Answer: D. biomes are determined by climate zones
Explanation:
QUESTION 2
Which of the following substances is not carried in the mem or in the phloem?
Sugar
Water
mu o
Carbon dioxide as
Dissolved minerals
Answer:
Carbon dioxide
Explanation:
Xylem and phloem are the two conducting tissues of a vascular plants. They are referred to as vascular bundles. Xylem and phloem are responsible for conducting certain substances from one part of the plant to another.
The xylem is responsible for conducting WATER AND DISSOLVED MINERALS from the root of the plants to other parts e.g leaves, stem, flowers etc. while the phloem conducts sugar (product of photosynthesis) e.g glucose from the leaves of the plant to other parts including the stem, root etc.
According to this question, xylem or phloem does not conduct or carry gaseous substances like carbon dioxide (CO2).
Why do people sneeze and cough?
I will give brainly if you explain why.
The sneezing is release of air that helps the body to get rid of irritants in our nose and throat, like allergens, dirt, and dust.
Coughing is by forcing the air out of the lungs with high pressure, to clear the throat of these foreign particles.
What is extinction ?
Answer:
The term extinction's dictionary meaning, is the process of when a species, plant, or any other term for animal family, goes extinct. In more, basic terms, it means when a certain species of animal dies out completely.
This can happen due to several reasons, some being massive natural disasters. Others die out due to an unknown predator entering an ecosystem in which it doesn't belong, therefore disbalancing it.
Examples of extinct animals are Dinosaurs, but their exact reason for going extinct is unkown, there are only theories.
There are also many animals in danger of going extinct, for example Bees.
Hope this information could be of use to you!
Transmission electron microscopes that use high-energy electrons accelerated over a range from 40.0 to 100 kV are employed in many applications including the study of biological samples (like a virus) and nanoscience research and development (alloy particles and carbon nanotubes, for example). What would be the spatial limitation (in pm) for this range of electrons
Answer:
Explanation:
Using the concept of de Broglie wavelength under relativistic conditions to determine the spatial limits for electron range.
de Broglie wave-length [tex]\lambda = \dfrac{h}{p}[/tex]
where;
h = plank's constant
p = momentum of particle which is expressed as:
[tex]p = \dfrac{\sqrt{k^2+2kmc^2}}{c}[/tex]
replacing the expression for (p) into [tex]\lambda = \dfrac{h}{p}[/tex], we have:
[tex]\lambda = \dfrac{h}{\dfrac{\sqrt{k^2 +2kmc^2}}{c}}[/tex]
[tex]\lambda = \dfrac{hc}{\sqrt{k^2+2kmc^2}} --- (1)[/tex]
here;
c = velocity of light = 3 × 10⁸ m/s
h = 4.13 × 10⁻¹⁵ eV.s
i.e.
hc = (4.13 × 10⁻¹⁵ eV.s)(3 × 10⁸ m/s)
hc = 1240 eV.m
The electron's rest energy (mc²) = 0.511 × 10⁶ eV
For the elctrons;
the minimum accelerated voltage = 40kV
the maximum accelerated voltage = 100 kV
the minimum K.E of the electron K = eΔV
K = e × 40 kV
K = 40 KeV
K = 40 × 10³ eV
From equation (1);
[tex]\lambda = \dfrac{hc}{\sqrt{k^2 +2kmc^2}}[/tex]
[tex]\lambda = \dfrac{1240 \ eV.nm}{\sqrt{(40 \times 10^3 \ eV)^2 +2(40 \times 10^3 \ eV)(0.511 \times 10^6 \ eV})}[/tex]
[tex]\lambda = \dfrac{1240 \ eV.nm}{\sqrt{((1600000000) +(80000\times 511000))eV}}[/tex]
[tex]\lambda = \dfrac{1240 \ eV.nm}{\sqrt{((1600000000) +(40880000000)eV}}[/tex]
[tex]\lambda = \dfrac{1240 \ eV.nm}{\sqrt{(42480000000) \ eV}}[/tex]
[tex]\lambda = \dfrac{1240 \ eV.nm}{206106.769 \ eV}}[/tex]
[tex]\lambda = 0.062 \ nm[/tex]
[tex]\mathbf{\lambda = 6.20 \ pm}[/tex]
The maximum K.E of the electron K = eΔV
K = e × 10 kV
K = 10 KeV
K = 100 × 10³ eV
From equation (1);
[tex]\lambda = \dfrac{hc}{\sqrt{k^2 +2kmc^2}}[/tex]
[tex]\lambda = \dfrac{1240 \ eV.nm}{\sqrt{(100 \times 10^3 \ eV)^2 +2(100 \times 10^3 \ eV)(0.511 \times 10^6 \ eV})}[/tex]
[tex]\lambda = 0.037 \ nm[/tex]
[tex]\mathbf{\lambda = 3.70 \ pm}[/tex]
As a result, the spatial limits for the electron's range span from 6.02 pm to 3.70 pm.
Why is it important to know the proper ways on how to sustain Earth's resources?
⚠Nonsense = Report
Answer:
Sustainability is important for many reasons including: Environmental Quality – In order to have healthy communities, we need clean air, natural resources, and a nontoxic environment. ... We need clean air, natural resources, and a nontoxic environment.
Environmental designers design structures to match the environment.
Please select the best answer from the choices provided
от
OF
Answer:
True
Explanation:
Environmental designers are professionals who try to limit the effects of the building process on the surrounding environment when designing programs, plans, policies, buildings, commercial products, etc. They are capable of simultaneously providing ecological sustainability and pleasant human spaces. For that purpose, environmental designers can build structures by using environmentally friendly materials. Some of the most important areas of research that include the job of an environmental designer include ecology, sustainability, architecture, urban planning, construction, environmental impact, environmental psychology, etc.
Answer:
true
Explanation:
edge 2021
la energía fotovoltaica emite gases de efecto invernadero?
Answer:
La energía solar fotovoltaica no emite gases tóxicos ni contaminantes, no produce residuos ni tampoco contamina el agua, por lo que su utilización para generar electricidad contribuye de forma efectiva para reducir el calentamiento global.
What does the strength of friction
depend on?
A. The direction of the forces.
B. The types of surfaces and how hard the
mbjects are being pushed.
C. The color of surfaces and how hard they push.
D. Only how hard the objects are being pushed.
Answer:
the direction of force.
Consider the following scenario: In a muddy lake environment, some fish have brown scales. Most fish, however, have silver scales. Predators have a harder time seeing the fish with brown scales. Which term best describes the brown scales?
Answer:
Camouflauge
Explanation:
The given condition in which predators have a more challenging time seeing the fish with brown scales is known as camouflage.
What is camouflage?Plants and animals use camouflage to blend into their surroundings.Both predators and prey use camouflage to avoid detection.Prey may change their skin color or disguise themselves to avoid detection by other predators during this phenomenon. Predators like the Stone Flounder, a flatfish, lay motionless on the ocean floor, buried beneath the sand, waiting for prey.Why do animals use camouflage?hide from their pursuers.They are making it difficult for their prey to flee and sneak upon them.Coloration and markings are used to blend into their surroundings.Thus, we can conclude that the brown scale fish use camouflage, resulting in a more challenging time for predators to see the brown scale fish.
You can learn more about camouflage here,
https://brainly.com/question/15925070.
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Q-6 List two differences between SER and RER.
Q- 7 What is the chemical composition of cell wall in plants and fungi respectively?
Q- 8 List two differences between SER and RER.
Q- 9 What are genes? What is their function?
6.Smooth Endoplasmic Reticulum(SER)gives rise to spherososomes/oleosomes,It is peripheral and may be connected to plasmalemma.
Rough Endoplasmic Reticulum(RER) It helps in the formation of lysomes,It is internal and connected with the nuclear envelop.
7.Plant cell walls are composed of cellulose,while fungi cell walls are composed of chitin.
8.answer on question number 6.
9.A gene is basic physical and fundamental unit of heredity.Some genes act as instructions to make molecules called proteins.How ever,many genes do not code for proteins...
It might help you!!!
what can a wave be decribed as
Answer:
what wave hehe
Explanation:
sorry I don't know
the function of mitochondria is
hope this helps
Answer:
Mitochondria are membrane-bound cell organelles (mitochondrion, singular) that generate most of the chemical energy needed to power the cell's biochemical reactions. Chemical energy produced by the mitochondria is stored in a small molecule called adenosine triphosphate
The ability of a person to roll his tongue is due to a dominant allele T. A woman who can roll her tongue is married to a man who cannot . Two of their four children have the ability to roll their tongues , and two do not . What are the parents genotypes ?
Mother: tt father Tt
mother Tt Father:tt
mother: tT Father Tt
mother:TT father:tt
Answer:
second option
Explanation:
brainly keeps marking my explanation as inappropriate?; had to delete it entirely
The portion of the Earth and atmosphere where life exists is referred to as the ecosystem.
A True
B False
Answer:
true
Explanation:
backed up by the levels of organization
What is postharvest handling?
Explanation:
In agriculture, postharvest handling is the stage of crop production immediately following harvest, including cooling, cleaning, sorting and packing. The instant a crop is removed from the ground, or separated from its parent plant, it begins to deteriorate.
Can somebody help me?
choose the true statement(s) concerning the eukaryotic glycocalyx
Explanation:
eukaryotic glycocalyx is present in prokaryotic cells, eukaryotic cells can also have glycocalyces especially single celled eukaryotic organisms.
EASY 50 POINTS!!!!!!!! PLEAAASEEE ANSWER AS SOO AS POSSIABLE
Answer:
1 is a
2 is c
3 is d
4 is e
5 is b
Answer:
A is Population. B Gene. C Species D Heterozygous. E Allele
why a pond is considered a community and also ecosystem
Answer:
A pond is an area filled with water, either natural or artificial, that is smaller than a lake. Ponds can be created by a wide variety of natural process (. on floodplains as cut off river channels, by glacial processes, by Pearl and
formation, in coastal dune systems, by beavers) or they can simply be isolated depressions (such as a kettle hole, vernal pool, prairie pothole or
Answer:
The pond contains both. It contains things like water, rocks, mud, sand, available oxygen, temperature, pH, etc. It also contains living items like bacteria, fish, frogs, etc. That's an ecosystem.
Explanation:
the hawaiian islands were formed by volcanic activity, but they are far from any plate boundaries. explain how this could occur.
Answer:
Hotspots from under the ground
Explanation:
There are three different situations where an volcano can form. A divergent boundary, where two tectonic plates move away from each other, subduction boundary, where one of the tectonic plates moves under the other, and a hotspot. Scientists are not completely sure how hotspots form.
Is this right I really need help plzzzzzzzzz
what are tips for taking mcas and passing it?
Which kind of rock is most likely to contain a trilobite fossil?
1) sedimentary
2) igneous
3) metamorphic
4) plutonic
Explain how it formed. Thank you.
Answer:
Sandstone
Sandstone contains fossils of creatures such as trilobites, brachiopods, crustaceans, bryozoans and plants. Remains of land animals like mastodons and dinosaurs are much more likely to be found in sandstone.
Explanation:
thank me later
Lucas places 20 kg samples of each substance by the same heat source all samples are at the same initial temperature which sumvstance will have the greatest temperature after some period of time
Answer:
Metallic structure with black colour body.
Explanation:
The substance has metallic structure and black colour body will have greatest temperature among other substances because metallic structure and black colour of body heat up very quickly. Metals have free electrons which make it the best conductor of electricity and heat while on the other hand, black colour is a good absorbent which absorb heat very quickly so that's why we can say that metallic solids are the substance that have the greatest temperature.
Answer:
copper
Explanation:
it copper because it have less specific heat (j/kgoc)
What are the possible gametes (sperms) that would be produced from a male carrying balanced translocation between chromosomes 11 and 22, if it occurs in 2:2 Segregation: adjacent segregation
2 ) Fertilization
Fertilization is the process in which gametes (an egg and sperm) fuse to form a zygote. The egg and sperm are haploid, which means they each contain one set of chromosomes; upon fertilization, they will combine their genetic material to form a zygote that is diploid, having two sets of chromosomes. A zygote that has more than two sets of chromosomes will not be viable; therefore, to ensure that the offspring has only two sets of chromosomes, only one sperm must fuse with one egg.
