
In this scenario, if we give the system a Plasmid containing a wild-type repressor gene, the repressor molecules would only attach to the usual Operator sites.
In the 1st scenario:
The Operator is regular and normal, but I- is mutated. As a consequence, the additional extra plasmid's normal repressor molecules will stick to the operator site, causing suppression or repressed expression.
In the 2nd scenario: genome
The repressor is natural, but Oc is mutated. As a consequence, the additional extra plasmid's normal repressor molecules would not adhere to the operator region, resulting in the same Constitutive expression.
what's assembled during the second step of protein synthesis
Answers
Answer: Translation is the second step in protein synthesis. It is shown in Figure below. Translation takes place at a ribosome in the cytoplasm. During translation, the genetic code in mRNA is read to make a protein. In the first step, called transcription, the genetic code in DNA is copied by RNA. In the second step, called translation, the genetic code in RNA is read to make a protein. A mutation is a change in the base sequence of DNA or RNA.
Explanation:
B) median is greater than mean
Answers
Answer:
Yes, correct.
Explanation:
Biological classification is important because it allows scientists to study organisms in a ____ way? A.mnemonic, B.cladistic, C.problematic D.systematic
Answers
In an energy pyramid, which level has the most available energy?
A.Producer level
B.First level consumer
C.Second level consumer
D.Third level consumer
Answers
Answer:
The correct answer is -A. producer level.
Explanation:
the first trophic level is the level of photosynthetic organisms they produce their food and energy on their own from the ultimate source of energy, the Sun. This is why they are called producers.
Producers have the most energy in any ecological ecosystem as all other organisms get food from these directly or indirectly. Only 10 percent of total energy is transferred from one trophic level from producers to the next tropic level through consumers of different trophic levels.
As a scientific concept, race Group of answer choices A. is very significant because it gives us a clearer understanding of human behavior than the concept of culture provides. B. is evidenced by the exclusive possession of particular types of genes. C. aids in explaining human diversity. D. is not very significant because it gives us little insight into human behavior. E. Both B and D
Answers
Answer:
D. is not very significant because it gives us little insight into human behavior.
Explanation:
Science can be defined as a branch of intellectual and practical study which systematically observe a body of fact in relation to the structure and behavior of non-living and living organisms (animals, plants and humans) in the natural world through experiments.
As a scientific concept, race is not very significant because it gives us little insight into human behavior.
This ultimately implies that, race is a scientific concept that holds no significant or absolute value since the nineteenth century.
Hence, the difference between humans shouldn't be described based on race according to the United Nations Educational, Scientific and Cultural Organization (UNESCO).
Which describes the struktures shown below the soil line?
A. glucose is made here
B. absorbs water and minerals
C. contains vascular tissue
D. B and C are correct
Answers
Answer:
its D
Explanation:
Its D cause plants use their roots to get water and the vascualar tissues are found in the root most of the time.
In a genetic cross, a Punnett square is used to determine the possibilities of the genotypes and
among the offspring.
Answers
In a genetic cross, a Punnett square is used to determine the possibilities of the genotypes and phenotypes among the offspring.
Genetics can be defined as the scientific study of hereditary and all of its components (genes) within the body of an organism.
A Punnett square can be defined as a square diagram that is used to predict the possible allelic combinations of gametes in a particular breeding (cross) experiment of parent organisms with known genotypes and phenotypes.
Basically, a Punnett square is a visual representation which was developed in 1905 by Reginald C. Punnett.
In conclusion, a Punnett square is typically used to predict the probability of the genotypes and phenotypes among the offspring in a cross experiment of parent organisms.
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An animal with a larval form that disperses by drifting in ocean currents and an adult form that is attached to a surface is most likely to exhibit ______ as a larva and ______ as an adult. bilateral symmetry . . . bilateral symmetry bilateral symmetry . . . be asymmetrical radial symmetry . . . radial symmetry radial symmetry . . . bilateral symmetry bilateral symmetry . . . radial symmetry
Answers
Answer:
Bilateral symmetry as a larva
Radial symmetry as an adult
Explanation:
Bilateral symmetry refers to the division of the animal through a longitudinal plane, int two mirror-image, right and left halves, as seen in organisms such as insects, reptiles or in man. Animals with bilateral symmetry have anterior and posterior halves (head and tail), dorsal and ventral (front and back), and right and left sides. Most animals are bilaterally symmetrical. Animals with bilateral symmetry are best suited for active lifestyles involving streamlined and directional motion.
Radial symmetry refers to the arrangement of body parts around a central axis, just like rays on a sun, ie.they have bodies that seem to radiate outwards from a central point. Animals that are radially symmetrical have top and bottom surfaces only but no left and right sides, or front and back sides. Animals that have radial symmetry are best suited for sedentary lifestyles and are usually attached to some surface (sessile)
An animal with a larval form that disperses by drifting in ocean currents and an adult form that is attached to a surface is most likely to exhibit bilateral symmetry as a larva and radial symmetry as an adult.
How are transitional fossils evidence to support the process of natural selection?(1 point)
A) They show intermediate steps in the evolution process.
B) They show that most species have not changed over long periods of time.
C) They show plants and animals that once existed but do not exist now.
D) They show that every species of animals developed separately.
Answers
Answer:
1. Individuals with thicker fur had a survival advantage in the cold...
2. Random mating
3. The green skin color is being selected over blue skin color.
4. DNA.
5. They show intermediate steps in the evolution process.*
6. Different islands had very different food resources available...
7. Those who have traits that help them survive are able to reproduce...
8. It makes them unrecognizable to the immune system
9. The exposure of human populations to less UV light required...
10. The correlation between air pollution and white moth predation
11. It is a biological process that leads a population to have a widespread...
12-16 Essays
Explanation:
Good luck ♡
Transitional fossil evidence shows intermediate steps in the evolution process. So, the correct option is A.
What do you mean by Fossil?Fossils may be defined as the preserved remains, or traces of remains, of ancient organisms. They are dead and organic remains of past organisms.
Transitional fossil evidence would show intermediate forms of a species and they changed and accumulated adaptations at a slow pace. These are remnants of an organism that came in the version of the current species.
Therefore, Transitional fossil evidence shows intermediate steps in the evolution process.
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most of a cell's life is spent in carrying out its specific tasks
Answers
Answer:
INTERPHASE
Explanation:
Question 7 (2 points)
How are chemical and physical changes different on a molecular level? (2 points)
Chemical changes involve the breaking of bonds in molecules.
Chemical changes do not affect bonding between atoms.
C
Physical changes do not involve molecules.
Physical changes cause new molecules to form.
Answers
What is the relationship among force, mass, motion and speed of motion?
Answers
Hydrochloric acid in the stomach provides an acidic medium that is essential for the activity of
digestive enzymes.
O True
O False
Answers
11. When an organism joins a new population, its genes become part of the 2 points new population's gene pool. How does this gene flow affect populations? A. Gene flow between populations has no effect on the gene pool. B. Gene flow between populations increases genetic diversity over time. C. Gene flow between populations decreases genetic diversity over time. D. Gene flow increases the chance for reproductive isolation which can cause new species to form.
Answers
All blood vessels containing oxygenated blood are colored red EXCEPT for ?
Answers
Answer:
deoxygenated blood i think
Explanation:
A segment of a DNA strand is shown. AGGTCAGG
a. What is the complementary DNA strand?
b. What is the mRNA strand?
c. What amino acids are produced as a result (use the codon chart to help you)
Answers
Answer:
b. messenger ribonucleic acid
a. The complementary DNA strand is the sequence that pairs with the given DNA strand. In DNA, adenine (A) pairs with thymine (T), and cytosine (C) pairs with guanine (G). Therefore, the complementary DNA strand of "AGGTCAGG" would be "TCCAGTCC".
b. The mRNA strand is synthesized based on the complementary DNA strand. In mRNA, thymine (T) is replaced by uracil (U). Therefore, the mRNA strand corresponding to the given DNA sequence "AGGTCAGG" would be "UCCAGUCC".
c. To determine the amino acids produced, we need to identify the codons (groups of three nucleotides) in the mRNA strand and refer to a codon chart (also known as a genetic code chart). Here's an example of how the codons in the mRNA strand "UCCAGUCC" can be translated:
UCC (Serine)
AGU (Serine)
CCU (Proline)
Therefore, the resulting amino acid sequence would be Serine-Serine-Proline.
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How were the mountains surrounding the Canyon formed?