Answer:
viruses can be used to target and kill cancer cells, to treat a variety of genetic diseases as gene and cell therapy tools, or to serve as vaccines or vaccine delivery agents.
Explanation:
Francis thinks that the longer a plant is in light, the more fruit it will produce. He places one group of ten plants under a UV light for six hours and another group of ten plants under the same light for eight hours. He waters the plants with the same amount of water at the same time every day; uses the same types of plants, soil, and containers; and monitors the same temperature
Answer:
Choose the correct label for each part of the experiment.
The plants that are under a UV light for eight hours
A. Experimental group
The amount of water that is given to all of the plants
D. controlled Variable
The plants that are under the light for six hours
B. Control Group
Explanation:
Pathogens that are catalase-positive, such as Mycobacterium tuberculosis, Legionella pneumophila, and Campylobacter jejuni, make catalase in order to deactivate harmful peroxide radicals, thus allowing them to survive unharmed within the host cell. Which of the following are features of the catalase enzyme?
a. endoenzyme
b. inducible
c. extracellular enzyme
d. constitutive
Answer:
B)inducible
C. )extracellular enzyme
Explanation:
Catalase is an enzyme that is engaged during the the decomposition of hydrogen peroxide to form water and oxygen, it is posses by all living organisms because of their exposure to oxygen, hence it protect the cell from oxidative damage by reactive oxygen species.
Catalase enzymes function in our liver by breaking down harmful hydrogen peroxide into oxygen and water ,during this reaction , the bubbles of oxygen gas that escape create a foam that will help to disinfect any surface touch by the raw liver during this process. Catalase enzymes are extracellular enzyme and are inducible.
Explain how your parents, grandparents, & great grandparents may affect what proteins your cells are able to make.
Final answer:
Proteins are responsible for cell functions and structure. Genes and epigenetic changes can be influenced by parents, grandparents, and great grandparents, affecting the proteins cells can make.
Explanation:
Proteins are responsible for orchestrating nearly every cell function. They determine the structure and function of cells. Your parents, grandparents, and great grandparents can affect what proteins your cells are able to make through their DNA and epigenetic changes.
Genes in DNA provide instructions for making proteins with the correct sequence of amino acids.
Epigenetic changes can determine whether genes are turned on or off, affecting the production of proteins in certain cells.
The unique genetic makeup and environmental factors of your ancestors can influence the proteins your cells are able to produce.
Why is “humans have little to no effect on species” a misconception?
Answer:
Because they take over animals home, food, and lives with poaching, deforestation and pollution.
Explanation:
PLEASE HELP
1. Which description best summarizes the steps that take place during black hole formation, in the correct order?
Supernova explodes a massive star; remaining core expands; nuclear reactions diminish the effects of gravity.
Supernova triggers fusion reactions; massive star implodes due to extreme radiation; volume and mass of star increase rapidly.
A massive star depletes its nuclear fuel; gravity overpowers the star; supernova occurs; core of star collapses.
A small star gains mass through fusion reactions; core of star collapses; increased radiation triggers a supernova.
2. Astronomers think that most galaxies are centered by a (nebula, large planet, black hole, massive star), which exerts (centripetal force, magnetic pull, gravitational pull, centrifugal force) that binds the galaxy together.
3. Where would scientists look to observe a black hole?
The center of the Milky Way
The center of the sun
The solar system asteroid belt
The edge of the solar system
Answer:
1. A massive star depletes its nuclear fuel; gravity overpowers the star; supernova occurs; core of star collapses
2. black hole; gravitational pull
3. The center of the Milky Way
Explanation:
The description that summarizes the steps that take place during black hole formation, in the correct order is C. A massive star depletes its nuclear fuel; gravity overpowers the star; supernova occurs; the core of the star collapses.
Astronomers think that most galaxies are centered by a black hole which exerts a gravitational pull that binds the galaxy together.
In order for scientists to observe a black hole, they should look at the center of the Milky Way.
Black hole simply means the region of spacetime where there's a strong gravity such that there's no electromagnetic radiation or particles that can escape.
It was believed that black holes were formed after the Big Bang when there was a collapse of the center of a massive star. The formation is that a massive star depletes its nuclear fuel; gravity overpowers the star; supernova occurs; the core of the star collapses
In order for scientists to observe a black hole, they should look at the center of the Milky Way which is the hit collection of gas, stars and dust.
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How does the circulatory system help the digestive system?
An ecosystem is self-sustaining as long as organisms have sufficient quantities of energy, oxygen, minerals, and water. When organisms die, some of these materials are recycled back to plants in the ecosystem primarily through the activity of:______.(1) predators (2) pathogens(3) decomposers (4) parasites
What happens immediately after pyruvate is brought into the mitochondrion?
A. Acetyl CoA forms.
B. 36 ATP molecules form.
C. Glucose molecules form.
D. FADH2 molecules form.
Answer:
The answer is A: Acetyl COA forms
Explanation:
Sponges have no “true tissues.” What does this mean?
A.
They perform body functions by diffusion.
B.
They have organs for specific functions.
C.
Similar cells do not cooperate together.
Answer:
C.
Similar cells do not cooperate together.
Explanation:
A river's current carries sediments into the ocean. Which sediment size will most likely be deposited in deeper water farthest from the shore? *
A) Clay
B) Pebbles
C) Sand
D) Silt
Answer:
D IS THE ANSWER
Explanation:
I got the answers to the questions right
The sediment size that will most likely be deposited in deeper water farthest from the shore is the slit. That is option D.
Sediment deposition occurs when suspended particles settle down to the bottom of a body of water.
These suspended particles include:
Clay Clay pebblesClay pebblessandClay pebblessandslits andgravels.These particles depending on their weight or mass and the speed of water flow settles or deposits faster than the other.
In high flow areas, larger, gravel-sized sediment will settle out first.
Finer particles, including silt and clay, can be carried all the way out to the ocean.
Slit is lighter in weight than clay therefore will be deposited in deeper water farthest from the shore.
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Why are organisms classified
Answer:
All living things are organized into groups by scientists as they are identified. ... Different scientists use various systems of classification to organize all living things into groups. Overall, the reason scientists classify living things is to understand the relationships between different organisms.
Explanation:
Which word in this sentence could be replaced with a personal pronoun?
Gina felt very nervous before giving her speech.
Gina
very
before
giving
Answer:
Gina
Explanation:
Answer: Gina
Explanation:
Use the drop-down menus to answer the questions. In which stage of the cell cycle does the division of the cytoplasm occur? In which stage of the cell cycle does replication of DNA occur? In which stage of the cell cycle does the division of the nucleus occur?
Answer:
cytokinesis - interphase - mitosis
Explanation:
just took this on edge
In which stage of the cell cycle does the division of the cytoplasm occur?
✔ cytokinesis
In which stage of the cell cycle does replication of DNA occur?
✔ interphase
In which stage of the cell cycle does the division of the nucleus occur?
✔ mitosis
Which of the following statements regarding cnidarians is true? The digestive and circulatory compartment of cnidarians is called the gastrovascular cavity. Cnidarians have three true tissue layers. Cnidarians are herbivores and can be destructive grazers on seaweeds. The more stationary cnidarian body form, which is cylindrical with a ring of tentacles, is the medusa.
The last one I think xd
The digestive and circulatory compartment of cnidarians is called the gastrovascular cavity. So, the correct option is (A).
What are Cnidarians?The word Cnidaria derive from the Greek word "cnidos," which means stinging nettle.
Cnidaria is the phylum which comes under Kingdom Animalia. This phylum contains over 11,000 species of aquatic animals found in both freshwater and marine environments. Their specialty is cnidocytes which are specialized cells which they use mainly to capture prey.
The gastrovascular cavity is defined as the major site for digestion of food and absorption of nutrients in cnidarians in which food passes through the mouth and enters the cavity. Inside the gastrovascular cavity, there is a cell membrane that wraps around food particles and then moves them into the internal cavity.
Thus, the digestive and circulatory compartment of cnidarians is called the gastrovascular cavity. So, the correct option is (A).
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what is carrying capacity
Answer:
B) The largest population an area can support
What is it called when plants give off water vapor as a waste product?
Answer:
transpiration
Answer: transpiration
Explanation:
Enter your scientific design in the space below.
Answer:
Divide plants into two groups of twenty-five. Plant twenty-five seeds in pots with potting soil without compost; this is the control group. Plant the other twenty-five in pots with potting soil and a specific amount of compost added; this is the experimental group. Place the pots under grow lights. After germination, measure the height of the plants at set intervals (e.g., every two days) for a set amount of time (e.g., two weeks). The IV is the presence or absence of compost. The DV is the height of plants. Twenty-five plants per group is a good sample size; all obvious variables are controlled. The experiment is simple and specifically described, so it can be replicated. The seeds were assigned randomly; there is no obvious bias in the experiment.
Answer:
Divide plants into two groups of twenty-five. Plant twenty-five seeds in pots with potting soil without compost; this is the control group. Plant the other twenty-five in pots with potting soil and a specific amount of compost added; this is the experimental group. Place the pots under grow lights. After germination, measure the height of the plants at set intervals (e.g., every two days) for a set amount of time (e.g., two weeks). The IV is the presence or absence of compost. The DV is the height of plants. Twenty-five plants per group is a good sample size; all obvious variables are controlled. The experiment is simple and specifically described, so it can be replicated. The seeds were assigned randomly; there is no obvious bias in the experiment.
Explanation:
Edg 2022 >:)
Fascioloides magna is an animal that lives in the livers of deer in the southeastern United States. It has a bilaterally symmetrical, flattened leaf-like body with a digestive tract with a single opening. It also lives in a snail for part of its life cycle. This animal is most likely a _____.
Answer:
Fluke
Explanation:
A fluke is referred to as trematode, a type of parasitic worm that belong to phylum plathyhelminthes. A fluke has a flattened body structure with about few centimetres long. Flukes do not possess an excretory system, but possess a digestive tract with just one opening that serves as both mouth and anus. Also, they do not posses respiratory organs .
Flukes possess a body surface that enables it inhabit the digestive system of larger animals and also avoid the effect of digestive enzymes.
These parasitic worms can be found to infect vertebrates and molluscs, such as snails. An example of a fluke is Schistosoma haematobium.
Once the body has begun shivering, what happens to make it stop shivering?
A)When body temperature returns to normal, the respiratory system sends a message to the skeletal system to stop shivering.
B)When body temperature returns to normal, the nervous system sends a message to the muscular system to stop shivering.
C)When body temperature is below normal, the nervous system sends a message to the skeletal system to stop shivering.
D)When body temperature is below normal, the respiratory system sends a message to the muscular system to stop shivering.
Answer:
B
Explanation:
Brain/nervous system in charge of everything
Shivering stops when the hypothalamus in the brain signals that body temperature has returned to normal, prompting the nervous system to halt the muscle contractions.
Explanation:When the body begins to shiver due to cold, this is part of a process called thermoregulation, coordinated by the nervous system to maintain homeostasis. The hypothalamus in the brain detects that the body temperature is below its set point and initiates shivering to generate heat. Shivering involves rapid contractions of the skeletal muscles, which help to increase body temperature. Once the temperature returns to the normal range, the hypothalamus sends signals, via the nervous system, to stop the shivering response.
Therefore, the correct answer to the question is B) When body temperature returns to normal, the nervous system sends a message to the muscular system to stop shivering.
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What are some facts about the coral reefs useful for a presentation
By which processes are rocks broken up and moved to different locations?
A) Burial and cementation
B) Evaporation and condensation
C) Compaction and transportation
D) Weathering and erosion
Answer:
D.) Weathering and erosion
Explanation:
Weathering is the breaking down of rocks through (usually) natural processes such as rain, wind, etc.
Erosion is the process in which the sediments of these rocks are carried away through natural process.
Which of the following best explains why the number of organisms at each level decreases while moving up the energy pyramid? A. The animals at each level use energy, so only a small amount of their energy is available to the next level. B. The animals at each level have more predators, so they produce more offspring. C. The animals at higher levels are more competitive, so fewer animals survive. D. The animals at higher levels move more than animals at lower levels, so they require more energy.
Answer:
The animals at each level use energy, so only a small amount of their energy is available to the next level.
Explanation:
I did it on Study Island
An energy pyramid is a graphical representation of the energy in the trophic levels of an ecosystem. The animals at each level use energy, so only a small amount of their energy is available to the next level due to this, the number of organisms at each level decreases while moving up in the energy pyramid.
What is an energy pyramid?The energy pyramid shows the flow of energy from one trophic level to the other which is always upright.
The four levels of energy pyramids are:
Producers.Primary consumers.Secondary consumers.Tertiary consumers.The animals at each level use energy, so only a small amount of their energy is available to the next level. It means the energy is lost after each trophic level.
Due to this decrease in energy level at the successive levels, the number of organisms decreases while moving up in the pyramid of energy.
Thus, the correct option is A.
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Signal to which an organism responds
A stimulus is a signal to which an organism responds. Stimuli can be internal like hunger or thirst, or external like change in temperature or light. An organism's evolutionary adaptations often determine its responses to these signals.
Explanation:A signal to which an organism responds is known as a stimulus. Stimuli can be external or internal. External stimuli include changes in the environment like temperature, light, or sound. Internal stimuli come from within the organism itself, such as hunger or thirst. An organism's response to a stimulus is often a result of adaptations developed over time. This reactionary process is a critical aspect of an organism's survival and continued existence.
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Organisms respond to signals or stimuli surrounding them in their environment. These reactions can be a movement towards or away from the stimuli or diverse forms of communication within species. Even single-celled organisms like bacteria can process and respond to environmental signals.
Explanation:The signal to which an organism responds can vary widely, but generally, it refers to environmental cues or stimuli which trigger a reaction or response in the organism. Sensitivity or response to stimuli is an inherent characteristic of living organisms, emphasizing their ability to interact with their surroundings. This response can include movements towards or away from the source of stimuli (positive or negative response).
For instance, a plant might respond positively to a light source by bending towards it, a reaction known as phototaxis. Likewise, bacteria can move towards or away from chemical sources (chemotaxis) or light (phototaxis).
Communication within species also involves the use of signals as stimuli. Particularly, animals engage in communication using signals that could be visual, aural(sound), chemical (like pheromones), or tactile(touch). In some species such as the three-spined stickleback, a red region in the lower half signals males to become aggressive and females to mate. These stimuli-based responses can be instinctual, learned, or a mix of both.
Single-celled organisms, like bacteria, are also capable of signal processing. They respond to environmental signals like nutrient levels by using intracellular signaling, and sometimes, they release molecules as signals to communicate with each other.
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Are you optimistic or pessimistic about the future of our planet? why
I am pessimistic about the future.
What is planet?Weather events affect both the natural and constructed ecosystems in many nations, but their effects are disproportionately felt in underdeveloped nations and vulnerable groups.
For skill-based employees, such as farmers and factory workers, who also frequently reside in places more susceptible to weather catastrophes, changes to supply chains, agriculture, and employment have disastrous effects.
According to Professor Diego Ramrez-Lovering of Monash University, we must consider the three pillars as a component of a single system. He claims that "habitat, health, and equality" are all intricately related.
Therefore, I am pessimistic about the future.
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Views on the future of our planet are mixed, with pessimism arising from ecological challenges and optimism from technological and social progress. The determinants of our planet's future include current environmental issues, nascent technological solutions, and the proactive engagement of society.
Explanation:The question of whether one is optimistic or pessimistic about the future of our planet delves into a complex analysis of current environmental, technological, and societal trends. Pessimistic views often stem from the serious challenges we face: ecological collapse, socioeconomic disparities, and the proliferation of weapons of mass destruction. These are exacerbated by the tremendous increase in atmospheric CO₂ since the 1970s and a prevalent culture that prioritizes economic growth without ample regard for ecological realities.
However, there is also room for optimism. The rapid growth of knowledge and technological advancements, like CRISPR and alternative energy sources, could help us manage and mitigate some of these challenges. Furthermore, the activism of concerned scientist-citizens and the demands for systemic change from new generations provide a glimmer of hope that effective global collaborations may arise to address the sustainability of human life on Earth.
Finally, while economics and history show us that predicting the future is fraught with uncertainty, the point made by techno-optimists is salient: we have repeatedly transcended past limitations through innovation and adaptation. So, despite the gravity of the issues, the potential for human ingenuity and social engagement remains a critical counterpoint to a strict pessimistic outlook.
Food webs show the movement of energy through an ecosystem. The energy decreases as it moves from organism to organism. Where does the energy originally come from?
Answer:
the sun
Explanation:
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What is the best definition of Thebes term “theory”as it is used in science
The best scientific definition of Thebes' term "theory" is a well-substantiated explanation of some aspect of the natural world obtained through the scientific method after observation and experimentation.
What is the significance of this scientific theory?Scientific theory has many implications, as the science provides a comprehensive and consistent explanation, and a theory can make accurate predictions about new observations and experiments and help in the continuation of further scientific research. Scientific theories have practical applications to solve real-world problems, such as in the medical field with technologies, etc.
Hence, the best scientific definition of Thebes' term "theory" is a well-substantiated explanation of some aspect of the natural world obtained through the scientific method after observation and experimentation.
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Final answer:
A theory in science is a well-supported comprehensive explanation of natural phenomena, akin to a fact, and is vital for making predictions about the natural world. It is much more than a guess, distinguishing it from the everyday use of the term 'theory'.
Explanation:
In the context of science, the term theory refers to a comprehensive explanation of an important feature of nature that is supported by a substantial body of evidence. It's important to distinguish this scientific use of the term from the way 'theory' is used colloquially, where it might just mean a guess or speculation. Scientifically, a theory is akin to a fact and represents our most reliable understanding of natural phenomena. Examples of scientific theories include the theory of evolution, cell theory, and germ theory.
The United States National Academy of Sciences defines a theory as a well-established scientific explanation that is unlikely to be altered by new evidence. This conceptual framework allows scientists to make predictions about phenomena that have not yet been observed, placing theories at the bedrock of scientific understanding of the natural world.
Why do you get less energy from 100 calories of celery than you would from 100 calories of chips?
Answer:
chips are a simple carbocarbohydrate and celery is a complex carbocarbohydrate
Explanation:
how does the west nile virus spread?
Answer:
West Nile virus is most commonly spread to people by the bite of an infected mosquito. Mosquitoes become infected when they feed on infected birds. Infected mosquitoes then spread West Nile virus to people and other animals by biting them.
Explanation:
4 What is a difference between prokaryotic and eukaryotic cells? A. Prokaryotic cells always have cell walls, but eukaryotic cells do not. B. Eukaryotic cells do not have membrane-bound organelles, but prokaryotic cells do. C. Prokaryotic cells do not have a nucleus, but eukaryotic cells do. D. Organisms with eukaryotic cells are always multicellular, but organisms with prokaryotic cells are not.
Answer:
d
Explanation:
i learned this a week ago
You discover a new species of aerobic, mixotrophic protist that can perform photosynthesis in fairly deep water (for example, 250 m deep). It can also crawl about and engulf small particles. Which two characteristics does your protist have to have in order to successfully complete these tasks?
1. hydrogenosome
2. apicoplast
3. pseudopods
4. chloroplast from red alga
5. chloroplast from green alga
A) 1 and 2
B) 2 and 3
C) 2 and 4
D) 3 and 4
E) 4 and 5
Answer:
D) 3 and 4
Explanation:
Pseudopods is a tool for movement in many protists such as amoeba. Pseudopods is the extension of cytoplasm which enables the organism to move from place to place and capture the food by engulf small particles. This protists has chloroplast because chloroplast is responsible for the production of food materials from sunlight in the process of photosynthesis.