the characteristics of Phylum Platyhelminthes are
Answers
Answer:
Platyhelminthes have the following important characteristics:
They are triploblastic, acoelomate, and bilaterally symmetrical.
They may be free-living or parasites.
The body has a soft covering with or without cilia.
Their body is dorsoventrally flattened without any segments and appears like a leaf.
Explanation:
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Related Questions
Which of the following is most likely responsible for the fact that organic molecules no longer formed spontaneously on Earth?
A. The amount of UV radiation increased
B. The amount of oxygen in the atmosphere increased
C. Water accumulated in the oceans
D. Earth's surface temperature warmed
Answers
Answer:
b
Explanation:
oxygen in air
and atmosphere
Which type of change would have the mildest effect on the homeostasis of an ecosystem?
OA. Sustainable farming
OB. Introduction of an invasive species
O C. Long-term flooding
OD. Removal of a keystone species
Answers
Homeostasis is the ability of an ecosystem to maintain a stable and balanced internal environment, despite external changes or disturbances. Any change that disrupts the balance of the ecosystem can have significant impacts on its homeostasis.
Answer:
A. Sustainable farming
Explanation:
Sustainable farming refers to agricultural practices that are designed to conserve the natural resources of an ecosystem and maintain its productivity over time. This type of change is generally intended to have a positive impact on the environment by reducing the use of harmful chemicals and promoting biodiversity.
What ocean did the Roman Empire border at its height
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It stretched over 5,000 km from the Atlantic coast of northern Britain, through Europe to the Black Sea, and from there to the Red Sea and across North Africa to the Atlantic coast. The remains of the Limes today consist of vestiges of built walls, ditches, forts, fortresses, watchtowers and civilian settlements.
Illustrate the significance of membranes with the example of viruses
Answers
Answer:
Cell membrane encloses all the cell organelles. In prokaryotes, membrane is absent and so membrane-bound cell organelles are also absent.
Significance of membrane can be explained with the help of viruses, as viruses lack cell membranes and that is why they require a host for living and uses the host's cell machinery to multiply.
Hence, cell membranes are important for living organisms to live and perform essential biological processes.
I NEED HELP ON KEY CONCEPT!!
Answers
to what temperature do scientists need to raise a strand of mouse dna for it completely separate?
Answers
Denaturation is done at a very high temperature of 95 degree Celsius for complete separation of mouse DNA.
What is PCR?The polymerase chain reaction, or PCR, is one of the most important uses of molecular biology. To amplify the target DNA molecule, PCR is utilised. In a thermal cycler, PCR is performed.
The three main stages to do PCR are as follows:
1. Denaturation 95 degrees Celsius is a very high temperature at which it is performed. This high temperature causes a process known as denaturation, which causes the DNA strands to split from one another.
2. The temperature is lowered to 55 degrees centigrade for renaturation in order to allow the denaturized DNA strands to anneal with one another.
3. DNA synthesis Deoxyribonucleotides, a thermostable DNA polymerase, and an RNA primer are added to the 3" ends of both strands to carry out the synthesis of new DNA strands relative to the template strands.
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Which of the following hormones maintains the integrity of the uterine wall during pregnancy?A. EstrogenB. ProgesteroneC. OxytocinD. Intermedin
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The hormone that maintains the integrity of the uterine wall during pregnancy is progesterone. The hormone that maintains the integrity of the uterine wall during pregnancy is B. Progesterone. This hormone helps to thicken the uterine lining and supports the developing embryo, ensuring a healthy pregnancy.
Uterine wall is essential for pregnancy of a women. The hormone that maintains the integrity of the uterine wall during pregnancy is B. The hormone that maintains the integrity of the uterine wall during pregnancy is progesterone. This hormone helps to thicken the uterine lining and supports the developing embryo, ensuring a healthy pregnancy.
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Last semester, Jordan got an A in biology. This semester his grade has dropped to a C, and he is really concerned.
Which questions should Jordan ask himself to help deal with this challenge? Check all that apply.
A) Am I able to keep up with my homework?
B) Am I smarter than most of the other students in class?
C) Am I taking a class that may be too difficult?
D) Am I anxious before I go to class each day?
E) Am I able to remember what I learned in class each day?
Answers
Answer:
acde
Explanation:
Answer:
Am I taking a class that may be too difficult?
Am I able to remember what I learned in class each day?
Am I able to keep up with my homework?
Explanation:
The purpose of photosynthesis is to take the reactants _, _, and _
Answers
Answer: carbon dioxide, water and light
Explanation:
Word equation for photosynthesis:
Carbon dioxide + water ---(light)---> glucose + oxygen
soil that has a lot of ______ will drain water easily.
Answers
Answer:
Sand
Explanation:
I believe
Answer:
C. Sand
Explanation:
DNA and RNA are both important nucleic acids. They have similarities and differences structurally.
Use the Venn diagram to compare the two nucleic acids. Drag each characteristic to the correct location.
ITEM BANK Move to Bottom
Deoxyribose sugar
Double stranded
Ribose sugar
Sugar, phosphate, nitrogen base
Throughout the cell
DNA
Both
RNA
Answers
Answer:
search this up
Explanation:
then add quiz let at the end :) hope this
Of all of the sunlight energy captured by the seaweed,
how much of it is available as food for the butterflyfish?
All of it
Some of it
None of it
I'm not sure
Answers
Answer:
some of it I believe is the correct answer for that question
why do we always keep petri plate lids and test tube caps on except when obtaining a specimen or inoculating a medium?
Answers
Petri plates are used to culture microorganisms, such as bacteria and fungi. Petri dishes are used in labs to hold and grow bacteria or other microorganisms.
The lids of petri plates and test tubes are kept on at all times except when getting a specimen or inoculating a medium because it helps prevent contamination by outside microorganisms. The lids also help maintain a constant environment within the petri dish or test tube, which is critical for proper growth and study of the microorganisms within.
The process of inoculation involves introducing bacteria or other microorganisms to a sterile medium in order to grow and study them. Before this can occur, the lid of the petri plate or cap of the test tube must be removed. Similarly, when obtaining a specimen, the lid of the petri plate must be removed to collect the specimen for testing.
Once the specimen has been collected or inoculation has been performed, the lid or cap must be replaced to maintain a sterile environment and prevent contamination.
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How can large and small-scale geoscience processes can work together to change landforms
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Large and small-scale geoscience processes work together to change landforms through a combination of slow and gradual geological processes as well as more rapid and localized processes. These processes include tectonic activity, weathering, erosion, deposition, and human activities.
On a large-scale, tectonic activity such as plate movements can lead to the formation of mountains, valleys, and other significant landforms over long periods of time. These processes involve the collision or separation of tectonic plates, resulting in the creation of mountain ranges, rift valleys, and other geological features.
On a smaller scale, weathering and erosion processes continuously shape and modify landforms. Weathering breaks down rocks into smaller particles, while erosion transports and redistributes these particles through the action of water, wind, and ice. These processes can create canyons, river valleys, deltas, and coastal features.
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3.05 x 10–3 standard notation
Answers
Answer: 0.00305
Trust (typing this cus i needa tpye atleast 20 words or letters or sum idek)
What is a vascular plant
Answers
Answer: A vascular plant is any one of a number of plants with specialized vascular tissue. The two types of vascular tissue, xylem and phloem, are responsible for moving water, minerals, and the products of photosynthesis throughout the plant. As opposed to a non-vascular plant, a vascular plant can grow much larger.
Explanation: The ferns, gymnosperms, and flowering plants are all vascular plants. Because they possess vascular tissues, these plants have true stems, leaves, and roots. Vascular tissue forms a central column, also called stele, through the plant axis for the transport of different substances. Vascular plants are said to have a true stem, leaves, and roots due to the presence of vascular tissues.
What is assimilation? What is the use of digested food in the body?
Answers
Answer:
Assimilation is the movement of digested food molecules into the cells of the body where they are used. For example: glucose is used in respiration to provide energy. amino acids are used to build new proteins.
Explanation:
hi guys i need the answer to #19
Answers
If Spike has 36 chromosomes, we can infer that he inherited half of his chromosomes from his mother and half from his father.
How to explain the informationHumans typically have 23 pairs of chromosomes, with one set coming from the mother (maternal chromosomes) and the other set from the father (paternal chromosomes). So, in Spike's case, we would expect him to have received 18 chromosomes from his mother and 18 chromosomes from his father.
The process of inheriting chromosomes from parents is related to heredity. Chromosomes contain DNA, which carries genetic information. When a baby is conceived, they receive half of their chromosomes from their mother's egg and half from their father's sperm. This genetic material contains instructions for various traits, such as eye color, height, and susceptibility to certain diseases. The combination of chromosomes inherited from both parents contributes to the unique genetic makeup of an individual, determining their physical characteristics and predispositions to certain traits or conditions.
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Rose conducted an experiment to study the effect of temperature change on the heart rate of Daphnia, transparent aquatic invertebrates commonly known as water fleas. She heated three different beakers of water containing Daphnia to a different temperature: 30°C, 32°C, and 34°C. She put a drop of water from each beaker on a slide mount and used a microscope to observe Daphnia in each sample. She counted the number of heartbeats in one minute and averaged her results. Which of the following could be a step in a replication of this experiment?
Answers
Answer:
Rose's classmate Mina observing Daphnia in water at 30°C, 32°C, and 34°C.
A step in replication of Rose's experiment could be to repeat the procedure of heating three different beakers of water containing Daphnia to 30°C, 32°C, and 34°C, counting the number of heartbeats in one minute for each sample using a microscope and slide mount, and averaging the results.
What is Daphnia?Daphnia, also known as water fleas, are small, transparent aquatic invertebrates that are commonly used in scientific experiments to study the effects of environmental factors on living organisms. In many experiments, Daphnia are subjected to changes in temperature, light, oxygen levels, and other variables to determine how these changes impact their behavior and physiology.
One example is studying the effect of temperature on heart rate, as done by Rose in the experiment described above. The use of Daphnia in experiments is beneficial because they are easy to culture, reproduce quickly, and are small and simple enough to be easily manipulated in the laboratory. Additionally, because Daphnia are freshwater organisms, they are particularly sensitive to changes in their environment, making them useful for investigating the impacts of various stressors on aquatic ecosystems.
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based on the information above, which of these would most likely be affected by a global warming?
Answers
Polar bear living on the ice sea.
All the major views of personal identity claim that in order for a person to survive through time, they must maintain the continued existence of a substance (though some claim a material substance is necessary while others say an immaterial substance is necessary). True or False
Answers
The statement "All the major views of personal identity claim that in order for a person to survive through time, they must maintain the continued existence of a substance (though some claim a material substance is necessary while others say an immaterial substance is necessary)" is True.
Personal identity is the philosophy that seeks to understand the character of humans. It enquires about the persistence of humans over time and their identity between different contexts.
The definition of personal identity is usually derived from the three criteria of memory, consciousness, and self-awareness. A "person" may be described as someone with a certain type of immaterial mind or substance. Even so, others see personal identity as something connected to an individual's physical body, which, in turn, is part of the larger physical universe.
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Coupled transcription/translation is found in domains where there is no membrane-enclosed nucleus (Bacteria and Archaea) because _____. [Choose two.] Multiple select question. in Eukarya, RNA polymerase transcribes mRNA within the nucleus, while ribosomes are located in the cytoplasm the conditions within the nucleus prevent formation of peptide bonds by the ribosomes present in Eukarya, ribosomes transcribe mRNA within the nucleus, while RNA polymerases are located in the cytoplasm RNA molecules are destroyed by ribonucleases within the nucleus the machinery for both systems are in the same location (cytoplasm) in such domains eukaryotic ribosomes are more complex than those found in other domains and can't work near RNA polymerases
Answers
Explain how carbohydrates break down
Answers
Answer:
Digesting carbohydrates involves first the starch and glycogen breaking down into glucose by amylase and maltase. sucrose and lactose are broken down by sucrase and lactase
how is the hydrolysis of atp coupled to reactions? what phosphate groups in atp are used in energy coupling reactions and what phosphate group is not used? why is the unused group not appropriate substrate for energy metabolism?
Answers
Process coupling is a method that cells typically employ. In this method, an energetically advantageous reaction (such as ATP hydrolysis) is closely connected with an energetically unfavorable (endergonic) reaction.
A product of one reaction is frequently "picked up" and employed as a reactant in the subsequent one through the usage of a common intermediate or linking. The G of the combined reaction, which results from the addition of two linked reactions, equals the sum of the G values of the coupled reactions. Both responses are possible as long as the total G is negative. If it is coupled with a very exergonic reaction, even a very endergonic reaction might happen (such as hydrolysis of ATP).A phosphorylated molecule is frequently the common intermediate when ATP is involved in reaction coupling (a molecule to which one of the phosphate groups of ATP has been attached). as in the case of sucrose production.
In fact, there are two reactions going on at once, not just one huge one, and the byproduct of the first reaction serves as the reactant for the second.
A phosphate group is transferred from ATP to glucose in the first step, creating an intermediate called phosphorylated glucose (glucose P). Because ATP is so unstable and truly "wants" to shed its phosphate group, this reaction is energetically advantageous (energy-releasing).
In the subsequent process, fructose and the intermediate glucose-P combine to produce sucrose. This reaction also releases energy and is spontaneous as glucose-P is relatively unstable (due to its connected phosphate group).
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Draw a feedback loop depicting the role of oncogenes and tumor suppressor genes in cancer
Answers
When oncogenes develop as a result of proto-oncogene mutation, a positive feedback loop occurs.
Oncogenes and tumour suppressor genes play several roles in cancer.
Oncogenes are created by the activation of proto-oncogenes, whereas genes that inhibit the tumour develop cancer when they are not activated, which is a significant distinction between them and oncogenes.Some malignancies in families have been identified to have genetic abnormalities or gene mutations.Oncogenes and tumour suppressor genes are the two primary categories of genes that influence cancer.Oncogenes:Genes known as proto-oncogenes generally aid in cell growth.an anti-oncogene, also known as a tumour suppressor, is a gene that regulates cell division and reproduction.Cancer will develop if the cell continues to grow unchecked.A plant's function is lost or reduced when the compression factor of the plant is changed.This can cause the cell to develop abnormally together with other genetic abnormalities.Compared to the role played by oncogenes, the loss of function of these genes may be even more crucial in the emergence of human cancer.To learn more about oncogenes Please click on the given link:
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Bacteria and other cells have defense mechanisms that discourage DNA modification. From the organism’s standpoint, which is likely NOT true?
A.
DNA modification could be harmful to the organism.
B.
DNA modification could be helpful to the organism.
C.
DNA modification could affect more genes than the target gene.
D.
DNA modification could result in cell death.
Answers
The statement which is not true from the organism’s standpoint is B. DNA modification could be helpful to the organism.
Organisms have developed defense mechanisms against DNA modification to prevent potential harmful consequences. DNA modification can lead to mutations or changes in the genetic code, which could have negative effects on the organism such as genetic disorders or cell death. Therefore, organisms have evolved mechanisms to discourage DNA modification and maintain genetic stability.
While it is possible for DNA modification to have some benefits for the organism, such as adaptation to changing environmental conditions, this is not the organism's primary concern. The primary concern is maintaining genetic stability to ensure the survival and reproduction of the organism.
Therefore, the correct option is B. DNA modification could be helpful to the organism.
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The photo shows a space heater. Which energy transformation is shown in the photo? A. Chemical - electromagnetic and thermal B. Electromagnetic and thermal - chemical C. Electromagnetic and thermal - electrical D. Electrical - electromagnetic and thermal
Answers
Answer:
D. Electrical - electromagnetic and thermal
Explanation:
Energy is the capacity to do work, and it exists in various forms. Some of its forms are: nuclear energy, solar energy, electrical energy, mechanical energy, sound energy, light energy, heat/ thermal energy etc. These forms can be transformed from one to another. Example is the conversion of electrical energy into light energy and heat energy by an electrical Tungsten-bulb.
A space heater is an electrical device used for generation of majorly heat energy, thus it is powered by electrical energy. Therefore it transforms electrical energy into electromagnetic and thermal.
Write a testable question that could be used to further investigate the topic of using the fossil record to identify changes in life on earth.
Answers
What kind of organisms existed in the past?
How did organisms move about? are some testable questions hat could be used to further investigate the topic of using the fossil record to identify changes in life on earth.
Fossils are the remains of extinct plants and animals that have been encased in layers of rock.The existence of fossil records demonstrates how living things have altered or evolved over time. The specific order in which these species have lived has been identified by paleontologists. For instance, older rocks contained simpler species, while younger rocks contained complex life.Existence of species with transitional traits that are placed in sequential stratigraphic order is one pattern in the fossil record. This indicates that the fossil record demonstrates minute changes in the structures of creatures across time, supporting evolution.learn more about fossil here: https://brainly.com/question/11224681
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Which results in mechanical digestion in the stomach?
Answers
Answer:
The term mechanical digestion refers to the physical breakdown of large pieces of food into smaller pieces which can be done by digestive enzymes, hydrochloric acid. Mechanical digestion in the stomach results in the formation of bolus.
Explanation:
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5. Which two systems below are most important when a person throws a dart? PLEASE HELPP!! A skeletal and circulatory systems C integumentary and skeletal systems B respiratory and excretory systems D muscular and nervous systems
Answers
Answer: Hewo, there! your answer is Below
A skeletal and circulatory systems would be my Answer
Explanation:
the skeletal system is responsible for protection, shape, and support. For example the skeletal system protects all some of your most vital organs, such as the brain, lungs, and heart. The skeletal system creates red blood cells which the circulatory system transports. The skeletal system helps the body move.
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