Answer:
Interaction between hydrophobic (nonpolar) amino acid side chains is due to hydrophobic interactions.
Repulsion between negatively charged backbone of DNA double helix is due to electrostatic repulsion forces.
Interaction between water and carbonyl oxygen of guanine is due hydrogen bonding
Explanation:
The hydrophobic effect refers to the tendency of non-polar substances forms aggregates in an aqueous solutions in order to avoid interactions with water molecules. This results in a favorable entropy increase.
For non-polar amino acids, hydrophobic interactions are important in stabilizing their structure wherein they are densely packed within the core of a protein while those with with polar groups are found in the exterior.
The phosphate backbone of DNA is negatively charged. Since like charges repel, therefore, electrostatic repulsion forces of the ions are responsible the repulsion of the backbone DNA double helix.
Hydrogen bonds are formed between electronegative oxygen atoms and hydrogen atoms of neighboring molecules due to the partial negative and positive charges on each of the atoms.
This hydrogen bonding is responsible for the interaction between water and carbonyl oxygen of guanine as the hydrogen atoms of the water molecules are attracted to the oxygen atoms of the guanine molecules due to the partial charges on each of the atoms.
The phenomenon responsible for the maintenance of a column of water as it moves upward through a vessel is _____.
Answer:
Explanation:
Cohesion is the staying together of molecules for other molecules of the same kind to attracts.
Water is a good example of a molecules that have a strong cohesive forces this is because of their ability to form hydrogen bonds with one another.
Cohesion is responsible for transport of water as they move through a vessel. In the xylem tissue of plant the active movements of water from root to stem and leaves is enable by the action of cohesion through a pressure created in the plant that enables the water to be forced up to every part of the plant to enhance growth.
Cohesive forces are also responsible for the tendency of a liquid’s surface to resist rupture when placed under tension or stress.
List examples that illustrate how the structure of a body part makes possible its
function.
What ions are formed when sodium chloride is dissolved in water
Why do you think the whitefish blastula was chosen rather than a sample of adult tissue to view on a slide
Answer:
Explanation:
Blastula is an early stage of embryo development, it is the continuation of t morula which is when the zygote is moved to uterus.
Cells in blastula are actively dividing as formation is still taken place, and are used because this dividing cells are very large and can be easily seen. The chromosomes of Blastula are also more visible than human chromosomes hence necessitates it uses.
9. A student is studying tiny organisms in pond water. How could she better observe critical details to
distinguish among the different organisms?
Smell the sample of pond water
Study a drop of the pond water under a microscope
Rub a few drops of the pond water between her fingers
Look closely at a test tube filled with the pond water
Save
Answer:
Study it under a microscope!
Explanation:
Any organisms in the pond water are more than likely very, very small! Microscopic, even;)
What is the most likely pathway for root cells to obtain energy and identify the organelles involved
Answer:
By breaking down glucose made in photosynthesis with the mitochondria.
Explanation:
Root's cannot undergo photosynthesis but sugar can be transported to the roots through the phloem. Once sugar gets to the root cells, cellular respiration can break down sugar into energy. Cellular respiration starts with glycolysis which occurs in the cytoplasm but the process completes in the mitochondria.
Cells in the roots of plants get their energy through a vascular transportation system within the plant by vessels called phloem.
The energy is produced through photosynthesis and converted to useable energy form by cellular respiration.
Plant veins transport water, nutrients, and energy to the rest of the plant. Plants absorb water and nutrients through their roots and make glucose and transport energy, they use their vascular system to move the water and nutrients up into the rest of the plant and to the roots from leaves.
Plants cells convert light energy or radiant energy to glucose which is transported to the various parts of the plant to provide it as fuel for their functions with help of chloroplast.Phloem is one of the vessels that helps in the transportation of sugar or glucose from leaves to the rest of the plant body including roots.In roots, these glucose molecules are converted to ATPs by the process called cellular respiration within the mitochondria.Thus, the correct answer is - veinous transport system.
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what is the optimal ph that this enzyme functions at ?
Why is the asteroid belt between Mars and Jupiter?
Answer:
Main Asteroid Belt
Explanation:
It is known as The main astroid Belt
>>>Hope this helps :)
An organism is able to maintain biological balance through a system of feedback and other control ____________ .
Answer: Not positive but I'm pretty sure its Homeostasis
Explanation:
Which of the following statements could not be supported or rejected by a
scientific experiment?
A) The first living cell on Earth came from outer space
B) College students think football is more fun to watch than baseball.
C) Grass is green because it contains chlorophyll
Answer:
A
Explanation:
B can be supported with surveying people,
C can be supported by inspecting Grass under a microscope
Statement (A), The first living cell on earth came from outer space and was not supported or rejected by scientific experiments.
