How is the lac operon
regulated?

A. It is regulated by chemical signals.
B. It is regulated by transcription factors.
C. It is regulated by the presence of lactose and the lac
repressor gene.

Answers

Answer 1
I think it’s “A” i’m sorry if it’s wrong
Answer 2
it’s C! hope that helps :)

Related Questions

I don’t need the answer, I just want to know what my teacher is expecting me to do. Am I supposed to say whether it’s multicellular or am I supposed to describe it some other way? If so, then what way?

Thanks, I just need your opinion ^^

Answers

Answer:

I think you have to describe it's features and characteristics and underline or circle the correct option f or unicellular or multicellular

Natural capital includes all of Earth's resources and processes that benefit
humans and other living things. What trend is occurring with Earth's natural
capital?
O A. Earth's natural capital is increasing rapidly as the human
population increases.
B. Ecosystems are replenishing natural capital faster than humans
are using it up.
O C. Humans are using up natural capital faster than it is being
replenished.
O D. Sustainable development is greatly reducing Earth's natural
capital.

Answers

I think B sorry if I’m wrong

Answer:C

Explanation:

just took

In one cubic meter of the ocean, photosynthetic plankton produce 80,000 calories of energy each year. How many calories of energy are available in the bodies of the creatures that eat that plankton?

Select one:

a.
80,000


b.
8,000


c.
800


d.
80

Answers

8000 calories of energy are available in the bodies of the creatures that eat that plankton. Details about calories can be found below.

How to calculate energy available?

In a natural habitat, living organisms feed on one another to derive energy needed for their metabolic activities.

However, only 10% of energy available is transferred to the organism because 90% (most) of the energy is used for the organism's metabolism.

According to this question, in one cubic meter of the ocean, photosynthetic plankton produce 80,000 calories of energy each year.

Therefore, 10/100 × 80,000 calories = 8,000 calories of energy are available in the bodies of the creatures that eat that plankton.

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What do we call the part of a leaf that
protects the leaf opening called the
stomata?
A. guard cell
B. stem
C. vein
D. blade

Answers

Answer:

A.

Explanation:

it should be the guard cell. It is this because, the guard cell is supposed to almost close or move in and out depending on the type of weather or climate.

In an embryo, the formation of many types of tissues and organs occurs as a result of the process of.

Answers

Answer:

Gastrulation leads to the formation of the three germ layers that give rise during further development to the different organs in the animal body. This process is called organogenesis. Organs develop from the germ layers through the process of differentiation.

Which of the following affects the outcome of an experiment?

a
Dependent variable
b
Control
c
Standard
d
Independent variable

Answers

D independent variable

Over several years, a scientist successfully isolates a species of flower for white color. this year, when the new generation of flowers blooms, one yellow flower is found in the population. which is the best reason for the appearance of a new flower color within the species?

Answers

Answer:

genetic mutation

Explanation:

just took the exam

In a process called ____________ , genetic material is exchanged between homologous chromosomes. This occurs during this stage of cell division: ____________ .

Answers

In a process called crossing over, genetic material is exchanged between homologous chromosomes. This occurs during the prophase stage of cell division.

What is crossing over?

Crossing over is the unique process by which genetic material is exchanged between the non-sister chromatids of homologous chromosomes.

Crossing over occurs in the prophase stage of meiosis and ultimately results in the formation of genetic combinations in offspring that are not present in the parents.

Therefore, the process called crossing over, genetic material is exchanged between homologous chromosomes and it occurs during the prophase stage of cell division.

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Help meeeee plssssss

Answers

I would say possibly lungs? Because it’s talking about breathing I think

The sequencing of the human genome led to the realization that chromosome 19 contains many genes while chromosomes 13 and Y contain relatively few. What does this finding imply about the density of genes in a genome

Answers

Answer:the density will increase

Explanation:

What are the 3 layers within this organ?

Answers

Answer:

the epidermis, dermis, and the hypodermis

Explanation:

What is the most basic form of of solar energy
A) passive solar cooling
B) passive solar energy
C) passive solar heating

Answers

Answer:B) passive solar energy

Hope this helps

(brainliest is appreciated!)

The chart below shows some information about two scientists.
Name of
Details about scientist
Views about the solar system
scientist
Nicholaus
Studied Aristotle's theory of homocentric spheres and
Ptolemy's mechanism of epicycles
Suggested that Earth revolved around the
sun in spherical orbits
Copernicus
Johannes Kepler
Studied astronomy and incorporated religious beliefs into Suggested that the orbits of planets were
his works
elliptical
Which of these statements best explains why Copernicus and Kepler had different views about the solar system?
O They came from different cultures.
O They liked to disagree professionally.
O They had different goals and interests.
O They misinterpreted scientific facts and data.

Answers

The best statement that explains why Copernicus and Kepler had different views about the solar system is that they had different goals and interests, which is the third option, as Copernicus and Kepler had different perspectives on the solar system.

Copernicus, a Polish astronomer, was interested in the simplicity and elegance of the universe and sought to find a more accurate model of the solar system. He proposed that the sun, not the earth, was at the center of the solar system, which was a revolutionary idea at the time. On the other hand, Kepler, a German astronomer, was more focused on the mathematical and physical aspects of the solar system and used his observations of the planets to develop the laws of planetary motion.

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In your own words wright a paragraph of the process of the respiratory system. 4-7 sentences

Answers

Answer:

First, you breathe in oxygen through your trachea. The air travels down through the trachea to your lungs. Then your lungs transport the oxygen through your pulmonary artery to your heart. Then the heart transports the oxidized blood throughout your body. Then once the blood gives away all the oxygen your veins take the filtered blood through your pulmonary vein and back to your lungs to get oxidized again. I hope this helps

Explanation:

Can someone help me fill in this chart please?

Answers

Monomer

-Carbs : monosaccharide

-Lipids: glycerol & fatty acids

-Protiens: amino acids

-Nucleic Acid: nucleotide

Polymer

-Carbs: polysaccharide

-Lipids: same as monomer

-Proteins: protein/polypeptide chain

-Nucleic Acid: nucleic acid (DNA)

CHONP

-Carbs: CHO

-Lipids: CHO

-Protiens: CHON

-Nucleic Acid: CHONP

Function/Purpose

- Carbs: body's primary source of energy

-Lipids: energy source (long term), cell membranes, hormones

-Protiens: needed for growth and restoration

-Nucleic Acid: Genetic information storage and protein synthesis

Examples

- Carbs: starches, cellulose

- Lipids: oil, wax, fat

- Protein: muscle, hair, nails, enzymes

- Nucleic Acids: DNA, RNA

What is the function of the acetone used in paper chromatography to separate photosynthetic pigments

Answers

Answer:

It dissolves pigments, allowing them to travel up the paper strip.

2. Check THREE that apply.
What are some differences between plant and animal cells?

Plant cells have chloroplasts.

Plant cells have a stiff cell wall.

Plant cells have a cell membrane.

Plant cells have vacuoles.

Plant cells have chorophyll.

Answers

1 - plant cells have chloroplasts
2 - plant cells have a stiff cell wall
3 - plant cells have chlorophyll

compare light and electron microscope

Answers

See the attached file!!!!

Why is using "illegal marijuana" in a vape form so dangerous? A. The marijuana is likely contaminated
B. The THC level is strongly regulated
C. You're not likely to become addicted
D. It is a safe alternative to tobacco

Answers

I think is c cause you are not going to become addicted .

10)“If Jupiter was not there, there could be more terrestrial planets”. Explain how

Answers

Answer:

There would be minor changes in the planets' orbits about the Sun, but very little else. However, Jupiter does a great job of shepherding and absorbing small objects in the Solar System. With Jupiter gone, the main effect on Earth would be an increase in the rate of impacts from asteroids and other space flotsam.

Explanation:

Hope this helped!!

In the cells of most organisms, DNA is contained in the

a
cell wall
b
nucleus
c
ribosomes
d
lysosomes

Answers

Answer:

B. Nucleus

Explanation:

DNA, or deoxyribonucleic acid, is the hereditary material in humans and almost all other organisms. Nearly every cell in a person’s body has the same DNA. Most DNA is located in the cell nucleus (where it is called nuclear DNA), but a small amount of DNA can also be found in the mitochondria (where it is called mitochondrial DNA or mtDNA). Mitochondria are structures within cells that convert the energy from food into a form that cells can use.

The information in DNA is stored as a code made up of four chemical bases: adenine (A), guanine (G), cytosine (C), and thymine (T). Human DNA consists of about 3 billion bases, and more than 99 percent of those bases are the same in all people

4. Explain how fusion is one of our sources of energy.

Answers

Answer:

La energía de fusión es la fuente de energía del sol y las estrella, la fusión es un proceso que ocurre dentro del sol, por esta razón la luz que vemos y el calor son el resultado de una reacción de fusión.

chromosomes from blood drawn from a five-day-old baby appears to have slight facial deformities and has been diagnosed with an atrial heart defect

Answers

Answer:

A congenital heart defect (CHD) is a heart problem that a baby has at birth. It is caused by abnormal formation of the heart during growth in the womb. In most cases, when a baby is born with a congenital heart defect, there is no known reason for it. Some types of congenital heart defects can be linked to an abnormality in the number of a baby’s chromosomes. They may be linked to single gene defects. Or they may be linked to environmental factors. In most cases, there is no clear cause that can be found for the heart defect. They are often thought to be caused by many factors. The factors are usually both genes and the environment. This means that genes from both parents plus unknown environmental factors lead to the problem.

Explanation:

i think that the person who answered above me was right

8. food gives the body energy, which helps the body maintain homeostasis. in the
morning, an athlete eats a nutritious breakfast to get energy to exercise. what are the
main organ systems involved in the process of food from the athlete's breakfast being
broken down into nutrients and then delivered to the cells?
a. digestive and excretory systems.
b. digestive and circulatory systems.
c. nervous and excretory systems.
d. respiratory and circulatory systems.

Answers

a. digestive and excretory systems.

Given the DNA strand below, what mRNA strand would it produce?
T-T-A-C-G-G-C-T-A-A-C-T

Answers

the mRNA strand would be
A-A-U-G-C-C-G-A-U-U-G-A
remember the T gets replaced with U when creating the mRNA strand.
A goes with T (or U in mRNA circumstances) (apple on tree)
G goes with C (car in garage)

Cells in the body use oxygen for cellular respiration. Select the two sentences that correctly describe cellular respiration.
ATP is produced.
ATP is consumed.
Carbon dioxide is absorbed.
Carbon dioxide is released.

Answers

Answer:

ATP is produced

Carbon dioxide is released

The two sentences that correctly describe the process of cellular respiration are as follows:

ATP is produced.Carbon dioxide is released.

Thus, the correct options for this question are A and D.

What is Cellular respiration?

Cellular respiration may be defined as a biological process through which a form of sugar which is known as Glucose is transferred into energy in the form of ATP in the presence of oxygen. This energy is required to accomplish metabolic activities.

The complete reaction of cellular respiration is as follows:

Glucose + Oxygen → Carbon dioxide + Water + Energy (ATP).

With the help of the reaction, it can be determined that glucose and oxygen are utilized while carbon dioxide and energy in the form of ATP are produced as products.

Therefore, ATP is produced and Carbon dioxide is released are the two sentences that correctly describe the process of cellular respiration. Thus, the correct options for this question are A and D.

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A biologist who uses the knowledge of the lifecycle of insects establish the time of death

Answers

Forensic entomologists are criminal justice and science experts who use their knowledge of how insects aid in bodily decomposition to determine the time and cause of death.

