Answer:
c. Sucrose and glucose
Explanation:
The paramecium is a large, single-celled microbes, surrounded by a plasma membrane. Simple diffusion occurs in cells across plasma membranes, as a form of passive transport. In diffusion, solutes move from regions of high concentration to regions of low concentration across the plasma membrane.
Here, the internal environment has higher concentrations of sucrose and glucose, but lower concentrations of fructose, thus the solutes will move along their concentration gradient, to where the concentrations are lower. In order for the fructose molecules to move out of the cell, the molecules have to move against their concentration gradient - a process requiring energy known as active transport.
For what type of study does the United States Census Bureau assist scientists by completing research?
A) Demographic
B) Fertility
C) Oceanographic
D) Environmental
If scientists wanted to date the oldest rocks on Earth's surface, why wouldn't
they use rocks formed at the Mid-Ocean ridges ?
Answer:
Explanation:
This is because rocks formed at the mid ocean ridges are young rocks i.e the mid ridges is use to date young rocks. Rocks farther from the mid ridges are older than rocks near the mid ridges and this can also be as a result of the oceanic crust near the mid ridge are younger than the oceanic crust far away from the mid ridge.
In 1898 Friedrich Loeffler and Paul Frosch found evidence that the cause of the highly contagious hoof-and-mouth disease in livestock was a microscopic infectious particle. It was discovered that this particle cannot reproduce on its own. Which of these is most likely responsible for causing hoof-and-mouth disease in livestock?
Answer:
a virus, because it requires a host cell to reproduce
Explanation:
a bacterium, because it is contagious a fungus, because it infects livestock a protist, because it is microscopic a virus, because it requires a host cell to reproduceThe correct answer would be a virus because a virus is the only microbe that cannot reproduce on its own without a host. A virus utilizes the genetic mechanism of its host to reproduce either lytically or lysogenically.
In lytic cycle, the virus utilizes the genome system of the host to produce more viruses that eventually leave or lyses the host to become independent viral particles, killing the host in the process.
In lysogenic cycle, the virus inserts its genome into that of the host and uses the host's replication machinery to replicate its genome. The virus then waits for the defense mechanism of the host to become weakened before multiplying and lysing the host.
How would our world be different if humans did not discover how to use yeast thousands of years ago?
Answer:
what is yeast? a microscopic fungus consisting of single oval cells that reproduce by budding, and are capable of converting sugar into alcohol and carbon dioxide.
Explanation:
ok so it would be different because we wouldnt have alchool and carbon dioxide and sugar would be useless
Answer:
Once upon a time there were no farms. People ate fruit off the vine and killed animals as they ran. They roasted things when it suited them but just as often ate them raw. The world was like this for thousands of years, a place of arrows and nuts where everything that was necessary could be found. One might imagine many reasons for giving up on those old, superficially idyllic, ways. Perhaps it was hunger, that ultimate mother of invention, or maybe it was just invention itself, unmotivated by need.
What is equilibrium?
Answer:In a chemical reaction, chemical equilibrium is the state in which both reactants and products are present in concentrations which have no further tendency to change with time, so that there is no observable change in the properties of the system.
Explanation:
Answer:
Equilibrium means when the concentrations of reactants and products are in an unchanging ratio. Another way of saying this is that a system is in equilibrium when the forward and reverse reactions occur at equal rates.
Explanation:
i hope this helps
So, if this is one strand of DNA, what will the other strand look like?
A T G C C G A T A
Answer:
T A C G G C T A T
Explanation:
In deoxyribonucleic acid (DNA) there are 4 nitrogen bases that pair like:
• Adenine (A) with Thymine (T)
• Cytosine (C) with Guanine (G)
We are given the strand:
A T G C C G A T A
For each A, write a T. For a T, write an A.
For every C, write a G. For a C, write a G.
The corresponding strand is:
T A C G G C T A T
At the end of mitosis two identical cells are produced.
true
false
Answer:
True
Explanation:
At the end of mitosis, one cell produces two genetically identical daughter cells.
What type of macromolecule is starch?
Answer:polysaccharide
Explanation:
A starch macromolecule is a polysaccharide composed of thousands of glucose units. glucose molecules can be added to starch by a condensation reaction.
Water is able to dissolve more substances than any other liquid. This is an example of which property?
O Density
O Adhesion/Cohesion
O Universal Solvent
Answer:
Universal Solvent
Explanation:
Water is known as a universal solvent as it is capable to dissolve more substances than any other liquid.
This is how molecules of water are attracted to other types of molecules.
A true universal solvent doesn't exist but water is the closest to it, as its polar property allows water to dissolve substances.
Pick any 2 organ systems in the human body and explain how they work together
in order to keep the body in homeostasis. Make sure to name both systems,
explain each system's main functions, and describe how they work together to
keep an important part of the body in balance.
Answer:If you were a single-celled organism and you lived in a nutrient-rich place, staying alive would be pretty straightforward. For instance, if you were an amoeba living in a pond, you could absorb nutrients straight from your environment. The oxygen you would need for metabolism could diffuse in across your cell membrane, and carbon dioxide and other wastes could diffuse out. When the time came to reproduce, you could just divide yourself in two!
However, odds are you are not an amoeba—given that you're using Khan Academy right now—and things aren’t quite so simple for big, many-celled organisms like human beings. Your complex body has over 30 trillion cells, and most of those cells aren’t in direct contact with the external environment.^1
1
start superscript, 1, end superscript A cell deep inside your body—in one of your bones, say, or in your liver—can’t get the nutrients or oxygen it needs directly from the environment.
How, then, does the body nourish its cells and keep itself running? Let's take a closer look at how the organization of your amazing body makes this possible.