Scientific experiment:
Scientific experiments are performed by scientists to study various studies. The first statement that the first living cell on earth came from outer space was cannot be answered. Because according to some studies it was found that the first living organism came from the earth only.
Some studies found that the first living organism came outside earth. The first statement was not supported or rejected by scientists.
The second statement college students think football is more fun to watch than basketball was performed by using some surveys. The grass is green because it contains chlorophyll is also supported by scientists.
Therefore, statement (A) The first living cell on earth came from outer space and was not supported or rejected by scientific experiments.
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Three students attempt to define what a circle is. Can you match the teacher's comments to the definitions?
This question is incomplete, the complete part of the question containing the students definition and teacher's comment is:
Ruby's definiton: A 3-dimensional shape whose boundary consists of all points equidistant from a fixed point (the center).
Shriya's definition: The set of all points in a 2D plane such that for every point in the set there is exactly one other point in the set that is d (call it diameter) units away.
Abhishek's definition: The set of all points in a plane that are the same distance (radius) away from some given point (center).
Teacher's comments:
Are you thinking of a sphere?
You are correct. Nicely done!
This is incorrect. For example, your definition also allows for the following shape, which is just part of a circle.
THE ANSWERS ARE:
Ruby's definiton: Are you thinking of a sphere?
Shriya's definition: This is incorrect. For example, your definition also allows for the following shape, which is just part of a circle.
Abhishek's definition: You are correct. Nicely done!
Explanation:
A circle is a two-dimensional round plane shape (2D shape) whose boundary line called the circumference has several points that are of the same distance (radius) from the centre point of the shape.
Based on this definition of a circle, the answers given by each students will now be reviewed.
1). Ruby's definiton: This definition is wrong because a circle is not a 3D shape. The definition is describing more of a SPHERE, which is a 3D round shape in a space. Hence, the teachers comment will appropriately be; Are you thinking of a sphere?
2.) Shriya's definition: This definition is wrong because it is not describing a circle, rather it is describing a part of a circle (diameter). Hence, the teachers comment appropriate for this answer is: This is incorrect. For example, your definition also allows for the following shape, which is just part of a circle
3). Abhishek's definition: This definition correctly describes a circle, hence, the teacher's comment will be: You are correct. Nicely done!
Answer:
Definition of a line segment
Ruby's definition: Two points, call them end points, and all of the other points in a straight line between them.
Wunderbar! Well done.
Shriya's definition: A line between two points.
Your definition is kind of correct, but it lacks mathematical precision.
Abhishek's definition: All of the points equidistant from some point
Were you thinking of a circle or perhaps a sphere?
Explanation:
In each example, the blosphere is Interacting with another subsystem of Earth. Identify the other subsystem.
Marine life adds
carbon dioxide to
ocean water during
respiration
Plants on land
release oxygen
during photosynthesis.
Bacteria living
underground convert
ammonia to nitrates.
The waste from
livestock adds
nitrogen to the soil.
The answers are:
Atmosphere: Plants on land release oxygen during photosynthesis.
Geosphere: Bacteria living underground convert ammonia to nitrates. The waste from livestock adds nitrogen to the soil.
Hydrosphere: Marine life adds carbon dioxide to ocean water during respiration
Explanation:
Living beings including animals, plants, and bacteria are part of the biosphere of Earth; additionally, these interact with other systems of Earth such as the atmosphere, geosphere, or hydrosphere. In the case of the atmosphere, which refers to the gases above the surface of Earth, this has an interaction with living beings due to the exchange of gases between both systems. An example of this is plants because they take carbon dioxide from the atmosphere and release oxygen as part of photosynthesis.
On the other hand, the geosphere comprises soil, rocks, minerals, and in general, all that composes the solid non-living parts of Earth. Additionally, there is an interaction between the geosphere and biosphere can occur due to the exchange of substances as it occurs in the case of bacteria converting ammonia to nitrates or in the case of livestock releasing nitrogen.
Finally, the hydrosphere includes all bodies of water such as rivers, oceans, or lakes. Also, there is an interaction between this and living organisms through the exchange of substances, which includes marine life adding carbon dioxide to oceans.
Answer: The answers are:
Atmosphere: Plants on land release oxygen during photosynthesis.
Geosphere: Bacteria living underground convert ammonia to nitrates. And The waste from livestock adds nitrogen to the soil.
Hydrosphere: Marine life adds carbon dioxide to ocean water during respiration
Explanation: I just took the test
Which of the following is an open
circuit?
A. An open circuit is a closed loop for electrons
to follow.
B. An open circuit has an incomplete path for
electrons to follow.
C. An open circuit allows electrons to flow.
D. An open circuit is when a circuit is "on".
Answer:
B
Explanation:
Open circuit means it is not complete so electricity cannot pass through all the wires
*simple terms
Which of the following is an example of the letter "o" in a SOAP note?
