18. How has the use of herbicides affected agricultural productivity?
O A. Fewer crops are organic because of the use of Bt toxin.
B. Fewer pesticides are needed because of parasitoids.
O C. Fewer people are needed to weed because of herbicides.
D. Fewer crops are produced because of herbicides.

Answers

Answer 1

Answer:

B. Fewer pesticides are needed because of parasitoids.

Explanation:

Herbicides are chemicals utilized to manage or command unwanted vegetation. Herbicide employment happens most commonly in row-crop cultivation, where they are employed before or throughout seeding to maximize yield productivity by decreasing other vegetation.  Yields have improved considerably, and, in association with tillage, herbicide use decreases erosion, fuel usage, greenhouse gas discharges, and nutrient run-off, and preserves water.


Related Questions

It was the big day; Lance had been training for months in anticipation of the annual “Dasher Twenty-Six-Two.” As he laced up his sneakers, he thought back to the endless grind of aerobic training he had accomplished. Hour after hour of lung-burning, quad frying jogging on pavement and dirty. He was ready mentally and physically, plus he had a secret weapon ready to go. Lance had been experimenting in the use of a thick, sugar saturated gel-nutrition to supplement his running. He anticipated finishing just before the three-hour mark and he planned to eat his special goo around hour two for a much-needed energy boost. The goo solution was a mixture of maltose, sucrose, and glucose, as well as some salt. Water would be available on the course every few miles and with his nutrition plan set he found his way to the line. *BOOM*

The start gun leaked smoke as wave after wave of runner set off. Miles started flowing by… five miles feeling good… Mile thirteen halfway there! Just as the two-hour mark was upon him, Lance pulled the gel from his pocket and slurped the gooey syrup down. Mile fifteen Phew, heavy legs… Mile eighteen Legs are burning but I got it… then came a hit of fatigue.

He had read about this before. The dreaded bonk. Bonking was said to be the final drips of glycogen being removed from the muscle’s cells, with an accompanying burn suggesting rapid production of lactate. It also meant he had spent the last two hours less aerobic than he thought. Making it to mile twenty-two, Lance noticed his heart rate ten-beats over his planned pace. His breath was getting harsher, his legs getting weaker. The mile twenty-four marker went by and he was down to nearly a walk, lips dry and stomach lurching. The last half mile was a blur as Lance crossed the line his raised arms quickly fell, and so did he, right into a chair near the finish line.

Discuss the necessity of Lance’s training to prepare for his ability to fuel a marathon with specific reference to the major organ systems involved and their purpose. Identify the needed reactants and excreted products Lance utilized during his ongoing respiring, with specific reference to where each is created or used. Finally, predict the influence of his experimental goo and suggest advantages and disadvantages to its use, as well as better use with reference to time and impact on the ability to enter and circulate to where it would be needed

Answers

If someone answers this I will believe in humanity again

why does food get cold but drinks get hot​

Answers

Answer:

it might be because of the room temperature.

Explanation:

since drinks are colder than the room temperature they will get warmer to be the same as the room temperature and because food is hotter than room temperature it gets colder to be the same as the room temperature. dont quote me on that just a guess

PLS HELP!!!
During science class, Sofia drew a picture similar to the one above. Which phrase would appear in the caption box on the right side of the figure?

Group of answer choices

low sound

long wavelength

short wavelength

low frequency

Answers

Answer: low sound

Explanation:


Explain how the stomach Depends on other body systems to carry out its role in breaking down food molecules.

Answers

The whole body works together, as a “team.”If one of the parts of the body won’t work together as a team, everything will get messed up. The stomach muscles churn and mix the food with digestive juices that have acids and enzymes, breaking it into much smaller, digestible pieces. An acidic environment is needed for the digestion that takes place in the stomach.

Which circuit would have the most electrical power?

OA 12A

V0.14 V

oBi22A

0.19 V

O20A

V0.17V

O116A

V025y

025v

Answers

Answer:

the answer is oa 12a

\

Explanation:

Science. Help I really need this giving brainliest to the person with the correct answer, please explain your answer...........

Answers

Answer:

A and B

Explanation:

Select the group of organelles that is common to both plant cells and animal cells.
A.
cell wall, cell membrane, mitochondria
B.
cell membrane, mitochondria, cytoplasm
C.
cytoplasm, mitochondria, cell wall, nucleus
D.
nucleus, cytoplasm, chloroplasts

Answers

It would be B because both plants and animals both have that in their cells

Answer:

B

Explanation:

Both cells have cell membranes, mitochondria ( they both do cellular respiration), and cytoplasm for structure

name two types of silkworms that are fed on mulberry leaves​

Answers

Bombyx Mori L
It’s only one that I’m very sure of I hope this helps

What is RNA primase's job?
-removing a few bases for DNA polymerase
-add a few bases for DNA polymerase
-removing a few bases for helicase

Answers

Answer:

The correct answer is - add a few bases for DNA polymerase

Explanation:

A short extended nucleic acid composed of ssRNA molecule. This is a molecule that synthesize a primer initialy and later again lay down a primer after the opening of replication fork by DNA helicase.

