Final answer:
The law of conservation of mass states that the mass of reactants equals the mass of products during a chemical reaction, meaning matter is conserved and not created or destroyed. Thus, option C is correct.
Explanation:
The correct answer to the question is: C. The total mass of the reactants equals the total mass of the products. This statement summarizes the law of conservation of mass, which holds that during any chemical reaction, matter is neither created nor destroyed, meaning that the mass of the substances before the reaction (the reactants) must be the same as the mass of the substances after the reaction (the products).
For example, when hydrogen gas reacts with oxygen to form water, the mass of hydrogen and oxygen before the reaction is equal to the mass of the water produced after the reaction. This demonstrates that the total mass is conserved throughout the process.
In summary, this fundamental principle ensures that during a chemical change, the total mass remains constant, illustrating that in closed systems, mass can change form but is conserved.
3. Looking at some pond water under the microscope, you notice an unfamiliar rod-
shaped cell about 200 mm long. Knowing that some exceptional bacteria can be as
big as this or even bigger, you wonder whether your cell is a bacterium or a
eukaryote. how will you decide? if it is not a eukaryote, how will you discover
whether it is a bacterium or an archaeon? [20]
Answer:
1. The cells of eucaryotes are characterized by the presence of a nucleus and membrane-bound organelles. Bacteria, on the other hand, do not possess a nucleus or membrane-bound organelles.
2. As bacterial cell walls are made of peptidoglycan (protein and sugars), and archaeal cell walls are composed of polysaccharides (sugars). I would add a lysis solution that separates the cell wall and integral molecules. Then, I could use High-performance liquid chromatography to quantify the chemical composition differences of both walls.
Explanation:
1. The cells of eucaryotes are characterized by the presence of a nucleus and membrane-bound organelles. Bacteria, on the other hand, do not possess a nucleus or membrane-bound organelles.
2. Both archaea and bacterial cells lack membrane-bound organelles and nucleus, but they both possess a cell wall. Therefore, if I realize that the cell is definitely a prokaryote and not a eukaryote, then, to determine if it is from an archaeon or bacterium, I would analyze the integrity of their cell walls as bacterial cell walls are made of peptidoglycan (protein and sugars), whereas archaeal cell walls are composed of polysaccharides (sugars).
I could add a lysis solution that separates the cell wall and integral molecules. Then, I could use High-performance liquid chromatography to quantify the chemical composition differences of both walls.
Also, the majority of archaea cannot be cultured within the laboratory setting. So that could also work as another method, except it wouldn't be as reliable as the others.
PLEASE HELP!!!!!!!!!!! ANSWERS ONLY!!!!!!!!!!!
Scientists have genetically engineered crops to be resistant to herbicides. This allows farmers to kill weeds with small doses of herbicides that don’t harm the crops. Why, then, are people concerned that transgenic plants may lead to an increase in the use of herbicides?
Cross-pollination could cause the crops to lose their herbicide resistance.
Weeds may naturally develop herbicide resistance with each dose.
Herbicide-resistant crops may grow out of control and become weeds.
Cross-pollination could pass herbicide-resistant genes to the weeds.
Answer:
The correct option is Option C i.e. Herbicide-resistant crops may grow out of control and become weeds.
Explanation:
1. The herbicide resistance is a genetic character that is introduced into the plant with help of genetic engineering.
2. Now crops are not sexually reproduced. New seeds are planted every season. So chance of losing the herbicide resistance is less.
3. The risk of weeds becoming herbicide resistant is there even with genetic engineered crops.
4. Cross-pollination between two different species doesn’t occur generally.
5. But if these plants are not killed by any herbicides, they themselves can grow too fast as weeds.
Answer:
A. Cross-pollination could cause the crops to lose their herbicide resistance.
Explanation:
Herbicide resistance is the acquired capacity of plants to endure and imitate following introduction to a portion of herbicide typically deadly to the wild kind. Herbicides don't actuate opposition in weed species, rather they basically select for resistant individuals that normally happen inside the weed populace.
Herbicide resistance, communicated by a recessive allele, advances and spread generally gradually as the dominant heterozygotes and homozygous prevailing phenotypes are dispensed with by use of the herbicide to which resistance created.
This is truthful for cross-pollinating species, be that as it may, in exceptionally self-pollinating species, the resistant alleles can spread rapidly as selfing increments the recurrence of homozygotes to the detriment of heterozygotes.
Please help me with this
Answer:
letter A there u go i hope this helps you
A gene in DNA is the code for
Answer: Genes tell the body how to behave in certain ways, so there are genes that represent particular characteristics, and lack of genes or changes in them can lead to diseases and problems in the body.
Explanation:
Does a 350 pound football player have larger cells than 120 pound cheerleader? True or false explain
Answer:
False
Explanation:
Football players cells are the same as the cheerleader. But being his larger size he does have more cells.
Scientists estimate that by the year 2025 the worlds population will reach
Answer:
The girl above is correct it is 8 billion.
Please help!!!!!!!!!!!!!!!
Answer:
if you had 4 offspring then 2 would be black and 2 would be white because of the punt square being dominant (B) and the recessive of the black one and the 2 bb's of the white one it would come out both ways hope that helpped
Explanation:
A) 50% of guinea pigs have white fur
50% of guinea pigs have black fur
What do you understand by normal flora?
Answer: normal Flora is the bacteria that came into contact with our body immediately we were born because bacteria are found everywhere i.e in airparticles and from then we live with them and they help our body to be antitoxic to the disease that may be caused by another same bacteria causing microorganisms
Explanation:
help me!!! picture is provided!!!
Answer:
The species attracted new predators
Explanation:
Select the correct location on the image.
The diagram shows an unfertilized female sex cell at different locations within the reproductive system. At which location can it correctly be
termed an oocyte?
Unfertilized female sex cells which are present in the covering of blue regions are correctly termed oocytes.
What is Oocyte?An Oocyte may be defined as a female unfertilized female sex cell or immature egg cell that is present in the ovary and may undergo meiotic division to form an ovum.
According to the diagram, the portion of the female reproductive system which is blue in color is known as the ovary that produces the egg cells in the females and is termed an oocyte.
Therefore, it is well described above.
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Answer:
Explanation:
the second box
Is the question is it ethical to eat meat testable?
what is the difference between internal and external respiration??
Answer:
External respiration occurs in the lungs where oxygen diffuses into the blood and carbon dioxide diffuses into the alveolar air. Internal respiration occurs in the metabolizing tissues, where oxygen diffuses out of the blood and carbon dioxide diffuses out of the cells.
Explanation:
Which statements about fossils are true? Check all that apply.
Fossils give clues about Earth's climate in the ancient past, show what Earth was like millions of years ago, and can be found in ice. Hence the correct options are a, c and d.
Fossils are crucial indicators of Earth's history and provide valuable insights into the planet's past conditions. By studying fossils, scientists can gain clues about Earth's ancient climate, environmental changes, and the evolution of life over millions of years. Fossils capture a snapshot of the past, showcasing the types of organisms that once inhabited the Earth and the ecosystems they were a part of.
Additionally, fossils can be found in various geological formations, including ice, where frozen specimens can offer unique glimpses into prehistoric life.
Contrary to the notion that only animals can become fossils, plant remains and other organic materials can also be preserved under certain conditions, contributing to a comprehensive understanding of Earth's dynamic history. While tar pits may preserve some fossils exceptionally well, fossils can be found in various geological settings, providing a diverse and comprehensive record of our planet's geological and biological history. Hence the correct options are a, c and d.
Complete question:
Which statements about fossils are true?
Check all that apply.
A. They give clues about Earth’s climate in the ancient past.
B. Only animals can become fossils.
C. Fossils show what Earth was like millions of years ago.
D. Fossils can be found in ice.
E. The best fossils are preserved in tar.
true or false viruses defy classification
Answer:
false
Explanation:
classification defies viruses
Decide what is meant by the statement “science is not limited to the laboratory “?
Answer:
Science is not limited to the laboratory because it has done in a laboratory to study the physical, chemical and biological aspects of the natural system. It mean that science presents everywhere and happening at all times. It also mean that anyone can become a scientist and they can conduct the experiments with the data and a hypothesis.
Explanation:
Science is the study of the physical, chemical, biological, and mathematical study of nature. The science is studied in laboratory conditions to validate the various reaction and principles occurring in natural systems.
In a laboratory, small system or model is made to study the particular aspect of a large system. Thereby, science in the laboratory helps to find out the science of the actual world. Various principles, machines and designs are inspired by the natural systems.
What is the name of a complex group of organisms that are connected and interact with one another
An ecosystem is a complex network of interacting organisms and their environment. It includes a food web that illustrates the transfer of energy between producers, consumers, and decomposers. Ecosystems are vital for maintaining ecological balance and the flow of nutrients.
The term for a complex group of organisms that are connected and interact with one another is an ecosystem. In an ecosystem, different populations of organisms coexist and form a community that interacts not only among themselves but also with the physical environment. This level of ecological study helps us understand the intricate connections that allow diverse life forms to thrive together. For example, in an ecosystem, a food web illustrates how energy and nutrients flow from one organism to another, demonstrating the dependence and relationships between producers, consumers, and decomposers.
Each organism plays a specific role within this system, contributing to the broader biogeochemical cycles that sustain life on earth. The primary producers, such as plants and algae, harness energy from the sun to create biomass through photosynthesis. This biomass serves as the foundation for all other organisms within the food chain, with consumers and decomposers relying on it for their survival. The complex interactions and feedback mechanisms within ecosystems are essential for maintaining balance and resilience against environmental changes.
what is the function of a centrosome
Answer:Organizing changes to the shape of the cell membrane that allow the membrane to "pinch" in two during cell division.
Ensuring that chromosomes are properly distributed to daughter cells by creating and shortening mitotic spindle fibers.
Overseeing other important changes to cell membrane shape, such as those seen in phagocytosis.
Explanation:
he main function of the centriole is to help with cell division in animal cells. The centrioles help in the formation of the spindle fibers that separate the chromosomes during cell division (mitosis).
Any change in plant communities over time is called
Answer:
ECOLOGICAL SUCCESSION
A change in plant communities over time is called succession, which is an important concept in ecology. Succession can be categorized into primary and secondary.
Explanation:Any change in plant communities over time is called succession. This is a significant concept in ecology which describes how the structure of a biological community evolves over time. Succession can be primary or secondary. Primary succession occurs in an area that has never previously been colonized by life, like a new volcanic island, while secondary succession happens in areas where a community previously existed but was removed or disturbed, such as after a forest fire.
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What scientific word is used to describe a person who is deficient in one or more particular food groups?
Answer:
Malnourished
Answer: Malnutrition
Explanation:
Malnutrition can be defined as the condition in which the person is deficient in one or more nutrients.
This condition can lead to many diseases in the body of a person because a nutrient in the body is responsible for many functions.
Being deficient in one or nutrient will affect the body adversely. The body needs all the types of nutrients to work properly.
Hence, the correct term for nutrient deficient people is malnutrition.
What role do you play in the food web?
A. Producer
B. Consumer
C. Decomposer
D. Human
Justify by explaining why the answer you chose is CORRECT AND why the other 3 are INCORRECT.
Answer:
D human because decomposer are mainly fungi and bacteria,producer are plants, consumers are every organism that eats something else it include herbivores, carnivores(animals that eat other animals), parasites (animals that live off of other organisms by harming it), and scavengers (animals that eat dead animal carcasses)
Humans play the role of a consumer in a food web as they eat other organisms to gain energy and nutrients. They do not play the role of producers or decomposers. The term 'human' alone does not specify a role in a food web.
Explanation:In the context of a food web, we humans play the role of a consumer. Consumers are organisms that eat other organisms to gain energy and nutrients. We certainly fit into this category as we eat both plant (producers) and animal species (other consumers).
Producers are incorrect because they are typically plants that make their own food through photosynthesis which humans do not do. Decomposers are also incorrect as they break down dead or decaying organisms, a role humans don't play in the food web. Lastly, while 'Human' is within the options, it is too broad a term for this question as it doesn’t specify the role that humans play.
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28.
What is the ratio of C, H, and O atoms in carbohydrates?
2:3:2
stry
1:6:1
Today
1:3:1
on, and
1:2:1
Answer:
1:2:1
I hope this helps you!
Answer:
1:2:1
Explanation:
If you enjoy working with plants and animals, the career cluster to follow is:
A: distribution and logistics
B: agriculture, food, and natural resources
C: education and training
D: science and technology
Answer:
b just b got it correct
Explanation:
Match the compound with the correct element contained within it.
Iron
1. Chlorophyll
Carbon, hydrogen,
nitrogen, oxygen,
phosphorus, and calcium.
2. Hemoglobin
3. 300 enzymes
Cobalt
4. 30 enzymes
Zinc
5. Vitamin B12
Magnesium
6. Organic compounds such as
carbohydrates, lipids, proteins, and
nucleic acids.
Copper
Answer: 2 lsidgyf
Explanation:idgar
What are methods of combating toxic pesticides?
Answer: -Buy organic and locally grown fruit and vegetables.
- Wash fruits and vegetables before eating.
- Use non-toxic methods for controlling insects in the home and garden.
Explanation: Doing the following will help eliminate toxic pesticides because in season fruits and veggies from your local market is the best assurance of pesticide-free produce.
Answer:
Pesticides are usually used to kill or control the growth of pests.
Pesticides can be toxic and can cause several health effects such as respiratory problems to cancer.
There are several methods combating toxic pesticides as mentioned below:
1) People should use non-toxic methods for the purpose of controlling pests in agricultural practices.
2) All fruits and vegetables are should be washed before eating for example a diluted solution of mild dish-washing detergent can be made for this purpose.
3) Always prefer to buy organic in-season fruits present in market having high assurance of pesticide free.
4) Planting own organic vegetables an d fruits is best way to keep yourself away from toxic pesticides.
5) Should have knowledge of ways of testing toxicity.
What is the haploid deer mouse chromosome number?
Answer:
jdskljadlkjsalkjdlkjsalkdjlsa
Explanation:
A process used by plants to convert light energy into
food energy is
Answer:
In photosynthesis plant convert light energy to food(glucose)using co2,water and in the presence os chlorophyll.
Explanation:
What is the first step of the Calvin-Benson cycle?
ATP and NADPH combine to make G3P.
G3P is used to make glucose and other
compounds.
ATP and G3P combine to make RuBP.
Carbon dioxide and RuBP combine to make PGA.
The first step of the Calvin cycle is the combination of carbon dioxide with RuBP to produce PGA. This step is catalyzed by the enzyme RuBisCO and is the initial act of carbon fixation in the photosynthetic process of converting atmospheric carbon dioxide into glucose.
Explanation:The first step of the Calvin-Benson cycle, also known simply as the Calvin cycle, involves the enzyme RuBisCO fixing carbon dioxide to a five-carbon molecule called ribulose biphosphate (RuBP). This reaction produces two molecules of 3-phosphoglycerate (PGA). Therefore, the correct first step of the Calvin-Benson cycle is: Carbon dioxide and RuBP combine to make PGA.
The Calvin cycle is a process of photosynthesis where ATP and NADPH, produced in the light-dependent reactions, provide the energy to convert carbon dioxide from the atmosphere into organic compounds like glucose. Throughout the cycle, the energy is used to regenerate RuBP, allowing the cycle to prepare for more carbon fixation and continue the process of photosynthesis.
which organ is involved in ingestion?
mouth
rectum
villi
liver
Answer:
mouth
Explanation:
Write the structures and functions of the following epithelial tissues,connective tissues,muscular tissues,nervous tissues
Ciliated epithelial cells. Cilia are tiny hair like structures on the surface of the cell. The hairs sweep hair, mucus, trapped dust and bacteria up to the back of the throat where it can be swallowed.
Cartilage is a soft, spongy connective tissue. The bones in a synovial joint are connected by ligaments. Ligaments are a type of connective tissue and are tough, fibrous and slightly elastic. They connect bone to bone and help keep the joint together.
Each type of muscle tissue in the human body has a unique structure and a specific role. Skeletal muscle moves bones and other structures. Cardiac muscle contracts the heart to pump blood. The smooth muscle tissue that forms organs like the stomach and bladder changes shape to facilitate bodily functions
Nervous tissue is composed of three main parts: nerves, the spinal cord and the brain. The primary function of nervous tissue is to receive stimuli and send the impulse to the spinal cord and brain. The brain sends back a response to the muscles via the nerves.
Epithelial tissue covers and lines surfaces, connective tissue binds cells and organs, muscular tissue moves the body, and nervous tissue transmits signals.
Explanation:Epithelial tissue is composed of sheets of cells that cover the exterior surfaces of the body, line internal cavities and passageways, and form certain glands. Its functions include protection, absorption, secretion, and selective permeability.
Connective tissue binds cells and organs together. It provides support, protection, and integration of body parts. Examples of connective tissue include bones, cartilage, blood, and adipose tissue.
Muscular tissue is involved in movement. There are three types of muscle tissue: skeletal muscle that is voluntary, smooth muscle that is involuntary, and cardiac muscle that is found in the heart.
Nervous tissue is responsible for transmitting electrical signals throughout the body. It enables communication between different regions of the body through nerve impulses.
Describe how the branches on a cladogram show the relationships among organisms.
Answer:
relationships among organisms and evolutionary relationships for organisms with a shared common ancestor.
Final answer:
Cladograms use branches to show evolutionary relationships by illustrating how species diverged from common ancestors, with nodes representing the emergence of new traits.
Explanation:
The branches on a cladogram illustrate the evolutionary relationships among organisms by showing how groups of organisms diverged from common ancestors over time. Each branch or node represents a point where a new trait emerged, distinguishing one group from others, thereby forming a new clade. The length of the branches can indicate the amount of molecular changes that have occurred over time. As organisms evolve, they might acquire unique traits that set them apart from their ancestors, and these traits can also be represented on the cladogram.
For instance, in a cladogram that includes mammals, reptiles, and birds, the reptile clade includes birds, indicating that birds evolved from reptiles, contradicting the separate classification by Linnaeus. By observing the branching patterns and the traits at each node, we can interpret phylogenetic relationships and hypothesize how different species are related by descent.