Answer:
B
Explanation:
A population of mosquitoes is exposed to the pesticide DDT for several generations. At the end of that time, most individuals in the population are resistant to DDT and the most likely reason is that some individuals in the original population had the mutations that led to resistance. Option B is correct.
What is mutation ?Mutation is the change in which there is slight change in the genome sequence of a DNA or RNA along with the gene. The mutation lead to various types to adaptations along with the diseases.
Resistance is the condition when the species on the multiple exposures develop certain kind of adaptations to it and these traits are sometime inherited sometimes not inherited.
Mutations are friendly as well where sometimes a disease causing mutation can be altered with the further mutation in it.
Therefore on the multiple exposure it led to condition of resistance in the species.
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What mass of methane gas (CH4) is required in order to follow the Law
of Conservation of Mass?
Answer:
2.4g
Explanation:
i got the same question and got it right
PLEASE HELP DUE SOON!
Answer:
5. Plant Cells
6 a. Flagella
6 b. Cilia
7. Vacuole
8. ?
Cell Types
1. Eukaryote
2. Prokaryote
Name the primary producers of grassland ecosystem
Answer:
Explanation:
Grasses, shrubs, trees, mosses, lichens, and cyanobacteria are some of the many producers found in a grassland ecosystem.
Please help, any unnecessary answers will be reported. Thanks :)
Answer:
The one all the way over to the left, the dark blue one. I hope this helps!
Explanation:
Answer: first one
Explanation: The brain uses the nerves to tell the muscles when to move. The nerves also deliver information on what to do in a fight or flight case
Identify two features that a theory must have, to qualify as a scientific theory.
can y’all help me this one??
Question and answer are in there
Answer:
cold coastal area
Explanation:
since the hurricanes occur this often it must be in coastal area
Answer:
I believe it's warm coasted area, not entirely sure tho
Explanation:
the major purposes of Mitosis in living organisms includes, the ___ of organisms, ___ injuries,and maintenance of the organism, during ____ (a phase of cell division) the cell grows larger and replicates its DNA in order to prepare for cell division, known as _____. the original cell that divides is called the ____ while the two new cells are called ____
answers
mitosis, parent cell , daughter cell , growth , healing, and interphase
PLEASE ANSWER, WILL GIVE BRAINLIEST
Which of the following best describes the use of rainforest plants as anticancer drugs? a. Most rainforest plants have been tested for their cancer fighting properties.
b. Twenty-five percent of the active ingredients in cancer drugs are exclusively rainforest plants.
c. The most powerful anticancer drugs are not rainforest plants.
d. All of the above
Answer:
b. Twenty-five percent of the active ingredients in cancer drugs are exclusively rainforest plants
Explanation:
Answer:
B.
Explanation:
What are the sides of the DNA ladder made of?
Answer:
The sides of the ladder are made of alternating sugar and phosphate molecules. The sugar is deoxyribose. The rungs of the ladder are pairs of 4 types of nitrogen bases. Two of the bases are purines- adenine and guanine.
Explanation:
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Answer:
Explanation:
The shape of DNA is a double helix, which is like a twisted ladder. The sides of the ladder are made of alternating sugar and phosphate molecules. Deoxyribose, which is a pentose, and a phosphate group are the two molecules that together form the two sides of the DNA. The rungs of the ladder are pairs of 4 types of nitrogen bases.
what is the probability for a child to inherit one of the two alleles from her dad??
a: 100%
b: 50%
c: 0%
d: impossible to know
Answer:
A: 100%
Explanation:
We get one allele from each parent, one from mom and one from dad. Hope it helps :)
If DNA code consists of only four nitrogenous bases, how can it produce so much variety among
organisms of the same species?
Explanation:
I tnought this will help you
If DNA code consists of only four nitrogenous bases, still it produces so much variety among organisms of the same species with the help of Codons and amino acids sequences.
What do you mean by Nitrogenous bases?Nitrogenous bases may be defined as a molecule that contains nitrogen and possesses the chemical properties of a base. The nitrogenous bases that are found in DNA are Adenine (A), Guanine (G), Thymine (T). and Cytosine (C). Uracil (U) is present instead of Thymine in RNA.
There is a total of 4 nitrogenous bases that are found in DNA and RNA. Each codon codes with the help of three nitrogenous bases. So, total variations = [tex]4^3[/tex] = 64.
But there are only 20 amino acids that are commonly known. Some codons are stop codons, they do not code for any amino acids. While some codons code for the same amino acids.
