Answer:
The scientists who postulated the cell theory were:
-Robert Hook: he was the first scientist to use the word cell, he observed cork and he calls cells the the divisions he saw.
- Leeuwenhoek: he built biconvex lenses and with them he observed microorganisms such as bacteria and protozoa and cells such as sperm and red blood cells.
- Schleiden: he studied embryonic cells and discovered the nucleolus
Will pushing on a car always change the car's mechanical energy?
Approximately two-thirds of the mass of a cell is water, and the water is important to maintain the cell's integrity. What would happen to a plant cell during a period of severe drought?
Answer: The plant cell would die
Explanation:
Water is one of the important component in the body of the living organism. It is used to maintain the integrity of the cell.
The cytoplasm in the cell is completely made of water and it helps in the various metabolic activities that takes place inside the cell.
The water inside cell helps in providing mobility to the cell. In the period of severe drought, the cells integrity will be disturbed and the cell would die deprived of water.
which of these are not examples of matter
-carbon dioxide
-energy
-heat
-jelly
-sponge
Energy is not an example of matter. So the correct option is B.
What is the matter?A material called matter is made up of several kinds of particles that take up space physically and have inertia. The many sorts of particles each have a unique mass and size according to the fundamentals of current physics.
The electron, proton, and neutron are the three types of material particles that are most well-known. Atoms are made up of combinations of these particles.
Quarks and leptons, which are both regarded as elementary particles since they are not formed of smaller units of matter, are the building blocks of matter. Protons and neutrons are formed through the interaction of quarks, which are groupings of subatomic particles. Leptons, which are collections of subatomic particles that react to lesser forces, are among the elementary particles that also comprise electrons.
Therefore the correct option is B.
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An organism had a gene sequence ATGGATACGT that underwent mutation in the noncoding region and formed ATGCGATACGT. The sequence underwent insertion mutation.will This mutation alter the protein function.
An insertion mutation in the noncoding region of a gene may not alter the protein function directly but can affect gene expression or regulation.
The student's question asks whether an insertion mutation in the noncoding region of a gene will alter the protein function. If the sequence ATGGATACGT underwent an insertion mutation and formed ATGCGATACGT, this added base is within the sequence but we cannot determine the effect on the protein function without knowing if the mutation is within the coding or noncoding region. Since the question specifies that the mutation is in the noncoding region, this mutation may not affect the protein directly. However, it's important to understand that changes in noncoding regions can sometimes affect gene expression or regulation, potentially leading to changes in the amount of protein produced or the timing of its production without altering the amino acid sequence of the protein itself.
In complete sentences, describe how eukaryotic plant cells store and remove waste materials.
Eukaryotic plant cells store and remove waste materials by:
Using the cell membrane to send them out through the vacuolesA plant cell that is eukaryotic is one which has a nuclei and contains genetic information.
A eukaryotic plant cell is one that like an animal cell builds up waste materials and it has a special way of disposing of waste through its vacuole where waste products are stored and eventually removed.
As a result of this, we can say that a eukaryotic plant cell stores and removes its waste products from the vacuole, using the cell membrane.
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Explain why a large animal like a humpback whale can feed on such small animals as krill or other plankton and yet still have the energy and mass available to produce such a large biomass.
Which of the following is true of minerals?
Answer: Minerals holds the following properties-
They occur naturally.They have a defined chemical composition.They are inorganic.They have a precise internal arrangement of atoms.Minerals are of various types such as silicate minerals, oxide minerals and so on.They are comprised of one or more than one element.They combine with one another to form rocks.A chemical bond resulting from the loss or gain of electrons and the subsequent attraction of oppositely charged atoms
Which of the following statements violates the cell theory? A) Mitosis produces new cells identical to the parent cell that divided to make them. B) Viruses are not considered to be living organisms, because they are smaller than a cell. C) Though humans are one organism, they are composed of about 100 trillion individual cells. D) Some scientists believe that prions, tiny proteins much smaller than a cell, that can replicate themselves, may be living organisms.
Answer:
d
Explanation:
Why is it difficult, using the traditional definition of species to classify some bacteria and archaea at the species level?
Which description is not a property of a base?
A.) pH lower than 7
B.) Turns litmus paper blue
C.) Bitter taste
D.) Slimy feel
The right option is; A.) pH lower than 7
pH lower than 7, is the description that is not a property of a base.
A base is any solution that has a pH higher than 7. Bases can either be strong (such as lye, ammonia, bleach), or weak (such as baking soda, and toothpaste). The strong bases can be harmful to organisms and can destroy substances. Bases usually have a bitter taste, and a slimy feel (such as in soap). Bases produce a salt and water when they react with water. Also, they change the color of indicators (turns litmus paper to blue, and turns phenolphthalein to pink).
Answer:
the answer is A
4. A stress is considered a "bad" stress when it A. cannot be eliminated. B. keeps a person from feeling good. C. challenges a person to do better. D. doesn't lead to a productive end.
If you ate bacon and fried eggs for breakfast, the largest component of the energy would come from the A) carbohydrates. B) fats. C) proteins. D) sugars.
(Click the picture)
Can someone please answer number 22? I have an answer, but I don't know if it's correct.
My answer: The process that the thin arrows show is conduction. The heat source warms the bottom of the pot and the warmth goes to the sides of the pot, and then the handle.
Which of the following best describes a way in which all living things organisms are similar
All living organisms share fundamental characteristics such as cellular structure, DNA as genetic material, metabolism, growth, responsiveness, reproduction, and the ability to adapt through evolution.
All living organisms, from the complexity of a human being to the simplicity of single-celled bacteria, share several fundamental characteristics that define life. Despite the immense diversity found in the biological world, these shared traits illustrate the common evolutionary history of all life on Earth.
