The potential benefit that beavers contribute to the ecosystem include sources of food and habitat for some animals.
What is an Ecosystem?
This consists of all the organisms and the physical environment with which they interact.
The removal of the beavers will allow for more oxygen to be present within the ecosystem as a result of increased plant population.
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Answer:
it is A from the top
Explanation:
it on the top
In a cell that undergoes mitosis, what happens next to the chromosomes after the
nucleus breaks down and chromosomes condense in prophase?
Chromosomes replicate to make a new copy of DNA
Chromosomes line up at the middle of the cell
Chromosomes are moved to either pole of the cell
Chromosomes pair up as homologous chromosomes
After the nucleus breaks down and chromosomes condense in prophase Chromosomes line up at the middle of the cell
In Prophase the chromosomes gets shorten and thicken. After metaphase chromosomes line up in the middle of the cell. During Anaphase chromatids break apart at the centromere and move to opposite poles. Mitosis ends at telophase were two nuclei formed after nuclear envelopes wraps around each group of chromosomes.
When Mitosis is complete, the cell has two section of 46 chromosomes, each enclosed with their own nuclear membrane. The cell in the ends splits by the process of cytokinesis and create two identical clones of 46 chromosomes .
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You may be excused from some lessons in this module based on your pretest score. You will still be responsible for all lesson content on the module and segment exams. Do you feel comfortable with the content in this pretest? this is for biology
Answer:
just how you feel
Explanation: they are just asking you how you feel so its what you think.
What was the lesson going over..thats what you would write about. by writing a summary on the lesson(s) you'll be able to get a better chance of answering the question... also how did you feel about the assessments and the the topic, (in your case biology).
What is the isotope for 18 protons and 28 neutrons?
What is the main difference between endocytosis and receptor mediated endocytosis?
Answer:
Explanation:
endocytosis take particles to the cell that are too large to passively cross the cell membrane .phagocytosis is the talking in of large food particles while pinocytosis take in liquid particles .receptor mediated endocytosis use special receptor proteins to help carry large particles across cell membrane .
Answer:
the particle coming into the cell first binds to a protein on the cell membrane.
Explanation:
All of the following are found only in plant cells except
a. Large central Vacuoles
c. Cell walls
b. Chlorophyll
d. Chloroplast
Answer:
There is no answer to that.
Explanation:
Chlorophyll is located in the chloroplast, and it is a crucial component in green plants for photosynthesis.Cells walls are present in plant cells only.Large central vacuoles are part of plant cells, too.None of the options are correct.
Vacuoles are also present in both the animal cells and plant cells. Therefore, option (A) is correct.
What is a plant cell?A plant cell is a type of cell that is found in plants. It is similar to an animal cell in many ways, but there are also some important differences. Like animal cells, plant cells have a cell membrane, cytoplasm, and genetic material (DNA) contained in a nucleus. However, plant cells also have some unique features that are specific to plants.
One key feature of plant cells is the presence of a cell wall. The cell wall is a rigid structure that surrounds the cell membrane and provides support and protection for the cell. It is made up of cellulose fibers and other structural proteins.
Plant cells also contain organelles called chloroplasts, which are responsible for photosynthesis, the process by which plants convert sunlight into energy. Chloroplasts contain pigments called chlorophyll, which absorb sunlight and use it to convert carbon dioxide and water into glucose (a sugar) and oxygen.
Plant cells also contain other specialized organelles, such as mitochondria, which are responsible for producing energy for the cell, and vacuoles, which are large, membrane-bound structures that store water and other substances.
Overall, plant cells are important for a variety of functions in plants, including providing structural support, producing energy, and performing photosynthesis.
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Where is the nucleus of an atom found and what does it contain?
The nucleus is in the center of the atom and it contains protons and neutrons.
Answer:
An atom is composed of two regions: the nucleus, which is in the center of the atom and contains protons and neutrons, and the outer region of the atom, which holds its electrons in orbit around the nucleus.
Hope this helps...
Different forms/versions of a particular gene are called
Answer:
Alleles
Explanation:
Different versions of genes are alleles.
A company wants to test a new dog food that is supposed to help overweight dogs lose weight. 50 dogs were chosen to try the new food and 50 other dogs were chosen to continue their normal diets. After one month, the dogs are checked to see if they lost any weight. What is the Dependent Variable?
Answer:
The dependent variable is the weight of the dogs
Explanation:
The dependent variable is the variable that is been tested during the course of an experiment. The dependent variable will usually produce different unpredictable "values" which will form the essence of the experiment. Also, the dependent variable is usually dependent/relies on the independent variable.
From this description, the dependent variable is the weight of the dogs as this is the variable that is been tested.
Which statement is true about bacterial cells? *
O The Wells are very large
The cells have no nucleus
O They are eukaryotes
O They have organelles
Answer:
They have no nucleus.
What molecule do plants pull from the air that is used to make sugar?
A.Oxygen
B.Nitrogen
C.ATP
D.Carbon dioxide
Answer:
carbon dioxide is what the plants take from the air to make glucose or sugar
The molecules that the plants pull from the air that is used to make sugar are carbon dioxide. The correct option is D.
What is carbon dioxide?
Carbon dioxide is a gas that is present in the atmosphere at 0.03 %. This gas is a greenhouse gas. This gas warms the environment. The chemical formula of carbon dioxide is CO₂.
Carbon dioxide is released by animals as they respire. This is the gas they expelled out in respiration. But plants absorb this gas because plants perform photosynthesis and in photosynthesis, carbon dioxide is used.
This gas is pulled from the environment to perform photosynthesis by plants. Carbon dioxide reacts with water to form glucose.
The chemical reaction of photosynthesis
[tex]\rm CO_2 + 6H_2O \rightarrow C_6H_1_2O_6 + 6O_2.[/tex]
Thus, the correct option is D. Carbon dioxide.
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The chemical equation should be written in latex.
Which statement best describes a genomic library?
many small pieces of circular, double-stranded DNA that replicate independently of chromosomes contained in a nucleus
a collection of DNA sequences are arranged on a microscopic grid
a large collection of bacteria that are engineered to contain fragments of an organism's complete genome
an initial amount of DNA can be multiplied into millions of copies
Answer:
An initial amount of DNA can be multiplied into millions of copies
can a solution with a molarity of 0.2 be in equilibrium with a solution with a molarity of 0.4
Answer:
Yes.
Explanation:
There are two components to water potential: solute concentration and pressure. ... Can a solution with a molarity of 0.2 be in equilibrium with a solution with a molarity of 0.4? Two solutions will be at equilibrium when the water potential is the same in both solutions.
What did the soil conservation act of 1935 call for?a. Poor farming practices and loss of farming soil. B. A national soil and water conservation program. C. A federal bureau to regulate the use of ferderal lands. D. Planting native grasses and trees instrad of crops
Answer:
planting native grasses and trees instead of crops
Explanation:
if humans were wiped out and allowed room for a new dominant species, out of all animals listed which one would have the most potential to do so?
Answer:
the raven
Explanation:
octopus - intelligent but very antisocial with a short life span, meaning they most likely will not work with other octopuses to improve while also living in the ocean making it harder to build. (but could probably evolve to walk on land)
dolphin - smart but does not have thumbs to make tools and lives in the ocean meaning they have a disadvantage.
raven - intelligent, works with other ravens and sometimes even wolves, and has shown to make tools.
Answer:
The raven because it's ability to craft tools, social life involving hunting groups, intelligence, and wide variety of sounds (allowing potential language) give it the potential to evolve very well.
Explanation:
The proper protective equipment for working with hazardous chemicals in the lab includes, gloves, lab coat, goggles, and a fume hood.
Answer:
True
Explanation:
Assuming this is a true or false question, your best answer should be true. There is other equipment that may be needed, for example, a safety shower (used when someone comes into contact with hazardous chemicals), but everything listed on the question is correct.
Difference between voluntary and involuntary movements give one example of each.
Answer: Voluntary movements are movements that are under our concious control; involuntary movements are movements that are not.
Example of Voluntary: Playing piano
Example of Involuntary: Heart beating
Why do you think agritourism is so important? Give two reasons.
Answer:
1: it provides us with crops 2: gives more job opportunities
If a shortage of coal were to cause an increase in coal prices, how would it most likely affect renewable energy sources like solar energy? (A) The demand for renewable energy resources would increase. (B) The cost of land for renewable energy resources would decrease. (C) The need for renewable energy would remain constant as new coal locations are discovered. (D) The facilities for renewable energy would be built and used at night until all of the coal was depleted.
Answer:
A
Explanation:
Renewables generate more energy than is used in their production, and produce fewer emissions than other power sources over their lifetime
How lysosomes would be involved in changing a caterpillar into a butterfly.
Answer:
well the caterpillar first digest it's self turning the soup into eyes, wings, antenna and other adult structures i'm sorry if i get it wrong for you
Explanation:
What types of species interactions exists in an ecosystem?
PLEASE HELP!!!!!
Match each term with its definition.
• carbohydrate
• carbon
• water
• oxygen
An illness caused by a certain virus includes fever, rash, joint pain, red eyes, and headache. The virus is transmitted to people by infected mosquitoes. Symptoms quickly occur within three to twelve days after contracting the virus. There is no vaccine for this virus. Which description best explains the reproductive cycle of this virus?
The reproductive cycle of the virus is lytic, because of the quick onset of symptoms after infection.
The reproductive cycle of virusesThe reproductive cycle of a virus is the process that is used by a virus to replicate in order to be able to cause harm to a host after invasion.
There are two types of reproductive cycles and they include:
Lytic cycle andLysogenic cycle.A virus that uses lytic reproductive cycle, has the ability to use the host cells to quickly manufacture more viruses which burst out of the cells leading to rapid onset of signs and symptoms of disease.
Therefore, the reproductive cycle of the virus is lytic, because of the quick onset of symptoms after infection.
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True or false: Muscles of the soft palate, pharynx and larynx play an important role in mastication.
name the stimulus, control control center, and the receptor when ABA is released. Please I need answers thanks!
Answer
ABA
Explanation:
It is believed that this mechanism, in situations of hydric stress, is controlled mainly by abscisic acid, a plant hormone known as ABA. This hormone binds to receptors in the membrane of the guard cells and promotes the entry of calcium ions (CA2+), which function as messengers when opening ionic channels. When these channels are opened, the chlorine(Cl-) and malate2- ions pass from the inside of the cell to the wall and open the K+ channels, causing the exit of this ion as well. This process causes the water to come out and the stomach closure occurs. When the ABA is released from the receiver, the ions that came out of the cytoplasm, together with the water, return to the inside of the cell, making it turgid. At this moment, the stomach opens.
Therefore, it is perceived that the ABA causes the stomatum to close, thus guaranteeing water savings. In environments with water stress, this mechanism guarantees the survival of the plant.
In addition to water stress, several factors directly affect the opening and closing of the ostyolus, such as the concentration of carbon dioxide, light, temperature and water loss. It is also worth mentioning that the stomata also open and close at circadian rhythms, that is, according to daily rhythms.
How does nature determine which species will survive in specific environments or when the environments change
Answer:
Organisms that are more adapted to their environment are more likely to survive and pass on the genes that aided their success.
Explanation:
hope this helps
Do you predict that salt will be able to move across the membrane?
1. Yes, because NaCl is small
2. Yes, because NaCl is ionic
3. No, because NaCl is large
4. No, because NaCl is ionic
Answer: The correct answer is
No, because NaCl is Ionic
Explanation:
NaCl can pass through the cell membrane because it is Ionic and separates into Ionic components Na+ Cl+.
Cell membrane are phospholipids bilayers and have hydrophobic tails and face inside of the cells . The fatty acids tails are non polar and only non polar substances can pass through it but salts is a polar molecules because it is an ion and cannot pass.
Does a kangaroo have a dorsal nerve cord notochord?.
Kangaroos have a dorsal nerve cord notochord. It is a feature of mammals.
What is Dorsal nerve cord notochord?The dorsal hollow nerve cord is a hollow cord dorsal which is present to the notochord. Notochord is generally formed from a part of the ectoderm which rolls, forming the hollow tube. It is important for distinguishing the chordates from other animal phyla, such as the Annelids and Arthropods, which have solid, ventral tubes.
The notochord is a flexible rod-like structure which is made up of mesodermal cells which serve as the primary longitudinal structural element of the chordates. Notochord is found in the early embryos of vertebrates and serves as an organizing role in the development of the nervous system.
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what molecules link together to form proteins
Answer:
Peptide bonds
Within a protein, multiple amino acids are linked together by peptide bonds, thereby forming a long chain. Peptide bonds are formed by a biochemical reaction that extracts a water molecule as it joins the amino group of one amino acid to the carboxyl group of a neighboring amino acid.
Induced pluripotent stem cells are ?
Answer:
are a type of pluripotent stem cell that can be generated directly from a somatic cell.
Explanation:
In an experiment that tests how
different fertilizers effect the growth of
plants, what would the INDEPENDENT
variable be?
A. the growth of the plants
B. the fertilizers
C. multiple groups with the same plant and fertilizer
D. a plant without fertilizers
Answer:
D.
Explanation:
The independent variable is the variable that goes unchanged by the others