Therefore, If DNA code consists of only four nitrogenous bases, still it produces so much variety among organisms of the same species with the help of Codons and amino acids sequences.
To learn more about DNA structure, refer to the link:
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A Ecosystem C Community
B Habitat D Population
Choose the most appropriate vocabulary term from the list above
1 ________ All the living and non living things in an area
2 ________ All the ants in an anthill
3 ________ An area that provides food and shelter
4 ________ Fish, frogs, turtles, lily pads and dragonflies are all members of the same what?
5 ________ All the blackbirds in your neighborhood
6 ________ A forest
7 ________ The damp soil within a forest in which a mushroom grows
8 ________ Different populations that live together in a particular area
9 ________ A prairie dog, a hawk, and a badger all members of the same what?
10 ________ The rainbow trout in a stream
Answer:
1: a
2: d
3: b
4: c
5: d
6: b
7: b
8: c
9: c
10: d
Answers proven from test book. :)
In this Punnett square used to predict genetic crosses, RR represents the _________ of the organism.A) appearance B) chromosomes C) genotype D) phenotype
Answer:
Genotype
Explanation:
A genotype is represented by two letters, called alleles, and describes the genes of an organism. Phenotype means the physical characterisitics of an organism. Chromosomes and appearance are irrelevant to this question. Hope it helps :)
Answer:
C) genotype
Explanation: I took the test
Is race a biological characteristic determined by our genes?
Answer:
No, they are not. The concept of human races appears to be solidly grounded in present-day biology and our evolutionary history. But if you asked that conference of geneticists to give you a genetic definition of race, they wouldn’t be able to do it. Human races are not natural genetic groups; they are socially constructed categories. Genes certainly reflect geography, but unlike geography, human genetic differences don't fall along obvious natural boundaries that might define races.
SCIENCE
Sandy made the following chart comparing the energy sources of the carbon cycle. What correction needs to be made?
A. Decomposition is driven by internal energy.
B. Seashell creation is driven by internal energy.
C. Formation of fossil fuels is driven by solar energy.
D. Rock formation is driven by solar energy.
Rock formation is driven by solar energy
Answer:
a.
Seashell creation is driven by internal energy
Explanation:
A(n)\ is an area of the planet that shaves similar conditions of climate, fauna (animal life), flora (plant life) and geography .
1.biome
2.environment
3.habitat
4.ecosystem
Answer: A BIOME is an area of the planet that shaves similar conditions of climate, fauna (animal life), flora (plant life) and geography . The correct option is 1.
Explanation:
BIOME is defined as large natural terrestrial ecosystems which shares similar conditions of climate and consists of plants and animals that equally have common characteristics with their environment. The word terrestrial is used because plants form the bulk of the community in an ecosystem. The type of vegetation in a biome is largely determined by climatic factors, especially rainfall and temperature. Regions throughout the world which have similar climates have similar biomes. This causes zones of different biomes to occur from the equator to the Arctic and to the Antarctic. For example,
--> in equatorial and tropical areas where temperature is high all the year round tropical forests occur;
--> in temperate regions coniferous and deciduous forests occur;
--> while treeless plains (tundra) are found in the cold arctic regions.
Climates also changes with height above the sea level.
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Which of the following correctly matches a property of an organic molecule with how that property helps the organic molecule function in living organisms?
A. Carbohydrates lower the activation energy of certain reactions. This allows metabolic processes to take place at a rate that can sustain life.
B. Proteins contain nucleotides that encode genetic material. This allows proteins to accurately pass genetic information from one cell to another.
C. Nucleic acids contain multiple carbon-hydrogen bonds. This allows nucleic acids to provide energy for living organisms by breaking these bonds.
D. Lipids are insoluble in water. This allows lipids that make up biological membranes to regulate the entry and exit of many substances.
No dam links
Answer:
D. Lipids are insoluble in water. This allows lipids that make up biological membranes to regulate the entry and exit of many substances.
Explanation:
pls help asappppppppppp
Answer:
carbon and hydrogen
Explanation:
elements used in the photosintheses
Information specifying the traits of an organism is carried in DNA by
А .packing atoms loosely into the shape of a round globule
B. packing molecules loosely into the shape of a pleated sheet.
C. packing atoms tightly into the shape of a single spiral.
D. packing molecules tightly into the shape of a double helix.
Answer: c
Explanation:
In what ways can ecosystems be analyzed by the levels of organization within them?
Answer:
nniiii him jjijjjbjbhbijjhh oj
The greenhouse effect on Earth keeps it warm enough for liquid water to exist. However, on Venus, the greenhouse effect warms the planet to ___. A 460°C B 900°C C 90°C D 47°C
Answer:
A. 460°C
or about 900 degrees fahrenheit
If there weren't alleles for different traits, but rather only one version of a gene for different traits, how would humans be different?
