What is an advantage and disadvantage of using 4.5-7.5 pH paper?
Answer:
The correct answer would be:
Advantage: helps in finding the exact ph value with a narrower range.
Disadvantage: You don't know the exact ph value on a regular scale.
Explanation:
The pH paper is a pH paper with a color indicator that helps in determining the pH value precisely between the 4.5 to 7.5 pH range. It is accurate in comparison to other pH papers such as 0-14 paper. One no need to guess the color between the different colors from various color mixtures as it has a more precise color reading that helps in finding accurate pH value in a narrow range.
On a regular scale, it is not as accurate and one can not find the exact value as it provides a narrow range value between 4.5 to 7.5.
Which of these is NOT an interaction between a plant's root and shoot systems?
The roots absorb water from the soll to prevent leaves from drying up.
The phloem transports sugars from the leaves to the root nodules for storage.
Nutrients are absorbed from the soil and moved to the stems.
The stomata open to allow carbon dioxide to enter the leaves.
I
Answer:
The stomata open to allow carbon dioxide to enter the leaves.
Explanation:
Higher plants are made up of two major system parts namely: shoot system and root system. The shoot system constitutes every part of the plant above the ground i.e leaves, fruits, stem etc. while the root system constitutes the part below ground i.e the roots. The shoot system and root system, however, interacts in several ways to ensure that the plant functions optimally. The ways they interact include:
- The roots (root system) absorb water from the soil, which is transported upwards to prevent leaves (shoot system) from drying up.
- The phloem, which is a conducting tissue, transports sugars (product of photosynthesis) from the leaves (shoot system) to the root nodules (root system) for storage.
- Nutrients are absorbed from the soil by the roots (root system) and moved to the stems (shoot system).
Note that, although it is true that "stomata in the leaves open to allow carbon dioxide to enter the leaves", there is no connection between the shoot and root system.
Answer:
the first choice is D) The stomanta open to allow carbon dioxide to enter the leaves.
Explanation:
thank you for working so hard.
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Type a summary of the phases of water and how a substance changes from one to the other.
Answer:
There are three phases of water that include solid water, liquid water and gas water. Water in solid phase has definite shape and size and molecules are closely packed for example: ice, water in liquid phase or liquid water phase, molecules are close together but can move as per the shape of container, for example: juice; and gas water phase is the phase in which molecules are far from each other.
Same as matter, the phases of water also changes as per the temperature and pressure of the ecosystem changes. When temperature increases, Solid water changes to liquid water and the process called melting and liquid water convert into gas water and the process called vaporization. When temperature decreases, liquid water convert into solid water with the process freezing and gas water convert into liquid water through condensation.
8. Why are some microbes called pathogens?
Answer:
Microbes that cause disease are called pathogen.
(: A pathogen is a micro-organism that has the potential to cause disease
The ecological efficiency at each trophic level of a particular ecosystem is 20%. If the green plants of the ecosystem capture 100 units of energy, about ____ units of energy will be available to support herbivores and about ____ units of energy will be available to support carnivores
Answer:
1. 20 units
2. 4 units
Explanation:
In an ecosystem, energy is transferred from one organism occupying a trophic level to another as they feed on one another. The amount of energy that is being transferred as the chain progresses is called ECOLOGICAL EFFICIENCY. According to this question, the ecological efficiency at each trophic level of the ecosystem is 20%. This means that about 20% of energy units will be transferred to the next trophic level.
If the green plants of the ecosystem capture 100 units of energy, the amount of energy that will be available to support herbivores (plant eaters) is: 20% × 100units i.e. 20/100 × 100 = 20 units.
Also, the amount of energy that will be available to support carnivores subsequently will be 20% of 20 units i.e. 20/100 × 20 = 4 units.
Which process is an example of a physical change
Answer: A
Explanation: it would be A because carrots being cut into pieces and bing mixed into a salad isn’t changing the carrot into something else, it’s just changing the appearance of the carrot and putting it in a salad.
Sex cells divide to produce ___________________(sperm or egg).
Answer:
Egg
Explanation:
I think it a true answer
Answer:
Sperm in males and eggs in females.
Explanation:
Sex cells divide to produce both the sperm in males, eggs in females.
3. Which statement best describes why Beryllium (Be), Magnesium (Mg), and Calcium (Ca) will exhibit similar
chemical properties?
A. The elements have the same number of neutrons in the nucleus.
B. The total number of electrons present in the elements are the same.
c. The total number of protons and neutrons in the elements are the same.
D. The elements have the same number of valence electrons in the outermost shell.
D. The elements have the same number of valence electrons in the outermost shell.
they are all in group 2 , alkali earth metals , so have 2 electrons in their outer shell :)
PLEASE HELPPPP!!!! 20 POINTS
Answer:
1. d.
2. f.
3. b.
4. j.
5. l.
6. a.
7. k.
8. e.
9. i.
10. c.
11. g.
12. h.
Essay
Choose one item from the following list. Research the topic and then list at least five different system interactions for that topic.
Acid rain
Amazon deforestation
Drought
Flooding
Gulf of Mexico oil spill
Hurricane Katrina
Salt water intrusion
Thermal islands
Tsunami
Wind farm development
Yellowstone fires
Yucatan meteor
Hair color such as brown, black, or red is an example of a
Answer:
Explanation:
B | Bb
Bb| bb
that is the table or chart of how you get your hair color. it's an example of genetics (genes from your parents)
Describe the structure and make up of DNA
Answer:
DNA structure DNA is made up of molecules called nucleotides. Each nucleotide contains a phosphate group, a sugar group and a nitrogen base. The four types of nitrogen bases are adenine (A), thymine (T), guanine (G) and cytosine (C).
Explanation:
In your own words how would you define a prokaryotic cell versus a eukaryotic cell?
Answer:
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Explanation:
The main difference between these two types of organisms is that eukaryotic cells have a membrane-bound nucleus,while prokaryotic cell do not. On the other hand, prokaryotic have no membrane-bound organelles. Another important difference is the structure of DNA
why are some molecules polar and others non polar
Answer:
Polarity and Non-polarity of molecules depend upon the electronegativity. The theory of electronegativity lies in entire inorganic chemistry. The more electronegative an atom, the more it seeks electrons. If one atom is more electronegative than others, it can form an ionic bond or a polar covalent bond.
Explanation:
Guys pls help me!!!!!!!!!
Answer:
2. Cellular respiration.
it protect the internal organs and supports our body when we sit
Answer:
what is the question of this not understand
How does the temperature change throughout the cycle of a massive star?
Answer:
I believe that this temperature increases like alot
Expansion- requires alot of heat and combustion, making the star hotter as it grows. unless it collapses on itself..
Name three examples of solids?
Name three examples of liquids?
Name three examples of gases?
solids: rock, glass, coin
gas: hydrogen, oxygen, CO
3.)Why do the coal beds form a pattern only on the map of Pangea?
Which statement is true?
(A) diploid cells contain two sets of chromosomes l.
(B) haploid cells contain chromosomes from each parent.
(C) haploid cells are attached to diploid cells with spindle fibers.
(D) diploid cells contain half the original of chromosomes.
Answer:
A) diploid cells contain two sets of chromosomes
only plutonium and botulism toxin are more deadly than what
Answer:
As of 2003, there has yet to be a single human death officially attributed to plutonium exposure. Naturally-occurring radium is about 200 times more radiotoxic than plutonium, and some organic toxins like Botulism toxin are billions of times more toxic than plutonium.
Drag each tile to the correct box. Not all tiles will be used. Simplify the expression by arranging the steps in sequence, based on the order of operations. ↓ ↓ ↓
Answer:
(1/6)30x+(1/6)24-(1/7)63-(1/7)7x
(1/6)(30x)+(1/6)(24)-(1/7)(63)-(1/7)(-7x)
5x+4-9-x
5x+x+4-9
I hope this helps
Answer:
(1/6)30x+(1/6)24-(1/7)63-(1/7)7x
(1/6)(30x)+(1/6)(24)-(1/7)(63)-(1/7)(-7x)
5x+4-9-x
5x+x+4-9
Explanation:
(10 points) What did meteorites bring to primitive Earth?
a
bacteria
b
viruses
c
primitive cells
d
inorganic materials
Answer:
C. Primitive Cells
Explanation:
I hope u get it right and a good grade
A dinosaur has 40 chromosome pairs. What is its diploid number of chromosomes?
80
40
20
0
What differentiates passive transport from active transport?
A. Proteins have a role in passive transport.
B. Molecules move down a concentration gradient during passive transport.
C. Passive transport involves molecules moving across the cell membrane.
D. ATP is needed for passive transport to occur.
Answer:b
Explanation:
What is the diffrence between genotype and phenotype.....
I look like a RAT ;-;
Answer:
A genotype refers to the genetic characteristics of an organism. A phenotype refers to the physical characteristics.
Explanation:
How are the dark reactions dependent on the light reactions
Which factor is included in watershed conservation?
A. protecting different kinds of wildlife
B. removing vegetation whenever possible
C. preventing damage to crops from precipitation
D. relocating ecosystems away from polluted areas
Answer:
Its C
Explanation:
.......................
Aphids are insects that feed on plant sap. Some ant species feed on the waste produced by aphids. The ants get food and the aphids get protection from other insects. The relationship between the aphids and the ants is an example of _____.
commensalism
parasitism
mutualism
Answer:
C) mutualism
Explanation:
Answer:
c:) mutualism
Explanation:
What role does cellular respiration play in the atmosphere?
Answer:
Explanation:
It removes H2O from the atmosphere during acetyl CoA formation. It releases H2O to the atmosphere during the citric acid cycle.