It sysntheisze before and after the helicase and follow the helicase in order to prepare for the replication process. Thus, adding a few bases for DNA polymerase is main job of RNA primase.

Which statement best describes the overall chang
O One cell becomes two cells that have identical
OOne cell becomes two cells that have different
O Two cells become tWo cells that have identical
O Two cells become two cells that have different

Answers

Answer:number one

Explanation:

What is the definition of "earth overshoot day?"

Answers

Answer: Earth Overshoot Day is the calculated illustrative calendar date on which humanity's resource consumption for the year exceeds Earth’s capacity to regenerate those resources that year. The term "overshoot" represents the level by which human population overshoots the sustainable amount of resources on Earth.

What he saiddhdhshshshshdhdjdjdjdjdjd

Fossil fuels, such as oil and natural gas, are primarily formed from the remains of what?
phytoplankton
mammals
bacteria
dinosaurs​

Answers

Answer:

phytoplankton

Explanation:

Answer:

Its phytoplankten.

Explanation:

I hope I spelled it right

explain the process of digestion abd absorption of carbohydrates.​

Answers

Explanation:

the food u eat will goes from oesophagus to ur stomach and then it is mixed by hcl present in your stomach that makes the medium acidic for pesin to digest protein and then bile juice from liver makes the medium alkaline and breaks the larger globules of carbohydrates for enzymes then the food goes goes to small intestine that secretes intestinal juice that converts carbohydrates into glucose

what happens to the chemical bonds during chemical reactions

Answers

During chemical reactions, the bonds that hold molecules together break apart and form new bonds, rearranging atoms into different substances. Each bond requires a distinct amount of energy to either break or form; without this energy, the reaction cannot take place, and the reactants remain as they were. Simplisticly said During chemical reactions, the chemical bonds between atoms are altered.

Evaluate the evolutionary benefits of regulating an internal variable, such as body temperature, versus the cost.

Answers

Answer:

The benefits of being able to regulate the internal body temperature are many and it is considered a beneficial evolutionary character, since in this way the living organism is better maintained in relation to the environment, and it achieves better balance.

Reptiles cannot control their internal temperature, it depends on the external one, that is why to warm their body they need to be in the sun, and to cool down in the shade or in temperate places.

This is a little evolutionary characteristic since the environment is very changeable and the right or ideal temperature for the organism could not be controlled.

Explanation:

Faced with climatic catastrophes or extreme situations, living organisms cannot depend on the great climatic variants, in very cold situations one enters hypothermia and in very hot conditions the proteins are systematically denatured, entering a thermal shock.

Using the data provided, how can we describe the difference between amplitude of an average wave in location B?



Compared to location A, an average wave in location B

A.
has more distance between it and the next wave.

B.
has less energy.

C.
is higher from the bottom to the top of the wave.

D.
has less distance between it and the next wave.

Answers

Answer:

has less distance between it and the next wave

The answer is d has less distance between it and next wave

Which individual's reasoning do you agree with more and why?

Answers

Answer:

Your question doesn't make sense. Who is the individual in question?

Explanation:

The batteries in a flashlight are Dead and the flashlight no longer works. What happened to the energy that was in the battery

Answers

Answer:

See the answer below

Explanation:

When the batteries in a flashlight become dead and the flashlight no longer works, it means that the chemical energy present in the battery has been converted to electrical energy to power the touch and eventually got lost to the environment as heat.

In a typical flashlight that works with batteries, the chemical energy in the batteries is converted to electrical energy, and this powers the bulbs in the flashlight. Gradually, the electrical energy is converted to heat energy and this is lost to the environment by radiation. When all the energy is lost to heat, the batteries are said to be dead and the flashlight stops functioning.

Help me :(( please. It’s due soon

Answers

The answer is C barriers around mating

Answer:

I would guess B or C

Explanation:

I hope this helps

A species of elm has winged-seeds. How would biologists explain how a species of elm with winged-seeds evolved from an ancestral elm species without winged-seeds

Answers

Answer:

In an ancestral elm species, mutations gave rise to the phenotypic trait "winged-seeds". Subsequently, selection favored elm plants with winged-seeds that diverged over time to become a separate species

Explanation:

A mutation is a genetic change in the DNA sequence. In general, mutations have a negative impact on the fitness of the individual (i.e., mutations are generally deleterious) and therefore they disappear from the population. However, there are situations where mutations are beneficial and confer an adaptive advantage, thereby increasing their frequency in the population. In this case, mutations associated with the formation of winged-seeds conferred an adaptive advantage (i.e., higher seed dispersal capacity) to individuals who had this phenotypic trait, thereby these individuals had more chances to reproduce and pass their genes to the next generation. Eventually, Elm plants with winged-seeds accumulated sufficient genetic differences to prevent interbreeding, leading to the formation of a separate species.

explain the process of DNA extraction and gel electrophoresis

Answers

Answer:

The process of that same framework in question is defined below.

