Which step in an experimental investigation is not included in a comparative
investigation?
OA. Making observations
B. Collecting data
OC. Asking questions
OD. Forming a hypothesis
The step in an experimental investigation that is not included in a comparative investigation is forming a hypothesis (option D).
What is a comparative investigation?A comparative investigation is one of the three types of an experimental investigation, which involves the collection of data on a variable under conditions for the purpose of comparison.
A scientific investigation is a process of finding the answer to a question using various research methods.
Unlike the experimental and descriptive investigations, the comparative investigation does not require a hypothesis to be constructed because one is not testing for cause and effect.
In a comparative investigation, the relationship between two variables are usually compared.
Example of a comparative investigation is measuring the amount of runoff that two streams produce and comparing both measurements.
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What are the two things that muscle tissue can do?
Answer: Support the weight of your body and help you move.
Explanation:
Answer:
move, be still
Explanation:
not sure if your looking for something more in depth but this is the basics
1. Do car accidents increase your car insurance cost?
Independent Variable:
Dependent Variable:
What is the effect of
Independent Variable.
On
Dependant Variable
Answer:
Yes.
Explanation: Yes,
Independent Variable is the insurance cost, the dependent variable is the car.
The cost of the cars insurance is the effect. I hope this helps :)
When viewing the euglena in lab, you should be able to positively identify the _________ and __________.
When viewing the euglena in lab, you should be able to positively identify the chloroplasts and stigma.
The slide will exhibit both amoeba and euglena, which are frequent in pond water and pond weed, when examined under a microscope. Students can also see amoeba in the sample, but they can tell them apart from euglena. Students will see these organisms (Euglena) in this situation as long-bodied creatures with a whip-like tail on one end.All green plants and algae include chloroplasts. They are the ones who feed the plants. These are located in the mesophyll cells of the plant's leaves. They have an abundance of chlorophyll, which absorbs sunlight. Animal cells do not include this cell organelle.To learn more about euglena.
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Which of these best explains why salivary amylase does not break down proteins?
what is a trait and give an example of a animal trait
Answer:
A trait describes physical or chemical properties of the animal products or features that can influence the process by which an animal product is made. An example of a few traits would be: body structure, skin texture or fur coverings, facial shape, ear, eye and nose size and shape, and body, skin, or fur color.
Explanation:
hope it helps
A researcher observed an amoeba under a microscope. while she watched, the amoeba moved toward a smaller object, surrender, and brought the object inside itself. which two characteristics of life did the amoeba demonstrate?
Answer:
response to stimuli, and obtaining matter and energy
Explanation:
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When scientists use logic to determine the age of one fossil compared to another, they use this
type of dating?
Relative
O Carbon
O Absolute
Answer: Carbon Dating though measuring Carbon-14 levels
Explanation:
Scientist measure the age of a fossil determined on the Carbon-14 level compared to the Carbon-12 level. This method works because:
All organisms after their death stop replenishing the amount of carbon in their body. That means that they will have an equal amount of carbon-12 and carbon-14 until they die. Unlike carbon-12, carbon-14 is unstable and overtime will go through beta decay. Overtime, a carbon-14 neutron will become a proton and release an electron, transforming into nitrogen-14.This leads to a drop in carbon-14 level, and because of this, geologist compare the level of carbon-14 to carbon-12 to determine how long it has taken to reach such stage.Which product would be radioactive if you began the reaction with radioactive carbon atoms in the glucose molecule?
If you started the reaction using radioactive carbon atoms in the glucose molecule, the resultant CO2 would be radioactive.
What is the purpose of the carbon atom?Metal smelting makes use of impure carbon in the form of coke made from coal and charcoal made from wood. It is crucial for the iron and steel industries in particular. Graphite is utilized in furnace linings, electric motor brushes, and pencils. Activated charcoal is employed in filtering and purification processes.
What is the carbon atom's structure?Two electrons make up the first electron shell of carbon, while four of the eight possible spaces are found in the second electron shell. The electron shells of carbon are two. When two atoms come together to create bonds, their electrons from the outermost shell are shared.
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After swallowing, in what order does food pass through the regions of the gi tract?.
Stomach. Glands in your stomach lining make stomach acid and enzymes that break down food.
What is Stomach?Humans and many other animals, including numerous invertebrates, have a muscular, hollow organ called the stomach in their gastrointestinal tracts. The stomach is a crucial organ in the digestive system and has a dilated configuration. Following chewing, the stomach participates in the gastric phase of digestion. Using enzymes and hydrochloric acid, it performs a chemical breakdown.
The stomach is situated between the oesophagus and the small intestine in humans and many other animals. To aid in food digestion, the stomach secretes gastric acid and digestive enzymes. The pyloric sphincter regulates how food that hasn't fully broken down (called chyme) moves from the stomach to the duodenum, where peristalsis takes over to move it through the rest of the intestines.
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When an organisms passes on some unique traits to their offspring, which characteristic of life is this?
Growth and development
Organization
Homeostasis
Heredity
Epinephrine inhibits salivary gland activity and muscle cell contraction in the airways, yet stimulates glycogen release in muscle cells and heart muscle cell contraction. How could one hormone have opposing effects on different organs?.
Answer:
Cells in the different tissues would have epinephrine receptors coupled to different signaling pathways.
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a common mechanism by which sensor cells in the host detect micro-organisms relies on the production of unique microbial components not found in the host. propose a strategy by which a clever microbe could evade this type of response.
By the production of protein by microbe which is similar to the host protein is the clever way by which microbe could evade this type of response.
Microbes- Microbes are extremely minute living entities that are all around us and are invisible to the unaided eye. They are aquatic, terrestrial, and avian organisms. Millions of these bacteria, which are also referred to as microorganisms, reside in the human body. While certain microorganisms make us ill, others are vital to our wellbeing.
Protein- Living things include chemical molecules called proteins. They perform several different tasks, such as organizing, transportation, and defense. A protein can have up to four different structural levels and is made up of chains of amino acids.
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What type of transport requires energy to carry a nutrient from outside the cell, through the cell membrane, and into the cell?.
Active transport requires energy to carry a nutrient from outside the cell, through the cell membrane, and into the cell.
What are passive and active modes of transportation?In contrast to passive transport, which does not require energy for the movement of molecules, active transport does. While in passive transport, molecules travel along the concentration gradient, active transport involves molecules moving against the gradient.
Active transport moving against the concentration from lower concentrations to higher concentrations. Active transport mechanism expands energy.
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design solution to treat sewage water in anaerobic digestion
An anaerobic treatment cycle entails wastewater entering a bioreactor plug socket containing sludge, a thick semi-solid substance rich in anaerobic bacteria and other microorganisms that break down the organic contaminants in the wastewater.
What is anaerobic digestion?Anaerobic digestion is a process in which bacteria break down organic matter in the absence of oxygen, such as animal manure, wastewater biosolids, and food waste.
Anaerobic digestion is the most commonly used sludge treatment method. In this process, a significant portion of the organic matter (cells) is broken down into carbon dioxide (CO2) and methane (CH4) in the absence of oxygen.
Thus, this is the way to treat wastewater anaerobically.
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21. How long does it take a star to get back to the same position in the sky it was the night before?
a. 23 hr 40 mins
b. 24 hrs
c. 24 hrs 5 mins
d. 23 hrs 56 mins
Answer: 23 hrs 56 min
Explanation: Because the earth rotates a full rotation in 24 hrs so the star will be in the same spot just before the full rotation is done.
one can measure time by the fractional distance a star has gone in its full circle around the sky. This is best done for stars that never set, stars near the north celestial pole.
Some types of cell retain the ability to differentiate into other types of cell. Are these
cells more common in animals or plants?
Answer: meristematic cells in higher plants and embryonic stem cells in animals.
Explanation:
a cell that can differentiate into all cell types of the adult organism is known as pluripotent.such cells are called meristematic cells in higher plants and embryonic stem cells in animals.
Answer:
a cell that can differentiate into all cell types of the adult organism is known as pluripotent, such cells are called meristematic cells in higher plants and embryonic stem cells in animals.
What happens to the sodium ions and chloride ions when put in a beaker of water?
Answer:
Explanation: thanks for the points
what is the connection between latitude and solar energy
Answer:
The lowest latitudes get the most energy from the Sun. The highest latitudes get the least. The difference in solar energy received at different latitudes drives atmospheric circulation. Places that get more solar energy have more heat.
Explanation:
Does osmosis require the use of energy to transport water across a cell membrane?.
Answer:
No
Explanation:
Osmosis is not require any energy. It's a passive transport.The way it works is :
Water moves along the concentration gradient.Water moves towards the more concentrated solution
You are doing a study on the enzymatic effects of lysosomes and want to follow the whole process from the formation of the enzymes to their use in the lysosome. In what location of the cell would you begin this observation?.
You are doing a study on the enzymatic effects of lysosomes and want to follow the whole process from the formation of the enzymes to their use in the lysosome. The endoplasmic reticulum (ER) is the place where this observation will begin.
As we want to begin with the process of formation of enzymes, hence Endoplasmic reticulum (ER) will be the place to begin. This is because the endoplasmic reticulum (ER) is the place in the body that plays a central role in the synthesis of proteins.
The ribosomes are attached to the rough endoplasmic reticulum which is responsible for the translation process of mRNA that results in protein formation. The endoplasmic reticulum plays a central role in the formation of proteins.
Hence, to begin studying the formation of enzymes, such as lysosomes, we will begin with the endoplasmic reticulum (ER).
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If the mitochondria and chloroplasts in eukaryotic cells resulted from endosymbiosis between various prokaryotes, what features should these organelles have?.
According to the endosymbiotic theory, some of the organelles in eukaryotic cells of the present day were once prokaryotic microorganisms.
What is endosymbiotic theory?According to this hypothesis, the first eukaryotic cell was most likely a cell resembling an amoeba that obtained nutrients through phagocytosis and had a nucleus that developed when a portion of the cytoplasmic membrane pinched off around the chromosomes
As with prokaryotic cells, chloroplasts are the same size, divide via binary fission, and have Fts proteins at their division plane.
The mitochondria of some protists have Fts homologs at their division plane and are the same size as prokaryotic cells. They divide by binary fission.The DNA in mitochondria and chloroplasts is circular rather than linear.The ribosomes found in mitochondria and chloroplasts have 30S and 50S subunits rather than 40S and 60S.Therefore, According to the endosymbiotic theory, some of the organelles in eukaryotic cells of the present day were once prokaryotic microorganisms.
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The unit of radiation absorbed energy or dose, is used for biology material only.
true or false
It is True, the unit of radiation absorbed energy or dose, is used for biology material only.
What is Absorbed Dose?The average dosage that is absorbed over an organ or tissue is commonly used to determine absorbed dose. This is obviously oversimplifying the true scenario. When an organ or person is exposed to radiation, the dosage is typically not homogenous throughout the volume of the organ.
The idea that the harm will occur whether the organ is exposed to radiation consistently or unevenly is a simplification that is adopted. This is certainly not true in severe situations, but if the nonuniformity is around 50% or less throughout the organ or person of interest, the mean organ dosage definitely may be employed successfully.
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pseudomonas aeruginosa represents a well-studied model organism for single-species biofilm formation. this research is also of direct medical significance because of the propensity of these bacteria to form biofilms in the
Pseudomonas aeruginosa represents a well-studied model organism for single-species biofilm formation. This research is also of direct medical significance because of the propensity of these bacteria to form biofilms in Cystic fibrosis (CF) patients.
Pseudomonas aeruginosa is a multidrug-resistant pathogen acknowledged for its pervasiveness, its inherently evolved antibiotic resistance mechanisms, and its relationship with severe infections such as various sepsis syndromes.
Cystic fibrosis (CF) is a genetic disorder that induces sticky, viscous mucus to form in organs, commonly in the lungs and the pancreas. In people who have cystic fibrosis, viscous mucus blocks the airways and causes breathing difficulty. Control includes methods of clearing lungs and a controlled diet.
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This question is not complete the complete question is:
Pseudomonas aeruginosa represents a well-studied model organism for single-species biofilm formation. This research is also of direct medical significance because of the propensity of these bacteria to form biofilms in _________ patients.
what is the function of structure e? the cell membrane. each letter marks a definite structure of the membrane. letter a marks the structure represented by a branched sequence on the integral protein. b marks a branched structure on the cell membrane. c marks a large elongated structure outside the cell. d marks part of the membrane, which consists of two rows of molecules. each molecule has a head and a tail. e marks a molecule, which is one of the membrane components. such molecules are randomly integrated in the membrane. f marks a structure that penetrates two layers of the membrane. what is the function of structure e? the cell membrane. each letter marks a definite structure of the membrane. letter a marks the structure represented by a branched sequence on the integral protein. b marks a branched structure on the cell membrane. c marks a large elongated structure outside the cell. d marks part of the membrane, which consists of two rows of molecules. each molecule has a head and a tail. e marks a molecule, which is one of the membrane components. such molecules are randomly integrated in the membrane. f marks a structure that penetrates two layers of the membrane. detection of environmental change cell-cell communication stabilization of the phospholipids structural support of the cell transport across the plasma membrane
stabilization of the phospholipids -Cholesterol helps to stabilize the structure of the plasma membrane.
What is plasma ?Of the four basic states of matter, plasma is one. It comprises a substantial amount of ions and/or electrons, which are both types of charged particles. The main distinction between plasma and the other elementary forms of matter is the presence of these charged particles. Being largely linked to stars, such as the Sun, it is the most prevalent type of ordinary stuff in the universe. It reaches to the rarefied intracluster medium and perhaps even to areas outside of our galaxy. Heating a neutral gas or exposing it to a powerful electromagnetic field can produce plasma artificially.
Plasma is electrically conductive due to the existence of charged particles. Individual particle dynamics and macroscopic plasma motion are controlled by collective electromagnetic fields, and both are extremely sensitive to externally imposed fields.
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Ten grams of sugar is placed in a beaker with 100ml of water. Initially, the sugar is at the bottom of the beaker however once gradually heated the sugar disappears. Which statement best explains what type of change occurred?
The dissolution of sugar in water is an example of a physical change as no new substance is formed and it is easily reversible.
What are chemical and physical changes?Physical changes are changes that occur in the physical properties of substances.
The properties of physical changes include:
no great heat changes occurthey are reversibleno new substances are formed.Chemical changes are changes that occur in the chemical properties of substances.
The properties of chemical changes include:
great heat changes occurthey are not easily reversiblenew substances are formed.Considering the dissolution of sugar in water, no new substance is formed, instead a mixture of water and sugar is obtained. Also, the change is easily reversible as the sugar can be obtained by heating tue mixture to evaporate the water.
herefore, it is an example of a physical change.
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Note that the complete question is given below:
When sugar in a beaker is heated over a low flame, the solid crystals disappear and a thick, yellow-brown liquid forms. Determine whether this change is a chemical reaction or a physical change.
chemical reaction
physical change
What happens at 0° Kelvin? Select the best answer. (1 point)
O At 0° K, or absolute zero, all particle motion stops.
O A substance will lose both shape and volume.
O Particles have enough kinetic energy to begin to move.
O Particle motion slows to a vibration, preventing particles from escaping forces of attraction.
Answer:
A
Explanation:
Took the test
At 0° Kelvin or absolute zero, all particle motion stops. Thus, option A is correct.
What is absolute zero?
The lowest limit of the thermodynamic scale that measures temperature is known as absolute zero. It is also a condition in which entropy and enthalpy of a ideal gas which is cooled reached to its maximum value and the reading is taken as zero kelvin.
Absolute zero is also the lowest energy temperature in the thermodynamics and there is no cooling of an object on temperature that is exactly absolute zero.
Thermal energy is also hold a conservation of energy it means energy can't be created nor be destroyed but in real world when energy is transformed from one system to another system the efficiency is always decreases. So we can say that loss of energy is takes place but it's loss to friction or resistance in term of mechanics.
Thus, At 0° Kelvin or absolute zero, all particle motion stops. Thus, option A is correct.
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3. As part of a laboratory experiment, a thin slice
of peeled raw potato weighing 10 grams is
placed in an oven at 80°C. After 5 hours, the
potato sample is removed from the oven and
weighed again. The purpose of this experiment
might be to
(1) test for the presence of starch in living
tissues
(2) isolate cells in various stages of cell division
(3) determine the water content of potato
tissue
(4) study the rate of photosynthesis in potatoes
The purpose of the experiment might be to determine the water content of the potato tissue.
How is the water content of tissues determined?The water content of substances can be determined in the laboratory by heating the substance to a constant weight.
First, one must ensure that the substance is not destroyed by heat. The initial weight of the substance is recorded. The substance is then heated and reweighed after some time.
The weight is recorded again and the substance is returned to the oven. This process is repeated until a constant weight is achieved.
In order to determine the water content, the final weight of the substance is then deducted from the initial weight.
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An undersupply of which neurotransmitter has been linked with depression? group of answer choices
An undersupply of serotonin neurotransmitter has been linked with depression.
What is serotonin?A monoamine neurotransmitter called 5-hydroxytryptamine is serotonin (5-HT). Additionally, it affects hormones.
As a neurotransmitter, serotonin transmits and receives messages from nerve cells in the body's central nervous system and peripheral nervous system. Chemical instructions are sent to your body on how to function.
Serotonin regulates body temperature, sleep, hunger, and sexual activity in addition to having an impact on learning, memory, and happiness. Mania, anxiety, melancholy, and other disorders are thought to be exacerbated by serotonin deficiencies.
Therefore, a lack of serotonin has been linked with depression.
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This table shows the codons found in messenger RNA. Using this information, what sequence of nucleotides in the template strand of DNA could code for the polypeptide sequence Val-Asp-Ser?
The template strand of DNA has the nucleotides CAA-CTA-TCG in order.
The correct option is B.
What are codons?Three DNA or RNA nucleotides make form a codon. These codons are constructed to code for a procedure such as protein synthesis or the creation of stop signal codons. For various bodily processes, different amino acids are required. The Ala, Gly, Pro, Thr, and Val codons are four.
What is the function of codons?Any of the 64 different DNA triplet sequences that either encode information for the creation of a particular amino acid or act as a stop signal to end translation (protein synthesis). You can code for more information the more bases there are per codon. Since there are only 22 distinct amino acids, we require at least 3 bases for each codon.
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The complete question is -
This table shows the codons found in messenger RNA. Using this information, what sequence of nucleotides in the template strand of DNA could code for the polypeptide sequence Val-Asp-Ser?
A- GUU-GAU-AGC
B- CAA-CTA-TCG
C- GTT-GAT-AGC
D- CAA-CUA-UCG