Option B is correct.
B. shared; atoms
Explanation:A covalent bond, also called a molecular bond, is a chemical bond that involves the sharing of electron pairs between atoms. These electron pairs are known as shared pairs or bonding pairs, and the stable balance of attractive and repulsive forces between atoms, when they share electrons, is known as covalent bonding.
Answer:
B. shared; atoms
Explanation:
Covalent bond is formed by sharing of electrons between two atoms. In this way full outer shell is achieved by both the atoms. Since there is no gain or loss of electrons, no ions are formed in the process.
It is usually formed between the atoms of similar electronegativity. It can be of many types like sigma bond, pi bond etc. If a pair of electrons is shared, it's a single bond. If two pairs are shared, it's a double bond and if three pairs are shared, it's a triple bond.
A biologist examines a single-celled organism isolated from a hot spring. The organism is a photosynthetic halophile that uses the pigment bacteriorhodopsin. In which kingdom should the biologist classify the organism?A. BacteriaB. ProtistaC. FungiD. Archaea
Answer:
(D). Archaea.
Explanation:
Archaea are single-celled, prokaryotic organisms that can survive in extreme conditions. Archaea that live in environments with extreme salt concentrations are known as halophiles.
Archaea use bacteriorhodopsin, a protein which helps in photosynthesis. It helps in capturing energy from light and converts it into chemical energy in the form of ATP molecules.
Thus, the correct answer is 'option (D).'
Explain why an ecological pyramid can be used to illustrate energy flow from one trophic level to the next in an ecosystem.
An ecological pyramid refers to a graphical demonstration created to show the bioproductivity or biomass at each of the trophic levels in a given ecosystem. The energy pyramids initiate with the producers like plants at the bottom and advance via the various trophic levels, the highest level is the top of the food chain.
A pyramid of productivity is generally more beneficial, demonstrating the turnover or production of biomass at each trophic level. Rather than demonstrating a single snapshot in time, productivity pyramids demonstrate the energy flow via the food chain.
When energy flows to the next trophic level, generally only 10 percent of it is used to construct new biomass, turning into stored energy. In the pyramid of productivity, each step will be 10 percent of the size of the previous step.
How do chloroplasts get energy from sunlight?
When the energy from the Sun hits a chloroplast and the chlorophyll molecules, light energy is converted into the chemical energy. Plants use water, carbon dioxide, and sunlight to produce the free energy stored in ATP and NADPH through a process called photosynthesis.
Chloroplasts in plant cells get energy from sunlight through a process called photosynthesis. This process involves the absorption of light energy that excites electrons in a molecule called chlorophyll, triggering reactions which convert carbon dioxide and water into glucose - a form of energy cells can use.
Explanation:
Chloroplasts are organelles in plant cells that carry out a process called photosynthesis to get energy from sunlight. The process begins when the chloroplast absorbs light energy from the sun. This energy excites electrons within a molecule in the chloroplast called a chlorophyll. The excited electrons then initiate a series of reactions which result in the conversion of carbon dioxide and water into glucose and oxygen. Glucose is then used as an energy source by the plant. In essence, photosynthesis converts energy from the sun into chemical energy that cells can use.
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why would defective collagen proteins affect an individual's joints
Because the collagen provides support and elasticity to connective tissue, such as cartilage, bones, tendons and ligaments.
Explanation:A defective collagen proteins means no elasticity and support in joint.That's why it is important to joints.The most abundant protein found in your body is collagen.Collagen is the largest protein in a human body, made up of thousand amino acids. It builds connective tissues through out the body to support joints, muscles and to rejuvenate the skin.
Some connective tissue diseases and other diseases, mainly because of a weak immune system, can cause the collagen to degenerate. One of them is rheumatoid arthritis which affects the joints, causing pain, swelling and stiffness in the joints.
Collagen is said to stimulate the growth of new cartilage, which is a thin tissue enveloping the joints. However, cartilage is dependent on collagen so when the body lacks collagen, it causes pain, stiffness and instability of the joints.
Which structure would be most beneficial for a plant in tundra biome
The structure would be most advantageous for a plant in tundra biome should be superficial roots that do not reach the frozen soil
The tundra is recognized for its shortage of trees. The short summer period results in a compressed growing season, which makes it challenging for trees to grow longer. The cold temperature of the permafrost also introduces slower decomposition, which limits the number of nutrients being recycled through the atmosphere.
Answer:
B
Explanation:
shallow roots that do not reach the frozen soil
Students ask if convection currents are strong enough to move heavy objects. They use a fish tank and a toy boat that floats. Then they place the boat in the tank and watch it for 10 minutes. It doesn’t move. Next they put a hot plate under one side of the fish tank and turn it on. They watch for a half hour, and at the end of that time, the boat has moved across the aquarium away from the heat. What is a flaw in the experimental design of this experiment? Question 14 options: The toy boat should have enough weight to sink. The hot plate should have been used in the first test. The fish tank should have been filled with different liquids. The amount of time should have been the same for both tests.
They should have had the same time for both.
Label the steps of transcription in order, beginning with step one. Free RNA nucleotides pair with the complementary DNA nucleotides on one strand of DNA. The mRNA molecule breaks away as the DNA strands rejoin. RNA polymerase unzips the DNA molecule.
1. RNA polymerase unzips DNA
2. Free RNA nucleotides pair with complementary DNA nucleotides
3. The mRNA molecule breaks away as the DNA strands rejoin.
Hope this helps!
1. step two
2. step three
3. step one
only 10 percent of the energy stored in an organism can be passed on to the next trophic level. Of the remaining energy, some is used for the organism's life process, and the rest is...
A) Used in reproduction
B) Stored as body tissue
C) Stored as fat
D) Eliminated as heat
The answer is eliminated as heat.
Metabolism is the set of life-sustaining chemical reactions in organisms. The three main purposes of metabolism are the conversion of food/fuel to energy to run cellular processes, the conversion of food/fuel to building blocks for proteins, lipids, nucleic acids, and some carbohydrates, and the elimination of nitrogenous wastes.
what is the part of a man that produces sperm
the private area of a man produces sperm
Bone marrow is a soft, spongy, connective tissue found inside bones. Bone marrow contains stem cells, which can generate new blood cells and, therefore, can treat many diseases of the blood. In the past, extracting bone marrow from a donor required anesthesia and a long, large needle. The process often discouraged people from signing up to be donors. A process called apheresis has made the process much less painful and invasive. In apheresis, the donor's blood passes through a sterile line into the machine. Once the blood is inside the machine, the bone marrow stem cells are extracted, and the remaining blood is returned to the donor. Donors typically only experience minor discomfort from the needles used and the loss of electrolytes. Describe how you think this advance in biotechnology will affect individuals and society. Be sure to include any potential medical or ethical issues that could arise from this new practice.
In my opinion, the progression in biotechnology will influence the people and society in a positive manner. The donors will assist in saving lives, and those who get the donations will be in better help. An ethical problem is that some of the individuals would not encourage the procedure as it is not morally right.
Some may even refuse to accept the transplant, if it goes against their beliefs, in spite of their life being in threat. The medical complications comprise the transfer of probable diseases. If the donor exhibit pathogens of which the body of the patient has not fought yet, then they can come in contact with the diseases. However, in case if the immune system of the recipient is weakened, then it is easier for the patient to get in contact with the diseases.
Answer:
the progression in biotechnology will influence the people and society in a positive manner. The donors will assist in saving lives, and those who get the donations will be in better help. An ethical problem is that some of the individuals would not encourage the procedure as it is not morally right.
Explanation:
Which characteristics describe the troposphere? Check all that apply. is the innermost later, contains the ozone layer, has the highest air pressure, spans 12-50 km above Earth, is a good place for planes to fly
The correct answers are:
- is the innermost layer;
The troposphere is the first layer of the Earth's atmosphere, thus it is the innermost one of all. This is the layer which enables life on our planet, and its composition is just the right one that life on Earth can thrive.
- has the highest air pressure;
Because this layer has the biggest density of all layers, which practically means that it has the most molecules per area, so it is the richest with gasses, this layer has the highest air pressure. The more gasses there are in a layer, the heavier it is, thus it has bigger air pressure.
The troposphere is the innermost layer of Earth's atmosphere, extends about 12 km above the surface, and contains the highest air pressure of all atmospheric layers. It is a suitable place for planes to fly but does not contain the ozone layer.
The troposphere is the innermost layer of the Earth's atmosphere, extending approximately 12 km above the Earth's surface, though it can vary depending on the location and the season. Therefore, the statements indicating it as the innermost layer and its span are correct. The troposphere is also characterized by having the highest air pressure compared to other atmospheric layers. However, the ozone layer is not located in the troposphere, but in the stratosphere, the layer above the troposphere. Finally, the troposphere is indeed a suitable place for planes to fly due to stable weather conditions and lower altitude.
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Which best blocks X-ray particles and can therefore be observed more closely through the use of this technology
Answer;
Bones
Explanation;
The x-ray particles pass through the body. Structures that are dense such as bone will block most of the x-ray particles.
Different parts of the body absorb the x-rays in varying degrees. Dense bone absorbs much of the radiation while soft tissue, such as muscle, fat and organs, allow more of the x-rays to pass through them. As a result, bones appear white on the x-ray, soft tissue shows up in shades of gray and air appears black.
Answer:
Bones
Explanation:
bones
A farmer wants to reduce the need for pesticides at his farm. What should he do?
A. Practice conservation tillage.
B. Use beneficial insects.
C. Plant grass.
D. Plant trees.
E. Use buffer strips.
Answer:
B.)
Explanation:
To reduce pesticide use on a farm, incorporating b) beneficial insects for biological control and implementing conservation tillage and buffer strips can be effective strategies.
To reduce the need for pesticides on his farm, a farmer can employ several methods. Integration of b) beneficial insects is one practice which allows farmers to naturally manage pest populations by using organisms that prey upon and destroy pest species. This is known as biological control and is effective at maintaining lower levels of pests without harming beneficial species. Additionally, conservation tillage can be used to minimize soil disturbance and reduce erosion, while leaving crop residue that may sometimes provide habitat for pests, so it must be managed carefully. Planting buffer strips of grass or trees around fields can also be an effective way to prevent pesticide drift and provide habitats for natural pest enemies.
While conservation tillage and planting certain vegetation can contribute to overall farm health, using biological control through beneficial insects specifically targets the reduction of pests without the need for chemical pesticides.
Strawberry plants typically reproduce by making runners, which are miniature versions of themselves, that grow off of the roots and stems of the parent. This type of vegetative reproduction is known as
The asexual vegetative method be used by strawberries is called 'runners'
Answer:
vegetative propogation
Explanation:
Vegetative propagation or vegetative reproduction is the growth and development of a plant by asexual means. This development occurs as a result of fragmentation of a part of the plant or the growth of specialized vegetative parts. Vegetative propagation involves reproduction through vegetative (non-sexual) structures, while sexual propagation is accomplished through gamete production and fertilization.
An example of this can be seen in the question above, where strawberry plants usually reproduce by making corridors, which are miniature versions of themselves, that grow from their parents' roots and stems.
Which events contributed to life evolving on Earth? Check all that apply.
Largely, the rise in oxygen in our atmosphere allowed for life to grow and survive.
Significant events that contributed to the evolution of life on Earth include oxygenation of the atmosphere, mass extinctions, climate and geographic changes, and natural selection, which all played roles in creating the conditions for diverse life forms to emerge and evolve.
The evolution of life on Earth has been shaped by various planetary events. Among these, significant contributors to the evolution of life include the oxygenation of the atmosphere, which created conditions suitable for the evolution of aerobic organisms and subsequently eukaryotes. Planet-wide changes such as mass extinctions, caused by events like asteroid impacts, have dramatically reshaped life by wiping out dominant species and allowing others to flourish, leading to an increase in diversity. Further, changes in climate and geography have played a critical role in life's evolution, as seen during periods like the Cambrian explosion which led to a rapid diversification in life forms. The ongoing process of natural selection also continually influences the trajectory of evolution as species adapt to their changing environments.
How does sexual reproduction increase the genetic diversity among a population
In my opinion I feel that because when two human beings create another they share their genes with the new human being. As that human grows up it does the same thing. It's known as a cycle. I'm guess that there will be a time where two healthy people will decide to reproduce and will create a healthy baby. Although I'm not all sure.
I hope I explained well enough. xD
~Noodles~
Sexual reproduction increases genetic diversity due to crossing over and independent assortment during meiosis, creating new combinations of traits in offspring.
Explanation:Sexual reproduction greatly contributes to genetic diversity among a population. This is mainly due to two biological processes: crossing over and independent assortment.Crossing over is a process that occurs during meiosis, where sections of DNA are exchanged between two chromosomes. This process creates new combinations of genes, increasing the variety of traits within the offspring.
Independent assortment also happens during meiosis, it refers to the random assortment of chromosomes during the formation of sex cells or gametes. This further increases the possible number of gene combinations in the offspring.
These mechanisms, combined with the natural process of mutation, contribute to the high levels of genetic diversity that are achieved through sexual reproduction.
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The plasma membrane is composed of a phospholipid bilayer with embedded proteins. What is one of the functions of the embedded proteins? A. protecting the cell from physical harm B. defining the cell's structure and shape C. preventing the phospholipid tails from binding together D. allowing specific substances to flow into the cell
the correct answer is
D
The plasma membrane is composed of a phospholipid bilayer with embedded proteins. The function is allowing specific substances to flow into the cell.
The function of the plasma membraneThe plasma membrane is a fundamental structure surrounding all biological cells, composed of a phospholipid bilayer with embedded proteins. It serves as a selectively permeable barrier, regulating the passage of substances into and out of the cell. Additionally, the membrane plays a role in cell identity and recognition through its glycoproteins and glycolipids, facilitating essential cellular functions and interactions.
Embedded proteins in the plasma membrane play a crucial role in regulating the passage of substances into and out of the cell. They act as transport proteins, channels, and receptors, allowing specific molecules and ions to enter or exit the cell, and they are essential for various cellular processes such as nutrient uptake, signal transduction, and communication with the external environment.
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Since ribosomes are found in bacterial cells, do ribosomes have a membrane around them? Why or why not?
No. Ribosomes do not have a membrane. They are composed of 2 subunits - the small subunit is where the mRNA is read and the large subunit is where the amino acids are joined together to form the polypeptide (protein) - a membrane would interfere with this process. Plus, ribosomes are in both eukaryotes and prokaryotes - and prokaryotes have NO membrane bound organelles.
Ribosomes do not have a membrane around them because they are free structures that just float through the cell's cytoplasm.
Ribosomes are referred to as the macromolecular machines that are found in the cells of organisms. The main function of ribosomes is to perform protein synthesis.Ribosomes are also important for the formation of peptide bonds. Ribosomes do not have membranes despite the fact that they're bound by membranes. Each ribosome is made from two sub-units.Due to the fact that they don't have membranes, they can't pick up translatational RNA that are released.In conclusion, ribosomes do not have a membrane around them.
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Which of the following is relatively constant in an ecosystem? More than one answer may be correct!
A. Number of Organisms
B. Amount of Matter
C. Number of Species
Im pretty sure its
A. Number of Organisms
B. Amount of Matter
A million sorrys if im wrong :(
In sickle-cell disease, an allele produces red blood cells with an abnormal shape, which affects many other traits in the same individual. What genetic behavior does this describe?
pleiotropy
hope this helps :)
Answer:
The correct answer is pleiotropy.
Explanation:
The kinds of genes that affect and influence more than one character or trait are known as the pleiotropic genes. This phenomenon is known as pleiotropy or pleiotropism. An illustration of pleiotropy is sickle cell disease or sickle cell anemia. In a specific homozygous condition that is, HbS and HbS, the gene for sickle-cell anemia is lethal, while the generation of sickle cell trait occurs in heterozygous condition, that is, HbA and HbS.
List the three spheres of the earth
lithosphere (land), hydrosphere (water), biosphere (living things) hope this helps
PLZ 25 POINST WILL VOTE BRAINLIEST whats the difference and similarities between rocks and minerals fill out the Venn diagram
rocks are solid
rocks are made up of sand
rocks have more mass
minerals are loose
minerals are grainy
minerals have little mass
Which one not part of nitrogen cycle ?
Option C is correct
All of the options are the part of nitrogen cycle except C.
Explanation:The nitrogen cycle is the biogeochemical cycle by which nitrogen is converted into multiple chemical forms as it circulates among atmosphere, terrestrial, and marine ecosystems. The conversion of nitrogen can be carried out through both biological and physical processes.
Answer: Phosphate is not the part of nitrogen cycle. Option C is correct. Nitrogen cycle consist of four parts :
1)Assimilation
2)Ammonification
3) dentrification
4) nitrification
Nitrogen cycle is also known as biogeochemical cycle . In nitrogen cycle conversion of nitrogen take place into a multiple forms . The conversion take place with the help of chemical and physical process.
Which statements about eclipses are true? CHECK ALL THAT APPLY.
-Earth’s shadow creates a solar eclipse.
-A total lunar eclipse has a reddish color.
-The moon moves between Earth and the Sun during a solar eclipse.
-A lunar eclipse occurs during a full moon.
-During a partial solar eclipse, half of the moon is covered by Earth.
-A solar eclipse occurs during a full moon.
The statements about eclipses which are true includes:
B. A total lunar eclipse has a reddish color.
C. The moon moves between Earth and the Sun during a solar eclipse.
D. A lunar eclipse occurs during a full moon.
An eclipse can be defined as an astronomical event that occurs when one celestial body in space gets between another celestial body and the Sun, leading to the total or partial obscuration (blocking) of light.
In Science, there are two (2) primary types of eclipse and these include;
Solar eclipse: it is an astronomical phenomenon that occurs when the Sun is obscured by the Moon and engulfing a portion of the Earth.Lunar eclipse: it is an astronomical phenomenon that occurs when the Earth comes between the Moon and the Sun thereby causing it to cover the Moon with its shadow.In conclusion, the following statements about eclipses are true;
I. The color of a total lunar eclipse is reddish.
II. During a solar eclipse, the Moon moves between Earth and the Sun.
III. A lunar eclipse typically occurs when there is a full Moon.
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Answer:
BCD
Explanation:
Edge 2023
Which statement about biomes is true? A. Different biomes share similar plants and wildlife. B. Each biome has only one ecosystem. C. There are only three biomes on the Earth. D. Biomes are determined by climate zones.
D is the correct answer.
Answer: D. Biomes are determined by climate zones.
Explanation:
A biome is a community of animals, plants and other living organisms. The organisms living in a particular biome acquire the adaptations according to the climatic conditions of the region. In other words, the type of biome is affected by the climatic conditions of the region. For example a region which receives very low annual rainfall, with dry and hot climatic condition will result in a desert biome.
On the basis of the above explanation, D. Biomes are determined by climate zones. is the correct option.
Someone help me please
what chapter is it? and do you have a vocab sheet that goes with this?
What holds the chromatids together
Cohesin is a protein complex that regulates the separation of sister chromatids during cell division, either mitosis or meiosis. Cohesins hold sister chromatids together after DNA replication until anaphase when removal of cohesin leads to separation of sister chromatids.
The chromatids are held together by the centromere.
Explanation:The chromatids are held together by a structure called the centromere.
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3. You begin with one cell that contains twelve chromosomes. This cell undergoes one mitotic division (you need to know the end result of mitosis to get this answer right). a. How many cells will you end up with after the cell divides? (1 point) b. How many chromosomes will be in each of the cells when the division is complete? (1 point)
After one mitotic division, end result will be two cells.
Explanation:Because mitosis is a cell division that results in two daughter cells each having the same number and kind of chromosomes as the parent nucleus, typical of ordinary tissue growth.
Part 2:There will be 12 chromosomes in each daughter cell.
Explanation:Because number of chromosome remain same (diploid) in mitosis.
Final answer:
Following mitotic division, one would end up with two cells, each containing twelve chromosomes, the same number as the original cell. Mitosis, followed by cytokinesis, ensures genetic consistency and the diploid state is maintained in the daughter cells.
Explanation:
Outcome of Mitotic Cell Division
When a cell containing twelve chromosomes undergoes one mitotic division:
a. Number of Cells: You will end up with two cells after the cell divides.
b. Number of Chromosomes per Cell: Each of the cells when the division is complete will have twelve chromosomes.
Mitosis ensures that each daughter cell receives an identical set of chromosomes to the parent cell. It is a multi-phase process consisting of prophase, metaphase, anaphase, and telophase, followed by cytokinesis. During cytokinesis, the cytoplasm divides to form two genetically identical daughter cells.
Cytokinesis completes the process started by mitosis, where each nucleus has equally separated chromosomes. This results in both daughter cells being genetically identical with a diploid number of chromosomes, identical to the parent cell. This process occurs in all normally dividing cells except germ cells.
In photosynthesis, energy from sunlight is used to rearrange the atoms in carbon dioxide and water to make a sugar called glucose. What other substance is produced by photosynthesis?
is it water
ozone
carbon dioxide or
carbon monoxide
Photosynthesis is the process by which plants, some bacteria and some protistans use the energy from sunlight to produce glucose from carbon dioxide and water. This glucose can be converted into pyruvate which releases adenosine triphosphate (ATP) by cellular respiration. Oxygen is also formed.
Photosynthesis uses sun energy to convert carbon dioxide and water into glucose and oxygen. The additional product of this process, apart from glucose, is oxygen.
Explanation:In the process of photosynthesis, energy from sunlight is used to rearrange the atoms in carbon dioxide and water to produce glucose, a type of sugar. However, glucose is not the only product of photosynthesis. Another substance also comes out of this process: oxygen. According to the general photosynthetic equation 6CO₂ + 6H₂O + light energy --> C6H12O6 + 6O2, six molecules of carbon dioxide (CO2) and six molecules of water (H2O) react under light energy to produce one molecule of glucose (C6H12O6) and six molecules of oxygen (O2). Therefore, the correct answer to your question is Oxygen.
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Which feature enables the nucleus to send and receive information through the nuclear membrane?
Pores, Good luck. :) <3