Answer:
It is false
Explanation:
How can a mixture of sand and water be separated?
A) Chromatography
B) Magnetic Attraction
C) With a Filter
D) Crystallization
What are X-Rays used for?
A. cook food
B. form images of internal organs
C. get TV signals
Answer:
B
Explanation:
To look inside of human body and see all the organs and other stuff.
Which three elements make up most of the human body?
Answer:
The three elements make up most of the human body are
1. Oxygen
2. Carbon
3. Hydrogen
Explanation
The human body is made up of many different elements, but oxygen, carbon, and hydrogen these elements are present in abundance.
Oxygen: oxygen is the first major element that is present in the abundant, about 65 percent total weight of a human body is made up of oxygen. Oxygen is consumed by both inhalation and exhalation process.Carbon: It is the second most important element of the human body, about 18 percent total weight of a human body is made up of carbon.carbon is consumed by the food material.hydrogen: It is the third major element of the human body, about 9 percent of the total weight of the human body is made of hydrogen. In a water molecule, two hydrogen are there.During a quiet eruption, a lava flow may set fire to and then bury everything in its path. true or false
The answer is True.
When a volcano erupts, that lava or magma it's made of liquid rock from the earth's core.
It's between 700º and 1200ºC, and it's not possible to control it.
The amount of lava depends on the volcano but, the flow will set on fire everything that touches until the flow stops and goes cooler.
Describe two ways that steroids differ from fats. ...?
Steroids differ from fats in two main ways: they have a fused ring structure and many of them have the -OH functional group, which puts them in the alcohol classification.
Explanation:Steroids differ from fats in two main ways:
Steroids have a fused ring structure, while fats do not. This ring structure is made up of four linked carbon rings, which is characteristic of all steroids.Many steroids have the -OH functional group, which puts them in the alcohol classification. Fats, on the other hand, do not have this functional group.
The ______ nervous system receives information from sense organs and analyzes that information.
A: Central
B: Peripheral
a virus is unlike an organism in that the virus is __________.
A virus is unlike an organism in that the virus is not considered a living organism.
Unlike organisms, viruses lack the essential characteristics of life, such as the ability to grow, reproduce independently, and carry out metabolic processes.
Instead, viruses are obligate intracellular parasites that require a host cell to replicate and carry out their life cycle. They consist of genetic material (DNA or RNA) enclosed in a protein coat but lack cellular structures or machinery.
Viruses cannot perform vital life functions on their own and are inert outside a host cell.
Their replication involves hijacking the host cell's machinery to produce new viral particles, highlighting their distinct nature from living organisms.
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Molecular biologists are using __________ to directly manipulate genes for practical purposes.
A) DNA cloning
B) DNA polymerization
C) genetic engineering
D) bacteriophage infestation (help plz)
Answer: C) genetic engineering
Molecular biologists are using genetic engineering to directly manipulate genes for practical purposes. Genetic engineering is an artificial technique for manipulation of the genome of the organism which involves deletion or insertion of genes of interest. This artificial manipulation is done in order to remove mutant genes from the organisms genome to cure diseases and disorders, new genes are introduced which can produce desirable traits.
what types of animal cells are most similar to undifferentiated plant cells in a tissue culture
Why do normal cells divide?
Which of the following plant adaptations aids savanna plants during droughts?
a.
spines
b.
water storage
c.
growth patterns
d.
bitter taste
The correct answer is (b) water storage.
Savanna is a tropical place located in which has high temperature round year.The savanna plants had adapted many adaptation to protect themselves from drought. They adapted a water storage organ called baobab.These are long cylindrical shaped trunk used to store water in dry conditions.This adaptation was necessary to store water for the times when there is a scarcity of water.These adaptation are necessary so that the trees can regrow in the next season after drought.
Savanna plants have adaptations like water storage, spines, and bitter taste to aid them during droughts.
Explanation:Savanna plants have several adaptations to aid them during droughts. One of these adaptations is water storage. Plants like cacti have modified stems that can store water, allowing them to survive long periods without rain. Another adaptation is spines. These spines reduce the surface area of leaves, minimizing water loss through evaporation. Lastly, some plants develop a bitter taste as an adaptation. This helps deter herbivores, ensuring the plant's survival during dry periods.
Both cellular respiration and the burning of fossils fuels release energy. This can be attributed to
A)
the breaking of bonds during oxidation.
B)
the reduction of carbon to carbon dioxide.
C)
the formation of bonds in new organic compounds.
Eliminate
D)
the hydrolysis of water molecules into oxygen and hydrogen.
The answer is
A) the breaking of bonds during oxidation.
Fossil fuel is a hydrocarbon which contains carbon and hydrogen and when it is burnt the carbon forms carbon dioxide and the hydrogen forms water. For both these processes the fuel uses free oxygen from the air. In both cases the formation of the Carbon-Oxygen and Hydrogen-Oxygen chemical bonds produces energy in the form of heat.
Dolly was a female domestic sheep, and the first mammal to be cloned from an adult somatic cell, using the process of __________________.
A) DNA transfer
B) cell transfer
C) oocyte transfer
D) nuclear transfer
Answer: The correct answer for the blank is-
D) nuclear transfer.
Dolly was a female domestic sheep, and the first mammal that was cloned using an adult somatic cell ( particularly a mammary gland cell from a Finn Dorsett sheep). She was produced using a technique, which is termed as somatic cell nuclear transfer.
In this technique, the nucleus from an adult somatic cell was transferred to an unfertilized oocyte ( which was first enucleated that is nucleus was removed). After this, unfertlized egg was activated using electrical stimuli, which initiated cell division and produced Dolly.
Thus, option D) nuclear transfer is the right answer.
A bacterium is placed in a hypertonic solution. Which of the following would the bacterium use to maintain osmotic pressure?
a. Active transport
b. Ion pumps
c. Facilitated diffusion
d. Contractile vacuole
Answer:
c. Facilitated diffusion
Explanation:
The bacteria shown in the question is in a hypertonic solution. Thus, we can conclude that the solution contains a higher solute concentration than the solute concentration inside the bacteria. For the osmotic pressure to be maintained the bacteria will receive solution solutes until the concentrations are balanced. This process is done through facilitated diffusion.
Some substances have certain characteristics that make it impossible for them to cross the cell's lipid bilayer by simple diffusion. However, they can also pass the membrane by passive transport, this type of process known as facilitated diffusion. In this way, particles can enter or leave the cell through their attachment to specific proteins, known as carrier proteins, or through aqueous pores of protein channels, both present in the cell membrane.
Which RNA base pairs with the adenine In DNA
Answer:
The correct answer is uracil.
Explanation:
The associations between the nucleobases take place via the complementarity of nucleobases. In the DNA, the base complements are adenine-thymine and guanine-cytosine. In the RNA, the base complements are adenine-uracil and guanine-cytosine. Thus, only DNA comprises thymine, while in RNA uracil is found in place of thymine.
RNA is a kind of nucleic acid, which performs an essential function in the flow of information from the DNA to the proteins. For the expression of the gene, information has to be conducted via RNA. Each nucleotide in RNA comprises a ribose sugar, a nitrogenous base, and a phosphate group. The nitrogenous bases in RNA comprise guanine, adenine, uracil, and cytosine, that is, thymine gets substituted with uracil.
Which one of the following characteristics of Archaea enables them to survive in extreme environments?
A.Their ability to survive on other sources of energy if the required resources are not present.
B.The presence of peptidoglycan in their cell wall, which increases their ability to thrive in extreme conditions.
C.Their highly locomotive abilities which enable them to move to suitable environments.
what organelles/cells houses the genetic material? ...?
in order to be classified as a living thing an organism must have ?
Living organisms have different characteristics and they respond to stimuli, respire, move, dependent on the environment, reproduce, and growth.
All living organisms are made up of a large number of cells. Each cells have a nucleus and cytoplasm. If the nucleus is present in the cell is called a eukaryotic cell and if the nucleus is absent is called a prokaryotic cell. Each cell present in the living organism has a specific function.
Thus, living cells have the characteristics to reproduce, and grow organisms, and living organisms react to the environment, regulation, homeostasis, energy processing, and respiration. These characters define life.
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Sea stack, sea arch and sea caves are all examples of land features created by
Answer:
B) wave erosion
Explanation:
Which of the following statements about resource use is true?
a. The use of renewable resources has no inherent costs.
b. Resource use, whether renewable or nonrenewable, must be carefully managed to reduce the impact on the environment.
c. Nonrenewable resources are used for energy, because there are no renewable resources that can be used as a source of energy.
d. The overuse of nonrenewable resources is less environmentally damaging than the overuse of renewable resources.
The statement that is true about resource use is as follows: resource use, whether renewable or nonrenewable, must be carefully managed to reduce the impact on the environment.
How are resources effectively utilized?Resources are used by humans to supply energy for their daily needs.
Resources can either be renewable or nonrenewable depending on whether it can be replenished or not.
However, the use of resources, whether renewable or nonrenewable, must be carefully managed to reduce the impact on the environment.
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Because there is more oxygen in an alveolus (sac in the lung) than in the blood around it, oxygen diffuses
Answer:
When there is more oxygen in alveolar sac than in blood capillaries, oxygen will diffuse from alveolar sac to blood capillaries.
Explanation:
The concept behind this is very simple. Oxygen or carbon dioxide move according to their partial pressure differences at various places. Gases always move from an area of high partial pressure to an area of low partial pressure. Pulmonary artery carries the deoxygenated blood from heart to lungs. Near the alveoli of lungs exchange of gases take place. Oxygen from the inhaled air enters into the blood capillaries and carbon dioxide from the blood capillaries move into the alveolar sac for exhalation.
What is the product of translation? a strand of rna, an amino acid chain, a nucleic acid chain, or a strand of dna
T or F
ATP and NADPH are two types of protein carries T or F
ATP and NADPH are two types of protein carries
In one type of dog, black spots (B) are dominant over brown spots (b) and long tails (L) are dominant over short tails (l). Complete a dihybrid cross for parents with the genotypes: BbLL × BBLl and answer the following in complete sentences.
1. Describe how you would set up a Punnett square for this cross.
2. List the likelihood of each possible offspring genotype.
3. List the likelihood of each possible offspring phenotype.
Assuming genes that assort independently, do not interact, and express complete dominance, the expected genotypes are 25% BBLL, 25% BBLl, 25% BbLl, 25% BbLL. The expected phenotype is 100% black spots and long tails
---------------------------------
Available data:
Two diallelic genes. One codes for spots color. The other one codes for tail length.
Spots
B is the dominant allele and codes for back spotsb is the recessive allele and codes for brown spotsTail length
L is the dominant allele and codes for long taill is the recessive allele and codes for short tailCross:
Parentals) BbLL x BBLl
Gametes) BL, BL, bL, bL BL, BL, Bl, Bl
Punnett square) BL BL bL bL
BL BBLL BBLL BbLL BbLL
BL BBLL BBLL BbLL BbLL
Bl BBLl BBLl BbLl BbLl
Bl BBLl BBLl BbLl BbLl
1. Describe how you would set up a Punnett square for this cross.
To make the Punnett square, first, you need to define the parental genotypes. Then you need to define the gametes each parent contributes.
The gametes of one parent are placed in the upper part of the square, while those of the other parent are placed on the left side.
The square is filled with a combination of gametes.
2. List the likelihood of each possible offspring genotype.
F1) Genotype
4/16 = 25% BBLL, h0m0zyg0us dominant for both genes4/16 = 25% BBLl, h0m0zyg0us dominant for B gene, heter0zyg0us for L gene4/16 = 25% BbLL, h0m0zyg0us dominant for L gene, heter0zyg0us for B gene4/16 = 25% BbLl, heter0zyg0us for both genes.
3. List the likelihood of each possible offspring phenotype.
Phenotype
16/16 = 100% dogs with black spots and long tails, B-L-.Note that the symbol - represents either a dominant or recessive allele.
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What stores information in a cell
DNA, or deoxyribonucleic acid, is the molecule that stores genetic information in a cell. It carries the instructions for a cell's functions and replication and is found in the nucleus in eukaryotic cells and the nuclear zone of prokaryotic cells. Gene expression and cellular differentiation are dictated by DNA.
Explanation:The information in a cell is stored in the form of deoxyribonucleic acid, commonly known as DNA. DNA is a molecule that carries the genetic instructions used in the growth, development, functioning, and reproduction of all known living organisms and many viruses. DNA stores the information needed to build and control the cell through the sequence of its four bases: adenine, thymine, guanine, and cytosine.
DNA replication is critical for the transmission of genetic information from one generation of cells to the next, ensuring that each new cell receives a complete set of DNA. This occurs in the nucleus of eukaryotic cells, and a specific nuclear zone in prokaryotic cells. The DNA molecule is composed of a long chain of nucleotides, each of which consists of a 5-carbon sugar, a phosphate group, and a nitrogen-containing base.
Furthermore, our understanding of how DNA stores and utilizes genetic information comes from the discovery of its structure by Watson and Crick in 1953. This discovery has been essential for modern biology, helping us understand the process of gene expression and how different cell types are formed, despite having the same genetic code.
Some soils, like clay, hold water tightly. Other soils, like sand, let the water run through. What property of soils is MOST IMPORTANT in determining how water moves through the soil? A) color B) layers C) size of particles D) earthworms present
Answer:
its c: layers
Explanation:
What does heredity mean?
________ is the area at the headwaters of a stream where most of the sediment is derived.
what can happen to the soil after the mice have destroyed the roots of the grass?
Because of their physical capabilities, mice can cause significant damage. They are ultimate climbers and swimmers. Mice lives in grassy or bushy habitats, where they nest underground in shallow burrows or aboveground in densely vegetated area. They damage the roots of plants that leads to their destruction.
What are the methods to control mice?Mice gnaw and severely damage the bark and roots of young trees. Biting into ripening tomatoes, cucumbers, beans, peas, and other fruit close to the ground.
By digging tunnels, they continuously mix waste and food stores with the soil. The nutrients from the food they eat are thus quickly returned to the soil.
Thus, in this way mice affect the soil leading to destruction of roots.
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Which of the following best describes what happens to water molecules after they are released from plants through transpiration?
a. They will combine to form runoff and flow into rivers, lakes, and oceans.
b. They will cool and form dew, clouds, or fog through condensation.
c. They will fall to Earth in the form of rain, sleet, or snow.
d. They will undergo evaporation and change to a gas. ...?
Answer: d. They will undergo evaporation and change to a gas. ...?
Transpiration is a process of loss of excess water from the small pores present on underside of leaves. The water released by this process evaporates and converted into water vapor (gas). The water vapors formed by this process are released in the atmosphere. The rate of transpiration depends upon weather conditions, such as humidity, sunlight, temperature, and wind.