From 1980 and 1990 the insects were sprayed with an insecticide that caused the population to decrease. From 1990 to 2000 the insects were sprayed with the same insecticide, but the population increased. What most likely caused the population to increase? A) The insects were affected by the insecticide causing the population to increase.
B) Due to genetic variation, the insect population adapted to the insecticide.
C)The concentration of insecticide was too great, and therefore biodiversity was reduced.
Answer:
it's b
Explanation:
they got used to it all the ones that couldnt handle it died in the generation before
In towns and cities, generally, the bore wells have to be dug very deep to get water as compared to bore wells dug in villages. Give suitable reasons.
Answer:
nice English and I'm good morning
Can u help me
I need
Answer:
the first one would be DNA replication.
the second one would be Segregation
the third is Cytokinesis
and the last should be Binary Fission
1) Water is one of the required reactants for photosynthesis. It provides electrons that are energized by sunlight and used to make energy carriers like ATP. Where do plants get the water they need for
photosynthesis?
Answer: Plants get water from the soil their roots are embedded in.
Explanation: Photosynthesis can be defined as the process by which the the autotrophs make food with the help of carbon dioxide and water.Water provides electrons,these electrons are energized by sunlight and used to make ATP.The plants get water from the soil. The water in the soil is absorbed by the roots of the plant that is transported to the leaves for photosynthesis.hence, the answer is soil.
Six most common elements in the human body
Explanation:
carbon, hydrogen, nitrogen, oxygen, sulphur and phosphorus
Answer:
Almost 99% of the mass of the human body is made up of six elements: oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorus. Only about 0.85% is composed of another five elements: potassium, sulfur, sodium, chlorine, and magnesium.
Explanation:
Analyze why it is more difficult for biologists to understand the diversity in prokaryotes as compared to plants or animals.
Answer:
The diversity in prokaryotes exists on the cellular level and is not visible to the n*ked eye.
Which of the following statements best explains the pattern seen on the gel with regard to the size and charge of the molecules? Circle all that are correct.
Molecules A and B are positively charged, and molecule A is smaller than molecule B.
Molecules A and B are negatively charged, and molecule A is smaller than molecule B.
Molecules C and D are positively charged, and molecule C is larger than Molecule D.
Molecules C and D are negatively charged, and molecule C is smaller than Molecule D.
The following statement best explain the pattern of seen on the gel electrophoresis.
Molecules A and B are positively charged, and molecule A is smaller than moleculeWhat is gel electrophoresis?Gel electrophoresis is a laboratory technique that is used to separate combinations of DNA, RNA, or proteins base on their molecular size. In gel electrophoresis, the molecules to be separated are put and push forward by an electrical field through gel that that have small pores.
Therefore, The following statement best explain the pattern of seen on the gel electrophoresis.
Molecules A and B are positively charged, and molecule A is smaller than molecule.Learn more about gel electrophoresis here.
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the genetic makeup of a species is called-
the genetic variation that exists between a species is called-
the diversity of ecosystems, communities, and habitats is known as-
Answer:
i put makeup of my dog and on my cow i love to jump over the sun for joy
Explanation:
According to the phylogeny, which protists are in the same eukaryotic supergroup as plants?.
Answer:
Green algae and Red algae.
Explanation:
Answer:
Red algae and green algae are included in the supergroup Archaeplastida. It was from a common ancestor of these protists that the land plants evolved, since their closest relatives are found in this group. What is a protist as in the protist kingdom?
Explanation:
Keep in mind what an independent variable is. What are some variables that can affect a person’s heart rate? Choose one variable that you would like to design an experiment for. State your hypothesis of how the independent variable might affect heart rate. Please be specific about what the independent variable is.
Here the experiment is on heart rate of a person
Controlled Variable:
TimeExplanation:
Both shall workout for the same time.Measure their heart rate and see who's heart rate is higher.Independent Variable:
AgeExplanation:
Age is different for everyone and independent.Make them workout for the similar amount of time then measure their heart rate.Older person will have greater heart rate.=================================================================
The person with less heartbeat means he has a great fitness.The person with greater heartbeat means he has a bad fitness.
What is one possible result of a mutation within a start codon? A stop codon?
The result of a mutation within a start codon is the non-start of the protein translation, whereas a mutation in the stop codon will long the length of the protein.
What are transcription and translation?Transcription refers to the process by which a fragment of DNA is used as a template to create an RNA molecule, usually a messenger RNA.
Subsequently, this mRNA sequence can be used to create a protein by a process called translation.
The triplets of nucleotides (codons) in the mRNA are read by the ribosomes during translation, thereby a mutation in the start codon would produce a nonfunctional mRNA.