The blood pressure is 160/90 mm Hg
Will order prescription refill for blood pressure medication
The patient complains of high blood pressure
The patient should return in 2 weeks
That which is an example of the letter "o" in a SOAP note is this: The patient complains of high blood pressure.
What is the meaning of the letter O?In an objective report, the letter O stands for objective observations that the caregiver makes with respect to the patient. For instance, when the caregiver observes that the patient has a blood pressure reading that seems quite high, then they are making observations.
The O stands for both the observations being made and the objectivity they come with.
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When a person is sprinting the person's muscle cells will begin using anaerobic respiration in addition to keeping the mitochondria respiring aerobically as much as the oxygen supply will allow.
What benefits do muscle cells gain from anaerobic respiration in this situation?
A. The mitochondria can use the oxygen generated as a waste product during lactic acid fermentation to increase their output of ATP
B. When pyruvate is transformed into lactic acid, four more ATP molecules are produced that can power muscle movement while NAD is regenerated
C. For every glucose molecule that enters glycolysis, the cell generates, without oxygen, two ATP molecules that can keep the muscles moving.
D. Adding electrons from NADH to pyruvate regenerates NAD, so that glycolysis can continue, and produces lactic acid a waste product that can diffuse out of the cell.
Answer:
Adding electrons from NADH to pyruvate regenerates NAD, so that glycolysis can continue, and produces lactic acid a waste product that can diffuse out of the cell.
For every glucose molecule that enters glycolysis, the cell generates, without oxygen, two ATP molecules that can keep the muscles moving.
Generally,Glycolysis, takes place in the cytosol of cells with or without oxygen.Therefore it continuous mechanism should be in place during anaerobic respiration for supply of 2ATPs from the Net of 4 ATPs when pyruvate is formed, to ensure sustenance of energy.
Therefore,in this athlete, it is imperative to ensure continuous mechanisms of Glycolysis by constant availability of Co-enzyme NAD+ which must be reduced so that electrons can be available for the substrate phosphorylation steps for generation of pyruvate and ATPs.
Thus as the lactic acid is formed from the pyruvate,it is easily removed from the body as wastes, instead of retaining by the muscles cells. The lack of oxygen ensure supply of of 2ATPs for sustaining the athletes in the anaerobic condition.
In high-elevation forests in Pennsylvania, ecologists have
noticed a serious decline in certain tree species. Some scientists
propose that increased soil acidity might be the cause. What's this
phenomenon?
Answer:
Explanation:
Acid rain , which is caused by SO 2 from combination mixed with atmosphere water vapor
The phenomenon that causes the soil acidity to increase could be the leaching of soil nutrients or acid rain.
What is acid rain?The term, acid rain has to do with the fact that certain gases are able to combine with water in the atmosphere to form acids thereby reducing the pH of precipitation.
Hence, the phenomenon that causes the soil acidity to increase could be the leaching of soil nutrients or acid rain.
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How has the earth changed over time?
Answer
La historia de la Tierra no ha sido una evolución gradual desde que nació hace más de 4.500 millones de años, como una bola incandescente, hasta el actual planeta azul lleno de una vida compleja y diversa.
5. Unsaturated fats that are liquids are called:
Answer:
Unsaturated fat are usually called oils.
Answer:
oils
Explanation:
Proteins accomplish many cellular tasks such as facilitating chemical reactions, providing structure, and carrying information from one cell to another. How a protein chain coils up and folds determines its three-dimensional shape. Its shape will, in turn, determine how it interacts with other molecules and thus performs its function in the cell.
Answer:
True.
Explanation:
Protein is a very versatile molecule and extremely important for the efficient functioning of the organism. However, proteins can only perform their functions through chains that wind and fold to form three-dimensional structures. these three-dimensional structures are the active form of the protein because they build the active site that will allow the substrate needed for body functions to fit and be catalyzed as needed.
In other words, the protein needs to be in its three-dimensional form for the construction of the active site to take place.
PLEASE ANSWER ASAP IM TIMED
The independant variable is the amount of fertilizer.
The dependant variable is the growth rate.
Constants: would be the amount of fertilizer and the amoun tof water used.
Control group: would be for example would be if there was a separate experiment
hope this helps :)
the layer of gases that surround earth is called
Answer:
Greenhouse gasses
Which of the following types of membrane is associated with the skin?
A. Peritoneum
B. Synovial
C. Serous
D. Cutaneous
Answer:
the answer is D. Cutaneous
Explanation:
The cutaneous (ku-ta'ne-us) membrane is your skin. Its superficial epidermis is composed of a stratified squamous keratinizing epithelium. The underlying dermis is mostly dense (fibrous) connective tissue. Unlike the other epithelial membranes, the cutaneous membrane is exposed to air and is a dry membrane.
The type of membrane that is associated with the skin is cutaneous. Therefore, option (D) is correct.
What is cutaneous membrane?Cutaneous membrane is a type of epithelial membrane that covers and protects the external surface of the body, including the skin, hair, and nails. The other options mentioned are different types of membranes found in the body.
Peritoneum is a serous membrane that lines the abdominal cavity and covers the abdominal organs. Synovial membrane is a connective tissue membrane that lines the cavities of freely movable joints. Serous membrane is a type of epithelial membrane that lines the closed body cavities and covers the organs within those cavities.
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According to the mantle plume theory what causes hot spots?
Answer:
According to the mantle plume theory, Plumes are proposed to ascend through the mantle and start to incompletely dissolve on arriving at shallow profundities in the asthenosphere by loose melting.
It leads to enormous volumes of volcanic eruption. The plumes hypothesis suggested that this dissolved magma ascends to the surface and emits to shape "hot spot". the plume head liquefies partially on arriving at shallow profundities, a plume is frequently invoked as the reason for the hotspots at particular region, for example, Hawaii or Iceland.
if you dont take care of your body who will...plz give real answers i really need help
Answer:
we don't care our body our body loss hormone and antibiotic so we live a wastage life because we have no energy....
The human mitochondrial genome is a linear chromosome of 16569 base pairs. encodes 37 genes, 13 of which code for polypeptide chains. is inherited in two copies per mitochondrion, one of paternal lineage and the other of maternal lineage. is less susceptible to DNA damage than is the nuclear DNA.
Answer:
The human mitochondrial DNA is inherited by matrilineal inheritance and it is more sensitive to damage than nuclear DNA.
Explanation:
The mitochondrial DNA (mtDNA) is a DNA molecule localized in the mitochondria (i.e., independent from the nucleus). The mtDNA is more prone to suffer mutations than nuclear DNA due to 1-higher damage produced by reactive oxygen species (ROS) and 2- the absence of nuclear DNA repair pathways. The mtDNA is generally inherited from the mother (both in plants and animals), it is for that reason that mitochondrial genes are powerful molecular markers used in phylogeographic studies to trace the evolutionary origin of a given species/population.
Species have adapted to be able to survive in their environments. This is an
example of: *
includes all descendants from a single common ancestor. does not share any common ancestry but represents convergent evolution. includes some but not all descendants from a single common ancestor. All of these options are qualities that define
Answer:
Phylogenetic relationships
1. includes all descendants from a single common ancestor >>> monophyletic group
2. does not share any common ancestry but represents convergent evolution >>> polyphyletic group
3. includes some but not all descendants from a single common ancestor >>> paraphyletic group
Explanation:
A monophyletic taxon is a collection of organisms that have the same most recent common ancestor, thereby including an ancestor and all its descendants. Examples of monophyletic groups are angiosperms, mammals, insects, etc. A paraphyletic group is composed of some (but not all) the descendants of the most recent common ancestor. An example of a paraphyletic group includes fish and lizards. Finally, a polyphyletic taxon is composed of a group of organisms that do not contain the common ancestor of all the members of the group. An example of a polyphyletic group is composed of birds and mammals, (which constitutes a group of warm-blooded animals).
When a substance or large molecule is enclosed by a membrane in a vesicle within the cell, the membrane of the vesicle fuses with the cell membrane and releases the substance out into the cell's surroundings. This is: A exocytosis B endocytosis C facilitated diffusion D osmosis
Answer:
A
Explanation:
The correct answer would be exocytosis.
Exocytosis is a form of active transport in living cells involving the movement of materials from the inner part of the cell to the outside of the cell. The process is said to be active because it involves the expedition of energy in the form of ATP.
During exocytosis, vesicles housing molecules from the inner part of the cell are transported to and fuse with the cell membrane. The vesicles then expel their contents to the outer part of the cell.
Correct option: A
Differentiate between:
2. Silk moth and honey bee
Answer:
Explanation:
silk moth:
the larvae of a silk moth secrete the silk thread which is used to make clothes.
honey bee:
honey bees make and store honey which is a nutritious food.
silk moth:
its silk is used for making clothes
honey bee:
it can be taken as a food or medicine.
:)
What is the independent variable in the experiment conducted to determine the effects of the herbicide ZWD10 on corn growth?
Answer:
herbicide ZWD10
Explanation:
Independent variable in an experiment are defined as the variable that can be changed or controlled as per the requirement of the experiment to determine its effect on the dependent variable.
In the given experiment, herbicide ZWD10 is an independent variable as it's quantity in experiment can be changed or controlled and we are looking for its effect on corn growth which is a dependent variable.
Hence, the correct answer is herbicide ZWD10.