The function of lacI in the regulation of the lac operon is that it encodes a repressor that, in the absence of lactose, binds to the lac operator and blocks the expression of the structural genes. Thus, the correct option is C.
What is Lac operon?Lac operon may be defined as an operon or a set of genes with a single promoter that encodes genes for the carrier and metabolism of lactose in E. coli and other bacterial species.
The concept of the operon was first proposed by Jacob and Monod in 1961.
The lacI gene product, the lac repressor, is expressed from a separate transcriptional unit upstream from the operator.
When lactose is absent, the lacI gene regulates and produces repressor mRNA which translates repression.
Therefore, it is well described above.
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Growth of chest hair, deepening of the voice, and muscle growth are secondary sex characteristics. Which structure or structures produce substances most likely to affect the development of these traits?
testes
ovaries
prostate gland
vulva
Answer:
testes
Explanation:
The increased secretion of testosterone from the testes during puberty causes the male secondary sexual characteristics to be manifested. In males, testosterone directly increases size and mass of muscles, vocal cords, and bones, deepening the voice, and changing the shape of the face and skeleton.
Answer:
testes
Explanation:
Growth of chest hair, deepening of the voice, and muscle growth are secondary sex characteristics and their developments are affected by testes
Which represents a negative impact of technology?
A. Accessible technology
B. Production of waste
C. Improvement in climate
D. Access to more resources
Answer:
B
because it is harmful
What are the two types of hypotheses used in a hypothesis test? how are they related?.
Answer:
the null hypothesis and the alternative hypothesis.
Explanation:
null contains a statement of equality (greather than or equal to, less than or equal to, equal to) and the alternative is the complement of the null hypothesis statement that must be true if H0 is false and it contains a statement of strict inequality (greater than, less than, not equal to)
This diagram shows a chemical reaction in which two glucose molecules combine to form a molecule of maltose.
Drag the labels to their appropriate locations in the diagram.
First, drag the labels of Group 1 to their respective targets to identify the types of sugars and the type of reaction shown.
Then drag the labels of Group 2 to their respective targets to identify the atoms, chemical groups, or molecules involved.
Not all labels will be used.
Option A is amino acids and D is peptide bond.
How protein is formed?Proteins are the polymer of amino acids which means that large number of amino acid combines to form protein molecule. The function of protein is to make muscle cells inside the body. The bonds present in protein are peptide bonds.
Proteins made up the structure of many enzymes or in other words, Enzymes are proteins that are comprised of amino acids which are linked together in one or more polypeptide chains.
So we can conclude that Proteins are the polymer of amino acids.
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Two students are planning an experiment that will test how planaria (aquatic flatworms) respond to different environments. They will conduct two investigations—one that tests the worms’ responses to different water temperatures and one that tests the worms’ responses to different levels of acidity. Student 1 wants to buy two groups of flatworms and use a different group for each investigation. Student 2 thinks the same group of worms should be used for both investigations.
Do you think either student’s method would give more accurate results? Why or why not? Explain your response.
Student 2 is correct and the same group of worms should be used.
What is an experiment?An experiment is the process by which we establish cause and effect relationships in science. The control variable are those that must be kept the same in the experiment.
We know that the experiment will only be valid if the research is carried out with the same group of worms. If different groups of worms are used, other factors may account for the results obtained.
Thus student 2 is correct and the same group of worms should be used.
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What accurately describes a difference between fungi and plants?
Fungi are different from plants in that they are achlorophyllous.
Fungi vs plantsFungi and plants are both eukaryotic in nature when it comes to their cells.
However, plants differ from fungi in that plants contain a green pigment known as chlorophyll while fungi do not. The green pigment enables plants to photosynthesize.
Thus, fungi are said to be achlorophyllous.
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which question can be using the scientific process
Answer:
I'm not great with this subject... but what are the questions given? I may be able to help in that way
Explanation:
When there are a lot of molecules in one place it is considered an area of:
When there are a lot of molecules in one place it is considered an area of high concentration. Details about concentration can be found below.
What is concentration?Concentration can be described as the amount of solute in a solution measured in suitable units.