Shared Characteristics of Living Organisms
Cellular Organization: All known living entities are composed of one or more cells, which are considered the basic units of life.Genetic Material: Every organism uses DNA to store and transmit genetic information.Metabolism and Energy Processing: Organisms take in energy and transform it to perform all life functions.Growth and Development: Organisms grow and develop according to the data encoded in their DNA.Response to Stimuli: Living things exhibit sensitivity or response to changes in their environment.Reproduction: Life replicates itself through the process of reproduction, which could be asexual or sexual.Evolution and Adaptation: Through the process of natural selection, organisms evolve adaptations to their environment, which is evidenced by the genetic homology in DNA sequences among related species.Homeostasis: They maintain internal balance, or homeostasis, despite changes in the external environment.Why is carbon so abundant in living things when oxygen is the most abundant element on Earth?
Answer:
Although oxygen constitutes 21% of the total atmospheric gases utilized by the organisms but carbon is the abundant element of the living organisms.
This happens because a living organism is composed of the smallest structural and functional unit called cell which is formed by the aggregation of the small molecule mostly which contains the carbon.
This is due to the reasons as the carbon element shows two properties called catenation sue to which carbon can form long chains by attaching the same carbon element and tetra-valency where the carbon can attach four different elements.
Thus, carbon is the abundant element of the living organism.
until about 200 million years ago , earth 's continents were joined as a single land mass called
O2 is a molecule. oxygen gas Question 1 options: A) True B) False
Viruses cannot reproduce without a host, they do not need to excrete waste nor breathe, but they do die and they do evolve. Scientists, however, do not consider viruses to be living things. Why?
Because living things must exhibit all characteristics of life to be considered living
Because living things must be able to reproduce on their own
Because living things must be able to excrete some form of waste
All of the above are true
Viruses are not considered living things because they do not meet all the criteria of life, such as the ability to reproduce independently and carry out metabolic processes. They depend entirely on host cells for reproduction, lacking the cellular machinery necessary for living organisms.
Explanation:Scientists do not consider viruses to be living things because they do not exhibit all the necessary characteristics of life. Viruses cannot reproduce without a host, they do not maintain homeostasis, they lack metabolic processes, and they do not grow or respond to their environment in the way living organisms do. Living things must be able to reproduce on their own, maintain a stable internal environment, carry out metabolism, and respond to their environment. Despite sharing some traits with living organisms, such as containing genetic material and the ability to evolve, viruses do not meet all the criteria needed to be considered alive.
The correct answer to the student's question is: 'Because living things must exhibit all characteristics of life to be considered living'. This encompasses the inability of viruses to reproduce on their own, the lack of metabolic processes, and the absence of other life-sustaining activities that are characteristic of living organisms.
Extended Response: Explain in your own words why it is important to conserve water. Then list 3 ways in which you can conserve water.
what are the monomers of lipids?
Answer:
The Monomers of lipids are Fatty acids and glycerol
Explanation:
What is the taxonomy of each organism from largest to smallest grouping?
What is the the result of mixing a water molecule and an oxygen molecule together?
A.they are not attracted to each other because one is polar and one is no polar.
B. They are attracted to each other because they are both polar.
C. They are not attracted to each other because water contains an ion bond.
D. They are attracted to each other because they are both nonpolar.
Final answer:
Water is a polar molecule with a bent shape that leads to partial charges, while an oxygen molecule is nonpolar. Water and oxygen do not attract each other based on polarity. So the correct option is A.
Explanation:
The result of mixing a water molecule and an oxygen molecule can be assessed by understanding the polarity of each molecule. Water is a polar molecule due to its bent shape and the difference in electronegativity between the hydrogen and oxygen atoms, leading to partial positive and negative charges at different parts of the molecule. Since the oxygen molecule (O₂) is nonpolar and does not have a separation of charge, water and oxygen are not attracted to one another based on polarity.
Therefore, the correct answer is A. They are not attracted to each other because one is polar and one is nonpolar.
Drag the labels to the correct locations on these images of human chromosomes
In Biology, human chromosomes are structures containing our genetic information and consist of three main regions: the centromere, the short arm (p), and the long arm (q). A standard human cell contains 23 pairs of chromosomes, totaling 46.
Explanation:The request to 'drag the labels to the correct locations on these images of human chromosomes' involves an understanding of human genetic structure. Human chromosomes consist of DNA and proteins and they carry our genetic information. A typical human cell contains 23 pairs of chromosomes, for a total of 46. These include 22 pairs of autosomes and one pair of sex chromosomes, which determine a person's sex.
Generally, each chromosome has three key regions: the centromere, the short arm (p), and the long arm (q). The centromere is what links sister chromatids (the identical copies formed during replication) together. The region above the centromere is known as the 'p' arm, while the region below is the 'q' arm.
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What part of the enzyme maintains acid balance in your stomach? A. Magnesium B. Iron C. Zinc
Which statements are true concerning our interpretation of the results of an experiment?
We will always infer a correct conclusion from accurate data.
An experiment performed correctly will always result in the correct interpretation.
Conclusions inferred from data are often judgments.
Judgment may be affected by what we already think is true (prior knowledge).
Select all answers that are correct.
Before we start an experiment, we should check with other people who have performed the same _____.
procedure
experiment
investigation
Answer:
Conclusions inferred from data are often judgments.Judgment may be affected by what we already think is true (prior knowledge).Explanation:
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what is a Divergent boundary and where is located?
In order for this code to represent a piece of DNA, which base must be replaced by thymine?
A) adenine
B) cytosine
C) guanine
D) uracil
What is the element of an atom that has six protons and six electrons
A material you are testing conducts electricity but cannot be pulled into wires. It is most likely a _____.
metal
nonmetal
metalloid