Answer:
Chromosomes were first named by cytologists viewing dividing cells through a microscope. The modern definition of a chromosome now includes the function of heredity and the chemical composition. A chromosome is a DNA molecule that carries all or part of the hereditary information of an organism. In eukaryotic cells, the DNA is packaged with proteins in the nucleus, and varies in structure and appearance at different parts of the cell cycle.
Explanation:
Cells reproduce genetically identical copies of themselves by cycles of cell growth and division. The cell cycle diagram on the left shows that a cell division cycle consists of 4 stages:
G1 is the period after cell division, and before the start of DNA replication. Cells grow and monitor their environment to determine whether they should initiate another round of cell division.
S is the period of DNA synthesis, where cells replicate their chromosomes.
G2 is the period between the end of DNA replication and the start of cell division. Cells check to make sure DNA replication has successfully completed, and make any necessary repairs.
M is the actual period of cell division, consisting of prophase, metaphase, anaphase, telophase, and cytokinesis.
How do the chromosomes in most cells of an organism, such as the leaf cells of a plant, compare to the chromosomes in its reproductive cells, which are sperm and egg cells
Chromosomes in "most cells of the organism"(somatic cells) are diploid and the chromosomes are grouped in pairs while the chromosomes in reproductive cells are not paired so there are half the number that would be found in somatic cells so the sex cells are haploid.
Question 3
Contaminants and pollutants cannot enter groundwater
O True
O False
Answer:
false
Explanation:
groundwater groundwater has an abundance of contaminants and pollutants
Which of these statements concerning lipids is not true?
A. Lipids are substances that dissolve in nonpolar solvents.
B. A fatty acids that contains only single covalent bonds between the carbon atoms is called unsaturated.
C. Fats, phospholipids, and steroids are lipids.
D. The building blocks of fats (triglycerides) are fatty acids and glycerol.
Answer:
B
Explanation:
Unsaturated fatty acids have double bonds. Fatty acids that contain only single covalent bonds between the carbon atoms are called saturated.
The statement: "B. A fatty acids that contains only single covalent bonds between the carbon atoms is called unsaturated." is NOT TRUE.
Lipids include the following group of compounds:
FatsOilsPhospholipids SteroidsWaxesThe above compounds are nonpolar hydrocarbon compounds that are insoluble in water. This means they can hardly dissolve in water.
Fatty acids, which is an example of lipids, can either be saturated or unsaturated. If it is saturated, it means they contain only single covalent bond among the carbon atoms while it is unsaturated if a double bond exist in the chain of the molecule.
A fatty acid that contains only single covalent bonds cannot be called "unsaturated." It is rather "saturated."
Therefore, the statement concerning lipids that is not true is: B. A fatty acids that contains only single covalent bonds between the carbon atoms is called unsaturated.
An example of a saturated fatty acid is shown in the attachment below:
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the other liquid waste product in cellular respiration is
Answer: During the process of cellular respiration, carbon dioxide is given off as a waste product. This carbon dioxide can be used by photosynthesizing cells to form new carbohydrates. Also in the process of cellular respiration, oxygen gas is required to serve as an acceptor of electrons.
Explanation: Hope dis helps :)))))
Answer:
the waste products are carbon dioxide and water
define the term gene in your own word
Answer: A gene is in your DNA
Explanation:
Answer:
Gene: a unit of DNA that is usually located on a chromosome and that controls the development of one or more traits and is the basic unit by which genetic information is passed from parent to offspring.
Which structures are found in all cells? Select two options.
A. Chloroplasts
B. Lysosomes
C. Cell wall
D. Cytoplasm
E. Cell membrane
The structures found in all cells are cytoplasm and cell membrane, which are present in options D and E because these are the basic characteristics of the cell, whether unicellular or multicellular.
What is the significance of the cell cytoplasm and cell membrane?Cytoplasm and cell membrane are two essential structures present in all cells and maintain the cell's structural integrity while performing various cellular functions, while cytoplasm is the gel-like substance of the cell and contains the cell's organelles, enzymes, metabolic intermediates, etc.
Hence, the structures found in all cells are cytoplasm and cell membrane, which are present in options D and E because these are the basic characteristics of the cell, whether unicellular or multicellular.
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Three samples of cells from three different patients were unlabelled. One sample was from an 85-year-old man, one was from a 5-year-old boy, and one was from a person with skin cancer. How could you determine to which patient they belonged?
The 85 year old man will have shorter telomeres.
The 5 year old will have long telomeres.
The person with skin cancer will have an abnormal karyotype and abnormal nucleus shape and size during interphase.
Photosynthesis and cellular respiration differ in which of the following
ways?
O The main source of chemical energy in cellular respiration is water.
The energy conversion in cellular respiration takes place in the chloroplast.
O The main source of energy in cellular respiration is glucose.
The final product of cellular respiration is electromagnetic radiation.
Answer:
the main source of energy in cellular respiration is glucose.
Explanation:
photosynthesis creates glucose out of co2 h2o and sunlight. while cellular respiration is almost exactly the opposite.
The ways in which photosynthesis and cellular respiration differ is that the main source of energy in the case of cellular respiration is glucose. Hence, Option C is the correct answer.
The photosynthesis and cellular respiration processes are interlinked with a significant relationship. The products of one process act as reactants in the other. Some of the significant differences between both processes are mentioned as follows:
Photosynthesis takes place only in phototrophs such as plants and algae while cellular respiration can take place in all the living forms. Photosynthesis completely takes place in chloroplasts and cellular respiration in Mitochondria. Glucose is made by the process of photosynthesis while glucose is utilized in cellular respiration to make molecules of ATP.Thus, we can conclude that photosynthesis and cellular respiration differ specifically by the main source of energy. Hence, option C is the correct answer.
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The cell stops being able to allow things into or out of its body. It starves. The
organelle that must be broken is the________
Answer:
The correct answer is - cell membrane.
Explanation:
Cell membrane or plasma membrane is the outer structure that enclosed the cell-matrix and cell organelles and acts as a barrier to the substances and things to move in or out of the cell and allows only specific substances and molecules to move in and out of the cell.
If the cell membrane is not performing its function properly it might result in blocking the various nutrients and other essential molecules to move in and metabolic substances to move out of the cell.
Answer:
Cell Membrane
Explanation:
I just took a test
Brainliest if correct pls
Gymnosperms are different from other plants in that they have seeds but do not have flowers
True or false
Answer right and I'll make you brainlist please
Is a vacuole prokaryotic or eukaryotic
Answer:
what
Explanation:
What are the products for a single pyruvate molecule in the Krebs Cycle?
Answer:
In the conversion of pyruvate to acetyl CoA, each pyruvate molecule loses one carbon atom with the release of carbon dioxide. During the breakdown of pyruvate, electrons are transferred to NAD+ to produce NADH, which will be used by the cell to produce ATP.
Answer:
In the conversion of pyruvate to acetyl CoA, each pyruvate molecule loses one carbon atom with the release of carbon dioxide. During the breakdown of pyruvate, electrons are transferred to NAD+ to produce NADH, which will be used by the cell to produce ATP.
Found this on google, but I hope it helps :)
why is glucose easier to break down?
Answer: I think it’s because Glucose is a simple sugar, or monosaccharide! It’s easier for our body to absorb than disaccharides are.
What are the answers here? Select all that apply.
Answer:
2,4,and 7
I hope this helps!
Which ones are correct?
Answer:
25%
Explanation:
One out of 4 boxes will have a large B, 25 x 4 = 100, thus your answer is 25%.
A coastal area that once supported a thriving fishing industry is overfished. The number of species found living in the marine ecosystem continues to decrease. Which of these activities is most likely to increase the natural biodiversity in the area
Answer:
The answer is "Building artificial reefs and limiting fishing activity".