Explanation:
Please help me with this. Will Mark Brainliest
Which of these belongs to a trophic level with the most energy?
Berries
Grasshopper
Mice
Owl
Answer:
berries
Explanation:
yw
Answer:
a berries
Explanation:
brainliest
All life on earth depends on _____ through the ecosystem
Answer:
Energy
Explanation:
Which of the following molecules can be identifield as carbohydrate select all that apply
Answer: it would beidk
Explanation: idklol.
Which organelles would a student include when constructing a model of a plant cell that would differentiate it from an animal cell?
A. anaphase
B. Metaphase
C. Telophase
D. Prophase
5. The evidence for evolution by natural selection.
Answer:
air+7=p+s/1.342643
Explanation:
thats all i know
state 2 preventive actions a person could take to reduce the chance of a heart attack
Answer:
Regular Exercise and a Healthy Diet
How are young plants are supported
Answer:
You are a wh0re
Explanation:
The green plant pigment that absorbs sunlight is
OA.
cellulose.
OB. chlorophyll.
C. carbohydrate.
OD. starch.
Answer:
B. Chlorophyll
The others are wrong
A student is examining the liquid mercury inside a thermometer. If the liquid is composed of only mercury atoms, what can the student conclude?
A :the liquid is an impure substance because it is in a liquid state.
The liquid is a pure substance because it is made up of elements
The liquid is an impure substance because it is inside a thermometer.
The liquid is a pure substance because it is made up of mixtures.
Answer:
b
Explanation:
DID IT
Mercury is used in thermometers to estimate temperatures. Liquid mercury composed of Hg atoms is a pure substance that consists of single elements. Thus, option B is correct.
What are pure substances?Pure substances are chemicals that are matter and have been known to have distinct chemical properties because of their constant and definite composition. The physical methods of separation can not be used to separate the pure substances.
The liquid mercury is a pure substance as it has been composed of only one type of elemental atom Hg. All of its composition has been carrying the Hg atoms uniformly that possess and exhibit the same chemical and physical characteristics.
Therefore, option B. the liquid mercury is a pure substance as it is made of the same type of element.
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answer quick!
Which statement best describes embryonic stem cells?
Embryonic stem cells are capable of self-renewal only.
Embryonic stem cells are capable of differentiation only.
Embryonic stem cells are capable of self-renewal and limited differentiation.
O Embryonic stem cells are capable of self-renewal and unlimited differentiation.
Answer:
Embryonic stem cells are capable of self-renewal and limited differentiation.
Explanation:
Answer:
✔ Somatic
stem cells are capable of
✔ self-renewal
, not differentiation.
✔ Embryonic
stem cells are capable of self-renewal and
✔ differentiation
.
✔ Amniotic fluid
stem cells are capable of
✔ self-renewal
and limited differentiation.
Explanation:
Answer True or False.
1. Most plants have three main parts. true
2. A plant's leaves carry water to the roots.
3. Chlorophyll helps plants make food true
4. Roots hold plants in the soil.
5. Stems give off carbon dioxide into the air.
6. Some plants have roots that are branched
7
Root hairs take in oxygen from the air.
Plz help me with this.
Answer: evaporation i believe
what do a grasshopper, a carrot, and a chicken have on common
Answer:
The food chain/food web
Explanation:
Which cell structures are seen in prokaryotic and eukaryotic cells?
nucleus
cell membrane
mitochondria
DNA
ribosomes
cytoplasm
DONE
compare the number of chromosomes in pumpkins to the number of chromosomes in humans.
PLEASE HELP ASAP!
Answer:
Humans: 46 chromosomes (23 pairs)
Pumpkins: 40 chromosomes (20 pairs)
The number of chromosomes in pumpkins to the number of chromosomes in humans is Humans: 46 chromosomes (23 pairs) and Pumpkins: 40 chromosomes (20 pairs)
What is the number of chromosomes in different animals?If a dog has 78 chromosomes in each of his cells, each set of DNA has two sets of chromosomes because dogs are a diploid species so it would be 78/2 and in each cell a dog with 78 chromosomes would have 39 molecules of DNA in each of his cells.
The final products of meiosis in males is four sperm cells and in females it is one ovum and three polar bodies. Thus, the final product of meiosis is four sperm cell in male and one ovum in female with three polar bodies. The main objective of meiosis is to produce gametes, the sperm and eggs, with half of the genetic character of the parent cell.
Meiosis has been defined as the process in which a single cell divides into two identical daughter cells and the process is known as cell division. Meiosis has a type of cell division in sexually reproducing organisms that reduces the number of chromosomes in gametes.
Therefore, The number of chromosomes in pumpkins to the number of chromosomes in humans is Humans: 46 chromosomes (23 pairs) and Pumpkins: 40 chromosomes (20 pairs)
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The alantic ocean grows in size due to a
It has grown in size due to global warming
one different between prokaryotes, and eukaryotes is that prokaryotes do not have.
A: a nucleus,
B: cytoplasm
C: a cell membrane
D: DNA
Answer:
A a nucleus
Explanation:
since prokaryotes have their DNA in the cytoplasm they do not have a nucleus
If an organism has 48 as its diploid number, how many chromosomes will each cell have at the end
of meiosis I?
O 24
O 12
0 48
O 96
Answer: The answer is 96
Explanation:
Which two atoms form a covalent bond?
Answer:
In a covalent bond, the atoms bond by sharing electrons. Covalent bonds usually occur between nonmetals. For example, in water (H2O) each hydrogen (H) and oxygen (O) share a pair of electrons to make a molecule of two hydrogen atoms single bonded to a single oxygen atom.
Explanation: