A farmer uses triazine herbicide to control pigweed in his field. For the first few years, the triazine works well and almost all the pigweed dies; but after several years, the farmer sees more and more pigweed. Which of these explanations BEST describes this observation?
a. The herbicide company lost its formula and started selling poor-quality herbicide.
b. Natural selection caused pigweed to mutate, creating a new triazine-resistant species
c. Triazine-resistant pigweed is more efficient at photosynthesis.
d. More triazine-resistant individuals survived each year, soi more individuals were triazine-resistant.
e. Some individuals acquired triazine resistance during their lifetimes, and were able to pass it on to offspring

Answers

Answer 1

Answer:

e. Some individuals acquired triazine resistance during their lifetimes, and were able to pass it on to offspring

Explanation:

The term resistance in the exposed example refers to an inheritable change in the weed population sensitivity, which is reflected in the consecutive failure of the chemical effects on the herb population.  

Herbicide might produce a genetic modification in the weed, leading individuals to survive under the effects of the chemical. The plants evolve with the capability of tolerating the chemical dose that is usually used to destroy a normal population of plagues.  

Resistance to the toxic is associated with mutations in some of the genes.

A mutation is a change in DNI sequences that introduce new variants. Many of these are eliminated, but some of them might succeed and be incorporated into each individual. These mutations are the ones that have been selected by natural selection.  

The selective pressure or modeling environmental factor is the triazine herbicide The weed´s response to herbicide is the survival of only those that carry mutations.  Natural selection benefits these mutations.  The mutated herbs survive, become more resistant, and pass the mutation to their offspring.


Related Questions

can the enzyme DNA polymerase be used to break down or build lactose?

Answers

Yes it could because if you look it up it will tell you that it is used to break down .

Match each root with its meaning.

Match Term Definition
Port A) To build, form
Voc B) To pull
Tract C) To be empty
Vac D) To carry
Struct E) Voice; to call

Answers

Voice;Voc, struct; to build, vac; to pull, tract; to carry, port; to be empty

The main function of this process is to

Answers

Answer:

what process? is there more to the question

Explanation:

When 2 or more organisms compete for the same resource there can be a variety of outcomes. What would be one of those outcomes?

Answers

Answer:

The biology branch deals with the relations between and physical environment of organisms.

Explanation:

The principle of competitive exclusion states that if two species occupy the same niche, they cannot exist together (competing for identical resources). Two species whose niche overlap can evolve to have different niches through natural selection, resulting in the distribution of resources.

In ecology, interspecific competition is a form of competition where individuals from different kinds compete in an ecosystem for the same resources (e.g. food or space)... There may be interspecific competition if people of two separate species share a limited resource within a single area.

Help please
Mangrove trees can only survive in moderately saline water. What are such organisms called?
A. Euryhaline
B. Stenohaline
C. Mesohaline
D. Polyhaline
E. Oligohaline

Answers

Answer:

I believe the answer is Euryhaline

Scott made a model of the water cycle by filling a tub with water, covering the tub with clear plastic, and placing a heat lamp over the tub. After a few days, he observed water droplets collecting on the plastic wrap. What process formed the water droplets in Scott's model?

Answers

Answer:

The correct answer is - condensation.

Explanation:

When humid air comes in contact with the cold surface and we get the water in form of droplets, it is called condensation. In other words, condensation is the change of water vapor to the water exactly opposite of the evaporation process.

In the given experiment of Scott where droplets are collected on the plastic surface which simply illustrates the phenomenon of condensation as the water evaporated due to the heat of the lamp and condensed on the surface of plastic wrap.

Answer:

C

Explanation:

condensation

3 times the sum of 2 and y?"

Answers

Answer and Explanation:

3(2 + y) is the answer.

The 3 is multiplying the 2 and y inside the parenthesis.

#teamtrees #PAW (Plant and Water)

In general, how does biodiversity vary across the biosphere?

Answers

The latitude and longitude spatial variation of temperature affects climates and then the distribution of biodiversity.