Moreover, a mutation in the stop codon will long the length of the resulting protein sequence.
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Which of the following is needed for your immune system to create an appropriate antibody to protect against a particular disease?
A
an existing antibody
B
the antigen of a particular pathogen
C
pathogen cytoplasm
D
DNA from the pathogen
Answer:
d.
Explanation:
You need a small dose of the disease so your body can fight it and become immune.
Answer:
D
Explanation:
If a substitution of one nitrogen base for another nitrogen base occurs in this change has no effect on amino acid being called for this would be known as a
Answer:
Point mutation
Explanation:
Since it does not alter the amino acid, it would be a point mutation (unless if it did change the amino acid, it would be a frameshift mutation).
During translation, the peptide bond formation is catalyzed by:.
Answer:
RNA (referred to as a ribozyme)
Explanation:
Since different species of penguin may occupy the same habitat, explain why they may continue to remain separate species.
Answer:
Some penguins may live in the same location that doesn't mean they have to be the same species of a penguin. They may not be attracted to other species that live there.
Explanation:
same as above
Which statements about eclipses are true? check all that apply.
A total lunar eclipse has a reddish colour, The moon moves between Earth and the Sun during a solar eclipse, and A lunar eclipse occurs during a full moon.
How was the eclipse discovered?Scientists have examined eclipses since age-old times. Aristotle observed that the Earth's shadow has a circular form as it moves across the moon. He declared that this must mean the Earth was round.
Thus, the above-mentioned statements about the eclipses are true.
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Please help IT WOULD MEAN THE ENTIRE WORLD!!!
Answer:
-if I'm not wrong the technique is used to produce the bacteria cell is DNA cloning because after a ligation, the next step is to transfer the DNA into bacteria in a process called transformation.
-The organic compounds scientist used to cut DNA is enzymes.
-the possible result would be the transformations made and selection of the bacteria.
Which of the following is a characteristic of all mammals? Question 4 options: lungs hair tail both 1 and 2.
Answer: both 1 and 2
Explanation: common sense
Both 1 and 2 are a characteristic of all mammals.
What are the characteristics of mammals?Characteristics of Mammals are:
The presence of hair or fur.Sweat glands.Glands are specialized to produce milk, known as mammary glands.Three middle ear bones.Specialized teeth.A four-chambered heartThus, Both 1 and 2 are a characteristic of all mammals.
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Answer questions at top for 40ps
When neither of two alleles is dominant, the resulting trait reflects the influence of both. This is called
dominant inheritance.
codominance.
polygenic inheritance.
This is called codominance
Which cell wall is the furthest form the plasma membrane in plants
Answer:
Below
Explanation:
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Outermost layer of the cell wall is
(A)Plasmalemma
(B)Secondary wall
(C)Middle lamella
(D)Primary wall
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Hint: The wall which is present at the outermost of the cell wall acts as a glue between the different cells. . The secondary wall is not present in every cell, it is present in few cells that alter the growth of the primary wall.
Complete answer:
A cell wall is an outer structural layer present in only some types of cells, just outside the cell membrane. It is usually tough, flexible, and sometimes rigid. The cell wall is mostly composed of two layers and sometimes three layers too. The layers of the Cell wall are as follows-
- The primary cell wall is generally a flexible thin, and an extensible layer formed while the cell is growing i.e not fully developed. It is usually made up of cellulose and it is often permeable too.
-The middle lamella, a layer rich in pectins. It is the outermost layer that forms the interface between adjacent plant cells and glues them together.
-The secondary cell wall, if present, is a thick layer formed inside the primary cell wall after the cell is mature. it's not found in all cell types.
Additional Information: The cell wall is majorly composed of the cellulose microfibrils that are linked via hemicellulosic tethers to form the cellulose-hemicellulose network, which is embedded in the pectin matrix. The most common hemicellulose present in the primary cell wall is xyloglucan.
The outer part of the primary cell wall of the plant epidermis is mostly covered with the cutin and wax, forming a permeability barrier known as the plant cuticle.
Secondary cell walls contain a wide range of additional compounds that helps to enhance and modify their mechanical properties and permeability. The major polymers that make up wood (largely secondary cell walls) include cellulose, 35-50% .xylan, 20-35%, a type of hemicellulose, and lignin, 10-25%.
The cell wall which is the farthest from the plasma membrane in plants is the primary cell wall.
What do you mean by Cell wall?A Cell wall may be defined as a specialized form of the extracellular matrix that surrounds every cell of a plant. It is made up of cellulose.