Explanation:
A variety of different methods could be used to construct an artificial island, which is most habitats are built to create a coral through using raw parts, and farming is the farming company, both "the creation of artificial reefs and restriction of fisheries" the activities are used to control environmental ecosystems throughout the region.
Answer:
Building artificial reefs and increasing fish activity
Explanation:
What are two ways in which cells use the energy temporarily stored in ATP?
Answer: Energy provided by ATP is used in active transport, to contract muscles, to make proteins, and in many other ways
The two main ways in which cells use the energy temporarily stored in the form of ATP is in active transport, and to make proteins.
What is Active transport?
Active transport is the movement of molecules, ions, solutes, solvents against the concentration gradient. The flow of material takes place from the region of their lower concentration to the region of their higher concentration. The transport is against the gradient and hence requires energy to proceed which is given by ATP.
ATP is required to synthesize proteins in the ribosomes of the cell through the process of translation. This is a highly energy-consuming energy and thus required large amount of ATP.
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HELPPPPPP!!! ASAPPPPP!!!!
Which of the following animals exhibit asymmetry?
sea sponge
frog
sand dollar
jellyfish
Answer:
sea sponge
Explanation:
everything else is symmetrical, sea sponges are known for being whacky shapes and sizes and are never symmetrical
Helpppppp plz answer if u know why what an ecosystem with more secondary consumers then primary consumers or producer be a bad thing? Mark brainliest if u know
Which cycle causes an algae bloom, which leads to eutrophication?
Sulfur
Phosphorus
Both
why are humans unable to absorb enough exygen through their skin
Im a few sentences, describe major advantages to an organism that reproduces sexually.
What would happen to a freshwater fish in the ocean?
a its cells would not swell or shrink
b. its cells would shrink and the fish would die
cits cells would swell and the fish would die
3. State and explain Chargaff's rules.
Answer: Chargaff's rules state that DNA from any species of any organism should have a 1:1 stoichiometric ratio (base pair rule) of pyrimidine and purine bases and, more specifically, that the amount of guanine should be equal to cytosine and the amount of adenine should be equal to thymine.
Explanation:
27) C: H.20 + 60, + ADP + P > 6CO2 + Molecule A + ATP
What is molecule A in the formula above?
Need help
Answer:A molecule is an electrically neutral group of two or more atoms held together by chemical ... Single molecules cannot usually be observed by light (as noted above), but small molecules and ... The molecular formula reflects the exact number of atoms that compose the molecule and so characterizes different molecules.
Explanation:
PLEASE HELP!!!! I JUST NEED THIS INFORMATION SO I CAN START!!!
One of Jase's favorite hobbies is catching frogs. Lately, he 's also been studying a lot He about physical chemical changes. He understands that new substances are produced during a chemical change, but what happens during a physical change?
Answer:
On explanation
Explanation:
A physical change when objects or substances undergo a change that does not change their chemical composition, examples would include melting, transition to a gas, textural change, shape, size, color, volume and density.
If two different species belong to the same family, then they also belong to the same _______. *
Kingdom
Class
Order
All of the above are correct
Answer:
All of the above
Explanation:
The order is Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species.
If it is a smaller one it is always in the ones above it.
i need a answer plzzzzzzz thanks :p
Answer:
C
Explanation:
One DNA strand has the nucleotide sequence AACGTA. What is the sequence of the other strand?
Answer:
TTGCAT
Explanation:
The base pears for DNA are Adenine: Thymine and Guanyne: Cytosine
30) These two equations are related because the BLANK of cellular respiration are the BLANK of photosynthesis. The BLANK of photosynthesis are the BLANK of cellular respiration.
Plz fill the blanks in :(
Answer:
Explanation:These reactions occur in the stroma the fluid filled area of a chloroplast ... Photosynthesis Respiration amp Interdependence Two of the 5 basic habitat resources are food and air. ... Without oxygen a cell can extract a net gain of only _____ molecules of ATP from ... Fill in the blanks in the Photosynthesis equation below 15.