Which of the following areas of study is pursued by pomologists?

study of plant colors

study of fruits and nuts

study of grape cultivation

study of floral design

Answers

Pomology (from Latin pomum, “fruit,” + -logy) is a branch of botany that studies fruit and its cultivation. ... The goals of fruit tree improvement include enhancement of fruit quality, regulation of production periods, and reduction of production cost. One involved in the science of pomology is called a pomologist.

What are the four
characteristics that identify something as living?

Answers

Properties of Life. All living organisms share several key characteristics or functions: order, sensitivity or response to the environment, reproduction, growth and development, regulation, homeostasis, and energy processing. When viewed together, these characteristics serve to define life.

larva stage of insect miving in mass is called​

Answers

I think called nymphs.

Which product forms from the reaction between nitrogen (N)
(CI)?
A. NCI
B. NCI
C. N2CI
O D. N2C1

Answers

Answer:

None of the above

Explanation:

Because as N has the valence of 3 when it reacts with Cl of 1 as valence they will form NCl3

Answer:

The product of the reaction between nitrogen (N) and (CL) is nitrogen trichloride (NCl3)

Explanation:

Although by seeing the question's answer choices, I think it was an error to detect the question (image) by Brainly as 2 of the answers is written the same.

However, when nitrogen gas reacts with chlorine gas, the product is gaseous nitrogen trichloride (NCL3), I guess 1 of your answer must be NCL3.

50 points were put in, and brainliest will be awarded. In a real garden, which hormones would stimulate seed germination and plant growth? How do these feedback mechanisms maintain homeostasis in plants?

Answers

Hdhhdbfbfbbdhrhdhejjrie

Sequence the steps in the chain of infection in the correct order. identify influenza, new patient comes in contact with sick patient, influenza struck (sick) patient, sick patient sneezes, new patient is infected, new patient inhales through the nose

Answers

Answer:

influenza struck (sick) patient

new patient comes into contact with sick patient.

sick patient sneezes

new patient inhales through nose

new patient is infected

Explanation:

Answer: influenza struck (sick) patient

new patient comes into contact with sick patient.

sick patient sneezes

new patient inhales through nose

new patient is infected

Help will mark brainliest #7,8

Answers

The answers for the question are given below
7.B
8.D

Answer:

7. D

8. D

Explanation:

7. One of the most important functions of iron is the transportation of oxygen to the blood. Iron’s main purpose is to carry oxygen in the hemoglobin of red blood cells throughout your body so your cells can produce energy.

8. A network of tiny capillaries connects the arteries and veins. Though tiny, the capillaries are one of the most important parts of the circulatory system because it’s through them that nutrients and oxygen are delivered to the cells.

PLEASE HELP!!! WIL GIVE BRAINLIEST
The following leaf, with edges that appear burnt, was observed on an impatiens plant.

Which mineral is this impatiens likely deficient in?
a. phosphorus
B calcium
C potassium
D sulphur

Answers

I have no ideas but maybe it is B?

Which of the following best describes bear hibernation?

a. It causes hormonal imbalance and cellular communication failure.
b. It is a disruption between circadian rhythms and environmental cues.
c. It is a physiological condition resulting from north-south and south-north travel.
d. It is a psychological phenomenon that affects people traveling between time zones.

Answers

Answer:

the answer is C

Explanation:

What could a human living now and a horse living thousands of years ago
have in common?
A. They need the same amount of energy to survive.
ООО
B. They have the exact same DNA
C. They are made of some of the same matter.
D. They both get their energy directly from the sun

Answers

Answer:

they both get their energy directly from the sun

DNA is composed of peating structural units
called
is the five-carbon sugar found in
DNA.
DONE

Answers

Answer:

Explanation:

if u mean repeating structural units of the DNA they are nucelotides or nucleotide bases.

and Yes, there is a five-carbon sugar in the DNA. It's called deoxyribose.

Yea dna is composed of pearling structure units called carbon sugar

Mrs. Blakely's chemistry class is acting out chemical reactions on a dance
floor. The whole class gets on the dance floor and moves around like
molecules of air in a beaker. What could the students do to model a condition
that would decrease the rate of the reaction?
A. Have the people on the dance floor choose a partner.
B. Have more people get on the dance floor.
C. Have some people get off the dance floor.
D. Have the people on the dance floor move faster.

Answers

Answer:

it's either C or D

The students simulate a situation that might cause the reaction rate to decrease, such as having some people leave the dance floor while others move more quickly. So, the correct options are C and D.

What is Reaction rate?

The pace at which a chemical reaction occurs is known as the rate of the reaction. It is proportional to the rise in product concentration per unit time and the fall in reactant concentration per unit time. Response times can differ wildly.

For instance, because it happens quickly, wood burning has a fast reaction rate, whereas iron rusting has a low rate of the reaction because it happens gradually.

For the aforementioned illustration, the students act out a scenario that can result in a slower reaction time, such as having some participants leave the dance floor whereas others move more swiftly.

Therefore, the correct options are C and D.

Learn more about Rate of reaction, here:

https://brainly.com/question/30546888

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How many inherited traits are considered in a dihybrid cross?
a.)2
b. )1
c.)3
d.)4​

Answers

A dihybrid cross allows us to look at the pattern of inheritance of two different traits at the same time.

Despite the diversity of nature, most organisms contain the same 4 DNA bases.
What are those bases? *
Adenine, thymine, cytosine, uracil
Adenine, thymine, cytosine, guanine
Adenine, thymine, cytosine, lysine
Adenine, uracil, cytosine, valine

Answers

Answer:

Adenine, thymine, cytosine, guanine

Explanation:

some things use uracil instead of guanine but its less common. also to remember which ones pair up, remember Apple in the Tree (Adenine pairs with Thymine), and Car in the Garage (Cytosine pairs with Guanine).

what is substances in scientific methods​

Answers

Answer:

A chemical substance is a form of matter having constant chemical composition and characteristic properties. Some references add that chemical substance cannot be separated into its constituent elements by physical separation methods, i.e., without breaking chemical bonds.

A mouse had a gene sequence of GTT coding for leucine, an amino acid. mutation in this gene led to the formation of GTG. However, the amino acid formed was leucine, despite the mutation. This is a mutation for the mouse

Answers

Answer:

1- substitution.

2- neutral.

Explanation:

The change in the genetic sequence of the organisms known as mutation. Mutations might be sudden and heritable in nature. spontaneous mutation and induced mutation are types of mutation.

A change that causes a change in single base pair of a gene sequence is called substitution mutation. The original leucine sequence is GTT and the mutated sequence is GTG. Thus T has been substituted by G.

Mutation can be beneficial, detrimental or neutral. The neutral mutation is that does not affect the physical change. Both GTT and GTG code for the same amino acid so it would be neutral.

Answer:

1- substitution.

2- neutral.

Explanation:

The change in the genetic sequence of the organisms known as mutation. Mutations might be sudden and heritable in nature. spontaneous mutation and induced mutation are types of mutation.

A change that causes a change in single base pair of a gene sequence is called substitution mutation. The original leucine sequence is GTT and the mutated sequence is GTG. Thus T has been substituted by G.

Mutation can be beneficial, detrimental or neutral. The neutral mutation is that does not affect the physical change. Both GTT and GTG code for the same amino acid so it would be neutral.

Ella repeated Mendel's second set of experiments. She crossed two non-pure
tall pea plants and produced eight offspring. All of the offspring were tall. She
concluded that her experiment must be flawed.
What is wrong with Ella's reasoning?
A. Ella did not perform enough trials to evaluate the pattern in the
results.
O B. Ella did her experiment correctly. Mendel's experiments must have
been flawed.
C. Ella should have crossed two pure-breeding tall plants.
O
D. Ella did not accurately measure the height of the plants.

Answers

Answer:

A

Explanation:

Ella did not preform enough trials to evaluate the pattern in the results.

