Answer:
B) There have been five mass extinction events, with the earliest occurring at 450 million years ago.
E) The environment was changing faster than the species were adapted at the times points labeled by the yellow triangles, resulting in a loss of species.
Explanation:
Oil pollution in the ocean is mostly caused by
HELP ASAP
Which of the following is an example of homeostasis?
Q. During a time of high stress, Justin's heart races, his muscles tense, and he feels
sweat dripping down his forehead.
R. Sick with the flu, Alison's body temperature rises to fever levels.
S. Boris doesn't drink very much water one day. To compensate his kidneys remove less
fluid from his blood, and produce less urine than normal.
T. As Grace races up the ten flights of stairs to her apartment, the muscle cells in her
legs produce excess lactic acid, causing a burning sensation in her legs.
Answer:
The correct answer is Boris doesn't drink very much water one day. To compensate, his kidneys remove less fluid from his blood and produce less urine than normal
Hope this helps :)
Explanation:
Choose the option that best matches the description given.
the study of the frequency, distribution, cause, and control of disorders in populations:
Answer:
Epidemiology
Explanation:
I just looked up the definition of epidemiology and the definition was the question, word for word. So like trust me, it's accurate.
Anyways, I hope this helps.
1. the north polar constellation can be seen in the southern hemisphere.
true or false
2. the south polar constellation can be seen in the northern hemisphere.
true or false
I believe they are both false><
1. the north polar constellation can be seen in the southern hemisphere.
"As viewed from the North Pole, all fully visible constellations north of the celestial equator are circumpolar, and likewise for constellations south of the celestial equator as viewed from the South Pole."
2. the south polar constellation can be seen in the northern hemisphere.
"The southern constellations Carina, Centaurus, and Crux are found circling the south celestial pole and can be seen from southern latitudes at any time of year while remaining invisible for observers in most northern locations."
Hope it helps
why are minerals important for our body? describe the 2 groups of minerals
Minerals are needed for the proper composition of body fluids, including blood, and for the proper composition of tissues, bone, teeth, muscles and nerves. Minerals also play a significant role in maintaining healthy nerve function, the regulation of muscle tone, and supporting a healthy cardiovascular system. There are two kinds of minerals: macrominerals and trace minerals.
Explanation:
.
what seven elements have the appearance and properties of a metal but behave like the non-metal in certain situations?
Answer:
i. boron
ii. silicon
iii. germanium
iv. arsenic
v. antimony
vi. tellurium
vii. polonium
Explanation:
Elements that have appearance and properties of a metal but behave like non-metal in certain conditions are called semi-metals or metalloids. On the periodic table, they are found between metals and non-metals. Examples are astatine, polonium, tellurium, antimony, arsenic, germanium, silicon, boron.
Some of their properties that make them look like metals are:
i. They exist as solids at room temperature.
ii. They are shiny.
iii. They are ductile.
Some of their properties that make them look like non-metals are:
i. They are brittle.
ii. Not very good conductor of electricity compared to metals.
The seven elements have the appearance and properties of metal but behave like non-metal in certain situations.
I. boron
ii. silicon
iii. germanium
iv. arsenic
v. antimony
vi. tellurium
vii. polonium
Elements which have look and residences of a steel however behave like non-steel in sure situations are referred to as semi-metals or metalloids. On the periodic table, they're determined among metals and non-metals. Examples are astatine, polonium, tellurium, antimony,arsenic, germanium, silicon, and boron.
Some in their residences that cause them to seem like metals are:
i. They exist as solids at room temperature.
ii. They are shiny.
iii. They are ductile.
Some in their residences that cause them to seem like non-metals are:
i. They are brittle.
ii. Not an excellent conductor of strength in comparison to metals.
What are metals?
Metals are opaque, lustrous factors that might be the right conductors of warmth and electricity. Most metals are malleable and ductile and are, in general, denser than the opposite elemental substances.
Thus it is clear that the above answers are well explained.
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I’ll mark u as brainliest!
Answer:
39 purple stemmed plants
39 green stemmed plants
Explanation:
You'll end up with half and half! :)
which best describes the concept of natural selection?
A. an organism will always mutate to survive
B. The fittest organisms are selected for
C. Nature selects the organisms with the most Mutations
D. mutations make organisms more fit
Answer:
D.
Explanation:
Natural selection is the way that organisms adapt through adaptations to better survive and pass on the special genes which enable the offspring to survive. Saying an organism will always mutate to survive is wrong, as natural selection implies that not all organisms survive. With natural selection, nothing is "selected", so B and C are not correct. However, mutations DO make organisms "more fit" to survive their environments, so D is the answer.
Answer: The fittest Organisms are selected for
Explanation: Just did the test :)
In the United States, there has been an increase in the number of people infected by mosquito spread diseases that were previously found only in countries
south of the United States. Scientists want to investigate the cause of the increase in mosquito-bome diseases. Scientists have predicted that the mosquitos
carrying disease have moved further north as global temperatures have increased. Which information would be most useful to their investigation?
O A. Meteorologists' annual temperatures of all the major cities in the US for the last ten years.
O B. Population data from the CDC that ranges over several years for mosquitoes that spread disease.
o
C. A report from the Center for Disease Control (CDC) of mosquito spread diseases and their symptoms.
OD. A collection of test results for different vaccines used to prevent mosquito carriab diseases.
Answer:
b
Explanation:
If I have 14 guanine and 37 thymine, how many adenine will I have?
If I have 14 guanine and 37 thymine, then 37 adenine bases will be present in the individual.
What is base pairing?Base pairing is the process by which nitrogenous bases in DNA molecules bind to each other through hydrogen bonds to form the characteristic double-stranded structure of DNA.
Adenine (A) is always associated with thymine (T), and cytosine (C) is always associated with guanine (G).
As a result, knowing the number of guanine and thymine bases in a DNA sequence allows us to calculate the number of adenine and cytosine bases.
We know there are 37 adenine bases because adenine always pairs with thymine and you have 14 guanine bases and 37 thymine bases.
This is because the number of A bases in a double-stranded DNA molecule will always equal the number of T bases, and the number of G bases will always equal the number of C bases.
Thus, there will be 37 adenines.
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How a terrestrial reptile will regulate body temperature if it is placed in a habitat that is extremely dry with the temperature of 55C
If you do not know the answer than do not answer. You don’t have to answer all of the questions just answer the ones you know. Will give brainliest if you help.
Answer:
a,f,d,i,c
Explanation:
6
Which two particles would be attracted to each other?
Oo oo
electrons and neutrons
electrons and protons
protons and neutrons
all particles are attracted to each other
Answer:
Electrons and Protons are two particles would be attracted to each other.
Which scientist devised tests that helped confirm that bacteria and other microorganisms cause a variety of diseases?
Robert Koch
Anton van Leeuwenhoek
Louis Pasteur
Alexander Fleming
Answer:
A. Robert Koch
Explanation:
I got a 100 on the pre-test (Edgen2021)
Robert Koch made tests that helped confirm that bacteria and other microorganisms cause a variety of diseases.
Who was Robert Koch?Robert Koch was a scientist that work to identify many pathogenic microorganisms (e.g., bacteria and fungi).
Nowadays, Robert Koch is considered the father of modern bacteriology. Robert Koch identified many pathogenic microorganisms including Mycobacterium tuberculosis (tuberculosis) and Vibrio cholera (cholera).In conclusion, Robert Koch made tests that helped confirm that bacteria and other microorganisms cause a variety of diseases.
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Where would you be likely to find the alpine tundra biome?
a. the Russian north woods
b. central plains of the United States
c. the southern most tip of Australia
d. a mountain range in Europe
Answer:
The answer is D.
Explanation:
D- A mountain range in Europe
Alpine tundra is found on high-latitude landmasses, above the Arctic Circle like Russia, Greenland, Iceland, and Scandinavia. Thus option A is correct
What is alpine tundra?Alpine tundra is a type of ecosystem that occurs at high elevations characterized by colder temperatures, long winters, and growing seasons are shorter with no trees.
The Russian north woods have Treeless tundra and distinctive vegetation known as Beringian woodland, high mountain range, and long winter. so option A is correct.
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help i’ll give you brainilest
what makes a good scientific argument?
Answer:
the claim (or the explanation), the evidence (or the observations), and the rationale (or the reasoning). Reasoning that explains the evidence and why it supports the claim.
Explanation:
Hope this helps!
Answer:
Breaking their Theory and throwing liquid chemicals at their shirt and they get fired
Explanation:
_____ is essential for all life within
an ecosystem.
A. Trophic
B. Water cycle
C. Predation
What is the hallmark of a chemical change?
what is the main difference between the plant cell and Animal cell
Answer:
PLANT CELLS HAVE A CELL WALL
Explanation:
THANK ME LATER
Answer:
Heyaa!! My Name Is Pinky and i'm here to inform you that you're answer is...
Explanation:
!!!! there are a few differences between plant and animal cells BUT!! one major difference is their structure, animals are enclosed by a cell membrane, but plant cells have a cell membrane and a cell wall to give them a more solid form another major difference is that plant cells have chloroplasts for photosynthesis whereas animal cells do not because they do not undergo photosynthesis !!!!
Have an amazing day!!!
~Pinky~
indicate FOUR
reasons why you think having it may enhance responsible living in your environment
Answer:
Can you please elaborate on ur question??
: d
What is accomplished during meiosis 1
Answer: However, Meiosis I begins with one diploid cell and ends with two haploid cells, halving the number of chromosomes in each cell.
Explanation:
Check each of the following statements that are true with regard to Griffith’s experiments.a. ______ Griffith discovered transformation in bacteria.b. ______ Mice injected with smooth bacteria quickly became sick and died.c. ______ Encapsulated bacteria can become "naked" bacteria.d. ______ Bacteria that do not have capsules tend to be harmless.e. ______ Smooth bacteria develop a capsule only after exposure to the DNA of encapsulated (rough) bacteria.f. ______ Griffith’s transforming factor was the protein in the capsule.g. ______ Transformation allows bacteria to acquire new genes.h. ______ Enzymes that destroyed DNA would prevent transformation.
Answer:
The correct answer is - a, d, e, h, i.
Explanation:
Frederick Griffith performed an experiment of 1928 known as Griffith's experiment and showed that bacteria can get genetic material through a process called transformation.
The following statements are true:
Griffith found out transformation in bacteria.
Bacteria that are naked or smooth tend to be harmless.
Enzymes treated bacteria that destroyed DNA would prevent transformation.
Transformation allows bacteria to acquire new genes.
Naked or smooth bacteria can make them self encapsulated only after exposure to the DNA of encapsulated bacteria.
1.La energía es la capacidad de un cuerpo para producir trabajo.
2.La energía se clasifica solamente en renovables.
3.Las ondas se pueden propagar en un medio o un espacio vacío.
4. Las ondas se pueden clasificar en longitudinales y transversales.
5. La energía cinética es aquella que se encuentra en movimiento.
6. El núcleo de la Tierra está formado
por metales, principalmente hierro y níquel, y en menor
cantidad por azufre y oxígeno.
7. La corteza terrestre está compuesta por rocas
8. La contaminación se puede
definir como la presencia o acumulación de sustancias en el medio ambiente
que afectan negativamente el entorno.
9. Los elementos de la tabla periódica se clasifican de acuerdo con sus propiedades y características
similares.
II. Escoge
1. Son fuentes de energías renovables:
2. Son fuentes de energías no renovables:
3. Partes de las ondas:
15. La ciencia que estudia los seres vivos es:
16. En la biotecnología se incluyen las áreas de:
17. Consiste en la liberación de sustancias químicas a la atmósfera que alteran su composición.
18. Se debe a la presencia de desechos en el agua. La contaminación de mares, ríos y lagos se produce por
las actividades del ser humano.
19. Se debe a la acción humana (los residuos y la basura arrojada en cualquier superficie terrestre).
20. Cuando el contaminante es una sustancia química que procede normalmente de los usos industriales.
21. Surge con la emisión de fluidos a elevadascontaminación.
22. La actividad humana produce mucho ruido, y los altos decibelios en un determinado lugar por encima de sus niveles naturales marcan la contaminacion.
Answer:
La actividad humana produce mucho ruido, y los altos decibelios en un determinó do lugar por encima de sus niveles naturales marcan la contaminación.
Explanation:
Creo que es la respuesta
difference between antigens and antibodies?
Answer:
Antigens are molecules capable of stimulating an immune response. Each antigen has distinct surface features, or epitopes, resulting in specific responses. Antibodies (immunoglobins) are Y-shaped proteins produced by B cells of the immune system in response to exposure to antigens.
Explanation:
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hopes this helps
Protein Synthesis and Codons Practice
DNA → T T C A A T G G T C T A G G G
RNA →
Amino Acids →
Answer:
RNA AAGUUACCAGAUCCC
Explanation:
Remember A codes for U
C for G
G for C
T for A
The amino acids will be for every codon (every three letters)
I don’t have a codon chart to translate at the moment but I hope this helps:)
Question 5
How do increases in the carrying capacity of Earth for people affect the carrying capacity of Earth for other species?
Select one:
It increases for most species.
It decreases for all species.
It decreases for most species.
It increases for all species.
Answer:
It increases for most species.
What is the original biosphere, sometimes referred to as Blosphere 1?
O
a greenhouse on the Mir space station
the planet Earth
a sealed environment in Arizona
the human body
Answer:
The correct answer is - the planet Earth.
Explanation:
Biosphere 2 is the second self-sufficient biosphere that is a research center of America that is built to study, teach and research the purpose of the earth and its biosphere. It is termed biosphere 2 because the original biosphere is the primary biosphere that self-sufficient which is called biosphere 1.
Biosphere 1 is changed altered so much since it formed in various manners including the hydrosphere, atmosphere and different matter cycles.
Space exploration can lead to money going to U.S.
businesses and universities.
What are two things NASA might hire U.S. businesses and universities to do?
A. Teach people to read
B. Improve athletic teams
C. Build complex equipment
D. Research new ideas
Answer:
build complex equipment andddd research new ideas
Explanation:
hope this helps yall!!!
Answer:
C & D
Explanation:
Ap3x
In DNA, a sequence of three bases is a code for the placement
of a certain amino acid in a protein chain. The table shows some
amino acids with their abbreviations and DNA codes.
Which amino acid chain would be produced by the DNA base
sequence below?
C-A-A-G - T- T - A-A-A-T - T-A