Answer:
Consider two solutions of different sodium concentrations separated by a selectively permeable membrane. The net movement of water across the membrane will be from the area of high sodium concentration to the area of low sodium concentration
Explanation:
In this process, only water molecules can pass through the selectively permeable membrane. As the solution has different concentrations of solute, the water molecules will move from the more concentrated solution to the less concentrated solution. The process is called osmosis and is completed when both solutions have the same concentration.
A __________ is an example of a signal molecule that can bind to an intracellular receptor and thereby cause a gene to be turned on or off. a protein b glyceride c nucleic acid d steroid e carbohydrate
Answer:
D. steroid
Explanation:
Intracellular receptors are a type of receptors located inside the cell, specifically in the cytoplasm or nucleus. When intracellular receptors are activated by ligands called SIGNALLING MOLECULES, they change shape and regulate genetic expression in the nucleus i.e. they induce turning on and off in a gene.
However, signalling molecules that activate intracellular receptors are usually hydrophobic hormones because they need to easily diffuse through the cell membrane and bind to the receptors located internally. Example of these hydrophobic signal molecules are STEROIDS.
Land plants evolved long before any animals appeared on Earth. When they came onto land, they needed ways to keep from losing water, to reach the sun, and to produce oxygen. They started to convert the atmosphere from carbon dioxide to oxygen. Which of these is believed to be the common ancestor of land plants?
A. oak trees, because they are the dominant species in many areas
B. rose bushes, because they produce a sweet-smelling aroma
C. grass, because there is so much of it found on the land
D. green algae, because they use the same photosynthetic pigments as land plants
Answer:
D. green algae, because they use the same photosynthetic pigments as land plants
Explanation:
5. As blood enters the capillaries, molecules of oxygen move from the blood into the tissues of the body. Which of the following explains this movement?
d. The concentration of oxygen in the blood is the same as the concentration of carbon dioxide in the tissues.
e. The concentration of oxygen in the blood is higher than that in the tissues f. The concentration of oxygen in the blood is lower than that in the tissues 1
g. The concentration of oxygen in the blood is the same as that in the tissues.
Answer:
The answer is e
Explanation:
Oxygen moves due to diffusion, and the diffusion of oxygen occurs from higher concentration to lower concentration that is from the blood into the tissues
Help I’ll mark u brainless
Answer:
The answer is A
Explanation:
It is A because rock, water, and sand are all abiotic , is is NOT c because algae is a biotic factor
What is an oosphere in relation to biology
Answer:
oosphere (ovum; egg cell) The nonmotile female gamete in plants and some algae. Explanation:
As part of an experiment, Riley planted six plants in regular potting soil. Six other plants were planted in potting soil with coffee grounds. The plants with the coffee grounds are the group. The plants with just potting soil are the group.
Question:
As part of an experiment, Riley planted six plants in regular potting soil. Six other plants were planted in potting soil with coffee grounds. The plants with the coffee grounds are the________ group. The plants with just potting soil are the________ group.
Answer:
As part of an experiment, Riley planted six plants in regular potting soil. Six other plants were planted in potting soil with coffee grounds. The plants with the coffee grounds are the__experimental__ group. The plants with just potting soil are the__control_ group.
Explanation:
During an experiment, data from an experimental group is compared with the data from a control group. Both groups are selected from the same pool or population, so they are identical in all aspects except for the independent variables.
The control group is used to identify any other factors influencing the results obtained in the study, apart from the modified variables of the treatment.
The experimental group is the one that receives the experimental procedure or treatment. The researcher voluntarily changes the independent variables in the experimental group to observe how they affect the group under study. These variables are kept constant in the control group, not influencing the results, while the experimental group receives the treatment. There can be several experimental groups.
In the exposed example, the coffee in the soil is acting as the treatment. And the regular soil is the unchanged environment.
Plants that grow in soil with coffee are the experimental group because the researcher wants to know how the coffee affects the plants´ growth.
Plants growing the regular soil are the control group because they are not affected by the coffee. If there is any other factor influencing the results in the regular soil, it will be revealed by these plants.
In an experiment, data from the experimental group is compared with the data from the control group.
The given blanks for the statement can be given as:
As part of an experiment, Riley planted six plants in regular potting soil. Six other plants were planted in potting soil with coffee grounds. The plants with the coffee grounds are the experimental group. The plants with just potting soil are the control group.
The experiment involves an experiment and a control group. The value from the experimental group is measured with the values obtained from the control group.
The data in both groups are selected from a similar gene pool or population.
The control group in an experiment helps in the identification of the factors influencing the probable results.
The experimental group is the one that undergoes the experimental procedure or treatment. The independent variables are voluntarily changed and the researcher observed the effects of variables in the experimental group.
The variables in the control group are constant and do not affect the results, whereas in the experimental group the variables are changed and affect the results.
For example, the coffee in the soil is a type of treatment, in which the regular soil is the unchanged environment.
Plants will grow in the environment where the coffee has been incorporated, and the researcher wants to study the impact of coffee on the growth of the plant.
Plants in the regular soil will not be affected by the coffee and are the control group. The factor influencing the results in regular soil will be expressed in the plant.
To know more about experimental and control groups, refer to the following link:
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How does RNA polymerase know where to start and stop making a strand of RNA?
Answer:
Each gene has a beginning and an end. At the beginning of each gene is a similar sequence that tells the RNA polymerase to start working. The same is true at the end of each gene where a specific sequence tells the RNA polymerase to stop transcription
Because there are three different possible reading frames in a messenger RNA (mRNA) molecule, most mRNAs can be translated in a cell into three different proteins. true false
Answer:
False
Explanation:
In the genetic code, each triplet of nucleotides (i.e., each codon) determines one specific amino acid or one-stop codon. The genetic code is not overlapping, which means that the same letter in the genetic code (nucleotide) cannot be used for two different codons. There are 64 possible combinations of triplets of nucleotides, 61 of them determine amino acids, while three triplets determine stop codons (UAG, UAA, and UGA) that indicate the termination of translation. Moreover, the genetic code is also degenerate, which means that one amino acid can be coded by more than one codon.
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Wind energy is a sustainable and renewable alternative to burning fossil fuels, with a much smaller impact on the environment.
What are some advantages of using wind as a source of energy?
Answer:
becsuse it rejects pollunation of air and environment
What is the most common type of desalination plant in the world?
Answer:
The Hadera seawater reverse osmosis (SWRO) desalination plant in Israel is the largest seawater desalination plant in the world.
A student drew the picture of a human body system shown below
Pls help its due today
Answer:
your answer would be G
Explanation:
delivering oxygen and nutrients to organs and cells and carrying their waste products away.
Or, in another way, exchange gasses with the environment.
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state whether volcanoes are evenly distributed over earth’s crust or concentrated in specific areas
Answer: Concentrated in certain areas
Explanation:
Volcanoes are usually formed as a result of collisions or other activity between plates at plate boundaries.
As a result, they are more usually concentrated in zones where there is more plate activity such as at the edges of continents, on islands and beneath the seas in certain areas because this is where plates usually collide with each other.
bacteria use this form of reproduction
Answer:
Bacteria reproduce by binary fission. In this process, the bacteria, which is a single cell, divides into two identical daughter cells.
Explanation:
Bacteria reproduce by binary fission. In this process the bacterium, which is a single cell, divides into two identical daughter cells. Binary fission begins when the DNA of the bacterium divides into two (replicates).
Hey can someone help with this question?
Answer:
I guess Comparative anatomy
Which of the following best describes the result of DNA replication?
A. Each chromosome has tripled in size and weight.
B. Each chromosome has four sister chromatids and four centrioles.
C. Each chromosome has double its initial amount of genetic material.
D. Each chromosome has outgrown its cell’s nucleus and begins to expand.
Answer:
The answer is C.
Explanation:
Because it's science.
Help! Will give brainliest to the best answer.
Using a specific example, predict and explain how the release of non-native organisms can affect local, national, and even global ecosystems.
The nucleus is surrounded by a semipermeable membrane. What would happen if this layer were permeable to most substances?
A. The DNA in the nucleus would be protected from harmful substances
B. Enzymes would not be able to speed up reactions in the nucleus.
C. The nucleus would not be able to communicate with the rest of the cell.
D. Large molecules would be able to enter and damage the nucleus.
Answer:
D
Explanation:
If the layer of nucleus were permeable to most substance, then the large molecules would be able to enter and damage the nucleus.
What is nucleus?It is a membrane-bound organelle present in the centre of cell in which thread like structures called chromatins are present which condenses to form chromosomes contains genetic material (that carries genetic information from parents to offspring).It controls all function of the cell.The layer or membrane around nucleus is called nuclear membrane is semi-permeable in nature which means that only specific molecules and ions can move across it.If the membrane would become permeable, then movement of all types of molecules will occur which will disturb the homeostasis (maintaining balance) of cell and can damage the nucleus.Hence, the correct option is: D. Large molecules would be able to enter and damage the nucleus.
To know more about nucleus here
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What is the greatest threat humans pose to biodiversity?
Answer:
habitat loss, over-harvesting, and introduction of exotic species
Explanation:
The way that people have altered natural environments to create room for farms or to collect natural resources has posed the greatest harm to biodiversity yet, but as climate change intensifies, it will have a rising influence on ecosystems.
What is biodiversity loss?The term "biodiversity loss" describes the decline in biodiversity brought on by the extinction or relocating of species. Some people might not consider the extinction of a certain species to be significant, especially if it is not a charismatic species such as the Bengal tiger or the humpback dolphin.
However, according to estimates from scientists, the present pace of species extinctions is several times higher than the background, or average, rate seen throughout Earth's history. Within our lifetimes, this amounts to the extinction of tens of thousands of species.
The breakdown of ecosystems is anticipated to have drastic repercussions on human welfare. Because of the intricate relationships between species, a loss of biodiversity may have a ripple effect on ecosystems.
One species' extinction, for instance, may result in the extermination of another. Scientists evaluate which species are in danger of extinction as well as the state of the ecosystems to gauge the loss of biodiversity.
Therefore, the way that people have altered natural environments to create room for farms or to collect natural resources has posed the greatest harm to biodiversity yet, but as climate change intensifies, it will have a rising influence on ecosystems.
Read more about biodiversity loss, here https://brainly.com/question/9634188
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The total acreage destroyed by the gypsy moth is in the
hundreds.
thousands.
millions.
billions.
Answer:
millions
Explanation:
The molecules will probably continue to move until they reach equilibrium, which is when .......
A. the molecules inside and outside are close to equal.
B. there are more molecules inside the cell.
C. there are more molecules outside the cell.
Answer:
A
Explanation:
Answer:
A. the molecules inside and outside are close to equal.
Explanation:
The molecules will probably continue to move until they reach equilibrium, which is when the molecules inside and outside are close to equal.
hi! i’ll give brainliest please help
Answer:
My Guess Is C if im wrong sorry
Explanation:
Just thinking logicaly
An invasive species of Asian carp was introduced to the Mississippi River and have thrived. It threatens to eliminate many native species of fish. Which of these could be a contributing reason why?
A
The invasive species of fish lay many more eggs than the native species.
B
The invasive species of fish eat a greater variety of foods than native fish, destroying entire ecosystems.
C
The invasive species can survive in more extreme temperatures and water with a lower oxygen concentration.
D
All of these can be contributing reasons.
Answer:
D, they are all contributing reasons.
Which of the following limits cell size? Select all of the answers that apply.
Answer:
Cell size is limited by a cell's surface area to volume ratio. A smaller cell is more effective and transporting materials, including waste products, than a larger cell. Cells come in many different shapes
Photosynthesis creates ______
A.
chlorophyll
B.
sugar
C.
carbon dioxide
D.
energy for the cell
can trees and plants cause soil erosion?
Answer:
no
Explanation:
it will not cause soil erosion because tree or plant root will handle it very strongly
Could someone please help me? When is complementary DNA produced in the body?
Answer: Complementary RNA is produced for transcription - when it is making a protein
Complementary DNA is produced when the cell is replication - Mitosis & Meiosis
Explanation:
Different versions of a trait are called...
A. Alleles
B. Loci
C. Chromosomes
D. Punnett squares
Answer:
Different versions of a trait are called...
A.ALLELES
B.LOCIC.CHROMOSOMES
D.PUNNETTT SQUARES
he following diagram shows the branching tree diagram for some animals. (5 points)
A slanting line is shown. There are five lines drawn vertically on this line at equal intervals. Shark, Frog, Kangaroo, Lion and Chimpanzee are written on top of each vertical line in order from left to right. Common Ancestor is written on the left end of the line. There is a black circle between each pair of these vertical lines. The first black circle is before Shark and says Vertebrae. The second black circle is between Shark and Frog and says Lungs. The third black circle is between Frog and Kangaroo and says Mammary gland. The fourth black circle is between Kangaroo and Lion and says Placenta. The fifth black circle is between Lion and Chimpanzee and says Large brain.
Which two organisms share the least number of derived characteristics?
Frog and kangaroo
Kangaroo and chimpanzee
Lion and chimpanzee
Shark and chimpanzee
Answer:
d
Explanation:
D is the answer hopefully this helps anyone who needs it
Maja puts a hockey puck onto ice. After a while the temperature of the hockey puck decreases. What happens to the molecules of the hockey puck when the temperature of the puck decreases?
Answer: The energy of the molecules in the hockey puck decreases.
Explanation:
When the temperature of the hockey puck decreases, then the energy of the molecules in the hockey puck decreases as well.
In this scenario, when the temperature of the hockey puck decreases, then the hockey puck will gain heat molecules and the cold energy of the molecules that are in the hockey puck will reduce.