When a species consisting of a single large population slowly evolves over many generations into a new species, this an example of:.
Which of the following is least necessary for plate tectonics?
O A solid core inside the planet
O A semi-solid mantle
Convection currents in the mantle
O A crust divided into plates
Answer:
Convection currents in the mantle
Explanation:
Convection in the mantle is the same as convection in a pot of water on a stove. Convection currents within Earth's mantle form as material near the core heats up. As the core heats the bottom layer of mantle material, particles move more rapidly, decreasing its density and causing it to rise.
Effects
Convection also plays a role in the movement of deep ocean waters and contributes to oceanic currents. Inside Earth, the convection of mantle material is thought to cause the movement of the overriding crustal plates, resulting in events such as earthquakes and volcanic eruptions.
Speed
Estimates of the speed with which Earth's mantle moves range from 1 to 20 cm/year with an average of about 5 cm/year in the case of plate motions to as much as 50 cm/year in hotspots such as the Hawaiian Islands (see Plates, Plumes, And Paradigms (2005) edited by Gillian R.
Direction
Convection currents observed in water rise to the surface and then spread out in both direction. Convection currents in the mantle are thought to operate in the same matter as convection currents in water. ... This shows that the convections currents move outward both right and left after the current reaches the surface.
Heat source
The primary sources of thermal energy for mantle convection are three: (1) internal heating due to the decay of the radioactive isotopes of uranium, thorium, and potassium; (2) the long-term secular cooling of the earth; and (3) heat from the core.
Answer:
A solid core inside the planet.
Explanation:
What molecules are needed for cellular respiration to happen?.
Krypton-85 has a half-life of 10.76 years. How much of a sample of 60 g is left after 53.8
years?
please. help. me. ^^ 50 points to whoever gets it and shows work. and you get brainlest
Answer:
1.875 grams
Explanation:
formula :
N (t) = N0 * (1/2) ^ t/t 1/2
remaining amt = initial amt * (1/2) ^ time/ half life
remaining amt = 60 * (1/2) ^ 53.8/10.76
remaining amt = 60 * (1/2) ^ 5
remaining amt = 1.875
What helps speed up a chemical reaction?
lipid
inhibitor
enzyme
carbohydrate
PLZ YOU WILL GET 10 POINTS
Answer:
the answer will be enzyme
Explanation:
catalysts speed up chemical reactions
The generic types of competitive strategies include:.
What vascular tissue is an internal adaptation that allows plants to transport water and minerals from the roots to the leaves?.
Answer:
xylem
Explanation:
Xylem, plant vascular tissue that conveys water and dissolved minerals from the roots to the rest of the plant and also provides physical support.
hope this helps please make this brainliest answer
What is the role of chlorophyll in photosynthesis?
Answer:
it captures the light to be converted to energy to run photosynthesis and make sugars out of h2o and co2
Is this right, please help. I’ll mark as brainliest
Answer:
yes
Explanation:
believe what you believe,so soon will be reached your believes...
Shree Janakalyan Secondary School 63 Galchhi-4, Mastar, Dhading Open Book Examination- 2078 Grade : 8 F.M.: 75 Sub. : Com. English P. M.: 30 Attempt all the questions: 1. Rewrite the following sentences selecting the correct options from the brackets: a. She is .......... one-eyed woman. (a, an, the, nothing) b. He met me ........ the way to market. (in, on at) Mina, do this work... ...( herself, himself, yourself) d. The earth ............ round the sun.(move, will move, moves) He never drinks alcohol........ .? ( doesn't he, does he, don't he) C. e.
Answer:
a. a
b. on
c. yourself
d. moves
e. does he
With respect to the lobes of the brain, the frontal lobe is involved in ________ and the occipital lobe is the final destination for ________.
True or False: In plants, xylem cells, root hair cells, and phloem cells are unspecialized cells.
Answer:
true
Explanation:
In plants, xylem cells, root hair cells, and phloem cells are unspecialized cells. The statement is true.
what are roles of xylem and phloem ?Plants have different tissues to transport water, nutrients and minerals. Xylem involve in the transportation of water and mineral salts from the roots up to different parts of the plant, where as phloem transports sucrose and amino acids.
Xylem is composed of elongated dead cells, continuous vessels (tubes), xylem vessel contain no cytoplasm, impermeable to water, contain woody material called lignin.
Phloem composed of living cells, cytoplasm, transports sucrose and amino acids up and down the plant by a process called translocation.
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The enzymes that are used to replicate a virus are synthesized by
the virus capsid.
the virus capsule.
the receptor.
prions.
the host cell.
Answer:
i believe its option D. The host cell.
Hope this answered your question!
Transporter proteins bind their solutes in a hydrophilic pocket and then undergo a(n) change that switches the exposure of the pocket from one side of the membrane to the other.
Answer:
You can answer any of these options and you are going to get it right: conformational, structural, morphological, topological, conformation, structure, shape, or conformational shape.
Explanation:
Some strains of Mycobacterium tuberculosis are resistant to so many antibiotics that it has become known as a(n)
Answer:
[tex]\huge\boxed{\sf Multidrug\ resistant}[/tex]
Explanation:
Antibiotics:
"Medicines used against bacteria are called antibiotics."
Example:
Rifampin, isoniazid.
Mycobacterium Tuberculosis is a bacteria.
However, some of its strains are resistant to antibiotics and thus is classified as multidrug resistant (MDR resistant)
[tex]\rule[225]{225}{2}[/tex]
Hope this helped!
~AH1807Cancer (uncontrolled mitosis) is caused by mutations in:
a. Proteins b. Nucleic Acids c. Lipids
d. Carbohydrates
Cancer (uncontrolled mitosis) is caused by mutations in nucleic acids.
What is Mutation?This is defined as a change in a DNA sequence which is often caused by the following:
Mistakes from DNA copying Ionizing radiationChemicalsDNA is an example of a nucleic acid which is why the option B is the most appropriate choice.
Read more about Mutation here https://brainly.com/question/14438201
please the answers of this science activity
Answer:
I can't see the questions.
Explanation:
Recently Zika virus has been in the news, with many cases in Central and South America and increasing numbers of cases in the southern United States. Five years ago this virus was essentially unheard of in these areas. This is an example of
This is an example of an emerging infectious disease. These diseases can spread rapidly to generate pandemics.
What is Emerging Infectious Disease?An Emerging Infectious Disease can be defined as a disease capable of spreading by using a suitable vector (carrier).
Emerging Infectious Diseases may have the potential to generate pandemic situations.
Some examples of Emerging Infectious Diseases include human immunodeficiency virus (HIV) infection and SARS.
Learn more about Emerging Infectious Diseases here:
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What does semi-conservative mean in relation to DNA replication?
Answer:
DNA replication of this kind is referred to as being semi-conservative because the original double-stranded molecule has complementary base pairs of nucleotides, and complementary nucleotides used unzipped single-stranded areas as templates. So, this means that no DNA molecule is completely new because half of the pre-existing DNA molecules are always conserved.
Explanation:
Answer:
relating to or being genetic replication in which a double-stranded molecule of nucleic acid separates
Identify the phases in cells 2, 12, 29, 32, and 41 in the image below.
2
12
Telophase
29
32
41
Interphase
Answer:
1) Prophase: chromatin into chromosomes, the nuclear envelope break down, chromosomes attach to spindle fibres by their centromeres 2) Metaphase: chromosomes line up along the metaphase plate (centre of the cell) 3) Anaphase: sister chromatids are pulled to opposite poles of the cell 4) Telophase: nuclear
(◠‿・)—☆
What is the temperature scale
Please do not copy in Goôgle
Answer:
These are not necessary and are used for taste and convenience. This scale was historically born when there was no standard for calibrating thermometers. The Fahrenheit scale used the temperature of the coldest known at the time to zero.
Explanation:
Hope it helps you<3GAWAIN 1 Panuto: Piliin at isulat sa patlang ang letra ng tamang sagot sa mga sumusunod na pahayag.
1. Ito ay karaniwang ginagamit sa kalye kaya't madalas na tinatawag na salitang kalye o kanto A. Pambansa B. Pampanitikan C. Balbal D. Kolokyal
2. Ako'y tila isang nakadipang kurus. Anong tayutay ang ginamit sa pahayag? A. pagtutulad B. personipikasyon C. pang-uyam D. pagwawangis
3. Sa pagsulat ng wakas ng kuwento, mahalagang maipaunawa sa mambabasa ang A. galing ng manunulat C katangian ng tauhan B. tagpuan ng kuwento D. kinahinatnan ng tauhan
4. Kailangan nating maghigpit ng sinturon sa panahon ngayon. Ano ang kahulugan ng mga salitang may salungguhit? A. magtiis B. maghirap C. magdasal D. magtipid
5. Ang makulay na pagpapahayag na ginagamitan ng mga salitang nagmumungkahi ay tinatawag na: A kataga B. idyoma C. tayutay D. talinghaga
Answer:
There are four students working on a project in math class. Miguel has completed 1/8 of the project, Gina has completed 13% of the project, Jatziry has completed 0.10 of the project, and Keva has completed 1/9 of the project. Make a list of the students in order from least to greatest by the amount of the project they have completed.
Explanation:
I don't have points
A large number of dopamine-releasing neurons are found in the __________. A. Brainstem B. Hindbrain C. Midbrain D. Forebrain Please select the best answer from the choices provided A B C D.
The substantia nigra (SN) and ventral tegmental region have the most midbrain dopaminergic neurons (VTA). Therefore, option (C) is correct.
Where is dopamine most active in the brain?Dopamine (DA) neurons in the middle brain are absolutely necessary for the control of fundamental aspects of the brain, including the processing of rewards, voluntary movement, and working memory. The substantia nigra (SN) and the ventral tegmental region have the biggest populations of dopaminergic neurons in the midbrain. These two nuclei are located in close proximity to one another (VTA).
As a component of the brain's reward system, dopamine is most prominently responsible for assisting humans in experiencing pleasure. Dopamine can be released in response to a number of different stimuli, including sexual activity, retail therapy, or even the aroma of freshly baked cookies.
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The complex external covering composed of two or three layers found on the majority of bacteria is termed the cell Multiple choice question.
explain how matter such as water, oxygen, and carbon dioxide cycles in an ecosystem?
help!
Answer:
Plants take in energy from the sun, carbon dioxide and water and produce carbohydrates and oxygen.
Explanation:
what does each phases of mitosis do in 2 short sentences each
Answer:
it can not be in 2 sentece
1) Prophase: chromatin into chromosomes, the nuclear envelope break down, chromosomes attach to spindle fibres by their centromeres 2) Metaphase: chromosomes line up along the metaphase plate (centre of the cell) 3) Anaphase: sister chromatids are pulled to opposite poles of the cell 4) Telophase: nuclear envelope .
You’re planning on a career in forensic science—but what kind exactly? You have many options! Choose one of the following unique careers in forensic science and take a closer look. For the special field you pick, research online and write about the following points:
Degrees you would need in order to work in your special field (one to two sentences).
What someone in your chosen specialty does (one to two sentences).
A real-life example of how your specialty was used to solve a case (at least three sentences).
A brief summary detailing what you think the two biggest challenges would be with your specialty and what you feel would be most rewarding or enjoyable about it (three to five sentences).
Possible Fields to Choose From:
Fingerprint analyst
Forensic psychologist
Forensic ballistics expert
Polygraph examiner
Forensic pathologist
Blood spatter analyst
Forensic toxicologist
Digital forensics
Forensic accounting
Forensic odontologist
Wildlife forensics
Forensic entomologist
Forensic engineering
Forensic DNA analyst
Answer:
This is the exact question I have and I am having a hard time picking just one to go into.
Explanation:
Which organelles appear ONLY in plant cells? Explain. (Question 2)
Molly wants to take a ploture of a bluebird in a free across the street. What type of fons should Molly use?
macro
Telephoto
wide
fisheye
Answer:
wide
Explanation:
its wide buddy so here you go
Mendel was a careful researcher who studied the inheritance of certain traits in garden peas. What are some of the research practices Mendel used?
Choose all that apply.
A. He crossed true-breeding pea plants.
B. He allowed eggs to be fertilized only by self-pollination.
0
C. He analyzed his data mathematically.
D. He controlled variables by studying one or two traits at a time.
Answer:
the answer is b I got it right on my test B