What makes up the "head" region of a phospholipid? __________Is it hydrophobic or hydrophilic?_________

Answers

Answer:

Phospholipids consist of a glycerol molecule, two fatty acids, and a phosphate group that is modified by an alcohol. The phosphate group is the negatively-charged polar head, which is hydrophilic. The fatty acid chains are the uncharged, nonpolar tails, which are hydrophobic.

When the stimulus voltage is increased, _______. When the stimulus voltage is increased, _______. sodium permeability into the cell decreases sodium permeability into the cell increases to overcome the potassium exiting a greater-than-threshold depolarization results a greater-than-threshold depolarization results and sodium permeability into the cell increases to overcome the potassium exiting.

Answers

Answer:

a greater-than-threshold depolarization results and sodium permeability into the cell increases to overcome the potassium exiting.

Explanation:

The occurrence of action potential requires the existence of active voltage-dependent channels to open and close in response to the membrane depolarization.  

When depolarization reaches and supers the threshold point, voltage-dependent Na+ channels open and the ion gets into the cell. The entrance of Na+ decreases the electric charge difference between the cellular interior and exterior. Membrane depolarizes and produces the action potential that tends to reach a potential equilibrium for Na+ = +60mV. The higher the Na+ input is, the greater is the depolarization and the greater is the Na+ permeability.

Once Na+ channels are closed, voltage-dependent K+ channels open, increasing the membrane permeability to the ion, letting K+ get out of the cell, following the electrochemical gradient.  

The closure of Na+ channels and opening of K+ channels are responsible for membrane repolarization.

The carrying capacity for a population of frogs in a rainforest ecosystem is 840 frogs, and the maximum rate of increase for this population is 1.0 per individual per year. Using the logistic population growth model, what is the approximate population growth rate for 212 frogs?

4 frogs per year
29 frogs per year
158 frogs per year
314 frogs per year

Answers

Answer:

4 frogs per year is the answer

In logistic growth, a population's per capita growth rate gets smaller and smaller as population size approaches a maximum imposed by limited resources in the environment, known as the carrying capacity (K).

Formula used:  dN/dT= rN{1-N/K}

Given: k= 840 frogs

            N= 212, r= 1 year

To find: r=?

Solution:

putting value in equation:

                          dN/dT= rN{1-N/K}

                          dN/dT = 1 x 212 {1-212/840}

                   so,    dN/dT= 158.57 ( approx)

                   

Final answer: The correct option is (c)

158 frogs per year

Thus, we can conclude that 158 frogs per year will be the population of frogs.

You can learn more about logistic growth here:

https://brainly.com/question/2495595

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Complete the following sentence.
A qualified landscape architect will usually hold a college degree, may hold an advanced degree, and will often hold a ________ bestowed by a state board.

Answers

Answer:

bachelor's degree : ) it says my answer needs to be longer for some reason so here you go I guess lol

In the early days of the solar system, many planetesimals orbited the Sun. The theory has it that one large planetesimal the size of Mars struck a glancing blow to the molten Earth. How did this event contribute to the formation of the Moon?

Answers

Answer:

This event led to the breaking away of a part of earth and the part was held on by earth’s gravity and this part became the moon.

Explanation:

The formation of moon was after the formation of the earth. In the initial years of the formation of earth it was affected by several asteroid hits and comets. Small planets referred to as planetesimals  also kept continuously affecting the earth. Before 4.5 billion years ago a planetesimal which was about the size of Mars hit earth.

This hit led to the breaking away of a part of earth. The part which was sent to space by the hit was caught by the gravity of the earth and the part started orbiting around the earth. The similarity of the rocks in moon to that of earth is attributed to the fact that moon was actually formed from earth.

The moon and earth keeps influencing each other. The moon’s effect reduced the speed of earth’s rotation and the moon keeps moving away from the earth due to the influence of earth.

Answer:Molten rock broke off from Earth following the impact. The rock coalesced (gathered) into a ball, which formed the Moon.

Explanation: Edmentum

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