Answer:
Humans would look exactly alike
Explanation:
An allele which is a variation of a gene which expresses a particular trait(Phenotype).
For example, if humans have a gene for eye color but has different alleles for the color being black or brown for example, their phenotypes are different since the alleles are different.
But, if the alleles for the eye color are all the same, the eye color and every other phenotype would be the same. So, there would be no variations in eye color, height, color of skin etc. So, all humans would thus look alike having one set of genes for the different traits.
Which statements about geocentric model and heliocentric model are true? Select the two correct answers.
A. They both are models of the solar system.
B. They both show the position of Earth relative to the Sun.
C. They both show Earth at the center of the solar system.
D. They both show the Sun at the center of the solar system.
Answer: Your correct answer would be both A & B.
Explanation: A is the correct answer because both of these models are in fact models of our solar system. The geocentric model had Earth at the center of the solar system with all the other planets and sun rotating around us. The heliocentric model is the accepted model of our solar system today with the sun at the center and planets rotating in slightly elliptical fashions around it due to gravitational pull. B is also correct because as I just explained, both models position Earth in relativity to the sun though both models vary greatly. The aim of both of these models was to specify where Earth was exactly in the solar system. I hope this has been of use to you! Please do not hesitate to ask if you have other questions :)
The two correct statements about the geocentric and the heliocentric model are:
They both show the position of Earth relative to the Sun. They both are models of the solar system.The geocentric model
The geocentric model has the assumption that the earth is at the center of the universe. The sun and the planets are said to revolve around the earth in this model
The heliocentric model:
The heliocentric model has the assumption that the sun is at the center of the universe. The earth and the planets revolve around it.
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what can cause rapid revolution?
Answer:
Although scholarly debate continues about the exact causes of the Revolution, the following reasons are commonly adduced: (1) the bourgeoisie resented its exclusion from political power and positions of honour; (2) the peasants were acutely aware of their situation and were less and less willing to support.
Explanation:
brainliest?
The organism in the photo is a daphnia, or water flea. Daphnia are tiny aquatic organisms that live in most freshwater habitats. Adults range from less than 1 to 5 mm in length. They are good swimmers and eat mostly algae. Daphnia become mature at 5 to 10 days, and an adult female can produce up to 100 eggs every 3 or 4 days during its 2-month life span. When harmful algae rapidly increase in the daphnia environment, daphnia can develop adaptations to tolerate the negative effects of the algae within 10 years. What characteristic of the daphnia allows the population to adapt to environmental change
Answer:
The characteristic of daphnia which allows the population to adapt to the environmental change is the short generation time.
Explanation:
As evident from the text, the maturity comes in 5 to 10 days and they reproduce for the next 2 months at a rate of 100 eggs every 3/4 days. This is a short generation time which makes the evolutionary changes easy and less time-consuming to incorporate.
Identify following phases of meiosis (URGENT!)
Answer:
Prophase I
Metaphase I
Anaphase I
Telophase I
Meiosis stage 1 Phases ^
Meiosis stage 2 phases
Prophase II
Metaphase II
Anaphase II
Telophase II
In order from youngest to oldest, what is most likely the correct order for the rock layers??
Answer: 1, 5, 2, 3, 4.
Explanation: Using process of elimination layer four should be the oldest and the only one that has layer four last is number 2. Therefore I assume it is number 2.
Single celled organisms are part of the ____________________ group
Question 2 options:
Eukaryota
Bacteria
Archaea
All of the above
Answer:
bacteria and archaea
Explanation: Only the single-celled organisms of the domains Bacteria and Archaea are classified as prokaryotes—pro means before and kary means nucleus
What role did you play in the production of the protein product?
Explanation:
Proteins are large, complex molecules that play many critical roles in the body. They do most of the work in cells and are required for the structure, function, and regulation of the body's tissues and organs.These proteins provide structure and support for cells. On a larger scale, they also allow the body to move.
1. Which systems (2) are primarily responsible for movement of the body
Answer:
The correct answer is -muscular system and skeletal system.
Explanation:
The skeletal system and the muscular system work together to move the body or body parts. Different types of tissues form the muscular system that and their action on bones controls the movement of the body in vertebrates.
Tendons are tough muscles that attach with the bones and joints allow the movement by contraction of muscle that helps in moving bones from joint. Muscle normally acts by contracting and relaxing in pairs.