Answer:
40
Explanation:
The population size refers to the total number of individuals in a population. It can be obtained by counting the total number of individuals in a population. In a typical plant field where it is almost impossible to count the number of individuals, the population size can be mathematically estimated using the quadrat method:
Population size = (A/a) x n,
where A = area of the field, a = area of quadrat, and n = number of plants per quadrat.
In the illustration, the area of the abandoned field was not given. Hence, it is assumed that the area of the field is equivalent to the number of quadrat thrown. Since the size of the quadrat is 1 square meter:
Area of the field = 80 x 1 = 80 square meters.
Number of plant per quadrat = 40/80 = 0.5
Population size = 80/1 x 0.5 = 40
Therefore, the population size is 40 spear grasses.
Answer:
40
Explanation:
Please help me with the attachment below
Answer:
2. The lime water turns milky in colour
3. To act as filters
4. To enable easy penetration of the root of planted crops.
See detailed explanation below
Explanation:
2. Our exhaled air principally contains carbon dioxide gas (CO2), which reacts with like water to produce a milky solution. The lime water is a solution of Calcium hydroxide (CaOH2), which chemically reacts with the C02 content of our exhaled air to form a compound called Calcium carbonate (CaCO3). Calcium carbonate is a whitish compound that appears chalky/milky.
3. Our nostrils contain a cavity called nasal cavity, which is lined with mucus (a viscous substance). The mucus helps to keep the nasal cavity wet. The hair in the nostrils also help prevent large particles in inhaled air from entering into the nasal cavity. The hair and mucus works together to filter out shirts and germs like bacteria etc from entering into the lungs.
4. Farmers loosen the soil which they plant their crops by mixing the layers of the soil. Loosening the soil encourages or promotes a deep and easier penetration of the plant roots. It also helps the soil to be properly drained and aerated i.e. penetration of water and air into the soil respectively.
The Hawaiian Islands are located in the middle of the Pacific plate, but they contain volcanoes. What
accounts for the volcanoes on these islands even though they aren't found along a plate boundary?
Explanation:
This hot spot partly melts the region just below the overriding Pacific Plate, producing small, isolated blobs of magma. Less dense than the surrounding solid rock, the magma rises buoyantly through structurally weak zones and ultimately erupts as lava onto the ocean floor to form volcanoes.
hope it helps you..
Which of the following must be true for natural selection to occur ?
"You are in your room listening to music and, realize you are thirsty, you can feel that your soda is no longer cold, and you decide to invite a friend over. What parts of the central nervous system would be primarily involved in each of these italicized behaviors?"
Answer:
A central nervous system is consist of brain and spinal cord. The brain is made of the cerebrum, cerebellum, and brain stem.
The parts of the central nervous system involved in given behaviors are as follows:
Listening to music: The cerebrum in the brain is responsible for the behaviour of listening music as it functions for auditory stimuli (temporal lobe).Realization of being thirsty: limbic system in brain is responsible for the regulation of thirst.Feel that soda is no longer cold: Hypothalamus in brain controls the sense of temperature felt by the body.Decide to invite a friend over: The cerebrum functions for thinking and decision making.The function of the choroid layer of the eye is to ________. The function of the choroid layer of the eye is to ________. regulate the amount of light entering the eye prevent light from scattering inside the eye produce gross eye movements release tears onto the anterior surface of the eye refract light and focus it on the retina
Answer:
The answer is "prevent the light from scattering inside the eye".
Explanation:
Choroid layer is located behind the retina in the eye and it's function is to adjust the amount of light absorbed and prevent it from scattering inside the eye to achieve a clear and focused image.
I hope this answer helps.
The ____________ ramus is the smaller of the two main branches. It innervates the ____________ and the skin of the back. The ____________ ramus is the larger of the two main branches. This splits into multiple other branches, which innervate the ____________ , the upper limbs, and the lower limbs. Many of the anterior rami go on to form ____________ .
Answer:
The posterior ramus is the smaller of the two main branches and innervates the deep muscles of the back and the skin of the back. The anterior ramus is the larger of the two main branches and innervates the anterior and lateral portions of the trunk and the upper and lower limbs.
Explanation:
The posterior ramus is the smaller of the two main branches and innervates the deep muscles of the back and the skin of the back. The anterior ramus is the larger of the two main branches and innervates the anterior and lateral portions of the trunk and the upper and lower limbs.
What is the brachial plexus?It is responsible for providing the motor (muscle), sensory and sympathetic innervation of the upper limb. Through it, the spinal cord is connected with all the peripheral nerves of the upper limbs and all the sensorimotor information of these segments is also transmitted.
We can conclude that the brachial plexus is a nerve network located at the base of the neck and the axillary fossa associated with sensory and motor innervation for the entire upper limb.
Therefore, The posterior ramus is the smaller of the two main branches and innervates the deep muscles of the back and the skin of the back. The anterior ramus is the larger of the two main branches and innervates the anterior and lateral portions of the trunk and the upper and lower limbs.
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I heard that mitochondria increase if we exercising. So, if i was exercising and suddenly stop exercising. Will the number of mitochondria same, and more food neededbfor energy and more energy not use and more fats produce?
Will i produce more fats when i stop exercising than when i never do exercise?
Please answer with the explanation
Answer:
I believe the amount of mitochondria in our body only increases after long term exercising.
When you are exercising, you do not produce more mitochondria straight away. Even after you stop, the amount of mitochondria will be the same.
I believe the production of mitochondria and the improvement of your muscles is the same. You need to exercise for awhile before you can get more mitochondria in your body.
As for your amount of food needed, it is not according to the amount of mitochondria you have. It is according to how much energy you need.
You should be able to tell how much food you need. So, you actually wont produce more fats. As long as you eat the correct and moderate amount of food.
You will not produce more fat when you stop exercising than when you never exercise. Like I said, the amount of fat produced is according to your food intake. Your food intake is according to your energy needs. As long as you eat moderately, you will not produce more fat. In fact, you will be able to burn fats better after long term exercise because your body will be healthier and able to moderate itself.
A human germ cell experiences a meiotic disjunction of chromosome 21 in meiosis I. Which of the following statements best describes the pattern you would expect to observe in the resulting gametocytes?
A. Two cells will have 24 chromosomes, and two cells will have 22 chromosomes.
B. One cell will have 24 chromosomes, one cell will have 22 chromosomes, and two cells will have 23 chromosomes.
C. All cells will have 23 chromosomes.
D. Two cells will have 23 chromosomes, and two cells will have 22 chromosomes.
E. Two cells will have 24 chromosomes, and two cells will have 23 chromosomes.
Answer:
Two cells will have 24 chromosomes, and two cells will have 22 chromosomes.
Explanation:
In order for translation to occur: Please choose the correct answer from the following choices, and then select the submit answer button. transcription must be occurring simultaneously. there must be large numbers of free amino acids present in the cytoplasm. the DNA must produce large numbers of free amino acids. replication must be occurring simultaneously. the nuclear membrane must first dissolve
Answer:
there must be large numbers of free amino acids present in the cytoplasm
Explanation:
In order for translation to occur, there must be a large number of free amino acids in the cytoplasm.
These free amino acids are usually carried by the transfer RNA which also carries the corresponding mRNA codon.
During translation, as the codons in the mRNA match their complements in the tRNA, the amino acid being carried by the tRNA is released and a peptide bond is formed between subsequent amino acids until the required polypeptide bond is formed.
Translation and transcription only occur simultaneously in prokaryotic cells where there is no barrier between the cell's genetic materials and the cytoplasm, unlike in eukaryotic cells where the genetic materials are housed in the membrane-bound nucleus.
Thylakoids contain clusters of chlorophyll and proteins known as . They absorb sunlight and generate high-energy that pass along the .
Answer:
1) Photosystems
2) Thylakoid membrane
Explanation:
Photosynthesis is an important phenomenon for the cells of autotrophic organisms like green plants. It is the process through which they obtain their energy source. Photosynthesis, which consists of two stages, occurs in the Chloroplast of the cell.
The light dependent stage occurs in the thylakoid lumen of the CHLOROPLAST while the light independent stage occurs in the stroma. The thylakoid is a membrane-bound sac usually organized in stacks called GRANA.
The Chlorophyll pigment, which captures the photon of light needed for the photosynthetic process, is contained in the thylakoid. Also, embedded in the thylakoid space are protein complexes called PHOTOSYSTEMS, which are involved in the capturing photons of light and transferring of electrons. The Photosystems 1&2 are the functional units of photosynthesis.
The high energy generated by the Photosystems are transferred from one electron carrier to another along the thylakoid membrane in order to generate ATP and NADPH. This process is called Electron transport chain.
Thylakoids are the membrane-bound structures present within chloroplasts of the plant cell. Thylakoids consist of photosystems and are surrounded by the thylakoid membrane.
The correct blanks for the given statement are:
Thylakoids contain clusters of chlorophyll and proteins known as photosystems. They absorb sunlight and generate high energy that passes along the thylakoid membrane.
Photosystems in the thylakoids are the structural and functional protein complexes, which play a crucial role in performing photosynthesis. These systems are present along the thylakoid membranes, and carry out the primary photochemistry of photosynthesis.
The thylakoid membrane is involved in the light-dependent reactions of photosynthesis. The membrane absorbs light energy and is then converted into chemical energy. The high-energy generated is passed along the thylakoid membrane.
Therefore, the correct answers are photosystems and thylakoid membrane.
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What are digestive enzymes? Give three examples of digestive enzymes and briefly describe their specific functions.
Answer:
Digestive enzymes are the natural substances our body needs to help break down and digest food
We have three main digestive enzymes :
Proteases: These enzymes break down protein into small peptides and amino acids.
Lipases: break down fat into three fatty acids plus a glycerol molecule.
Amylases: Are responsible for breaking down carbs like starch into simple sugars.
Explanation:
Digestive enzymes are proteins that catalyze mainly hydrolysis reactions that make nutrients absorbable in the digestive tract. Pepsin is a gastric enzyme that turns proteins into albumoses and peptones which are shorter peptide chains that are then hydrolyzed to even shorter chains until amino acids by intestinal enzymes. Pancreatic amylase is an enzyme that turns starch(a polysaccharide) into maltose(a disaccharide). Lipase is present in the gastric juice, the pancreatic juice, and the intestinal juice. This enzyme catalyzes the hydrolysis of lipids(mainly triglycerides) into fatty acids and glycerol. When incomplete hydrolysis occurs triglycerides can become monoglycerides.
What is one way people have negatively affected land resources?
habitat restoration
urbanization
terrace farming
reforestation
Answer:
URBANIZATION
Explanation:
Urbanization is one way people have negatively affected land resources
which has lead to total exploit and in availability of those resources for us.
What are resources?Resources are physical raw materials that originated from the earth which are useful for production and many things by humans and theses resources can be land, air,water and so on.
Resources are classified as either renewable and non renewable.
Renewable are resources that replenished itselves like water, wind.
Non renewable are resources that don't replenish itselves , example include fossil fuels.
Therefore, Urbanization is one way people have negatively affected land resources.
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which of the following adaptions allowed plants to transport water and nutrients from the soil to all of the cells within the plant?
A. Vascular system
B. Leaves
C.Cuticle
D. circulatory system
Answer:
c
Explanation:
I took the test
Answer:
D. circulatory system
Explanation:
Circulatory system is the method of transport of plants and animals. It gives the plants nutrients and carbon dioxide in every cell and release waste products from their system.
What are the repeating subunits that make up a nucleic acid?
Choose ONE answer:
A. Nucleotides
B. Monosaccharides
C. Amino acids
D. Glycerol and fatty acid tails
A. Nucleotides
Monosaccharides make up a carbohydrate.
Amino acids make up protein.
Glycerol and fatty acid tails make up lipids.
Study the equation for photosynthesis.
A scientist notices an increase in the glucose
production in the plants he is studying. What are the
possible reasons? Check all that apply.
6CO2 + 6H2O
Light energy
→ Cg H12O6+ 602
Chlorophyll
The plant was exposed to more intense light
The plant was exposed to less intense light
The plant absorbed more carbon dioxide.
The plant absorbed less carbon dioxide.
The plant absorbed more oxygen.
The plant absorbed less oxygen.
The plant was exposed to more intense light
The plant absorbed more carbon dioxide.
The production of glucose increase in plant cells when the intensity of light is increased and the amount of carbon dioxide absorbed is increased. These affect the rate of reaction.
What is Photosynthesis?Photosynthesis is the process of formation of glucose (sugar) in the green cells of plant. Photosynthesis takes place during the daytime as it requires sunlight to proceed the reaction. The reaction takes place in the chloroplast of plant cells.
Factors which affect the rate of photosynthesis are light intensity and carbon dioxide concentration. Light intensity is directly proportional to the rate of photosynthesis, as the intensity of light increases the rate of photosynthesis also increases.
Similarly, carbon dioxide is also proportional to the rate of photosynthesis as carbon dioxide is a reactant in this process. With the increase in the amount of reactants, the rate of a chemical reaction increases and hence more product is formed.
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can someone help plz!?
Answer:
Biotic factors and abiotic factors, plant and light energy, herbivores, heterotrophs, omnivores, carnivores, primary consumer, decomposers and tertiary consumers.
Explanation:
Both biotic and abiotic factors are interacting with each other in an ecosystem. Plants use light energy from the sun to produce their own food. Herbivores are the organisms that feed on producers (plants). Heterotrophs are those organisms which are unable to make their own food. Omnivores are the organisms that eat both plants and animals. Carnivores feed on animals only. Primary consumers are the consumer which feed on plants. Decomposers helps in the breakdown of dead bodies of plants and animals. Tertiary consumers feed on secondary consumer.
Which best describes how a vaccine works?
A. The vaccine causes a nonspecific immune response.
O B. The vaccine cells kill bacteria.
C. The vaccine makes the body create memory cells.
O D. The vaccine produces white blood cells.
Answer:
C I believe
Explanation: It basically gives you the virus so that your whatever cells can remember next time that its the same thing if you get it and try to fight it off. If you can help me with ap ex unit 2 pretest that'd be great im Jumper-#7209 on discord if you can
Which is a structure that directs the cell's activities? nucleus Golgi apparatus ribosome mitochondrion
Answer:
the answer is nucleus
Explanation:
Organelles are the cellular structure that performs various functions. The organelle nucleus directs all the activities of the cell. Thus, option a is correct.
What is a nucleus?The nucleus is an organelle present inside the cell and has the most vital role in the functioning and hereditary. It controls majorly all activities in the cell including growth, inheritance, metabolism, etc.
It is enclosed in a nuclear membrane that separates it from the cytoplasm and is the region where the process of replication and transcription takes place. It is the control center that directs and regulates the cellular activity that is essential for the cell to survive.
Therefore, a nucleus is an organelle that regulates cellular activities.
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Differentiate between parenchyma collenchyma and sclerenchyma in tabular form
Explanation:
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Which process is part of translation but not transcription?
A DNA template is used to create an mRNA strand.
A tRNA template is used to create a DNA strand.
A tRNA template is used to create an mRNA strand.
An mRNA template is used to create an amino acid chain.
Answer:
An mRNA template is used to create an amino acid chain.
Explanation:
Transcription is the process where new mRNA is created from DNA. Translation, however, is the process of creating proteins by using mRNA as a template. Proteins are made up of amino acids often in the form of an amino acid chain.
The process that is part of translation but not transcription is "mRNA template is used to create an amino acid chain"
PROTEIN SYNTHESIS:
Protein synthesis is the process that synthesizes amino acid sequence (protein) from genes. The process involves two steps namely: transcription and translation. Transcription is the process whereby a DNA molecule is used to synthesize a mRNA molecule in the nucleus of the cell. Translation is the process whereby the mRNA transcript is used to synthesize an amino acid sequence in the ribosome. Therefore, the process that is part of translation but not transcription is "mRNA template is used to create an amino acid chain"Learn more at: https://brainly.com/question/11390351?referrer=searchResults
What is Coronavirus
Answer:
Coronavirus is a respiratory illness that can be spread from person to person. It's a new disease that has not been previously seen in humans.
Answer:
It is a type of virus that spreads from one another.
Explanation:
Place the steps of biofilm formation in the correct order: 1. Quorum sensing and the establishment of the extracellular matrix commences as microbes attach more stably. 2. Surface (substratum) is preconditioned by environmental molecules. 3. Biofilm matures and some microorganisms escape to the planktonic state. 4. Microbes attach and detach from the preconditioned surface.
Answer:Step order:
2. The surface (substrate) is preconditioned by environmental molecules.
4.Microbes bind and detach from the preconditioned surface.
1.Quorum detection and extracellular matrix establishment begins as microbes bind more stably.
3. The mature biofilm and some microorganisms escape the planktonic state.
Explanation:
The biofilm is a highly complex structure where many microorganisms coexist, compete, reproduce, feed, within a micro-system with many ideal conditions for each microorganism that is housed in it.
The biofilm is resistant to non-selective antimicrobials, that is, to disinfectants such as sodium hypochlorite, chlorhexidine, among others.
Evidence was also presented that they are resistant to selective antimicrobials such as antibiotics, that is why they have great virulence factors or potential to trigger pathology.
The solution to destroy a biofilm is mechanical sweeping, with brushing as it happens on our teeth or even with the catheter cleaning brushes that are used (in addition to the sterilization methods).
This biofilm presents separate colonies in its interim with a fluid that it travels transmitting signals, food, toxins, resistant factors between these different types of microorganisms. This fluid and this communication between them is called quorum sensing and not all microorganisms tolerate it.
Many microorganisms compete with each other for the medium, an example is streptococcus mutating in the dental biofilm, which generates an acidic medium by metabolizing carbohydrates within the biofilm, thus generating that those bacteria that live in neutral or alkaline ph cannot reproduce and die.
The biofilm can be contained by bacteria, viruses, fungi and even parasites, but what they all have in common is that they have the ability to reproduce on an inert surface such as catheters, dental surfaces, silicone hoses.
8. What type of chemical bond forms between positive and negative ions?
metallic
jonic
covalent
Answer:
and: option B) Ionic bond
1. producer eats meat and plants
2. primary consumer breaks down dead organisms
3. carnivore makes own food
4. omnivore gets energy directly from producer
5. decomposer eats only meat
Answer:
Producer makes own food
Primary consumers gets energy directly from producer
Carnivores eats only meat
Omnivores eat meat and plants
Decomposer breaks down dead organism
Hope Its useful
What is the wavelength of a wave that has a velocity of 260 meters per second and a frequency of 95 hertz?
Express your answer to the nearest whole number.
Answer: its
3
Explanation:
The fossil record is a testament to extinct fauna no longer present on Earth. Certain areas of the planet have always had high species diversity (evident from fossils and catalogs of current species diversity). Which of the processes listed likely contributed to the patterns of animal diversity we see
Answer:
The processes that likely contributed to the patterns of animal diversity we see is LOCAL AND GLOBAL EXTINCTION EVENTS.
Extinction event is when a large number of multicellular organisms of same species die within a short period of time reducing the number of such organisms in circulation in the ecosystems.
Extinction event can be (all over the world) or local (within a speculated geographic location).
Causes of extinction includes; population growth,habitat loss,over consumption, population and introduction of new species.
When you eat, your blood glucose level rises. Soon after, it drops as the glucose is stored. Where does it go?
Explanation:
About to six hours after you eat the glucose levels in your blood decrease triggering your pancreas to produce glucagon. This hormone signals. your liver and muscle cells to change the stored glycogen back into glucose.
Planets near the Sun are composed of mainly rock and iron. How does the Solar Nebula theory account for this? Select one: a. The planets that today are near the Sun were captured. b. The forming Sun’s heat prevented substances such as ices from condensing in the inner Solar System. c. The Sun’s magnetic field attracted all of the iron in the nebula into the inner Solar System. d. As the planets were captured, denser ones were pulled closer to the Sun by gravity. e. The planets that today are far from the Sun were captured. Clear my choice
Answer:
B
Explanation:
Question 8 of 10
What is the name of a group of connected and related organisms?
O A. Matter
ОО
O B. Flow
O C. System
D. Energy
Describe the importance of photosynthesis in producers