Which type of bond forms between two water molecules?
ionic
covalent
isotonic
hydrogen
Part d true or false? biologists studied the effects of forest fragmentation by calculating the difference between the amount of plant biomass in the edges of forest fragments and the interiors of unfragmented forest.
List and describe the four common passageways for non water molecules entering or exiting the cell
Final answer:
The cell membrane utilizes four main passageways for non-water molecules: passive osmosis and diffusion for gases and small molecules; transmembrane protein channels and transporters for small organic molecules; endocytosis for large molecules or cells; and exocytosis for removing or secreting substances.
Explanation:
The cell membrane controls the movement of substances into and out of the cell, utilizing different passageways for non-water molecules. These include:
Passive osmosis and diffusion: These processes allow for the transport of gases (such as O₂ and CO2) and other small molecules and ions without the requirement of energy input from the cell.
Transmembrane protein channels and transporters: Specific proteins facilitate the movement of small organic molecules, such as sugars or amino acids, across the cell membrane.
Endocytosis: This pathway enables the transportation of large molecules or even whole cells into the cell by engulfing them through the cell membrane.
Exocytosis: Conversely, exocytosis involves the removal or secretion of substances, such as hormones or enzymes, from the cell.
The cell membrane's selective permeability ensures that only specific substances can pass through, maintaining the cell's internal environment.
If a splice site sequence was mutated so that splicing did not take place, what would the effect be on the mrna
"what percentage of primary energy is used for transportation in developing countries"
It is so important in our everyday lives to be able to evaluate if a claim is truly scientifically reliable or not. Often, advertisements will claim to have “proven results”. Can you evaluate if this is a reliable claim or not?
Give an example of 3 questions you can ask yourself to determine if a claim is scientifically reliable or not:
1
2
3
Cells are largely made of organic compounds that contain carbon. Which property of the carbon atom makes it an essential component of organic compounds?
Carbon is solid at room temperature.
Carbon can form four covalent bonds.
Carbon is a nonmetal.
Carbon oxidizes to carbon dioxide.
Answer:
I think it might be B
Explanation:
If you search if Carbon can from four covalent bonds it can. And it wont matter if its a non metal and if its solid at room temperature so I think its B. Please correct me if im wrong.
How do most small molecules cross the cell membrane?
Answer:
the structure of the lipid bilayer allows small,uncharged substances such as oxgen.and the carbondioxiode,and hydrophobic moleclues such as lipid to pass through the cell membrane
The sun is the ultimate source of energy for terrestrial ecosystems. approximately how much of the potential energy available from the sun s rays hitting the earth is used in photosynthesis? 50% 25% 10% 1%
what would happen to cell division if a chemical was put in the cell that did not allow for cell division to occur
If a chemical will put in a cell division during the cell division, cell division will stop.
Cell division:
The ability of a cell to divide further is called cell division. There are two kinds of cell division: mitosis and meiosis.
Mitosis is an equational division while meiosis is a reductional division. Cell division is essential for growth and development of the body. It is divided into prophase, metaphase, anaphase and telophase.
Colchicine is a chemical which stops the cell cycle. Cell cycle is divided into M phase, interphase and S phase. Tumor suppressor genes are also involved in growth and development of cell
Therefore, If a chemical will put in a cell division during the cell division, cell division will stop.
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Those members of the population who are capable of developing a disease or condition are known as:
Answer:
The correct answer is - The population at risk.
Explanation:
The population at risk is the population that is prone or capable of developing a disease or the more likely to exposed by the presence of the event that is vital such as diseases.
The population that are at higher risk for any event that is leads to a condition that decreases or negatively affects the population.
Thus, the correct answer is - the population at risk.
Is baking powder a homogeneous or heterogeneous mixture?
The highly conserved sequence element present within homeotic genes is called the __________.
Evidence for the theory that an atom is mostly empty space was supported by research of which of these scientists
On a nutrition label, what section tells you what is in the food in order from the largest amount to the smallest amount?
The Ingredients List on a nutrition label tells you what is in the food in order from the largest amount to the smallest amount, as it lists the ingredients by weight from most to least. The nutrition label also provides information on the macronutrient content (proteins, fats, and carbohydrates) of the food.
Explanation:By law, food manufacturers are required to list all ingredients in descending order of predominance by weight. This means that the ingredient that weighs the most is listed first, and the ingredient that weighs the least is listed last. For example, if sugar is listed as the first ingredient on a nutrition label, that means there is more sugar in that product than any other ingredient.
In addition to the ingredient listing, the nutrition label also provides information on the macronutrient content (proteins, fats, and carbohydrates) of the food. These macronutrients are broken down further to show the energy content per serving in the form of calories.
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A certain type of diploid organism has 38 chromosomes. how many chromosomes would a gamete of this organism have?
Organic matter in soil is also called _____.
loam
talus
humus
regolith
Answer:
The correct answer would be humus.
Humus is the organic material of the soil formed by the decomposition of the dead plants and animals. It is thick and dark in color (brown or black) and can also be produced by the process of composting.
It is very for the soil as it adds moisture to the soil, enhances the structure of the soil which increases the aeration and drainage.
It favors the growth of organisms (such as earthworm) helpful for the growth of plants and adds lots of nutrients to the soil, specially nitrogen.
In contrast, loam is a type of soil which is composed of silt, sand, and clay in 40-40-20 ratio. Regolith referred to the superficial layer covering the solid rocks or bedrock. It is formed by the accumulation of soil, dust, broken rocks etc on the bedrock.
Lastly, talus referred to the slope which is formed by deposition of shattered rock debris at the base of a cliff.
Stimulants speed up brain and spinal cord activity.
a. True
b. False
Answer:
true
Explanation:
Which of these is an important part of the scientific process?
Answer:
A. Observation
Explanation:
The scientific process starts with observation as a tool to acquire information.
The objectives are to get new knowledge based on observing, experiment, and creation of new theories.
Science is objective, and don't care about religion, nationality, and phrenology.
How do factors, such as trade, war, migration, and inventions, affect cultural change
How do activities in the large intestine maintain homeostasis?
What type of vaccine is the live, weakened measles virus? what type of vaccine is the live, weakened measles virus? attenuated whole-agent vaccine nucleic acid vaccine toxoid vaccine subunit vaccine conjugated vaccine?
Which geochemical cycle involves mantle convection?
Answer:
The rock cycle ( including the plate tectonic movement)
Explanation:
The geochemical cycle refers to the transportation of chemical elements from the subsurface region to the surface of the earth. This cyclic process is controlled by the geological and chemical factors.
The rock cycle is one of the type of geochemical cycle which involves the convection current in the mantle.
The earth's crust is comprised of lithospheric plates and the rocks that are present here are made up of numerous chemical elements such as Carbon, Phosphorous, and many more. These plates move over the viscous asthenosphere layer due to the convection current that generates in the mantle. It is due to the radiation of heat energy from the interior of the earth. These plates when moves, share a convergent, divergent and a transform type of plate boundary. As a result of which these chemical elements are also transported along with these plates.
In a convergent plate boundary the denser plate subducts carrying its chemical elements and in a divergent plate boundary, the deep seated rocks with various chemical constituents are carried to the surface forming new crust.
Thus, the rocky cycle plays an important role in carrying the chemical elements by the process of plate motion that generates in the mantle due to the convection current.
Name four biochemical reactions that can be observed in kia medium
Which distinguishes vertebrates from invertebrates?
A) Invertebrates live in the ocean.
B) Invertebrates develop into fossils.
C) Vertebrates are predators.
D) Vertebrates have a central nervous system.
While conducting a physical examination of the cardiovascular system, the nurse hears fine crackles on auscultation of the lungs. this finding is most likely a manifestation of which problem?
Two brown eyed parents have produced three blue eyed sons if they have another child what are the chances that it will also have blue eyes
A) blue eyes are dominant in this family so there is a 75 percent chance the next will be blue eyed
B) after having three blue eyed children there is a 0 percent chance of having another
C) both parents carry a recessive allele for blue eyes so there is a 25 percent chance of having another
D) since all their children are blue eyed there is a 100 % chance the next will too
Which of the following is true regarding the cell theory? A.Cells are non-living entities. B.Cells can be formed from living or non-living things. C.Cells are the basic units of life. D.All living organisms are made of one or more cells.
The statement that is true regarding cell theory cells are the basic units of life. Thus, option C is correct.
What is cell theory?Cell is defined as the base of life as it is the structural as well as functional unit of life. Cell is made up of pre existing cells and the cell contain various cell organelles such as mitochondria, endoplasmic reticulum, ribosomes, golgi appratus, nucleus, and cytoplasm.
Basically, cell is of two type one in prokaryotic and another one is eukaryotic. The prokaryotic cell is known as pre mature cells as they do not contain cell organelles and eukaryotic cell are known as advanced and developed cells as they contain several cell organelles.
The unicellular animals are made up of single cell and all the functions carried out in a single cell like amoeba and multicellular organisms are made up of multiple cells and there is specific cell for specific functions.
Therefore, The statement that is true regarding cell theory cells are the basic units of life. Thus, option C is correct.
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Waves transfer energy by pushing and ______ on neighboring particles
Final answer:
Waves transfer energy by pushing and pulling on neighboring particles, where the medium's particles primarily move up and down, emphasizing that waves carry energy and momentum, not mass.
Explanation:
Waves transfer energy by pushing and pulling on neighboring particles. This movement is fundamental in understanding how waves function, contrasting the common misconception that, for instance, water waves push water from one location to another.
In reality, the particles within the medium through which a wave travels (like water) tend to stay in essentially the same location, moving mostly up and down rather than side to side or in the direction of the wave's travel. This movement up and down results from the energy carried by the wave, rather than any significant lateral movement of mass.
This concept underscores that waves can transfer energy and momentum from one location to another without permanently moving mass along with them, serving as a crucial model for the description of various physical phenomena.
Pcr is used to amplify a segment of dna and the enzyme responsible for the replication of dna is