Answer:
Reproductive cells have half the amount of chromosomes than body cells
Explanation:
I think that you are talking about body cells when you say "most cells in an organism." If that is the case, then the reproductive cells, sperm and egg cells, have half the amount of chromosome than body cells.
For example: Human body cells have 46 chromosomes. Human reproductive cells has 23 chromosomes.
In sexual reproduction, each parent gives 1/2 of a full set of chromosomes to create the full set needed for an organism.
The chromosome number in the vegetative cells of an organism is usually a double of the chromosome number in its reproductive cells.
Normal organisms contain a diploid (2n) number of chromosomes. Usually, the sex cells such as sperm and egg cells contain half of the number of chromosomes in other non-reproductive parts of organisms. sex cells such as sperm and egg cells participate in sexual reproduction. Hence, they are otherwise known as gametes.
During fertilization, the sperm cell with its haploid (n) chromosome number fuses with the egg cell, also with its haploid chromosome number to form a zygote (2n) with a complete chromosome set.
Without the sex cells containing half of the normal diploid chromosome, resulting zygotes from fertilization will not be having the normal chromosome number of organisms.
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Which process in plant physiology could not occur if the opening of the undersides leaves are closed?
A)photosynthesis
B)phototropism
C)reproduction
D)respiration
A) Photosynthesis will stop if the openings on the underside of the leaves are closed.
Explanation:
Photosynthesis produces sugars (glucose) by using carbon dioxide and water in presence of sunlight and chlorophyll. And oxygen is produced as a bye product of photosynthesis.
For the process of photosynthesis to take place continuously, it is very necessary that a continuous supply of Carbon dioxide and water is maintained into the cell.
Carbon dioxide enters the cell by the process of diffusion. The gases diffuse in and out of the plant tissue through the small openings on the surface of the leaves. These openings are called stomata.
If stomata remain closed then the diffusion of gases will cease . As a result photosynthesis will stop due to lack of raw material. Soon the plant will use up the reserve food and starve to death.
Folds are usually formed by _____.
1. subduction
2.divergence
3.convection
4.compression
5.inertia
please help soon!
Answer:
Folds are usually formed by Compression
Explanation:
Compression has to do with applying force to a material or substance to give another shape, in order to get a fold compression is used.
the table describes several organisms in a Georgia ecosystem.
Which path show one way that energy can move through the ecosystem?
a) saw palmetto-> Eastern woodrat-> bald eagle
b) bald eagle-> Eastern woodrat-> rust fungus
c) black bear-> saw palmetto-> rust fungus
d) Eastern woodrat-> rust fungus-> saw palmetto
Answer:
A
Explanation:
Energy moves through an ecosystem from plant to apex predator. The saw palmetto is a plant, the woodrat is a herbivore so it comes second, and the bald eagle is the apex predator.
What did miller an ureys experiment provide evidence for
Answer/ Explanation:
The Miller-Urey experiment simulated hypothetical conditions present on early Earth which attempted to investigate the origin of life.
It used a collection of glass tubes and vessels containing water, hydrogen, methane and ammonia, which were believed to be the main components of the atmosphere on early earth. The earth's atmosphere was simulated using electrons, heat and cycling of the chemicals.
The experiment showed that this was sufficient to produce amino acids, the building blocks of proteins, which carry out essentially all living processes.
which is not true of gene expression?
a. it creates different dna within each of your cell types
b. it explains how a cell functions
c. it is the specific combination of genes that are turned on or off
d. it occurs because of cellular signals within your body
All cells in an organism have the exact same DNA, despite the fact that they might express different genes. The incorrect statement about gene expression is that it results in different DNAs in different kinds of cells.
Explanation:The statement that is not true about gene expression is: it creates different DNA within each of your cell types. This statement is false because all cells within a single organism have the same DNA. The different cell types in your body (like the cells in your brain versus the cells in your liver) do not have different DNA. What distinguishes different cell types is the specific combination of genes that are turned on, or expressed, in that cell type, not a different DNA.
Gene expression refers to the process by which the information encoded in your genes is used to create functional gene products, such as proteins. It does not, however, create different DNA within each of your cell types. Rather, different combinations of genes are turned on or off in different cell types, leading to the specialization and functionality of each cell.
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which observation proves that a cell is eukaryote
The observation that will prove that a cell is eukaryote is, the presence of genetic material within a well defined nucleus which is separated from the cytoplasm by the double layered nuclear membrane.
Explanation:
Cells can be prokaryotic or Eukaryotic depending on the presence or absence of nucleus in them.
Bacteria,archaebacteria and cyanobacteria are prokaryotic and all other known higher organisms are eukaryotic.
The feature that differentiates a prokaryotic cell from an eukaryotic cell is the absence of a distinct nucleus in them.
Eukaryotes have their genetic material enclosed by a double layered nuclear membrane while prokaryotes have their genetic material laid free in their cytoplasm.
The another difference is the lack of membrane bound organelles in prokaryotes which are present in eukaryotes.
Some eukaryotic cells lose nucleus at maturity, but they have it in their premature stages. For example, Red blood cells of humans.
A prescribed burn is _______.
Answer: Hazard reduction burning
Explanation: it is also known as backfire, swailing, or a burn-off. It is a prescribed fire because it is intentionally set to restore a prairie, or to abate greenhouse gas effect. It could also be for the purpose of forest management.
Prescribed burn fires are beneficial because the reduce shrubs, trees and grasses that can start and feed wild fires. They also encourage growth of native vegetation
A wave with a height of 5 feet and a wavelength of 15 feet has a wave base of___.
A. 7.5 Feet
B. 6 Feet
C. 12 Feet
D. 3 Feet
A wave with a height of 5 feet and a wavelength of 15 feet has a wave base of 7.5 feet.
A. 7.5 feet
Explanation:
Wave base defines the depth of the water when it is in still condition.
Wave base is half of wavelength.
Wave base = wavelength/2
Given,
Wavelength = 15 feet
So, wave base = 15 feet/2 = 7.5 feet
When the wave height is divided by wavelength then it gives the steepness of the wave.
Therefore, the wave base is 7.5feet.
What is the relationship between mutation, the cell cycle, and cancer? Select all statements that apply.
A. Mutated genes typically allow cells to respond to checkpoint proteins that hat the cell cycle, thus avoiding formation of tumors.
B. As a result of unregulated cells, cells may become cancerous, meaning that the cells grow and divide uncontrollably.
C. Cancerous cells may form malignant tumors that invade and destroy surrounding healthy tissue.
D. Mutated, defected genes may cause cells to become unable to respond to signals that regulate the cell cycle.
Final answer:
Mutation, the cell cycle, and cancer are closely linked since mutations in genes controlling the cell cycle can cause unregulated cell division and lead to the formation of tumors. Specifically, such mutations can disrupt cell cycle checkpoints and create non-functional regulatory proteins, leading to cancerous growth.
Explanation:
The relationship between mutation, the cell cycle, and cancer is crucial to understand the development of cancerous cells. To address the statements provided:
B. As a result of unregulated cell cycle, cells may become cancerous, which means the cells grow and divide uncontrollably.C. Cancerous cells can form malignant tumors that have the potential to invade and destroy surrounding healthy tissue. D. Mutations in genes may lead to cells becoming unable to respond to signals that regulate the cell cycle, contributing to uncontrolled growth.The mutation of genes involved in the cell cycle can lead to the production of non-functional proteins, disrupting cell cycle control and potentially leading to the formation of tumors due to uncontrolled cell division. This loss of regulation can cause cells to bypass the mechanisms that would typically halt their division, allowing them to proliferate and potentially form cancerous growths.
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Hemophilia is a sex-linked genetic disease that is recessive. A mother is healthy and is a CARRIER (heterozygous) for the trait. A father is healthy as well. Using the info below explain how they could have a child with Hemophilia. What would the gender of the child be?
Mom: XHXh. Dad: XH Y
Answer:
The gene that causes hemophilia is passed from parent to child. A mother that carries the gene is called a carrier, and she has a 50% chance of having a son with hemophilia and a 50% chance of having a daughter who is also a carrier.
Explanation:
What might cause your soil to look like that?
Why is it better to describe ion formation as a “transfer of electrons” rather than as “losing and gaining” electrons?
Explanation:
This is because the atom that ’donate’ the electrons and the one that ‘accepts’ the electrons – to become ions – will share an electrostatic association and form an ionic bond. So in reality, the atoms are only transferring electrons between themselves rather than “losing and gaining” electrons. When the ionic bonds are broken, such as in chemical reactions, the atoms go back to neutral (regain their electrons) and form new associations with other atoms to form new compounds.
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It is better to describe ion formation as a transfer of electrons rather than ''gaining and losing'' electrons because;
An atom becomes a cation after losing an electron to another atom while the atom gaining the electron becomes anion.
Usually, atoms could gain or lose electrons when they react with other atoms or chemical species.Now, when an atom loses an electron as a result of its' reaction with another element or chemical specie, the lost electron is transferred to the other atom it is reacting with.Thus, one atom is gaining an electron while another is losing that electron. And when there is this type of losing and gaining of electrons, it is called transfer of electrons because because the two atoms having this electron transfer relationship will form an ionic bond after the transfer.Thus, since the two atoms form an ionic bond by formation of an ion, we can't say they are just losing and gaining electrons because that process leads to the formation of an ion and it is transfer of electrons that causes formation of ion.Read more at; https://brainly.com/question/15352211
PLEASE HELP! ASSIGNMENT DUE TODAY
Answer the following prompts in complete sentences, using the rubric below to guide your thoughts. Be sure to include supporting details to back up your responses. Also, be sure to use proper grammar, spelling, and punctuation as well as include any resources you use.
Need a graphic organizer? Click Here (Links to an external site.)
Describe the characteristics of a stable society (30 points).
Explain the relationship between energy and economic development (30 points).
Explain some of the benefits of biotechnology (30 points).
Citing sources (10 points)
Answer:
A stable society starts with every member of the society having the basic four rights for each and every individual member of the society: 1) Protection of life 2) Protection of property and honour, 3) Freedom of speech as long as it does not endanger the first two protections, and 4) Access to healthcare and education.
Due to the strong positive correlation between energy and economic growth, any negative shocks to energy, such as a rise in energy prices or the impact of energy conservation policies, will have a negative impact on GDP. If there is insufficient energy relative to demand, it will lead to a fall in GDP.
Better tasting fruits or vegetables.
Fruits and vegetables that retain their flavor and texture longer.
Fruits, vegetables, grains or oils which enhance health.
Explanation:
Answer:
b
Explanation:
What ecological conditions caused the similarities in the body plan of these animals?
Answer:
i don't really know the condition but I think as animals Begin to migrate from one place to the other either by wind flooding and others the tend to adapt to the new environment where by somy features in them changes in other to adapt to the new area
The different species of dinosaurs have evolved through time due to changes in the climatic conditions. And, two species which have evolved from same ancestor show more similarity than two individuals which have evolved from different ancestors.
What is Evolution?Evolution can be defined as the change in heritable characteristics of different populations over the period of successive generations.
The available evidence show that severe changes in the environmental conditions such as the intense volcanic eruptions and rapid climate change supported evolution of the species.
Homologous structures which have evolved from the same ancestor but these structures show certain level of difference due to changes in the habitats. These organisms which evolved from same ancestor show more similarity than the organisms which evolve from different ancestors.
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3. Jill is blood Type O. She has two older brothers with blood types A & B. What are the genotypes of
her parents with respect to this trait?
Answer:
AB & O
Explanation:
Answer: The possible blood types of the parents are A and B
Explanation: A child inherits one gene from each parent. Blood type A can exist as AO while B can exist as BO because every gene that control a particular feature or traits occurs in pair. There when two individuals with blood types A and B, the possible blood types of the offsprings are AB, A, B, and O.
Based on the article "Will the real atomic model please
stand up?" describe one major change that occurred in
the development of the modem atomic model,
Answer:
The one major change that occurred was the placement and organization of the electron. Rutherford's model identified that the electrons were at a distance from the nucleus, Bohr's model identified that the electrons occurred at levels that related to their available energy, and the modern atomic model shows that electrons are located in a predicted area but cannot be identified in a specific point.
Explanation: Sample Responsewhat type of molecule is estrogen made of
Answer:
Explanation: Estrogen are steroid hormones which are made up of special molecules with a four ringed carbon atom back bone. A series of chemical reaction occurs spurred by an enzyme which removes and add groups to cholesterol core. This action transforms it into pregnenolone and then into androgens, then special aromatase enzyme convert androgen into estrogen.
What is an example of the effect of environmental factors on cell differentiation?
Answer:
Environmental factors can alter gene expression, cell signalling and cell differentiation.
Explanation:
Environmental factors can change, stop or disrupt the process of cell signalling and gene expression in organisms. The environmental factors are drugs, chemicals, temperature, etc. With the effect of environmental factors, the organism will try to adapt to the environment by changing the internal process. In case of adaptation, some organism may survive to the changing environment but there is a risk of exhibiting defects and in some case, the result can be death.Final answer:
Environmental factors can impact cell differentiation during fetal development, leading to different gene expression patterns and cell types in the body.
Explanation:
Environmental factors can have significant effects on cell differentiation. For example, during fetal development, if a mother faces famine or infections, the fetus will receive different environmental signals compared to a fetus that receives appropriate nutrition and avoids infections. These environmental signals can lead to different gene expression patterns and ultimately result in different cell types and structures in the body.
Which statement(s) correctly compare the masses of protons, neutrons, and electrons? Check all that apply.
Protons and neutrons have similar mass.
Protons and electrons have similar mass.
Neutrons and electrons have similar mass.
Protons are smaller than a neutron or an electron.
Neutrons are smaller than a proton or an electron.
Electrons are smaller than a proton or a neutron.
Answer:
Protons and neutrons have similar mass.
Electrons are smaller than a proton or a neutron.
Explanation:
Protons and neutrons have approximately the same mass, but they are both much more massive than electrons
Answer:
Protons and neutrons have similar mass and electrons are smaller then a proton or a neutron
Explanation:
1. Describe what would happen if an organ in your specific organ system stopped working.
(Respiratory System)
If an organ in your specific organ system stopped working. then the other organs will try to rectify the issue and attempt to make a balance state known as homeostasis.
Explanation:
The organs are the important things that make up the functioning of an organ system. Every organ system in the human body are inter dependent on each other's function. For example circulatory system and the respiratory system. If the organs of an organ system fails, then the other organs will try to match the particular organ's function thereby reaching a state of balance.
This process of getting a state of being balanced in a human body human body is called homeostasis. The important organs for respiratory system includes larynx, pharynx, nose, lungs, bronchi and trachea. When there occurs a failure of one organ occurs the other organs will try to do the function to reach a balance within the organ system.
Sample Response: The brain, through the nervous system, sends signals to the muscular system, causing the muscles to move rapidly. This rapid motion produces heat in the body and is observed as shivering. The brain also sends signals to the muscles right beneath the skin. These muscles shorten and tighten, causing the hairs on the skin to stand up. When the hairs stand up, heat is kept in the air trapped within the hairs, which keeps the body warm.
Question 4 (2 points)
Choose the true answer(s) from the choices below that best describe magnetic force.
Question 4 options:
A)
Magnetic force is generated by moving electrical charges or aligned atoms.
B)
Magnetic force is a contact force that can hold objects together.
C)
Magnetic force is a contact force that can act at a distance.
D)
Magnetic force can act at a distance to attract objects to each other.
Magnetic force is generated by moving electrical charge.
Magnetic force can act at a distance to attract objects to each other.
Explanation:
Magnetic force is a non-contact force that is generated by motion of charged particles or alligned atoms.
The objects that generate the Magnetic force are called magnets.
The region around the magnets where the effect of magnetic force is felt is called the magnetic field of the magnet.
Magnetic force can be attractive or repulsive.
When like poles come together the magnectic force between them behaves as a repulsive force.
When unlike poles are brought together the magnetic force between them is attractive force.
When uncharged magnetic material is brought near a magnet the magnetic force behaves as an attractive force.
When a bond forms between units of a macromolecule, a water molecule is lost. What is this process called?
Answer:The correct answer will be dehydration synthesis.
Explanation: Dehydration reaction is the formation of larger molecules by the removal or loss of water molecule. It is a subset of condensation reactions in which two functional groups combine toform a covalent bond releasing water molecule as by-product.
Can someone please write a 250-word essay about one of these systems
Digestive system
Respiratory system
Muscular and skeletal systems
Nervous system
Endocrine system
Reproductive system
Excretory system
Immune and lymph systems
Cardiovascular system
Muscular and skeletal systems:
Muscular systems:
Muscular systems are systems that involves three major muscles in its system which are described below,
Skeletal muscleCardiac muscleSmooth muscleThe functions of these three muscles are together makes the muscular system.
Skeletal muscle:
The skeletal muscles are like other striated muscles which are majorly composed of muscle fibers containing the myofibrils, which are majorly composed of sarcomeres.They are majorly involved in supporting the bones and the movement of human body.There are around 639 skeletal muscles in the entire body of a human being.Cardiac muscle:
Cardiac muscle are involuntary muscles that are found near the heart. They are controlled by the sinus node.Smooth muscle:
Smooth muscle are muscle that are found around the walls of organs such as intestines and stomach. They function automatically without any awareness.Thus these three are the major muscles that put up together muscular system and there play a major role in various body functions such as Mobility, posture, stability and other related functions.Skeletal system:
Skeletal muscles are voluntary muscles that support the skeleton and helps in moving the bones. These skeletal muscles gets contracted due to some reactions which inturn causes movement in the body and hence it is helpful in the functioning of body movement.Their other functions involve nutrition and temperature regulation.Both muscular and skeletal systems play a major role in the functioning of the human body and act as the prominent system that is necessary for a healthy human body.
Which part of an electric circuit resists the flow of charge when it changes electrical energy into other forms of energy?
A. battery
B. copper wires
C. switch
D. light bulb
Answer:
D. light bulb is the most appropriate answer
Explanation:
In an electric circut, presence of light bulb would convert the electric energy (flow of electrons) into light energy (photons). It will also resist the flow because to glow a bulb, electric energy will be required. This principle is also applied to all home based appliances where electric energy is used for several purposes.
Up to some extent, flow of electric energy in copper wires will also result in the loss of energy in the form of heat which is due to natural resistance of metal atoms.
Some snakes have special sensory organs that detect the infrared region of the electromagnetic spectrum. Compared with human vision, these snakes can sense electromagnetic waves that have
These snakes can sense electromagnetic waves that have A lower frequency and a longer wavelength
Explanation:
In the electromagnetic spectrum, infrared waves have a lower frequency and higher wavelength than visible light. They proceed visible light on the spectrum.
Ultraviolet waves, on the other hand, have higher frequency and smaller wavelength and precede visible light on the spectrum order.
Answer:
C
Explanation:
What kind of energy does the TV have
Electrical Energy is used by Televisions.
The image shows a map of Easter Island, located in the Pacific Ocean. Which major feature is missing from the map?
Answer:D
Explanation:
Answer:
the answer is D.compass rose
Explanation:
This species of bacteria accounts for 12%-15% of all infant meningitis cases. It can grow at low temperatures, making the storage of leftover baby food and bottles especially dangerous.
The bacterial species, Listeria monocytogenes, accounts for 12%-15% of infant meningitis cases.
Explanation:
Listeria monocytogenes is a group B strep gram-negative bacteria, one of the main causes of meningitis.
This species is psychrotrophic in nature which means that it can grow at low temperatures like refrigerator temperature and mostly found in areas with a temperature around 15-20 degrees Celsius.
These organisms also become psychrotolerant or psychrophiles and can grow at places where the temperature fluctuates.
This is the main reason for the spoilage of food stored in a refrigerator. So leftover baby foods, bottles stored in a refrigerator can be contaminated with these species.
When the infants ingest the contaminated food or use the bottle, they also get infected. Listeria monocytogenes cause meningitis in infants especially who are immunocompromised infants.
If a person adds benzidene to cells grown in a test tube. Within minutes, she see’s the cells energy level fall and the metabolism in the cell comes to a stop. Which organelle does benzidene act upon?
A. Nucleus
B. Mitochondria
C. Endoplasmic Reticulum
D. Ribosome
Answer:
B. Mitochondria
Explanation:
Mitochondria are known as the power house of the cell. They are the sites of cellular respiration that breaks down glucose into energy molecules such as ATP and energy storage molecules such as NADH and FADH2.In this scenario, since the cell's energy levels fall and metabolism ceases, the organelle most likely affected is the mitochondria.If mitochondria are affected, glucose will not be metabolized to ATP and the cell will not have sufficient energy for cellular functions.what color of visible light do green plant leaves absorb the most
A.Green and red
B.Green and violet
C.Red and blue
D.Blue and green
Answer: it is c red and blue
Explanation: