Answer:
The flow of energy in a forest community
Which of the following adds oxygen to the atmosphere?
A.forest fires
B.the weathering of rocks
C.photosynthesis
D.life processes of animals
Helppppp I will make brainliest
The process of photosynthesis adds oxygen to the atmosphere. Option C is correct for the given statement. In the atmosphere, nearly 21% oxygen is present.
What is the gas constituent of the atmosphere?In the atmosphere, different gases such as oxygen, nitrogen, carbon dioxide, and water vapour are present. These differ in composition, with oxygen accounting for 21%, nitrogen accounting for nearly 78%, and carbon dioxide accounting for less than 1%.
The oxygen is produced by the process of photosynthesis that is undertaken by green plants. The phytoplankton, algae in aquatic habitats, and plants of the terrestrial ecosystem do photosynthesis because of the presence of chloroplasts.
This oxygen is used by animals and plants for cellular respiration. Others are incorrect options because forest fires increase carbon dioxide in the atmosphere, animals take oxygen from the atmosphere, and rock weathering does not add oxygen.
As a result, option C is the correct answer because photosynthesis produces oxygen for the atmosphere.
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Which statement about ecosystems is true
The correct answer is D. Ecosystems are always smaller than a biome.
Explanation
A biome is a set of abiotic factors that form a territory in which different organisms inhabit. In addition, biomes encompass a set of ecosystems such as tundra, rainforest, savannas, wetlands, among others. On the other hand, an ecosystem is a community of organisms that interact with other organisms and abiotic factors. According to the above, the correct answer is D. Ecosystems are always smaller than a biome becaause biomes includes ecosystems with similar features.
A protein has a molecular mass of 400 kDa when measured by gel filtration. When subjected to gel electrophoresis in the presence of sodium dodecyl sulfate (SDS), the protein gives three bands with molecular masses of 180, 160, and 60 kDa. When electrophoresis is carried out in the presence of SDS and b-mercaptoethanol, three bands are again formed, this time with molecular masses of 160, 90, and 60 kDa. Determine the subunit composition of the protein (how many and what sizes) and why you observe the different banding pattern under the two conditions.
Answer:
subunit composition
how many: 4 subunitswhat sizes: 160 kDa, 60 kDa, 90 kDa, and 90 kDa.Explanation:
SDS is a detergent that denaturalizes the protein and sets a relation charge size, such as that the motion of the protein in the gel is proportional to its weight. However, the detergent can not disrupt disulfide bridges, so these bonds remain together. The bigger the protein is, the stronger interaction with the polyacrylamide gel there will be. The speed of displacement in the electromagnetic field is inversely proportional to the protein size.
On the other hand, b-mercaptoethanol acts as a reductive agent, breaking disulfide bonds. This chemical produces a complete denaturalization resulting in the unfolded protein. If disulfide bridges kept two protein subunits together, the b-mercaptoethanol separates them.
So, the most important data we need to consider here is that SDS can not disrupt disulfide bridges, while b-mercaptoethanol can.
Available data:
A protein has a molecular mass of 400 kDaSDS → three bands with molecular masses of 180, 160, and 60 kDaSDS + b-mercaptoethanol → three bands with molecular masses of 160, 90, and 60 kDaSDS
180 + 160 + 60 = 400 kDa
SDS + b-mercaptoethanol
160 + 90 + 60 = 310 kDa
The difference between them is 400 - 310 = 90 kDa, meaning that there is a subunit of 90 kDa that is not being detected by SDS alone.
From both measures ( SDS and SDS/b-mercaptoethanol) we can assume that subunits 160 kDa and 90kDa are the same. So the difference is in the left subunit ⇒ 180 and 90, respectively.
180 - 90 = 90 kDa
We can assume that the 180 kDa subunit is composed of two 90 kDa subunits joined by a disulfide bridge. SDS alone could not disrupt this bond, so it detected a unit of 180kDa. b-mercaptoethanol detected this bond and broke it, generating two 90 kDa units, which migrated together in the gel, so they were expressed as the same band.
This difference suggests that the protein is formed of 4 subunits. One of them is 160 kDa, another one is 90 kDa, and the last two subunits are 90 kDa each.
