They are a diverse group of eukaryotes that include several unrelated lineages.
What are protists?Protists are unicellular, eukaryotic, and microscopic organisms.
They have some characteristics of both plants and animals.
Examples are amoeba, euglena, plasmodium, etc.
They can be parasites.
They live in moist areas and water.
Thus, the correct option is A)They are a diverse group of eukaryotes that include many unrelated lineages.
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What color does Spica appear to be? Why?
sorry I'm like 3 years late lol but
Answer:
Spica appears to be blue because of how hot the star actually is that is why Spica is blue
what is the major ion in seawater
Answer:
The answer should be Chloride.
Explanation:
Which end of an earthworm contains an organ that can detect smells?
Worms have sense organs in the Anterior end of their body .
What is sense organ?
Sense organs are the specialized organs composed of sensory neurons, which help us to perceive and respond to our surroundings. There are five sense organs – eyes, ears, nose, tongue, and skin.
What is Anterior end ?
The anterior end presents the front side of the body near the head region.
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what are disadvantages of using pesticides
Where would you most likely find an organism that belongs to the domain Archaea?
Himan Gut. Moldy Bread. Hot springs. and yogurt.
Moldy bread is the answer
What type of tissue is most likely being viewed under a microscope?
The morphology of cells in tissue viewed under a microscope can indicate whether it is simple or complex tissue. Loose connective tissue is recognized by cells scattered in a transparent background, while vascular tissues are identified by cells such as xylem and phloem. For small surface structures, electron microscopes are best, but light microscopes, commonly used by students, often require staining to view cell components.
Explanation:When viewing a specimen under a microscope to determine the type of tissue it is, several characteristics can be noted. For example, if the morphology of the cells observed is similar and they appear uniform, the tissue is likely simple tissue. In contrast, complex tissue would exhibit a variety of cell types and structures. Specifically, if under the microscope, the tissue specimen shows cells located in spaces scattered in a transparent background, this is indicative of loose connective tissue.
In the context of plant biology, if a student reported vascular tissue while inspecting a cross-section of a plant stem, the presence of cells such as xylem, with thickened cell walls, and phloem would be indicative of this type of tissue. Cork cells, as viewed by Robert Hooke, come from the bark of the cork oak tree, and these cells create a protective and insulating material that is also impermeable to liquids and gases. For viewing very small surface structures of a cell, a scanning electron microscope (SEM) or a transmission electron microscope (TEM) would be most suitable due to their high resolution.
Light microscopes are commonly used by students and are advantageous for viewing living organisms. However, due to cells generally being transparent, details may not be distinguishable without the use of special stains, which unfortunately often result in the death of the cells.
Why is sludge dumping a threat to marine and human life?
Ans.
Sludge can be defined as the semi-solid waste produced by sewage treatment of municipal and industrial wastewater as a byproduct. Sludge dumping involves discharge if sludge into the ocean.
It contains various contaminating agents, such as pathogens, heavy metals, chemicals, such as pesticides, and other hazardous substances. 'Sludge dumping is a threat to humans and marine life as it can cause various diseases, pollute beaches, and kill marine organisms.'
Sara measured the amount of potassium nitrate (KNO3) that could be dissolved in 100 grams of water at different temperatures. She repeated the test five times. The data from Sara's experiment is listed in the table below.
Which of the following is the best inference Sara could make based on her data?
Answer:
The amount of KNO3 that can dissolve in water increases as temperature increases
Explanation:
Study island
As temperature rises, all three solutes become more soluble. The greatest significant increase in solubility is seen with potassium nitrate, which goes from about 30 g per 100 g water to over 200 g per 100 g water. Sodium chloride's solubility virtually ever varies.
What affect the solubility by increasing the temperature?The average kinetic energy of the solute molecules increases along with the solution's temperature.
As a result, the molecules have a lower ability to bind together and dissolve more easily. When temperature rises, solid states become more soluble.
Because some heat is dissipated during the dissolving process, the tension is reduced. Therefore, as the temperature rises, so does the solubility (concentration).
Therefore, Temperature increases cause an increase in the amount of KNO3 that can dissolve in water.
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20 points!!! _____________ water falls to the lithosphere and hydrosphere. PLZ HELP ASAP!
What makes up an owl pellet?
Answer:
c
Explanation:
Peppered moths come in two colors, black and white. What did Kettlewell show, with regard to peppered moth populations and tree coloring? (Recall that England at the time was heated mainly by coal in urban areas.)
A) In smoggy areas, dark moths have a higher survival rate than white moths.
B) White moths stand out in rural areas, and quickly disappear from those areas.
C) The black moth and white moth forms were actually two different species of moths.
D) Environmental conditions do not affect physical features of a species over a short time period.
Answer:
A
Explanation:
In smoggy areas, dark moths have a higher survival rate than white moths.
When an abundance of lactose is present in a bacterial cell then
A. Lactose will block the action of RNA polymerase, Prohibiting of the transcription of the gene.
B. Enhancers will be triggered to speed up the process of mRNA production.
C. The lac operon Will be inhibited and no lactose will need to be produced via translation.
D. Lactose will bind to the
repressor, Allowing the gene coding for the enzyme lactase to be transcribed.
Answer:D
Explanation:Hope this helps
Final answer:
Lactose binds to the repressor, allowing transcription of the enzyme lactase. The lac operon system regulates gene expression efficiently, promoting the production of enzymes for lactose digestion only when lactose is present and thereby saving cellular energy. So the correct option is D.
Explanation:
When an abundance of lactose is present in a bacterial cell, the correct response is D. Lactose will bind to the repressor, allowing the gene coding for the enzyme lactase to be transcribed. In the lac operon system, the presence of lactose triggers the conversion of some lactose into allolactose, which then binds to the lac repressor. This interaction inhibits the repressor's activity, preventing it from binding to the operator region of the operon. With the repressor not bound, RNA polymerase can freely initiate the transcription of the lac operon genes, leading to the expression of enzymes that enable the digestion and utilization of lactose.
Essentially, the lac operon functions as an efficient regulatory system that ensures gene expression occurs only when necessary. In the absence of lactose, the lac repressor binds to the operator region, acting as a 'road-block' to RNA polymerase and preventing transcription of the lac genes. The system optimizes energy use within the cell by expressing genes only when their products are needed, which in this case, are enzymes for lactose digestion.
broad-leafed trees in temperature zone lose their leaves?
a.to survive the extreme temperature of summer.
b.to survive a lack of rain in the dry season.
c.to survive colder seasonal temperatures.
d.to allow for greater penetration of sunlight.
Answer:
The correct answer is option c-to survive colder seasonal temperatures.
Explanation:
Broad leafed trees shed their leaves in autumn or winter season which is experienced with colder temperature.
These leaves are called deciduous leaves and shed their leaves because these leaves lack wax coating and anti-freeze chemicals due to which the fluid which flows through veins can be freeze by cold temperature so, plants to save the energy get rid of them.
Thus, option c-to survive colder seasonal temperatures is the correct answer.
An organ system consists of a group of organs that performs specific functions necessary for the survival of an organism. Humans have eleven different organ systems: integumentary, skeletal, muscular, nervous, endocrine, circulatory, lymphatic, respiratory, digestive, urinary, and reproductive.
Discuss the function of neurons, the brain and the spinal cord within the human nervous system while explaining the interrelationship of each organ.
The nervous system directly governs organs. The brain collects information from various organs and sends messages to keep them healthy. The skeletal system helps us move when our muscles contract.
What is the interrelationship of each organ with nervous system?Organ system communication is key to teamwork. They must respond to each other and vary their responses to maintain physical equilibrium. Autonomic nerve system and endocrine system control organ communication.
ANS controls involuntary functions. The ANS controls heart rate, blood flow, and digestion. You don't need to tell your heart to beat faster or squeeze muscles to digest meals. These functions aren't even worth considering. The autonomic nervous system controls them. Neurotransmitters deliver messages between nervous system sections and to other organ systems.
Endocrine glands secrete hormones into the bloodstream. Hormones in the blood circulate to all bodily cells. Hypothalamus controls the endocrine system. Hypothalamus hormones travel directly to pituitary gland cells. Pituitary is endocrine system's master gland. Its hormones activate or deactivate other endocrine glands. The pituitary gland secretes thyroid stimulating hormone, which stimulates the thyroid gland to secrete thyroid hormone. Thyroid hormone stimulates metabolism in bodily cells.
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Analyze the given diagram of carbon cycle below. Part 1: What is happening at location G? Part 2: Which type of energy transformation is taking place at this location? Part 3: Justify why this process is a recycling of carbon in the carbon cycle. Use complete sentences to explain your answer.
Which of the following hereditary conditions is characterized by abnormally shaped blood cells? Acne. Heart disease. Sickle cell anemia. Type 1 diabetes.
Answer:
sickle cell
Explanation:
Answer:
Sickle cell anemia
Explanation:
Hemoglobin serves to carry oxygen and is present in red blood cells. Sickle cell anemia is caused by a point mutation in one of the hemoglobin gene that codes for its beta chain. The mutated allele of the beta globin chain encodes the abnormal hemoglobin molecules which stick to one another resulting in sickle shaped red blood cells.
I need to figure out the answer
Which of the following astronomical bodies is the lowest in hierarchy? Galaxy Planet Solar system Star
An astronomical object or the celestial object refers to a naturally taking place physical entity, composition, or association, which prevails in the observable universe. Or it can also be illustrated as the celestial body refers to any natural body external to the atmosphere of the Earth. The examples, are the Sun, Moon, and the planets of the solar system.
In the mentioned objects, the lowest in the hierarchy is the planet, then comes the star, then the solar system, and finally the galaxy.
Landforms tend to weather and wear down over time. The Grand Tetons are an area of steep, rugged mountains that are thought to be about 9 million years old. What change would an observer most likely see if he could look at the mountains again after another 9 million years?
Answer:
Explanation:
Over time, steep hills are weathered. Weathering and erosion break down and remove rocks and soil such that the mountains tops become more rounded and the rocks and soil deposit on the hillsides, making them less steep.
