What is the name for the average time needed for half the nuclei in a sample of a radioactive substance to undergo radioactive decay?
A. half-life
B. half-year
C. half-death
D. half-month
When milk goes sour, what type of change has happened?
a. physical only
b. chemical only
or
c. physical and chemical
The earthworm's_______ vessel acts as a pump to push blood throughout the body.
Hope that helps! ★ If you have further questions about this question or need more help, feel free to comment below or post another question and send the link to me. -UnicornFudge aka Qamar
Facilitated diffusion and ________________ are alike since neither requires energy. A) endocytosis B) phagocytosis C) active transport D) simple diffusion
Answer:
CCCCCCCCCCCCCC
ACTIVE TRANSPORT
Facilitated diffusion and simple diffusion are similar in that they are passive transport mechanisms that do not require energy, with the difference being that facilitated diffusion uses carrier proteins.
Facilitated diffusion and simple diffusion are alike since neither requires energy. The correct answer is D) simple diffusion. Facilitated diffusion and simple diffusion are both passive transport mechanisms that allow substances to move across the cell membrane without the need for cellular energy (ATP). However, facilitated diffusion differs from simple diffusion as it involves carrier proteins that help larger or less permeable molecules pass through the cell membrane. In contrast, active transport mechanisms like endocytosis, phagocytosis, and ion pumps require energy to move substances against their concentration gradient.
The cell membrane around a cell forms a barrier that protects and regulates the cell. Certain chemicals can pass through the plasma membrane because they have similar chemical properties as the membrane. Which best describes those that can pass through? They are concentrated. They are soluble. They are diluted. They are heated
Answer:
They are soluble. Often, they are of an appropriate polarity and size as well.
Explanation:
Answer:
B:They are soluble
Explanation:
its right on edg 2021
How might the surface area to volume ratio affect the ability of a cell to take in and use nutrients from its environment?
Lucia is given a picture of several cells. Her task is to identify the cells as plant or animal cells. How can she pinpoint the cells that are plant cells? A) She should look for a cell membrane surrounding the cell. B) She should look for cytoplasm that is filled with organelles C) She should look for a large nucleus in the center of the cells. D) She should look for ovals full of green dots called chloroplasts.
Answer:
d
Explanation:
She should look for ovals full of green dots called chloroplasts.
The correct option is She should look for ovals full of green dots called chloroplasts.
What is cell?
Cell is the basic unit of life. There are two types of cell. Plant cell and animal cell. Plant cell is the basic unit of kingdom plantae.
The fundamental unit of life in species belonging to the kingdom Plantae is the cell. They are eukaryotic cells, which have specialized components called organelles and a real nucleus that performs several duties.
Chloroplasts are unique organelles found in plant cells that use photosynthesis to produce carbohydrates. They also have a cell wall, which serves as support for the structure.
Therefore, The correct option is She should look for ovals full of green dots called chloroplasts.
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what is a type of tissue that both plant and animals have??
A.nerve
B.ground
C.protective
D.connective
How is the world population projected to change in the next few decades? a. It is projected to level off. b. It is projected to decrease steadily. c. It is projected to increase steadily. d. It is projected to double within 5 years. Please select the best answer from the choices provided A B C D
The correct answer is option c. It is projected to increase steadily.
Explanation;
The current population of the world is estimated as more than 7.2 billion. The population is projected to be increased by 1 billion and has also estimated to cross 9.6 billion by the end of the year 2050. So, the population is increasing at a steady rate. In the total population increase, the contribution of the developing countries would be more.
The best answer is that it is projected to increase steadily, which is option C. According to the United Nations, the world population is projected to increase from 7.9 billion in 2021 to 9.7 billion in 2050 and reach 10.9 billion by the end of the century.
What is the population of the world?The world population is projected to increase steadily in the next few decades due to a combination of factors such as continued improvements in healthcare, increasing life expectancy, and high fertility rates in some parts of the world. According to the United Nations, the current global population is around 7.9 billion people, and it is expected to reach 9.7 billion by 2050 and 10.9 billion by the end of the century.
Hence, the best answer is that it is projected to increase steadily, which is option C. According to the United Nations, the world population is projected to increase from 7.9 billion in 2021 to 9.7 billion in 2050 and reach 10.9 billion by the end of the century.
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What has prokaryotic cells?
Onion root
Cows liver or
Human blood
Answer:E coli
Explanation: Which is kinda ironic considering it not even on here
The point in the Moon's orbit when it's farthest away from the Earth is called A. perigee. B. apogee. C. penumbral. D. eclipse.
How would you identify glacial sediments from alluvial (stream) sediments? Also, could certain glacial sediments be mistaken for alluvium?
What stage of cellular respiration produces pyruvate as a product? (2 points)
Glycolysis
Electron transport chain
Krebs cycle
Fermentation
Answer:
The answer is A, glycolysis.
Explanation:
The scientific name for the dog is Canis lupus. The scientific name for the domesticated cat is Felis catus. Dogs and cats live together, play together, but they do not have offspring together. A cat and a dog can not produce fertile offspring because they are not the same A.class B. domain C. phylum D. species
The correct answer is option D. species.
It is the individuals of a species which can interbreed to produce fertile off springs. This concept is known as biological species concept. The individuals from different species cannot produce fertile off springs even if they mate. It happens because the eggs produced by the female of a particular species is compatible with the sperms of male of that particular species only. Even if through mating, sperm of a dog will reach the egg of a cat who belongs to another species, it will not be able to fuse with the egg. For fusion of egg and sperm their compatibility is must & they are compatible only if the male and female are of same species.
There are some exceptions to this concept like liger is an off spring which is produced when a male lion mates with a female tiger even though they both belong to different species. But, even though they are able to reproduce an off spring yet this off spring is not fertile.
how are ATP and glucose similar
ATP and glucose are similar as they both store energy that can be used by cells. ATP provides immediate energy for cellular work whereas glucose is broken down to produce ATP during cellular respiration. Both play a crucial role in powering cellular activities.
Explanation:ATP (Adenosine triphosphate) and glucose are both essential for life because they provide energy for cells. They are similar because they both store energy that can be used by cells. ATP is considered the main energy currency of the cell, it is produced from glucose during cellular respiration and it provides immediate energy for cellular work. On the other hand, glucose is a simple sugar that is broken down during the process of glycolysis to produce ATP.
Essentially, the energy stored in glucose is transferred to ATP during the process of cellular respiration. Therefore, both ATP and glucose play a critical role in powering cellular activities.
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Why do you need your respiratory system to live? Explain.
Explain in your own words why a roller coaster has gravitational energy.
What causes tides to occur in the ocean?
the latin word porus means passage. how does this meaning relate to the pores of the skin
The word porous is related to the pores of skin. Skin which has small openings in the skin are called as porous skin.
What is Porous skin?Pores are the small openings which are present at the top of hair follicles that covers the entire body surface. The pores release sebum, the body’s natural oil, to naturally moisturize the skin to help keep it supple and smooth. Although the large pores on the skin can be frustrating, pores are necessary for the maintaining healthy skin.
Usually, genetics determine the larger pores. However, the oily skin, sun damage and aging can be other factors which make the body pores look bigger.
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Bacteria perform a specific type of asexual reproduction, which is called
Answer:
binary fission is the answer
Explanation:
7) When an experiment is repeated and the new results are different from the original results, what could you assume to be true? A) The results from both experiments are worthless. B) The first experiment's results are worthless and should be discarded. C) The experimental design is flawed and the experiment should be discarded. D) Neither test results are 100% reliable and additional experimentation is needed.
D) Neither test results are 100% reliable and additional experimentation is needed.
Explanation:
The given scenario implies that neither test results are 100% reliable and additional experimentation is needed. The correct option is D.
What is an experiment?Experimentation is a research method that involves consciously manipulating one or more variables and observing the outcome or effect of that manipulation on other variables.
Controls are frequently used in experimental designs to provide a measure of variability within a system as well as a check for sources of error.
An experiment is a scientific investigation in which a hypothesis is tested. An experiment involves manipulating an independent variable (the cause) and measuring the dependent variable (the effect); any extraneous variables are controlled. The fact that experiments should be objective is an advantage.
The experimental method's goal is to provide more definitive conclusions about the causal relationships among the variables in a research hypothesis than correlational research can.
Here in the given scenario, the experiment is repeated and is not getting the proper result, which implies that both the experiments are needed to be worked again.
Thus, the correct option is D.
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Which structure is found only in plant cells and functions in the process of photosynthesis
A.W
B.X
C.Y
D.Z
Rabbits have overrun a community garden and are eating everything in it. Which of the following would be the
A) Hawks
B) Poison
C) Traps
D) Hunting
True or false: If a product has no added sugar, it is also sugar-free.
"It is best to go skiing in January. It snows most of the month of January" This refers to the area's ______ weather or climate?
"I'd better put on my galoshes" it's going to be a wet one" This refers to the area's ______ weather or climate?
"I was going to wear my favorite dress today ,but I looked out my window and saw the trees blowing in the wind. I figured it would be windy most of the day." This refers to the area's ______ weather or climate?
The first statement about skiing in January refers to the area's climate, which is long-term weather patterns, while the other two statements about wearing galoshes and the windy conditions refer to the day's weather, which are the current atmospheric conditions.
The sentences you've provided refer to the concept of weather and climate, two different aspects of atmospheric conditions. Let's clarify each statement:
"It is best to go skiing in January. It snows most of the month of January" refers to the area's climate. Climate is the average weather conditions in an area over a long period, and if it snows often in January, that's a climatic pattern."I'd better put on my galoshes; it's going to be a wet one" refers to that day's weather. Weather is the short-term atmospheric conditions, and this statement talks about the expectation of rain for the day."I was going to wear my favorite dress today, but I looked out my window and saw the trees blowing in the wind. I figured it would be windy most of the day." This again refers to the day's weather, as it describes the immediate conditions that are affecting what the speaker might wear.In essence, climate is what you expect, like snow in January in Wisconsin, while weather is what you get, like a rainy or windy day.
what occurs during meiosis that does not occur during mitosis?
A.Chromosones are passed to the offspring
B.A cell is divide in half
C.The chromosome number is divided by half
D.Two sex cells combine
The answer is D). trust me
Meiosis differs from mitosis in that it halves the number of chromosomes to produce haploid cells, introduces genetic variation through crossing over, and occurs only in specific cells to produce sex cells.
Meiosis, a type of cell division specific to sexual reproduction, has distinct processes not found in mitosis.
The major characteristic of meiosis that differentiates it from mitosis is that the chromosome number is reduced by half.
This happens through a series of two nuclear divisions resulting in four daughter cells, each containing only half of the parental chromosomes - making them haploid cells.
Another unique process in meiosis, not present in mitosis, is crossing over or recombination that occurs in the first phase (prophase I), where homologous chromosomes pair and exchange sections of DNA.
This introduces genetic variation within the offspring, a feature absent in mitosis which produces genetically identical cells.
Lastly, meiosis occurs in specific cells (in the testes in males and ovaries in females), creating sex cells (gametes), whereas mitosis happens in all body (somatic) cells.
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Which of these experiments would make use of qualitative data?
A study of different surfaces to compare ability to repel water
A study of different shapes to compare rolling friction values
A study on the effects of sunlight on the growth rate of plants
A study on the change in freezing point of water when salt is added
I believe that the correct answer is the first answer: A study of different surfaces to compare ability to repel water
Enzymes are proteins. What would happen to the enzymes of your body if your body temperature started to rise to an abnormally high degree?
A.The enzymes would become denatured and their active sites would lose their shape causing them not to work.
B.The enzymes' substrates would become changed in shape and no longer fit the active sites of the enzyme.
C.Nothing, the enzymes would be fine because they are very stable molecules.
D.The enzyme would become larger than the substrate but would still continue to work, just not as well
A wildlife researcher wants to know how a species of fox behaves in its natural habitat. The researcher should A. observe the foxes in their environment. B. perform an experiment on the foxes. C. make a model of the foxes and their habitat. D. observe the foxes in a laboratory.
What is the material within the nucleus that carries the instructions to build proteins