Which of the following describes copepods?
tiny, single-cell creatures that scientists believe were instrumental in the development of evolution
small sea crustaceans from the order of macroplankton of about 20-200 millimeters that are visible with the naked eye
microscopic organisms that drift in both marine and freshwater environments and perform photosynthesis
a genus of large brown seaweed that floats in island-like masses, called beds, and is common in waters off the U.S. South Atlantic coast
Answer:
single-cell creatures that scientists believe were instrumental in the development of evolution
small sea crustaceans from the order of macroplankton of about 20-200 millimeters that are visible with the naked eye
letter of invitation to parents
Answer:we need a question here?
Explanation:
Each of the tissues listed below has a specialized function that is linked closely to the structures found within the tissue's cells. Match each tissue on the left with the cell structures and/or organelles on the right that would be abundant in the tissue's cells. Use your lab manual or other outside resources for a description of any structures or organelles that are unfamiliar to you.
Insect flight muscles [Choose ] <
Cells lining the respiratory passages [Choose ] <
White blood cells that engulf and destroy invading bacteria [Choose ]
Leaf cells of cacti [Choose] <
Goblet cells lining the intestinal tract that secrete mucus [Choose ] < [Choose ]
Pancreatic cells that are responsible for creating several digestive enzymes (proteins)
Option of definitions:MitochondriaChloroplastsRibosomesCilia and FlagellaGolgi apparatusLysosomes
Answer:
Insect flight muscles [Mitochondria]
Cells lining the respiratory passages [Cilia]
White blood cells that engulf and destroy invading bacteria [Lysosomes]
Leaf cells of cacti [Chloroplasts]
Goblet cells lining the intestinal tract that secrete mucus [Golgi apparatus]
Pancreatic cells that are responsible for creating several digestive enzymes (proteins) [Ribosomes]
Explanation:
Mitochondria are cell organelles whose main function is energy generation during respiration. They generate energy in the form of ATP which is then used by the cells and tissues for various metabolic function. Mitochondria are abundant in cells whose energy requirements are high such as muscle cells. Therefore, insects flight muscles will have an abundance of mitochondria.
Cilia are finger-like projections on respiratory surfaces whose sweep-like movements help to move particles and fluids out of the airways. In the trachea, the cilia trap particles like bacteria and viruses and then move these trapped particles along with mucus up to the pharynx where it is either coughed out or swallowed into gastrointestinal tract. Therefore, respiratory surfaces like the trachea will have an abundance of cilia.
Lysosome are cell organelles which function to destroy and digest foreign and cellular proteins in the cell. They have an abundance of proteolytic enzymes which degrade proteins at acidic pH. Therefore, white blood cells that engulf and destroy invading bacteria will have an abundance of ysosomes.
Chloroplasts are plant cells organelles which are the sites for photosynthesis. It is abundant in the leaves of plants where photosynthesis mainly take place. Therefore, leaf cells of cacti will have an abundance of chloroplasts.
Golgi apparatus is a cell organelle that helps process and package proteins and lipid molecules, especially those that are to be secreted outside the cell, packaging them into vessicles. They also make and secrete mucus. Therefore, goblet cells lining the intestinal tract that secrete mucus will have an abundance of Golgi apparatus.
Ribosomes are cell organelles whose main function is to synthesize proteins, both for intracellular and extracellular purposes. Proteins such as hormones, enzymes etc, are synthesized by the ribosomes. Therefore, pancreatic cells that are responsible for creating several digestive enzymes (proteins) will have an abundance of ribosomes.
There are different kinds of tissues in the body.
Insect flight muscles is found in the Mitochondria.Cells lining the respiratory passages is found in the cilia and flagella .White blood cells that engulf and destroy invading bacteria linked to the Lysosomes.Leaf cells of cacti are linked to the ChloroplastsGoblet cells lining the intestinal tract that secrete mucus linked to Golgi apparatus.Pancreatic cells that are responsible for creating several digestive enzymes linked to proteins and Ribosomes.What are the types of tissues?There are known to be 4 main types of tissue. They are: The connective tissue, epithelial tissue, muscle tissue, and nervous tissue. The Connective tissue is known as a tissue that helps to supports other tissues.
The Epithelial tissue gives a form of covering such as skin to the body.
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Translation is the process during which A.mRNA is created in the nucleus B. Glucose molecules are made C. mRNA is decided to form a protein D. Lipids are synthesized ?
Answer:
C
Explanation:
translation is the formation of amino acids
Which two kinds of information describe weather and not climate?
A. How the air pressure is expected to change tonight
B. The usual frequency of blizzards in an area
C. The average high temperature for this date over 30 years
0
D. The temperatures for the previous week
Answer:
b. the usual frequency of blizzards in an area
Recall the chemical reaction of photosynthesis: 6CO2 + 6H20 - C6H12O6 + 602. Why are forests
referred to as "carbon sinks"?
Answer:
Because they absorb and store more carbon in form of CO2 during photosynthesis than they release
Explanation:
A "sink" as opposed to source is a site where something is deposited or stored rather than produced. Plants in the forest vegetation are capable of a unique process called photosynthesis, in which they manufacture their food using inorganic carbon as powered by light energy. The photosynthetic equation is given below;
6CO2 + 6H20 → C6H12O6 + 602
Based on the equation above, carbon dioxide is required for photosynthesis and is obtained from the atmosphere via the stomata on the leaves. This means that carbon in form of CO2 must be stored in the plant prior to photosynthesis, hence, FOREST is referred to as CARBON SINKS because it absorbs and stores more carbon (CO2) during photosynthesis than it gives out.
Why are forests important for helping to control the rate of climate change?
Answer: Forests are a stabilizing force for the climate. They regulate ecosystems, protect biodiversity, play an integral part in the carbon cycle, support livelihoods, and supply goods and services that can drive sustainable growth.
Explanation:
The forest helps to maintain ecological balance, carbon cycle and rainfall.
How forest maintains ecological balance?"Ecological balance is a state of dynamic equilibrium within a community of organisms in which genetic, species and ecosystem diversity remain relatively stable, subject to gradual changes through natural succession."The forest prevent soil erosion and maintain soil fertility. It establish oxygen and carbon balance in nature.It absorbs harmful gases like carbon from environment. What is carbon cycle?"The carbon cycle is biogeochemical cycle by which carbon is exchanged among the biosphere, hydrosphere and atmosphere of the earth."Forests takes up carbon from atmosphere and gives out oxygen.Forest helps in decay, disturbance and renewal of carbon.Hence, the forest regulate rainfall, ecological balance and carbon cycle.
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Does crossing over occur in sex
chromosomes?
Answer:
Recombination occurs routinely everywhere except on the sex chromosomes, where the genetic deck of cards remains stacked, unable to shuffle information -- with the exception of two small regions located at the tips of the X and Y chromosome, called pseudoautosomal regions (PAR1 and PAR2).
Explanation:
THIS IS NOT MY WORDS! I HOPE THIS HELPS!
2. what are the differences between Mitosis and meiosis
Answer:
The differences between Mitosis and meiosis is Mitosis involves the division of body cells, while meiosis involves the division of sex cells. The division of a cell occurs once in mitosis but twice in meiosis. Two daughter cells are produced after mitosis and cytoplasmic division, while four daughter cells are produced after meiosis
I need some help with summarizing the following topics: cells and cell processes; photosynthesis and respiration; genetics; evolution; ecology; human body.
Answer: Read below!
Explanation:
Cells: the smallest structural and functional unit of an organism.
Cell Processes: any process that is carried out at the cellular level, but not necessarily restricted to a single cell.
Photosynthesis: the process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water.
Respiration: a process in living organisms involving the production of energy.
Genetics: he study of heredity and the variation of inherited characteristics.
Evolution: the process by which different kinds of living organisms are thought to have developed and diversified from earlier forms during the history of the earth.
Ecology: the branch of biology that deals with the relations of organisms to one another and to their physical surroundings.
Human Body: the physical substance of the human organism, composed of living cells and extracellular materials and organized into tissues, organs, and systems.
effects of antibiotics lab
Answer:
It helps us to defeat bacteria in our body
Antibiotics either kill or slow the growth of bacteria. Side effects can include diarrhea, an upset stomach, and nausea.
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Suppose that you compare the amount of food needed by four groups of lizards, each of which has a metabolic rate that is expected for its body size. There are 10 lizards weighing 10 g each, 5 lizards weighing 20 g each, 2 lizards weighing 50 g each, and a single 100-g lizard. Assuming equal digestibility, similar food, and so on, the _______ lizards need the most food.
A. 10-g
B. 20-g
C. 50-g
D. 100-g
E. All of the above need the same amount of food.
Answer:
The _10 gr__ lizards need the most food.
Explanation:
Metabolic rate: Refers to the energy used by the organism during a period of time. Small animals have higher metabolic rates than big animals to maintain energy levels. In general, small animals are more active than big animals. The amount of food needed by the animal to keep energy and body mass depends on the individual´s metabolic rate.
If small animals have a higher metabolic rate than big animals, then they need more food to maintain their energy levels. The relationship size-metabolic rate can be applied to different species -such a mouse and an elephant-or to the same species -like the one of the exposed example-.
So, in comparison, and considering their body sizes, 10 g lizards have the highest metabolic rate, meaning that they need the most food -again, considering their sizes- to keep energy and body mass constant.
Stored energy or energy of position is known as
Energy *
1.)Potential
2.)Kinetic
Answer:
Explanation:
1) potential because it is not "in motion"
6. Discuss how polymorphism in the cnidarians might have influenced adaptive radiation of the group.
Answer:
Explanation:
The class Anthozoa of the phylum Cnidaria includes a wide range of corals and marine animals. Cnidarian polymorphism: Medusa and Polyp are two phases wherein cnidarians vary their morphology for adaption, resulting in them mostly existing as dimorphic zooids. Finally, as the medusa stage develops, these colonial polyps might differentiate into specialized forms.
Medusa forms possess velum, manubrium, defined radial canals, and accompanying ring canal, as well as other components like ocelli and statocysts, demonstrating their adaptability to their survival. Polyp stages have adaptive radiation, including such stolon and structures like hydranth and planula, to help them escape predators. Other structures commonly found include gonangia and gonopore.
Hydra is a kind of freshwater animal belonging to the class Cnidaria. Hydra is diploblastic, which implies it has two tissues: nerve and muscular tissue. Mesoglea is a gel-like material that separates the epidermis and the gastrodermis. Charles Darwin used these finches in his experiments to illustrate how changes in the environment, allelic alterations, and mutation effect affected the species' adaptive radiation.
Use Figure 12.1 and the information here to answer the following questions. The unlettered circle shows a diploid nucleus with four chromosomes. There are two pairs of homologous chromosomes, one long and the other short. One haploid set is symbolized as black and the other haploid set is gray. The chromosomes in the unlettered circle have not yet replicated. Choose the correct chromosomal conditions for the following stages.
Which cell is at prophase of mitosis?
a.) A
b.) B
c.) C
d.) D
e.) E
Answer:
B
Explanation:
B is the answer for above question.
Question 12 of 15
Acceleration can be found by computing the slope of a
graph.
VS. time
Answer herede
SUBMIT
Answer:
The correct answer is - velocity (velocity VS. time).
Explanation:
Acceleration is a vector quantity that is the rate of change in the velocity at a change in time. The formula for the acceleration is a = Δv/Δt., where a is acceleration and Δv is the change in velocity and Δt is the change in time.
In a velocity-time graph, velocity is denoted on the Y-axis whereas time is denoted on the X-axis. The Slope of a graph found is the ratio of the velocity over or VS. time.
Which process results in the formation of water on the outside of a cold glass of iced tea on a warm day? *
A) boiling
B) freezing
C) condensation
D) evaporation
The movement of molecules across a cell membrane using a membrane transport protein and cellular ATP energy, generally moving the molecules from a region of low to high concentration, is called
The movement of molecules across a cell membrane using a membrane transport protein and cellular ATP energy, generally moving the molecules from a region of low to high concentration, is called facililated transport
Answer:
Active transport: moving against a gradient
To move substances against a concentration or electrochemical gradient, a cell must use energy. ... Primary active transport directly uses a source of chemical energy (e.g., ATP) to move molecules across a membrane against their gradient.
Explanation:
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Some orchids produce two types of flowers, one with only anthers and the other with only carpels. And on some orchids like this, the flowers look very different from on another. An explanation for this difference is
Answer:
The Orchids is the diversified structures of flowers, in fact, they have unique feature. Even with the pollination, they have several mechanisms of pollination. Few of them include:
1. Few orchids have self-fertilization where the anther converts from solid-state to a liquid state without any aid of an external pollinating agent.
2. In others, self-pollination occurs, when the caudicles dry the pollen fall on the stigma.
3. This happens through an external pollinator resulting in a diversity of species.
4. This is a very special case where the flower attracts the insect to mate with bright petals, odor, and the shape.
5. These types depend on ants and other insects to get pollinated.
6. Here, the pollens release some kind of force, when an insect gets in contact with anther which results in getting away the agent from the flower.
The factors that affect the climate are *
Answer:
factors effecting the climate
Explanation:
factors effecting the climate
Looking at the image to the right, which two letters would be responsible for lowering the water table?
A) C and D
B) All of them
C) A and D
D) A and B
Answer:
d
Explanation:
evaporation is the water being lost from the water body into atmosphere fence water level lowers
In which of the following does the land being moved contain approximately 60% water? landslide slump mudflow creep
Answer:
C. Mudflow
Explanation:
The land contains approximately 60% of water in a mudflow.
:D
Answer:
Mudflow
Explanation:
I got mudflow correct on edge its not landslide
The number of possible genetically different gametes for an organism equals
2N, where Nis the number of pairs of chromosomes. If an organism has four
pairs of chromosomes, how many different gametes can it produce?
O A. 16
O B. 4
O C. 8
O D. 32
Answer: it’s 16
Explanation: i took the quiz
If an organism has four pairs of chromosomes, 16 gametes can it produce. So, the correct option is A.
What are Gametes?A gamete is defined as the reproductive cell of an animal or plant while the female gamete is called the ova or egg cell, and the male gamete is called the sperm in the animal cells. Ova and sperm are haploid cells with each cell containing only one copy of each chromosome. During fertilization a sperm unite with the ovum to form a new diploid organism.
When the organism has four pairs of chromosomes, 16 gametes can it produce. In seed plants, the pollen is called the male sperm that produces the gametophyte while the female gametes are contained within the ovary of the plant.
So, the correct option is A.
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Which of the following choices is an example of a non-specific barrier?
skin
white blood cells
lymphatic system
the immune system
An example of a non-specific barrier is the skin. Thus, the correct option is A.
What are non-specific barrier?Non-specific barriers are the innate, or nonspecific type of immunity of the defense system with which a person is born with. Non-specific barrier protects a person against all the antigens. Innate immunity involves the barriers which keep the harmful materials from entering the body. These barriers form the first line of defense in the immune response of an individual.
Nonspecific defense mechanisms include the skin, mucous membranes, secretions, excretions, enzymes, inflammatory responses, genetic factors, and the behavior patterns.
Skin is a physical and non-specific barrier which is covered with oily and acidic pH which ranges from 3 to 5, and the secretions from sebaceous and sweat glands, respectively.
Therefore, the correct option is A.
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What will happen to life on earth if the average annual temperature on earth continues to increase?
for me every stress comes on human can lessen its life span ,so i believe its the same to our planent.
When it gets cold out, you shiver and your blood vessels constrict to increase and preserve your body temperature. This is an example of your body
maintaining homeostasis by doing.
Plz help asap I have less than 3 minutes
Answer:
Preserving homeostasis Homeostasis depends on your body's ability to detect and oppose these changes. Negative feedback loops are often used to maintain homeostasis. These cycles act in opposition to the stimulus, or signal, that triggers them
Some species of algae grow on fungi. The algae makes sugars by the process of photosynthesis, which helps make food for the fungus as well.The fungus provides moisture for the algae. This is an example of:
A. commensalism
B. parasitism
C. mutualism
D. succession