The concentration of a solution is dependent on the amount of solute molecules in that solution.
A solution is said to have a high concentration if it has more solute molecules while a low concentration has less solute molecules.
Therefore, when there are a lot of molecules in one place it is considered an area of high concentration.
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When cartilage is produced at the epiphyseal side of the metaphysis at the same rate as bone is deposited on the opposite side, bones.
Answer:
grow longer
Explanation:
In a long bone, the epiphyseal is the growing region. In young bones, bone formation occurs in a layer of hyaline cartilage. The epiphyseal plate forms cartilage on the epiphyseal end. Cartilage is calcified on the diaphyseal side, and the diaphysis lengthens.
It starts to grow longer
Which of the following is the best definition of an unsaturated fatty acid? 8 A. A basic unit of a lipid that consists of single and double carbon-to- carbon bonds B. A compound that carries hereditary information C. An insoluble compound made up of glycerol and three fatty acids D. A basic unit of a lipid that consists of only single carbon-to-carbon bonds
Place the following in order of blood flow back to the heart.
- heart
- capillaries
- veins
- superior and inferior vena cava
PLEASE HELP! I WOULD APPRECIATE IT!
Which of the following is true about Earth's freshwater, air, soil and trees? A. Although these resources are renewable, their present benefits can be reduced if used carelessly. B. Although these resources are renewable, they present very few benefits for humans. C. These resources are nonrenewable, so humans must stop using them if they are to survive. D. Although these resources are nonrenewable, humans don't have to worry about conserving them.
Which of the following is true about Earth's freshwater, air, soil and trees?
A. Although these resources are renewable, their present benefits can be reduced if used carelessly.
B. Although these resources are renewable, they present very few benefits for humans.
C. These resources are nonrenewable, so humans must stop using them if they are to survive.
D. Although these resources are nonrenewable, humans don't have to worry about conserving them
‼️URGENT‼️
I really need help with this one problem
Answer:
C.
Explanation:
A. This makes no sense because the chart is only about the number of fish not about the number of plants that have grown
B. Makes no sense???
C. This is correct because it provides a reason why the number of fish in the stream next to the orchard have decreased
D. Makes no sense as well
What are the defining characteristics of reptiles?
Reptiles are a group of vertebrate animals in the Reptilia class.
What are reptiles?
They are animals in the Reptilia class. Their main characteristics include:
They have backbones.Their body temperature varies with that of the environment.Their bodies are covered with scales.Fertilization is internal and reproduction is by laying eggs or giving birth to live ones.More on reptiles can be found here: https://brainly.com/question/15147975
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determine the following describe an acid,base, or neutral substance
According to the research, acids and bases are two different types of substances opposite to each other and it is neutral when it is neither acidic nor alkaline.
What is an acid, base or neutral substance?An acid is that chemical substance capable of transferring protons (H+) to another chemical substance.A base is that chemical substance capable of capturing protons (H+) from another chemical substance.A neutral substance is one that when dissolved in water dissociates into its ions.Therefore, we can conclude that according to the research, acids and bases are two different types of substances opposite to each other and it is neutral when it is neither acidic nor alkaline.
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Which of these statements is NOT true of the phylogenetic tree?
The statement that says that the phylogenetic tree ranks organisms by importance in evolutionary history is false.
A phylogenetic tree is a branching diagram which shows how an organism is linked to its ancestorsIt depicts the relationship between various organisms who may have shared a common ancestorUsing a phylogenetic tree, we can are better able to pinpoint when and how a new species has evolvedIt shows how evolution has occurredWe have to keep in mind that phylogenetic trees are not always accurate, they are a form of hypothesesA phylogenetic tree does not rank organisms by their significance in evolutionary history.
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Your question was incomplete. Please check below the full content.
Which of these statements is NOT true of the phylogenetic tree?
A.It ranks organisms by importance in evolutionary history.
B.It depicts an organism's lineage as it changes over time
C.It shows successive events of speciation in which one species gives rise to two.
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Please help me answer this task about Plant Biotechnology
Answer:
Plant biotechnology can be defined as the use of tissue culture and genetic engineering techniques to produce genetically modified plants that exhibit new or improved desirable characteristics.
Explanation:
These crops offer several benefits both farmers and consumers.
...
Pocket K No. 2: Plant Products of Biotechnology.
Product Trait
Bean Virus disease resistance
Canola Herbicide tolerance, modified oil/fatty acid, pollination control system, phytase production
Cotton Herbicide tolerance, insect resistance, low gossypol
Eggplant Insect resistance
summary of what occurs during transcription
The act of copying information from a strand of DNA into a fresh messenger RNA molecule is called transcription (mRNA).
DNA preserves genetic material as a reference or template safely and permanently in the cell nuclei.
The process of gene expression starts with transcription. A gene's DNA sequence gets transcribed into RNA during this process. The DNA double helix must unwind close to the gene being transcribed before transcription can begin. A transcription bubble is the term for the area of opened-up DNA.
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Why do you think the bones of the legs are at particular risk for fractures in rod
Ozone consists of _______ molecules of oxygen, is found primarily in the ______ and protects us from ______
The blank spaces in the task content should be filled with is; Three(3), atmosphere and ultraviolet rays of the sun.
What is Ozone?Ozone is a trioxygen molecule; contained in the upper atmosphere with a sole aim of protecting biological life against ultraviolet rays of the sun. The ozone layer is however depleted to Oxygen molecule in the lower atmosphere.
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Active and passive immunity involves all of the following except receiving mother's antibodies through breast-feeding. exposure to a pathogen either naturally or by vaccination. memory B cells responding to a second exposure to the same pathogen. the stimulation of a nonspecific immune defense. receiving mother's antibodies through the placenta.
Explanation:
Immunity is the ability of an animal to resist infection.
There are two types of immunity in the body; INNATE OR INHERITED IMMUNITY AND ACQUIRED IMMUNITY. Inherited immunity it is the type of immunity that one is born with. It is passed from parent to offspring.
Acquired immunity is immunity to particular infections that is not inherited but has developed in the animal's life as it interacts with its environment. Acquired immunity can develop naturally in which case it is called NATURAL ACQUIRED IMMUNITY OR ARTIFICALLY.
ACTIVE IMMUNITY is the form of acquired immunity in which the body produces its OWN antibodies against infections. While PASSIVE IMMUNITY is the form of acquired immunity in which an individual is PROTECTED AGAINST INFECTION BY RECEIVING ANTIBODIES.
NATURAL ACQUIRED IMMUNITY
when attacked by the same pathogens again, they don't became seriously ill. this is because memory cells are able to recognise the antigens and stimulate the immune system to produce antibodies against the pathogens. This is known as NATURAL ACTIVE ACQUIRED IMMUNITY. It develops when one recovers from an infection.
During pregnancy, the mother passes antibodies across the placenta to the foetus. At birth the baby gets antibodies from the mother through breast milk. This is natural passive acquired immunity.
The amount of blood ejected with each beat of the heart is known as:
The amount of blood ejected with each beat of the heart is known as the Stroke volume
What is Stroke volume?Stroke volume is the volume of blood pumped out of the left ventricle of the heart during each systolic cardiac contraction.
It is the difference between end-diastolic and end-systolic volumes.
Thus, it is the volume ejected with each heart beat.
Hence, the amount of blood ejected with each beat of the heart is known as the Stroke volume
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Read the passage from "Names/Nombres" by Julia Alvarez.
Our first few years in the States, though, ethnicity was not yet “in.” Those were the blond, blue-eyed, bobby-sock years of junior high and high school before the sixties ushered in peasant blouses, hoop earrings, serapes. My initial desire to be known by my correct Dominican name faded. I just wanted to be Judy and merge with the Sallys and Janes in my class. But, inevitably, my accent and coloring gave me away.
Which detail best conveys the main idea that Alvarez wants to fit into her new culture?
Our first few years in the States, though, ethnicity was not yet “in.”
Those were the blond, blue-eyed, bobby-sock years of junior high and high school . . .
. . . before the sixties ushered in peasant blouses, hoop earrings, serapes.
I just wanted to be Judy and merge with the Sallys and Janes in my class.
The detail that best conveys the main idea that Alvarez wants to fit into her new culture is as follows:
I just wanted to be Judy and merge with the Sallys and Janes in my class.Thus, the correct option is D.
What is Ethnicity?Ethnicity may be expressed as the sociable group a person belongs to, and either recognizes with or is determined by others, as a consequence of a mixture of cultural and other elements including the tongue, diet, belief, origin, and physical attributes traditionally associated with race.
The context of this story illustrates the difficulty faced by Alvarez to fit into the American culture as she belongs of Latin origin.
She desired to match in and be tolerated in this civilization and that's why she expresses that she wanted to connect with the Sallys and Janes in her classroom, as they had the American prototype and culture that everyone respected.
Therefore, it is well described above.
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Why are stems so controversial
The stem cells are so controversial because it involves the destruction of the human embryo as well as its life for just research purposes only.
What are Stem cells?Stem cells may be defined as cells that are totipotent and pluripotent in nature and have the prospect to mature into many diverse types of cells in the body.
Embryonic stem cells are the type that is considered most unethical and controversial. The stem cell debate is the contemplation of the moralities of research involving the maturation and use of human embryos for only research methodologies.
Destruction of such important life for our own benefit or research purposes makes the podium controversial.
Therefore, it is well described above.
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Sort the activities based on whether they decrease or maintain biodiversity.
The activities that decrease the biodiversity are excessive mining to obtain minerals and releasing sewage water into lakes.
The activities that maintain biodiversity are planting more trees and prohibiting fishing during breeding season.
What is biodiversity?The range of plant and animals on the planet or in a specific natural surroundings, that is significant and desirable.
Nature was despite everything is a productive wellspring of motivation in drug store, beauty care products, and agro-food enterprises for the revelation of bioactive items.
Informatics is currently present in most human exercises. In silico devices might help in various situations while concentrating on normal substances: in pharmacognosy, to store and construction the enormous and expanding number of information, and to work with or speed up the examination of regular items concerning conventional purposes of normal assets; in drug revelation, to soundly plan libraries for screening normal compound mimetics and distinguishing proof of organic exercises for normal items.
The activities based on whether they decrease or maintain biodiversity are:
Maintains :planting more trees
Decreases: excessive mining to obtain minerals
Decreases: releasing sewage water into lakes
Maintains: prohibiting fishing during breeding season
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Answer:
Explanation:
PLANTING MORE TREES EXCESSIVE MINING TO OBTAIN MINERALS RELEASING SEWAGE WATER INTO LAKES PROHIBITING FISHING DURING BREEDING SEASON
What animal group lacks true tissues and includes species that are asymmetrical
The animal group which lacks true tissues and includes species that are asymmetrical is referred to as sponges.
What is Sponges?These are invertebrate animals which belong to the phylum porifera and consists of lots of pores.
They don't give equal parts when divided into half and they lack the presence of true tissues.
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The animal group which lacks true tissues and includes species which are asymmetrical is; Sponges.
Which animal group includes species that are asymmetrical?It follows from biology of classifications that the defining characteristic of sponges includes the fact that they lack true tissues and the species are asymmetrical. Hence, the features indicated in the task content are suggestive of sponges.
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How many pressure points are in your arm?- don't answer if you don't want notifications-
Answer:
In acupressure, pressure points are thought to be powerfully sensitive parts of the body. Some people believe that by applying pressure to our body’s pressure points, it can help relieve pain, establish balance, and improve health throughout the body.
Explanation:
A comparison that does not use "like" or " as" is known as ...
hyperbole
onomatopoeia
metaphor
simile
Answer:
Metaphor is the answer.
What are substrates?
A. the products of chemical
reactions
B. a part of the lungs that helps with
oxygen exchange
C. the reactants (ingredients) of
enzyme-catalyzed reactions
why being heterozygous for sickle cell anemia in an area with high malaria rates is most beneficial when compared to homozygous dominant or recessive individuals.
help plssssssss
Answer:
Heterozygous people for sickle cell anemia are more resistant to the debilitating effects of malaria than the normal homozygous people.
