A student is conducting an experiment to determine what type of soil earthworms prefer, wet or dry. Ten earthworms are released into a cardboard box that contains dry soil on one side and wet soil on the other. Over 24 hours, the student records the number of earthworms on both sides every hour.
What component of the above experiment is the dependent variable?
species of worm used
number of trials
soil mosisture
average number of earthworms in each type of soil
“any process used to ask and answer testable questions about observations of the natural world” defines which terms
Answer:
Scientific research is based on the scientific method. The objective of a scientific investigation is to obtain information based on observations to solve questions and understand the natural phenomena that surround us. In a scientific investigation it is important to be clear about the research question, the initial hypothesis, the methodology and how the results will be analyzed.
Hydrogen bonding results in two processes which we see as ____ and ____
Answer:
Disassociation, polarization and attraction
Explanation:
In an hydrogen bond, the hydrogen act as partially positive atom while the other element to which it is bonded act as partially negative atom. This second element other than the hydrogen can be oxygen, fluorine, chlorine etc.
First the hydrogen bonds disassociates and polarizes thereby forming two poles one positive and the other one negative.
The positive poles now try to attract the negative pole of other molecule of the same substance or any other substance. The same happens with the negative pole also.
The gradual replacement of regionally distinct ecological communities with cosmopolitan communities that reflect the increasing global activity of humans is referred to as __________.
A practical orthography in which one glyph corresponds (roughly) to a single consonant-vowel sequence.
Trout are found in rapidly flowing streams that have high levels of oxygen, stony bottoms, and an abundance of aquatic insects.
These streams represent a trout's______
Niche
Biome
Habitat
Community
Internal respiration requires a higher oxygen concentration in the _____ than in the _____.
If two pea plants are heterozygous dominant for yellow seed color, with green seed color being recessive, what will the pea offspring possibly look like?
what are three examples of matter besides water that are transported through ocean currents
Final answer:
Ocean currents transport sediments, thermal energy, nutrients, and dissolved gases, each affecting climate and marine life differently.
Explanation:
Aside from water, three examples of matter that are transported through ocean currents include sediments, thermal energy, nutrients, and dissolved gases. Sediments are often carried by currents from one location to another, affecting both marine ecosystems and the shape of the shoreline. Furthermore, thermal energy is transported particularly through global oceanic currents, influencing climate patterns. Nutrients and dissolved gases, such as oxygen, carbon dioxide, and others integral to life, are distributed across marine environments through the currents, impacting local and global ecosystems.
Which is not a problem associated with the increased use of nuclear energy?
A. the possibility of a serious nuclear accident
B. too many nuclear explosions in reactors
C. the cost of building safe nuclear facilities
D. major hazards involved in nuclear waste disposal
Please explain your answer! :)
B. too many nuclear explosions in reactors
Explanation;Nuclear power involves the use of nuclear reactions which produce nuclear energy which in turn generate heat, that is used in steam turbines to produce electricity in a nuclear power plant.Nuclear power is not associated with production of green house gases such as carbon dioxide, sulfur dioxide, etc, like fossil fuels. However it is associated with a number of problems which include; Cost of building safe nuclear facilities, major hazards involved in nuclear waste disposal and the concern over the possibility of a serious nuclear accidentwhich process provides the energy used to make ATP from ADP?
Answer:
Option A, the break down of food molecule
Explanation:
During hydrolysis of ATP, 1 molecule of phosphate is released and ADP is formed
The hydrolysis of ATP to produce ADP is a reversible reaction and thus ADP uses the extra energy with in the cell to convert back to ADP. This extra energy comes from the food break down.
The reactions involved are as follows
Hydrolysis of ATP
ATP ----> ADP + P + energy
Formation of ATP from ADP
ADP + P + energy --------> ATP
The combining form that refers to the male gland that encircles the upper end of the urethra is:
The combining form referring to the male gland that encircles the upper end of the urethra is 'prostat/o' which relates to the prostate gland. It is used in medical terminologies like 'prostatitis' and 'prostatectomy'.
Explanation:The combining form that refers to the male gland that encircles the upper end of the urethra is 'prostat/o'. This form is derived from the word prostate, which is the name of the gland in question. The word 'prostate' itself comes from a Greek word meaning 'one standing in front', referring to its location in the body. The prostate gland plays a crucial role in sexual functions and in the process of ejaculation.
For instance, in medical terminology, you may see this combining form used in words like 'prostatitis', which is inflammation of the prostate gland, or 'prostatectomy', which is the surgical removal of all or part of the prostate gland.
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Gene families are groups of _______ genes that arose by _______ and _______. homologous; gene duplication; sequence evolution homologous; speciation; sequence evolution homologous; gene duplication; genetic drift heterologous; gene duplication; sequence evolution heterologous; speciation; genetic drift
The term _________________ is used to identify a scientist who studies fossils.
While observing slides under a microscope, jack adjusts the microscopes mirror so that a circle of light can be seen. Which microscope is jack using?
Jack is likely using a compound light microscope, which uses visible light through lenses to magnify specimens. He's adjusting the mirror for proper lighting and may need to refocus the microscope after switching to a higher magnification lens.
If Jack is adjusting the microscope's mirror to see a circle of light, he is likely using an optical microscope, specifically a compound light microscope. This type of microscope uses visible light and lenses to magnify objects and is the most commonly used microscope in many scientific fields. The purpose of the mirror is to direct light up through the bottom of the stage where the slide is placed so that the object being viewed is illuminated. This light then passes through the objective lenses, which magnify the specimen. Jack might also be adjusting the light intensity to ensure adequate lighting for a sharp and clear observation.
When Jack switches from a 10X to a 40X objective lens, as described in Laboratory Exercises in Microbiology, he must re-focus using the fine adjustment knob and potentially adjust the light again to ensure the specimen is still in sharp focus under this increased magnification. With a compound light microscope, after focusing with the low power lens, one usually rotates the nosepiece to switch to a higher power lens and refocus using only the fine adjustment knob to bring out the details of the specimen.
Both euglena and Cyanobacteria are photosynthetic unicellular organisms found in pond water. The feature that distinguishes euglena from Cyanobacteria is the-
A. Ability to maintain homeostasis
B.presence of ribosomes
C.presence of nuclear membrane
The correct answer is option C, that is, the presence of the nuclear membrane.
Cyanobacteria is a phylum of bacteria that attain their energy via the process of photosynthesis, and are the only photosynthetic prokaryotes possessing the tendency to generate oxygen. As a prokaryote, they are devoid of the nuclear membrane.
Euglena refers to a single cell flagellate eukaryote. It comes under the class Euglenoidea. The species of Euglena are witnessed in salt water and in freshwater. Being a eukaryote, they possess nuclear membrane.
The difference between them is the presence of nuclear membrane in euglena.
A unicellular organism is an organism that possess only one cell. Usually, here are organelles in the cell that enables the organism carry out its functions
Euglena is;
PhotosyntheticUnicellularHas a cell membraneSo, euglena and Cyanobacteria are photosynthetic, they are able to manufacture their own food. However, the difference between them is the presence of nuclear membrane in euglena.
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What role do cfcs play in the catalytic destruction of ozone?
Which term best describes the condition of red blood cells when placed in a hypotonic solution?
How does a catalyst influence a chemical reaction?
Answer:
It decreases the amount of energy necessary for the reaction to proceed.
The enzyme known as ‘catalase’ is involved in the breakdown of hydrogen peroxide molecules into separate water and oxygen molecules. During this reaction, what happens to the ‘catalase’?
The enzyme known as ‘catalase’ is involved in the breakdown of hydrogen peroxide molecules into separate water and oxygen molecules helps speed up or speed slow down the reaction as it is an enzyme.
What is enzymes ?These are the biological catalysts that help to slow down or breakdown the rate of reaction that is the reaction in which the reactants are getting broken down into products.
Catalase enzyme that will help to breakdown the hydrogen peroxide into its products as mentioned in the equation which help to catalyse the reaction but remain unaltered on itself that is enzymes do follow the lock and key mechanism.
The substrate and enzyme fit into each other like the lock and key but after the condition change of reactants into products, the substituents remain unchanged and without getting used gets released out from the reaction.
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What type of connective tissue is found only in the umbilical cord?
which macromolecules were present in the unknown solution?in the milk?
Macromolecules contain large number of atoms. Milk contains both carbohydrates and proteins, because it gave a positive result upon the addition of Benedict’s solution which indicated an orange color. It means that there is a concentration of reducing sugars in milk.
Geologists recognize three major types of plate boundaries, which are:
Geologists recognize three major types of plate boundaries, which are divergent, convergent plate boundaries, and transform plate boundaries.
What are Divergent Plate Boundaries?Divergent Plate Boundaries are two plates that move away from each other and as the plates move apart, magma rises to fill the gap to create a new crust. Divergent boundaries are found at the bottom of the ocean to create mid-ocean ridges.
Convergent Plate Boundaries involve two plates moving toward each other. When two plates collide, one plate is forced under the other, and the process is called subduction, thereby, creating deep ocean trenches, volcanic activity, and mountain ranges.
Transform plate boundaries involve two plates moving past each other horizontally where the plates grind against each other, thereby, creating faults and earthquakes.
Therefore, divergent plate boundaries, convergent plate boundaries, and transform plate boundaries are the three major types of plate boundaries recognized by geologists.
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During what stage of complete cellular respiration is most of the atp produced
Why does pharmaceutical advertisement leads to drugs addition?
Describe the relationship between cellular respiration and photosynthesis in terms of energy and matter.
The products formed in the process of photosynthesis are used up in the process of cellular respiration for the production of ATP (adenosine triphosphate) in the mitochondria of cell.
What is Cellular respiration?
Cellular respiration and photosynthesis are the two basic life processes which takes place in plant cells. Cellular respiration takes place in all types of organisms, it is responsible for the production of energy in the form of ATP which is utilized by the cell in different functions.
The products formed during the process of photosynthesis i.e., glucose and oxygen molecules are utilized by the cell in the process of cellular respiration. In cellular respiration, the oxidation of glucose (carbohydrate) takes place in the mitochondria of cell which generates energy.
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(Forensics) The first insects to arrive at a death scene are the ______.
blowfly maggots
blowfly larvae
blowfly pupae blowfly
adults looking for a place to lay their eggs
Answer:
d
Explanation:
obviously.
A 12 year-old patient had an adenoidectomy in 2013 and a second adenoidectomy this year. what cpt® code(s) is/are reported for the second adenoidectomy performed this year
The primary CPT code for an adenoidectomy is 42820. For a second adenoidectomy performed on the same patient in the same year, it could be coded as a repeat procedure using the modifier -76 or -77 after the main code.
Explanation:The CPT® (Current Procedural Terminology) code for an adenoidectomy is generally 42820 for a single adenoidectomy or 42821 for adenoidectomy with tonsillectomy. But, if this is a second adenoidectomy performed on the same patient in the current year, then it could be coded as a repeat procedure using the modifier -76 or -77 following the primary code, depending on whether the same physician or a different one performed the procedure. For instance: 42820-76 or 42820-77.
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The substance that covers the majority of earth's surface and also makes up the largest percentage of your cells is
Which rna molecule brings new amino acids to the growing protein chain in translation?