Answer: The NEGATIVE CONTROl is the test tube that is filled with ONLY distilled water.
Explanation:
A negative control of an experiment is carried out alongside the main primary experiment except that the treatment is changed to something that is predicted to have no result. In the negative control, the student does not expect any response. This would help the student compare the result of a new experiment against an already known existing results.
Analysing the experiment carried out by the student, She filled two test tubes with distilled water and placed a piece of Elodea in one of the tubes, leaving the other without a plant. The other test tube that contains only distilled water is the negative control because she wasn't expecting any result from it. It's also served as a control sample to the primary experiment. This is observed as she blew in each tube to add carbon dioxide, which caused the distilled water to become more acidic. This would help the student know that the that experimental results are valid and to ensure that time is saved.
A small number of birds arrive on an island from a neighboring larger island. About twice a year, one or two more birds from the neighboring island arrive. These new arrivals: Group of answer choices tend to speed up adaptation to new food plants speed up the process of speciation accelerate differentiation between the two populations tend to slow divergence of the two populations
Answer:
Hello. None of the answer options is correct, as the new arrivals delay adaptation to new food plants.
Explanation:
The arrival of new birds increases competition for food. This makes the birds that have just arrived have some difficulty in accessing food, as they will have to compete with the birds that are already on the island. This makes the novice birds look for food plants they already know, which delays their adaptation to feeding new plants they do not know.
Helpppppp!!!!
Which feature is an example of psychological adaptation?
Multiple Choice
Re-growing a forest will:
cause desertification in surrounding areas due to the trees' high water demands,
increase water run-off.
lead to eutrophication of nearby lakes,
reduce water run-off.
The equation shows reactants to a neutralization reaction.
Ca2+ + OH– + H+ + NO
Which describes what will happen to the H+ when these reactants form products?
H+ binds with NO to make a salt.
H+ binds with Ca2+ to make an acid.
H+ binds with OH– to make water.
H+ binds with Ca2+ to make a base.
Answer:
Ca²⁺ + OH⁻ + H⁺ + NO₃⁻
Ca(OH)₂ + 2HNO₃ → Ca(NO₃)₂ + 2H₂O
Ca²⁺ + 2OH⁻ + 2H⁺ + 2NO₃⁻ → Ca²⁺ + 2NO₃⁻ + 2H₂O
OH⁻ + H⁺ → H₂O
H⁺ binds with OH⁻ to make water
Answer:
C
Explanation:
did it on edge 2022
Which of the following pairs correctly matches the type of cell division with
the type of cell produced in this stage?
A) Egg Cell and Mitosis
B) Skin Cell and Meiosis
C) Zygote and Cytokinesis
D) Gamete and Meiosis
Answer:
c
Explanation:
its my lucky letter
moneras nutricion autotrofa,heterotrofa o ambas?
Explanation:
Reino Moneras: Seres unicelulares formados por células procariotas, llamadas así por que no tienen núcleo. Se trata de seres autótrofos o heterótrofos que viven en todos los ambientes del planeta, tanto en el agua como en el suelo o el aire, incluso dentro de otros organismos.
Which of the following best describes a population?
Answer:
C
Explanation:
Population is the number of simular species in the area, so the land and fish don't count.
if a specimen takes up one quarter of the field of view (0.500 mm), what is the size of the specimen in micrometers (um)?
Answer:
Explanatio1 n/4*0.500*10^3=125
reasons for deforestation ?
Answer:
mark as brainiest please
Explanation:
Agricultural Activities
mining
urbanisation
illegal longing
forest fires
Natural causes as hurricanes, fires, parasites and floods.
identity two excretory products produced by plants
Answer:
Carbon dioxide, excess water produced during respiration and nitrogenous compounds produced during protein metabolism are the major excretory products in plants. Plants produce two gaseous waste products i.e. oxygen during photosynthesis and carbon dioxide during respiration.
Which is most likely to help an introduced species become invasive?
Part A
In the current system of classification, living organisms are classified into the taxonomic levels of kingdom,
phylum, class, order, family, genus, and species. Why is it important for all scientists to use the same
hierarchy of classification when describing newly discovered organisms?
The principle that the geologic processes that we see today have occurred throughout earths history is called
the only phylum that shows active flight in invertebrates is
coelenterata
arthropoda
mollusca
echinodermata
Answer:
It would be arthropoda
Explanation:
Insects and arthropods are the only invertebrates able to fly since insects are not a part of your list arthropoda would be the answer. I hope this helps and if you can give me brainliest? :)
What best describes the endocrine system
A. system of transport
B. network of hormone-producing glands the control actions of the organism
C. network of tissues that respond and send messages
D. it is the network of nerves that coordinate bodily functions
Answer:
B
Explanation:
I took bio last year
The cells were kept in a dilute salt solution. They were then transferred to distilled
water.
Explain what will happen to each of these two cells when they are placed into distilled water.
When plant cells are placed in salt solution their appearance is different to when they are placed in distilled water. ... Therefore, water moves out of the cell across the partially permeable membrane by osmosis and the cell becomes flaccid as the cell membrane peels away from the cell wall
2) Cartilage is not found in
a. Nose
C. Bones
b. Adipose tissue
d. Phosphorus and potassium
d
Phosphorus and potassium do not have any cartilage
What environmental condition contributed to the heat wave experienced in Europe and the thousands of deaths in France? a. polluted water b. sewage c. air pollution d. a and b
Answer: c. Air pollution
Explanation:
There was a heatwave in Europe during the early years of the 21st century that killed tens of thousands across the continent and thousands in France.
Air pollution was blamed for having made the situation worse because the pollutants in the air acted to prevent heat from escaping back into the atmosphere which led to increased heat on ground and therefore a heat wave.
Answer:
C
Explanation:
Yeast undergo anaerobic respiration (fermentation), where glucose is broken down into two (2) ATP and two (2) pyruvate. This pyruvate is then used to form what waste product?
The pyruvate is then used to form Ethanol [tex][C_2H_5OH][/tex] and Carbon dioxide [tex][CO2_][/tex].
What is Anaerobic respiration?Anaerobic respiration is defined as respiration using an electron acceptor other than molecular oxygen where oxygen is not the final electron acceptor, the process still uses the respiratory electron transport chain.
Anaerobic respiration is described as the process in which there is incomplete oxidation of glucose in the absence of oxygen which is commonly known as fermentation.
One type of fermentation is alcohol fermentation where the pyruvate is decarboxylated [tex](CO_2 leaves)[/tex] to form acetaldehyde. Hydrogen atoms from NADH+. H+ are then used to help convert acetaldehyde to ethanol. NAD+ results.
Thus, the pyruvate is then used to form Ethanol [tex][C_2H_5OH][/tex] and Carbon dioxide [tex][CO2_][/tex].
Learn more about Anaerobic respiration, here:
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What is the work done when a force of 5 N is applied to a ball and it moves 80 m?
Answer:
400Joules
Explanation:
the total work done to be calculated is Force× Distance
:f×d=W
80×5=320J
What are the waste products of alcoholic fermentation?
A. Ethanol and carbon dioxide
B. Lactate and oxygen
C. Glucose and water
D. Carbon dioxide and oxygen
(40 points!!!) (will mark brainliest if its right)
Answer:
ethanol and carbon dioxide :)
Explanation:
The correct option is A. Ethanol and carbon dioxide are the waste products of alcoholic fermentation.
What is alcoholic fermentation?A biological process called alcoholic fermentation, often known as ethanol fermentation, turns sugar into alcohol and carbon dioxide. Alcoholic fermentation is an anaerobic process since yeasts carry out this function and oxygen is not required.
The fermentation process produces heat, carbon dioxide, water, and alcohol as byproducts. In this instance, our attention is on the latter.
A biological process called alcoholic fermentation, often known as ethanol fermentation, turns sugar into alcohol and carbon dioxide. Alcoholic fermentation is an anaerobic process since yeasts carry out this function and oxygen is not required.
Therefore, The correct option is A. Ethanol and carbon dioxide are the waste products of alcoholic fermentation.
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what is life in general.
Answer:
Gift, mission, prison
Beautiful lie
Metabolic rate is _____. See Concept 40.4 (Page) View Available Hint(s) Metabolic rate is _____. See Concept 40.4 (Page) determined when the organism is vigorously exercising after consuming a fatty meal the total amount of energy an animal uses in a unit of time typically higher in an ectothermic animal than in an endothermic one the amount of heat gained by an animal in a unit of time directly proportional to body size
Answer:
The correct answer is ''the total amount of energy an animal uses in a unit of time''
Explanation:
The general metabolism or metabolic requirements can be defined as the energy demands that an organism requires for the set of biochemical reactions and physicochemical processes that occur in its cells. This set of reactions allows living beings to grow, reproduce, keep their physical structures in order and respond to external stimuli, among other things. Basal metabolism or Metabolic Rate (BMR) refers to the rate of energy expenditure (the amount of energy [expressed in kilocalories or megajoules (MJ)]) per unit of time that is spent when endothermic animals are in physical rest full. In other words, it is the amount of heat (expressed in calories) that is generated in one hour by an endothermic animal kept at rest. Also, it can be expressed as kilocalories per hour or per kilogram of weight.
Select the correct characteristics of the action of an enzyme. Select all that apply. Multiple select question. Enzymes are typically much smaller than reactant substrates, and each reaction requires many enzymes to activate its chemical change. Enzymes are incredibly versatile, each catalyzing a huge number of biological reactions. An enzyme behaves like both a heterogeneous and a homogeneous catalyst. Enzymes are enormously efficient, much more so than synthetic catalysts.
Answer: Enzymes are incredibly versatile, each catalyzing a huge number of biological reactions.
An enzyme behaves like both a heterogeneous and a homogeneous catalyst.
Explanation:
Enzymes are the biological catalyst they speed up the rate of the reaction without being consumed in the reaction. It is versatile in terms of catalyzing huge number of biological reactions but every enzyme has a specificity for a reactant or substrate. An enzyme can work as both homogenous and heterogenous catalyst. Homogenous catalyst is the one which is similar in properties as that of the substrate and heterogenous catalyst is the one which is dissimilar in properties as that of the substrate.
The correct characteristics is that of the action of an enzyme, enzymes are enormously efficient, much more so than synthetic catalysts.
Uses of enzymesEnzymes are biological substances that has the ability to increase the rate of a chemical reaction without changing at the end of the reaction.
The features of an enzyme include:
They possess great catalytic power and a small amount can easily catalyze a chemical reaction.They speed up reactions but remain unchanged during the whole reaction.There are synthetic and biological enzymes. The biological enzymes are enormously efficient, much more so than synthetic catalysts because biological enzymes has more affinity for its substrate than the synthetic enzymes.
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Which types of organisms typically reproduce by binary fission
Many prokaryotic organisms such as bacteria reproduce by the process of binary fission.
Compare the movement of oxygen and carbon dioxide across the cell membrane. (4 marks)
help pls answer in paragraph form :)
Answer:
Molecules naturally disperse from areas of higher concentration to lower concentration.
As oxygen-rich (and carbon dioxide-poor) blood travels by a cell the oxygen diffuses through the cell membrane to the area of lower concentration inside the cell. It can do this easily because the oxygen molecule (O2) is very small and has no charge or polarity. The oxygen is used up rapidly by mitochondria. This rapid consumption causes oxygen to constantly move into the cell from the blood.
The mitochondria creates carbon dioxide (CO2) as a waste product of cellular respiration (the process that makes energy for your body). Because the CO2 is of a higher concentration in the cell than in the blood passing by, this gas continually diffuses out of the cell. It too is small and uncharged so it can pass through cell membranes easily.
These movements require no energy (in the form of ATP) on behalf of the cell.
Explanation:
genetic engineering is widely used in the field of agriculture and medicine. justify the impact of genetic engineering on humans and the environment.
Answer:
Biotechnology is the use of biological techniques and engineered organisms to make products or plants and animals that have desired traits.
Explanation:
People have used biotechnology processes, such as selectively breeding animals and fermentation, for thousands of years. Late 19th and early 20th century discoveries of how microorganisms carry out commercially useful processes and how they cause disease led to the commercial production of vaccines and antibiotics. Improved methods for animal breeding have also resulted from these efforts. Scientists in the San Francisco Bay Area took a giant step forward with the discovery and development of recombinant DNA techniques in the 1970s. The field of biotechnology continues to accelerate with new discoveries and new applications expected to benefit the economy throughout the 21st century.
In its broadest definition, biotechnology is the application of biological techniques and engineered organisms to make products or modify plants and animals to carry desired traits. This definition also extends to the use of various human cells and other body parts to produce desirable products. Bioindustry refers to the cluster of companies that produce engineered biological products and their supporting businesses. Biotechnology refers to the use of the biological sciences (such as gene manipulation), often in combination with other sciences (such as materials sciences, nanotechnology, and computer software), to discover, evaluate and develop products for bioindustry. Biotechnology products have made it easier to detect and diagnose illnesses. Many of these new techniques are easier to use and some, such as pregnancy testing, can even be used at home. More than 400 clinical diagnostic devices using biotechnology products are in use today. The most important are screening techniques to protect the blood supply against contamination by AIDS and the hepatitis B and C viruses.
Applications of Genetic Engineering
Genetic engineering means the manipulation of organisms to make useful products and it has broad applications.
A salmon is able to swim upstream in a river because of energy it obtains
directly from
Answer:
it obtains its energy directly from it's food
Explanation:
Glucose is a molecule that can move across the cell membrane. If the
concentration of glucose is higher outside the cell than inside the cell, then
what will happen by the process of diffusion?
Yea so what do i do?
Answer:
The right answer is B. Glucose molecules will diffuse out of the cell
Explanation:
Diffusion refers to the natural tendency of a system to homogenize the concentrations of chemical species within it.
which is a nonmendelian trait
Answer:
Polygenic traits are considered non-Mendelian because their alleles are located on more than one gene which allows for more alleles and phenotypes.
Explanation:
Examples of polygenic traits are hair color and height. Other traits, such as blood type, show codominance, where there is no dominant or recessive allele.