In mammals, the egg is protected by a layer of extracellular matrix consisting mainly of glycoproteins called the zona pellucida. When a sperm binds to the zona pellucida, a series of biochemical events, called the acrosomal reaction, take place. In placental mammals, the acrosome contains digestive enzymes that initiate the degradation of the glycoprotein matrix protecting the egg and allowing the sperm plasma membrane to fuse with the egg plasma membrane. The fusion of these two membranes creates an opening through which the sperm nucleus is transferred into the ovum. Fusion between the oocyte plasma membrane and sperm follows and allows the sperm nucleus, centriole, and flagellum, but not the mitochondria, to enter the oocyte. The nuclear membranes of the egg and sperm break down and the two haploid genomes condense to form a diploid genome. This process ultimately leads to the formation of a diploid cell called a zygote. The zygote divides to form a blastocyst and, upon entering the uterus, implants in the endometrium, beginning pregnancy.
image
Process of fertilization: (a) Fertilization is the process in which sperm and egg fuse to form a zygote. (b) Acrosomal reactions help the sperm degrade the glycoprotein matrix protecting the egg and allow the sperm to transfer its nucleus.
To ensure that no more than one sperm fertilizes the egg, once the acrosomal reactions take place at one location of the egg membrane, the egg releases proteins in other locations to prevent other sperm from fusing with the egg. If this mechanism fails, multiple sperm can fuse with the egg, resulting in polyspermy. The resulting embryo is not genetically viable and dies within a few days.
Cleavage, the Blastula Stage, and Gastrulation
A zygote undergoes rapid cell divisions (cleavage) to form a spherical ball of cells: the blastula; this will further develop into a blastocyst.
period between two periods of mitosis
the process involving the division of the nucleus in a
reproductive cell
Answer:
The nuclear division that forms haploid cells, which is called meiosis, is related to mitosis. As you have learned, mitosis is the part of a cell reproduction cycle that results in identical daughter nuclei that are also genetically identical to the original parent nucleus.
Explanation:
The nuclear division that forms haploid cells, which is called meiosis, is related to mitosis. As you have learned, mitosis is the part of a cell reproduction cycle that results in identical daughter nuclei that are also genetically identical to the original parent nucleus.
Answer:
In general, mitosis (division of the nucleus) is preceded by the S stage of interphase (during which the DNA is replicated) and is often followed by telophase and cytokinesis; which divides the cytoplasm, organelles and cell membrane of one cell into two new cells containing roughly equal shares of these cellular components.
Explanation:
The different stages of Mitosis all together define the mitotic (M) phase of an animal cell cycle—the division of the mother cell into two genetically identical daughter cells.Meiosis results in four haploid daughter cells by undergoing one round of DNA replication followed by two divisions. Homologous chromosomes are separated in the first division.
You have a beautiful garden at home. On Sunday, you start budding your rose plant to make few more samples of rose plants to plant in the garden. Can you categorize how this scenario could be represented by classes and instances?
Answer:
It is possible to make this categorization as follows:
Roses = Class
Rose samples = instances
Explanation:
In a very direct and objective way, we can state that classes are models that define how a given situation will be handled, which methods will be used to manage it and the objectives that will be established in that situation. Instances, on the other hand, are elements taken from the interior of classes, which contain factors that make them up. Based on this, we can determine that, in the case of the above question, roses are classes and rose samples are instances.
Sakura tested the pH of several solutions. Which substance are acidic?
Answer: cola-flavored soda: 2.6
cranberry juice: 2.9
pickle juice: 5.5
Explanation:
The substances given are:
cola-flavored soda: 2.6
cranberry juice: 2.9
dish soap: 7.3
pickle juice: 5.5
seawater: 8.0
lye soap: 13.0
Based on a pH scale, an acidic solution is one that has a pH that is below 7, a solution is neutral if the pH is 7 while a basic solution has a pH of above 7.
Therefore, the acidic substance will be:
cola-flavored soda: 2.6
cranberry juice: 2.9
pickle juice: 5.5
Who likes fishing here?
10 POINTSSSSSSSSS!!!!!!!!!!!!!!!!!!
Answer:
13. A group of Roaches moving in a group
14. Stepping on the Roaches to kill them
Answer: First image shows 3 groups with 14 Roaches in each group moving towards an human.
Second image shows the human stepping on the middle group of roaches.
Explanation: Roaches are nasty. Get an exterminator, ya nasty.