What is entomologists?

Entomologists are biological scientists which are specialized in the field and laboratory insects study.

Most entomologists specialize in one or more insect species or groups, such as bees, butterflies, beetles, or ants.

Forensic entomologists are criminal justice and science experts who use their knowledge of involvement of insects in decomposition to determine the time and cause of death.  

Thus, the answer is forensic entomologists.

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which of the following organelles are found in plant cells but not animal cells

Answers

Answer:

The plant cells have cell wall, plastids, chloroplasts. These organelles are NOT present in animal cells.

Which prey would be unique to the short-eared owl of Cuba?

Answers

Answer:

A

Explanation:

Gull bones are long and those would be prey based on what other answers are saying

Multicellular fungi have a _

Answers

Answer:

Multicellular fungi reproduce by making spores. Mold is a multicellular fungus. It consists of filaments called hyphae that can bunch together into structures called mycelia. Several mycelia grouped together are a mycelium and these structures form the thallus or body of the mold.

Explanation:

hope it's helps^^

Answer:

The vast majority of fungi are multicellular. Most of the body of a fungi is made from a network of long, thin filaments called 'hyphae'. Hyphae filaments are made from tubular cells that connect end on end. Each cell is surrounded by a cell wall composed of a compound called 'chitin'.

Explanation:

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What are the central ideas of this excerpt? select two options. antony wants everyone to know that he wanted caesar dead. antony does not believe that caesar deserves a funeral, but unwillingly agreed to speak to please the conspirators. the mistakes men make are remembered after their deaths, but their good deeds more often die with them. if caesar was power-hungry, it was a serious flaw, and he paid seriously for it. antony believes the conspirators should be rewarded with riches for their sacrifice and willingness to kill the ambitious caesar. What is the answer to 0.6-0.17 here is another one for you all x + y = 20 and 2x + y =25 how can i solve this equation Find the surface area of each polyhedron. Explain your reasoning clearly. Why did Gorbachevs reforms cause economic turmoil in the Soviet Union? Why are humans biologically capable of socialization? Which of the following summarizes cellular respiration? Oxygen reacts with glucose to produce carbon dioxide and water, and release energy.Light energy is changed into chemical energy. Light energy is used to join water and carbon dioxide to make oxygen and glucose. Chemical energy is changed into light energy. 5b2 square value of b is 4 Britain treated its sailors badly during the war with France. How might better treatment have prevented the practice of impressment? Congress passes the Embargo Act in 1807 to prevent trade with Britain. What unintended consequences did the Act have for the US economy? How did Tecumseh respond to the problem of white settlement in Native American land? Do some research and find out about ONE Native American group that was treated poorly during this time and explain what happened to them. Which statement is correct?A. 3 A(n) ___ provides abstract methods and no other code. a. abstract class b. interface c. polymorphic class d. base class pls answer I will mark brainliest x 10xy) + 16x19 +11z +2 (-2-z) Commodore Matthew perry forced the Japanese to 1Compare Handel to Monteverdi. What was different about these two composers?OA. Handel wrote madrigals; Monteverdi did not.OB.Handel composed operas; Monteverdi did not..Handel was a transitional figure from Renaissance to Baroque; Monteverdi was not.OD.Handel influenced the Royal Academy of Music; Monteverdi did not. What dynasty came after China's Five Dynasties and Ten Kingdoms? The center is a typical value. It is the _______________ value of a dot plot. What environment will produce the largest crystal sizes?Construct a short Essay (Make sure you include information about Temp, Pressure, amount of dissolved solids, & cooling time)Is there support for your Claim? 2) Frank's Auto Zone charges $125 for parts and $75 per hour for labor.Gracie's Engine Works charges a flat fee of $425 for the same job. Afthow many hours would the companies charge the same amount?Mark only one oval.A) 2 hoursB) 3 hoursC) 4 hoursD) 5 hours