Explanation:

The DNA was indeed prepared by mixing with either a dye as well as a radioisotope which enables the gel to have been recognized. The specific filaments would then be differentiated from one another DNA electrophoresis. The procedure occurs with the injection including its completely separate genetic code into boreholes that have already been reduced either at the final moment including its gel pavement.

PLEASE ANSWER.

Purple is dominant to white. A flower with the alleles PP (purple) is
crossed with a flower with alleles pp (white). What is the percent chance
that their offspring (babies) will be purple?

0%
50%
100%

Answers

Answer:

100% P is dominate there for all matches will be Pp this mean it will either be purple or a mixture of both (pink)

Explanation:

the chances will be 100% Purple flowers

Only answer if you know the answer

Answers

Answer:

B. A helicase enzyme unwinds the DNA molecule, then corresponding nucleotides are added to the separated original strand forming two separate semiconservative molecules

Explanation:

DNA Replication is an important phenomenon as far as cell division is concerned. It is the process whereby a DNA molecule doubles its content or forms two DNA molecules from one.

In the semi-conservative model of DNA replication, an enzyme called DNA helicase unwinds the double stranded DNA molecule into two single strands. The single strands are then used as template for DNA polymerase to synthesize another molecule of DNA. Hence, two separate DNA molecules comprising of one old strand and one new strand.

5. The lion researchers in the film have studied 20% of the park and identified 41 lions. (Show your
work/justify your answer for each section.)
a. The entire Gorongosa park is 4,000 km². Approximately how large (in km) is the portion of
the park that has been studied?
ASAP PLSS

Answers

Answer:

800 km²

Explanation:

If the researchers have studied 20% of the 4000 km² park, to find out how much of the park in km they have studied, all you have to do is find 20% of 4000.

4000 x .20 = 800

800 km² is your answer.

If the area of the entire Gorongosa park is 4,000 km². Among which, 20% of the park is already studied, it means 800 [tex]km^2[/tex].

What do you mean by the researcher?

A researcher may be defined as a kind of person who significantly carries out academic or scientific research in order to find some unrevealed data and information.

According to the question,

The total area of Gorongosa park = Gorongosa park is 4,000 km²

The area which is already studied = 20%.

Now, you have to find the area that is already studied in km. So, you have to calculate the 20% of 4,000 km².

The area which is already studied = 4000 × .20 = 800 [tex]km^2[/tex].

Therefore, if the area of the entire Gorongosa park is 4,000 km². Among which, 20% of the park is already studied, it means 800 [tex]km^2[/tex].

To learn more about Researchers, refer to the link:

https://brainly.com/question/28136063

#SPJ2

Plant cells are different from animal cells because they are usually -

Answers

A plant cell contains a large, singular vacuole that is used for storage and maintaining the shape of the cell. Animal cells have many, smaller vacuoles. Plant cells have a cell wall, as well as a cell membrane. Animal cells have a cell membrane, but NO CELL WALL.

Answer:

Plant cells have a large, singular vacuole that is used as a storage and to maintain the shape of the cell.  Even though animal cells have vacuoles, they are smaller.  Plant cells have a cell wall and a cell membrane.  Animal cells only have a cell membrane, and no cell wall.

Explanation:

true or false:

Fish are considered carbon-based organism

Answers

Answer:

Its how you see it.

Explanation:

1.Life on Earth is based on carbon, likely because each carbon atom can form bonds with up to four other atoms simultaneously. This quality makes carbon well-suited to form the long chains of molecules that serve as the basis for life as we know it, such as proteins and DNA.

2.All life on earth can be thought of as "carbon-based." Just be careful about turning this around backwards. It is true that all living things contain carbon compounds... but the opposite is not true. Just because a certain material is referred to as organic does not mean it is or ever was alive.

what is the dakota access pipeline

Answers

Answer: The Dakota Access Pipeline (DAPL) or Bakken pipeline is a 1,172-mile-long underground oil pipeline in the United States. It begins in the oil fields of the Bakken formation in northwest North Dakota and continues through South Dakota and Iowa to an oil terminal near Patoka, Illinois.

Explanation:

What are the metric units for acceleration?

Answers

Answer:

meter per second squared

Complex food molecules that are consumed by organisms must be broken down in order to be used by cells to support growth or release energy.
True
False

Answers

Answer:True

Explanation:

The complex molecules are broken down by the digestive system. If the molecules were not to be broken down they would block the system

Answer:

TRue

Explanation:

Use the graph and the table above to complete the table by estimating the amount of energy transferred near location B.

A.
1600 kilojoules

B.
300 kilojoules

C.
800 kilojoules

D.
400 kilojoules

E.
3200 kilojoules

Answers

The answr is A
Step explain
The answer is A 1600 kilojoules
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