The primary cell wall is the outermost cell wall in the plants, while the secondary cell wall is the innermost cell wall in the plant cell.
The secondary cell wall is located near the plasma membrane, while the primary cell wall is located farthest from the plasma membrane.
Therefore, the cell wall which is the farthest from the plasma membrane in plants is the primary cell wall.
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This time period allowed for great advancements in technology and human health but it also led to many environmental problems. 5c
Group of answer choices
agricultural revolution
american revolution
industrial revolution
paleolithic era
Answer:
C. Industrial Revolution
Explanation:
Took the test ;)
Also, the new machines in the industrial revolution helped human health and of course, advanced technology but the machines and the mining harmed the environment.
Question 1
the biological classification of organisms is called taxonomy. based on your own investigation, discuss
the importance of taxonomy in biological research.
Answer:
It helps to ascertain the number of living beings on earth.
Explanation:
More than one million of species of plants and animals have been discovered and classified so far. It aims to classify the living organisms. Millions of organisms are classified scientifically in categories, which helps to have a better understanding.
Compare aerobic and anaerobic respiration. Which produces more energy (ATP?) Why?
Answer:
Aerobic respiration is far more energy-efficient than anaerobic respiration. Aerobic processes produce up to 38 ATP per glucose. Anaerobic processes yield only 2 ATP per glucose
Sun-->sagebrush-->jackrabbits-->coyotes
What would happen to this ecosystem if the amount of coyotes increased? plsss tell me
Answer:
there would be less jackrabbits, more sagebrus, and the coyotes would have less food leading them to death
Explanation:
what i said
If a cell becomes freely permeable to sodium ions (na ) and is not regulated, what will be the resulting membrane potential?
Since their are more sodium ions outside the cell at test, if a cell becomes freely permeable to sodium ions and is not regulated, the membrane potential will be positive.
What is membrane potential?The membrane potential is the potential difference across a neuronal membrane due to the difference in the concentration gradient of oppositely charged ions.
At rest, the inside of the membrane is negative while outside is positive due to more sodium ions being outside the cell.
Therefore, if a cell becomes freely permeable to sodium ions and is not regulated, the membrane potential will be positive.
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write the difference between
a.Soil formation and Soil erosion
b.Soil pollution and Soil profile
a.
In soil erosion, the soil is carried away from by the wind or water from the top layer of the ground. Soil formation is making soil. It can be by the deposition of the soil from water or wind
If an herbicide were to selectively inhibit development of antheridia in a moss colony, what would be the consequence?
The most likely consequence of a herbicide that selectively inhibits the development of antheridia would be the reproduction of female plants only.
Whta are antheridia?The antheridia are haploid reproductive structures that produce male gametes in some types of plants.
The antheridia can generate a special type of biflagellate sperm (male gametes) required during se_xual reproduction.
Conversely, archegonia is a structure that produces a single egg, i.e., the ovum or female gamete.
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Why is the coral snake venomous?
Answer:
Coral snake bites can be extremely painful and can cause muscular paralysis. The coral snake's venom is one of the most potent venoms in the animal world because it contains powerful neurotoxins. The neurotoxins are responsible for the rapid paralysis and respiratory failure in the coral snake's smaller prey.
Explanation:
Choose one specific natural resource in your region. Describe what it is used for, how it is harvested, what attempts have been made to manage it in a sustainable way, and how social, economic, and environmental needs may come into conflict. Evaluate how effective the attempts of natural resource management have been.
Answer:
Rainwater is very important in my area, we use it for crops, animals and for everyday essentials. It's collected in jars and kept stored, it can be filter then boiled to extract any bacteria. Then I usually sit it outside in the sun to grab the suns energy. This saves me a lot of money on utilities like my water bill for example. It's safe for everyone and poses no threat to the environment.
Explanation:
This is a natural alternative for anyone who loves nature and alkaline water
Answer:
Blue crab is an important resource in my region. It is harvested in Chesapeake Bay. People in my region have been eating blue crabs for hundreds of years. Blue crabs are usually harvested in traps called crab pots. Most crabs are harvested commercially, but recreational crabbing is also important. Crab harvesting in Chesapeake Bay is regulated by the states of Maryland and Virginia, and special licenses are required. Limits are placed on the number of crab pots and the sizes of crabs that can be kept. Even though regulations are in place to protect the crabs, their numbers are declining due to deteriorating water quality in Chesapeake Bay. The crabs require additional protection, but too many restrictions could put people out of work because blue crabs are a popular, traditional food in the region, and thousands of people make a living from crab fishing. The natural resources management of the crabs is inadequate because the crabs continue to be harvested in an unsustainable way.
Explanation:
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