.pls help fast
Is the fossil record complete for humpback whales? Explain your answer.
Answer:
No, the fossil record is not complete because with further fossil discoveries, and more study, it may continue to tell paleontologists how modern whales came to behave the way they do.
Explanation:
Is It possible for two parents with a round jaw to have a child with a square jaw? Why or Why not
Yeah it's possible. Even though both parents have round jaws... that may be the result of a dominant trait overpowering the recessive trait. As long as both parents have the recessive gene (in other words they're heterozygous traits) then there is a possibility for a child to be born with a square jaw.
How can an organism's genetic traits affect its ability to survive?
Herman's company has adopted a paperless policy. Employees no longer print letters or documents and instead do everything on the computer. Office paper use has dropped by 40% in the last six months. If everyone adopted the same policies, what impact would that have on the environment?
Answer:
There would be a decrease in deforestation, because fewer trees would be cut down for paper.
Explanation:
If everyone reduce the use of papers it will lead to reduce in deforestation.
What is deforestation?Deforestation refers to the loss of forest area worldwide to other uses such as agricultural land, urbanization and mining activities. Deforestation, greatly accelerated by human activities since the 1960s, has adversely affected natural ecosystems, biodiversity and climate.
Several factors, both human and natural, cause deforestation. Natural factors include natural forest fires and diseases caused by parasites that can lead to deforestation. Nevertheless, human activities are one of the main causes of global deforestation.
Therefore, If everyone reduce the use of papers it will lead to reduce in deforestation.
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Elements or compounds that can only be separated or combined to make substances with new properties by means of a chemical reaction.
Answer:
substance
Explanation:
hello hope this helps
What is a volcano?
A. a tall mountain
B. a chemical reaction that produces fire
C. an atmospheric condition
D. an opening in Earth’s crust
Answer:
c
Explanation:
Answer:
D
Explanation:
I hope this is correct and have a great day
why are plant cells undergoing cell division do not have a vacuole? Please answer this question within 1-2 hour/s
Answer:
because they can
Explanation:
The DNA triplets that code for amino acids are common to—
A) humans only
B) plants and animals
C) Prokaryotes
D) all living things
Answer:
i think itz D.)All living things
Explanation:
All of the following are examples of Ilmiting factors in an ecosystem except:
A.) Water
B.) Food
C.) Population density
D.) Space
Answer:
C-Population Density
Explanation:
PLEASE HELP ASAP NOT BIOLOGY JUST SCIENCE PLEASE PLEASE
During the nitrogen cycle, plants take in nitrogen compounds through their BLANK
Answer:
Roots
Explanation:
Answer:
roots
Explanation:
I NEED HELP WITH MY WORK PLZ HELP ME!!!!!! :'(
why do i have sharp chest pain ive had it for 3 days now and now the pain is spreading to my shoulders
Answer:
Um it means your having heart problems
Explanation:
Why is some amount of air is left inside in your lungs after inhalation
Answer: Residual volume (RV) is the volume of air remaining in the lungs after maximum forceful expiration. In other words, it is the volume of air that cannot be expelled, thus causing the alveoli to remain open at all times. The residual volume remains unchanged regardless of the lung volume at which expiration was started. The residual volume (RV) is the amount of air that is left after expiratory reserve volume is exhaled. The lungs are never completely empty: There is always some air left in the lungs after a maximal exhalation.
So your answer will be Residual volume...
Hope this helps........ Stay safe and have a Merry Christmas!!!!!!!!! :D
It is left because exhaling will never remove all air from your lungs, if it did your body would shut down due to lack of oxygen to all organs. It distributed the atoms throughout the body.
Help please this is difficult♂️
Answer:
Gametes from both dogs are needed to maintain the correct number of chromosome in the offspring
Explanation:
Reproduction in dogs is a sexual process. During the process, haploid gametes from both the male and the female (sperm from males and eggs from females) fuse together in a process known as fertilization in order to produce diploid offspring.
The haploid gametes ensure that the offspring produced during fertilization has the correct (diploid) number of offspring. Because the production of gametes involves meiosis and crossing over of genetic materials between chromosomes, offspring produced by sexual reproduction are usually genetically different from one another. The random fusion of gametes further ensures that offspring from the same parents are different from one another.
PLEASE HELP ITS DUE SOON!!! Explain why it is not possible to predict the sex of one individual offspring
list out any four waste materials secreted by human body and describe any two of them?
Answer:
These chemical reactions produce waste products such as carbon dioxide, water, salts, urea and uric acid. Accumulation of these wastes beyond a level inside the body is harmful to the body. The excretory organs remove these wastes. This process of removal of metabolic waste from the body is known as excretion.
Answer:
Thechemical reactions produce waste products such as carbon dioxide, water, salts, urea and uric acid. Accumulation of these wastes beyond a level inside the body is harmful to the body. The excretory organs remove these wastes. This process of removal of metabolic waste from the body is known as excretion.
1 pts
Question 9
Which of the following is NOT true of the image shown below?
3 CO,
ADP
O
ZATP
ADP
NADPH
NADP
3 carbon
simple sugar
The process is light dependent
Which of these is not a human activity that impacts the environment?
A
transportation
B
construction
C
photosynthesis
D
manufacturing
Chemical and Waste Management:
Discuss the packaging of regulated waste for transport.
(Dental Assistant Related Chapter 23)
Answer:
los cupoo
Explanation:
kk
Which best describes the difference between wave A and wave B? O Wave A has a greater pitch and frequency. O Wave B has a greater pitch and frequency. O Wave A has a greater pitch but lower frequency. O Wave B has a lower pitch but greater frequency.
If you are neither relaxing or contracting a specific muscle, what is happening to the amount of ATP that is available in that muscle cell?
A. It is staying the same or increasing.
B. It is decreasing rapidly.
Answer:
A. It is staying the same or increasing.
Explanation:
The body tissues and cells require energy in the form of ATP to work, grow and move. It is produced from cellular processes like ETC, cellular respiration and other metabolic processes.
The amount of ATP in the cell:
Option A. It stays the same or increases.
The function of ATP can be explained as:
Muscle contraction and relaxation requires a certain amount of energy in the form of ATP. The insufficient amount will not be able to support the relaxation or the contraction of the muscle tissues.In the condition where there is no contraction or relaxation the amount of energy will be the same or increased as it is not used in the process and remains constant.Therefore, it remains the same or increases.
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Anaerobic respiration is also known as?
Answer:
Intramolecular respiration
Explanation:
I think sorry if i'm wrong
It is also called as the fermentation. It is the kind of respiration which helps the cells to breakdown energy in the absence of oxygen.
What is the other type of respiration called as ?It is called as the aerobic respiration which takes place in the presence of oxygen.
Anaerobic that stands for without oxygen.This is the method of the cellular respiration where it does not basically require the oxygen in order to generate the energy. For the smaller animals for breathing , here is no enough oxygen present so that they will need energy for surviving in absence of oxygen.
Anaerobic respiration is the process in which the cells just break down into sugars just to produce out energy in the absence of oxygen. The respiration is called as fermentation. it mainly takes place in yeast cells, bacteria, and muscle cells of animals.
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PLEASE HELP ASAP WILL DO 20 POINTS NOW AND WILL ADD MORE 50 LATER IF THE ANSWER IF WHAT IM LOOKING FOR
EXPERIMENT: TISSUE STRUCTURE
OBJECTIVES
Observe different types of cells.
Use the microscope. These supplies and equipment are needed:
prepared slide of muscle tissue
prepared slide of some internal organ such as the kidney, liver, or heart
prepared slide of erythrocytes, or leukocytes (from blood)
Follow these directions and complete the activities.
1. Place one of the prepared slides of animal tissue on the stage of the microscope.
2. Focus the microscope on low power. Then change to the high power objective. Focus on the tissue, and note the cells.
3. On a separate sheet of paper, draw an individual cell that you see in the tissue. Note the shape of the cell and its other distinctive characteristics.
What do you think the function of this cell might be?
4. Repeat Steps 1 and 2 using the other prepared slides.
5. On a separate sheet of paper, draw individual cells from the other prepared slides examined.
What do you think the functions of the other cells drawn might be?
If all of the different kinds of cells which you observed had been taken from the same organism or individual, would they have all had the same genetic information?
Consider specialization: What biological concept or occurrence is demonstrated by the different kinds of cells which were observed?
Why is it important?
Answer:
Its the flagem
Explanation:
Answer: 434 words total. Left two questions blank (they are underlined) so youll probs need to fill it in. I also suggest putting it into your own words so if they run it through a plagerism checker this doesnt pop up. I hope this helps tho.
Introduction:
Cells are the basic building blocks of all living things. The human body is composed of trillions of cells. They provide structure for the body, take in nutrients from food, convert those nutrients into energy, and carry out specialized functions. Cells also contain the body’s hereditary material and can make copies of themselves. Cells have many parts, each with a different function. Some of these parts, called organelles, are specialized structures that perform certain tasks within the cell.
Materials:
• Microscope
• Prepared slide of muscle tissue
• Prepared slide of some internal organ such as the kidney, liver, or heart
• Prepared slide of erythrocytes, or leukocytes (from blood)
Instructions:
1. Place one of the prepared slides of animal tissue on the stage of the microscope.
2. Focus the microscope on low power. Then change to the high-power objective. Focus on the tissue, and note the cells.
3. On a separate sheet of paper, draw an individual cell that you see in the tissue. Note the shape of the cell and its other distinctive characteristics.
-What do you think the function of this cell might be?
4. Repeat Steps 1 and 2 using the other prepared slides.
5. On a separate sheet of paper, draw individual cells from the other prepared slides examined.
Questions:
What do you think the functions of the other cells drawn might be?
- (i think this differs on person to person so may need to do it yourself)
If all of the different kinds of cells which you observed had been taken from the same organism or individual, would they have all had the same genetic information?
- Yes, the cells will have the same genetic information. However, the particular combination of genes that are turned on (expressed) or turned off (repressed) dictates cellular morphology (shape) and function. Essentially meaning that though the cells share the same genetic information they do not necessarily share the same functions.
Consider specialization: What biological concept or occurrence is demonstrated by the different kinds of cells which were observed?
- Though these cells have the same DNA, they all have different phenotypes. The phenotypes are different because the cells appear different under the microscope. The cells do this by expressing different genes at different rates. For example, the blood cell is expressing the gene to make hemoglobulin while the other cells are probably expressing different genes that allow them to be specialized. Cells differentiate which means that they are becoming more specialized. Epigenetics focuses on how cells become more specialized.
Why is it important?
- This is important because it allows different parts of the body to carry out their crucial functions necessary for the whole body to run properly.
DNA is duplicated during a process called
Answer:
DNA replication
Explanation:
pls help, 12 pts and brainliest
Recently, state forests and parks like Yellowstone National Park which contain varieties of flowering trees and shrubs, have started to erect signs that state, Take nothing but pictures, leave nothing but footprints.
Which argument BEST supports why these signs are being placed in state forests and parks?
A
Flowering tree and shrub ecosystems can never fully recover once humans have adversely affected them because organisms in these ecosystems are nonrenewable.
B
Removal of the flowering trees and shrubs will have a direct impact on the ecosystem by increasing the stability.
C
Humans can cause damage to the stability of ecosystems by removing the flowering trees and shrubs.
D
Flowering trees and shrubs make the state forest and parks more attractive and increase the revenue for the parks.
Answer: C.
Explanation:
The signs are placed because humans can cause damage to the stability of ecosystems by removing the flowering trees and shrubs.
Ecosystems are self sustaining units in which there is an exchange of materials and energy within itself. There is need for sustainability in ecosystems to ensure that they continue to survive and ultimately to preserve biodiversity.
The sign; "take nothing but pictures, leave nothing but footprints" placed on state forests and parks like Yellowstone National Park which contain varieties of flowering trees and shrubs are there because humans can cause damage to the stability of ecosystems by removing the flowering trees and shrubs.
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Which of the following blood cell's function is to carry oxygen?
red blood cells
platelets
B
white blood cells
D plasma
Answer:
the red cells are the ones that carry it
Explanation:
1) A region of the country is rapidly growing in population, causing the demand for electricity to go up each year. As a result, a new source of electricity is needed. This particular region of the country has plenty of agriculture, rivers, and access to coal deposits underground. Which of the following would be the cheapest way for this region of the country to make electricity, have minimal impact on the environment, yet not add carbon dioxide to the atmosphere?
Group of answer choices
A)Use the agriculture biomass to generate a renewable fuel that can be burned to generate electricity
B)Use the coal deposits to generate electricity in a few coal fired facilities
C)Build a nuclear power plant in the middle of the region
D)Build dams along the rivers to generate electricity
2)The image provided shows a partial river food web.
The local town relies on this river ecosystem to sustain their population both economically and as a source of food. Using the food web provided, which statement provides the best reasoning for regulating the amount of fish removed from the river by humans.
Group of answer choices
A)Regulation will help the ecosystem to remain balanced and contribute to the stabilization of other populations of river organisms.
B)Regulation will increase the amount of energy transferred from the catfish to the eagle.
C)Regulation will allow contaminated sediments to decrease in the river due the removal of the contamination source.
D)Regulation will ensure that carp will not overpopulate the ecosystem and begin to consume larger organisms like the salmon.
Answer:
The cheapest way for the country to make electricity would be
A) Use the agriculture biomass to generate a renewable fuel that can be burned to generate electricity
The statement provides the best reasoning for regulating the amount of fish removed from the river by humans is:
A) Regulation will help the ecosystem to remain balanced and contribute to the stabilization of other populations of river organisms.
Explanation:
For the electricity, the use of Biomass meets the demands due to the fact that, it has minimal impact on the environment, does not add carbon dioxide to the atmosphere. Also, it is renewable form of energy.
For the regulation of the amount of fish removed from the river helps to maintain the ecosystem balance. If it was not done, the fishes found in the river will be totally harvested thereby disrupting the chains in that river ecosystem.
Identify the types of genetic recombination.
occurs in metaphase I.
occurs during sexual reproduction.
is random chromosome alignment resulting in variation.
occurs in prophase I.
fuses gametes to form offspring with genes from each parent.
exchanges genetic information between non-sister chromatids.
Answer:
Explanation:
The answers to your questions about genetic recombination are:
Independent assortment happens during metaphase I.
Fertilization happens during sexual reproduction.
Independent assortment is random chromosome alignment resulting in variation.
Crossing over happens during prophase I.
Fertilization fuses gametes to form offspring with genes from each parent.
Crossing over is the exchange of genetic information between non-sister chromatids.
Answer:
Independent assortment happens during metaphase I.
Fertilization happens during sexual reproduction.
Independent assortment is random chromosome alignment resulting in variation.
Crossing over happens during prophase I.
Fertilization fuses gametes to form offspring with genes from each parent.
Crossing over is the exchange of genetic information between non-sister chromatids
Explanation:
Just as energy flows through an ecosystem, matter also moves from organism to organism and from organisms to the environment. Using either a kelp forest or a hydrothermal vent ecosystem as an example, explain how carbon can move through the organisms in that ecosystem.
Answer:
Explanation:
Energy is transferred through an ecosystem in steps, making up a food chain or a food web. At the bottom of the chain are the primary producers, which absorb sunlight and use the light energy to convert carbon dioxide and water into carbohydrates (long chains of sugar molecules) and eventually into other biochemical molecules, by photosynthesis.
The primary producers support the consumers—organisms that ingest other organisms as their food source. Finally, decomposers feed on decaying organic matter, from all levels of the web. Decomposers are largely microscopic organisms (microorganisms) and bacteria.
The food web is really an energy flow system, tracing the path of solar energy through the ecosystem. Solar energy is absorbed by the primary producers and stored in the chemical products of photosynthesis. As these organisms are eaten and digested by consumers, chemical energy is released. This chemical energy is used to power new biochemical reactions, which again produce stored chemical energy in the consumers' bodies.
Energy is lost at each level in the food web through respiration. You can think of this lost energy as fuel burned to keep the organism operating. Energy expended in respiration is ultimately lost as waste heat and cannot be stored for use by other organisms higher up in the food chain. This means that, generally, both the numbers of organisms and their total amount of living tissue must decrease greatly up the food chain. In general, only 10 to 50 percent of the energy stored in organic matter at one level can be passed up the chain to the next level. Normally, there are about four levels of consumers.
A food chain or a food web is made up of the stages through which energy is moved across an ecosystem. The primary producers are found at the bottom of the food chain.
What is food chain?By photosynthesis, they transform carbon dioxide and water into carbohydrates (long chains of sugar molecules) and ultimately into other biological compounds.
The consumers are organisms that consume other organisms as food—are supported by the primary producers. Decomposers, who feed on decaying organic materials from all tiers of the web, are the last group. The majority of decomposers are bacteria and tiny organisms.
The food web actually follows the route of solar energy through the environment and is a system of energy flow.
Therefore, A food chain or a food web is made up of the stages through which energy is moved across an ecosystem. The primary producers are found at the bottom of the food chain.
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Drag the tiles to the correct boxes to complete the pairs.
Match the phases in the cell cycle to the events that occur in each phase.
interphase
mitosis
cytokinesis
the nucleus divides
the cytoplasm divides
the DNA replicates
Answer:
Interpase: the DNA replicates
Mitosis: the nucleses dishes
Cytokensis: Cytoplasam dishes
Explanation:
PLATO GANG WASSUP
The first phase is interphase, during which the nucleus divides and the DNA replicates. The second phase is mitosis, during which the cytoplasm divides. The third phase is cytokinesis, during which the cell divides into two daughter cells.
What is cell cycle ?The cell cycle is the series of events that take place in a cell leading to its division and duplication. It consists of two major phases: interphase and the mitotic phase. The mitotic phase is further divided into two stages: mitosis and cytokinesis.
During interphase, the DNA of the cell is replicated in preparation for cell division. This phase is divided into three subphases: G1 (Gap 1), S (Synthesis), and G2 (Gap 2).
During G1, the cell grows and prepares for DNA synthesis. During the S phase, the DNA is replicated, resulting in two identical sets of chromosomes. Finally, during G2, the cell prepares for mitosis.
After interphase, the cell enters the mitotic phase. During mitosis, the replicated chromosomes condense and line up at the center of the cell. The nucleus then divides into two identical nuclei, each with a complete set of chromosomes.
After mitosis, cytokinesis occurs, which is the process by which the cytoplasm divides, separating the two daughter cells. The cytoplasmic division usually occurs simultaneously with the telophase stage of mitosis, resulting in the formation of two genetically identical daughter cells.
Therefore, interphase is the phase in which DNA replicates, mitosis is the phase in which the nucleus divides, and cytokinesis is the phase in which the cytoplasm divides to form two genetically identical daughter cells.
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