After another 9 million year of erosion and deposition, an observer could expect the mountains to be less steep and more rounded.
How do cells eliminate waste? Thanks for the help!
20. Why are scientific theories changed but never thrown away?
Scientific Theory change but not thrown away because scientist continue looking for possibilities and exact proportion to prove such theory, though it is change because they always conducted hypnosis in every theory and once it proves something different they conduct another hypothesis for more actual evidence.
How does an enzyme’s active site relate to its substrate?
The active site of an enzyme is a uniquely shaped region that binds specifically to its substrate, either through a rigid lock-and-key model or a more flexible induced fit model, enabling the enzyme to catalyze a specific reaction.
The active site of an enzyme relates to its substrate through a specific physical and chemical complementarity, which enables the enzyme to catalyze a reaction involving the substrate. Two models explain this relationship: the lock-and-key model and the induced fit model. In the lock-and-key model, the substrate fits into the active site perfectly without any alterations to the enzyme's shape, much like a key fits into a lock. In contrast, the induced fit model allows for some flexibility; the active site undergoes a conformational change to snugly fit the substrate, accommodating a small group of similar substrates, thus facilitating the reaction.
Once the substrate is bound to the active site, the enzyme catalyzes the conversion of the substrate into the product(s) of the reaction. This specific interaction and catalysis are critical for the biological functions that enzymes serve, from digestion to DNA replication.
What does a completely filled circle represent on a pedigree chart?
Answer:
the most likely answer is C
Explanation:
I NEED HELP ASAP!!!
_______ are single-celled organisms with no nucleus.
The kingdom _______ is relatively small.
Eubacteria are classified by _______.
_______ are round bacterial cells.
_______ are rod-shaped bacterial cells.
_______ are spiral-shaped bacterial cells.
Prokaryotes are single-celled organisms without a nucleus. The kingdom Monera is relatively small. Bacteria come in different shapes - cocci, bacilli, and spirilla.
Explanation:Prokaryotes are single-celled microorganisms lacking a true cell nucleus and membrane-bound organelles like mitochondria and the endoplasmic reticulum. They include two major domains: Bacteria and Archaea. Prokaryotes are characterized by their simplicity, with genetic material (DNA) located in a nucleoid region. They play vital roles in various ecosystems, participating in nutrient cycling and serving as decomposers. Some prokaryotes can be pathogenic, causing diseases in humans and other organisms. The correct fill-in-the-blanks are -
Prokaryotes are single-celled organisms with no nucleus. The kingdom Monera is relatively small. Eubacteria are classified by their shape. Cocci are round bacterial cellsBacilli are rod-shaped bacterial cells, and Spirillas are spiral-shaped bacterial cells.Learn more about Prokaryotes here:https://brainly.com/question/33439033
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Where would you most likely find an organism that belongs to the domain Archaea?
Hot springs
Human gut
Moldy bread
Yogurt
Answer: Hot springs
Explanation: The kingdom Archaea consists of bacterial species which can survive very harsh conditions. These are the oldest organisms present on Earth. These bacterial species can be found in areas where other organisms can't exist. The extreme conditions where they can be found are- high salt content, hot water springs, in the ice at north pole, etc.
Answer:
IT IS NOT YOGURT IT IS HOT SPRINGS I DID THE 5.06 AND GOT 99 CAN YOU BELIEVE IT.
Explanation:
How does the immune system protect the body against
Changes of the internal body temperature
Changing environmental conditions
Changes cause by harmful pathogens
Changes in the pH of the blood
Answer:
C. changes caused by harmful pathogens
Explanation:
Approximately how much of the energy available in the tissues of the producer is eventually incorporated into the tissues of a secondary consumer?
Frost wedging occurs when water seeps into a crack in a rock, freezes, and causes the crack in the rock to widen.
Please select the best answer from the choices provided
T
F
Answer: True
Explanation:
Weathering is a process by which rocks or any other material get disintegrated into small sediments and parts under the influence of physical or chemical agents.
Frost wedging is a physical weathering process in which the water enters into the rock. The freezing of this water under the influence of cold external temperature condition can disturb the internal structure of the rock. This process will cause the disintegration of the rock into parts and small sediments.
estudos apontam que o cerebro tem milhares de funçoes. qual a ciencial que estuda o cerebro?
Answer:k
Cognición y el cerebro
Aprendizaje y memoria
Margaret Semrud-Clikeman, PhD, LP, ABPdN, Facultad de Medicina de la Universidad de Minnesota
El cerebro comienza a madurar incluso antes del nacimiento. Aunque continúa madurando a lo largo de la mayor parte de la vida, el cerebro no madura al mismo ritmo en cada individuo.
Esto no debería sorprender. Después de todo, nuestros cuerpos crecen a diferentes ritmos: llegamos a la pubertad a diferentes edades y a nuestra madurez emocional en diferentes momentos también.
Explanation:
Which of the following is one stage of the cell cycle?
Cellular respiration
Mitosis
Multiplication
Photosynthesis
Answer:
THE ANSWER IS B
Explanation: