Answer:
The human heart is a muscular organ which consists of four chambers and is responsible for the pumping of blood across the whole body. The heart possesses a network of blood vessels like arteries, veins and capillaries. Two of the five blood vessels that enter or leave the heart directly are the aorta and the pulmonary artery, And the Aorta is the largest artery, which carries oxygenated blood from the left ventricle of the heart to other parts of the body. In contrast, the pulmonary artery carries deoxygenated blood from the right ventricle of the heart to the lungs with the aim of purification.
Explanation:
Conduct an investigation to provide evidence that living things are
made of cells
Please help this is 7th grade science btw
Answer:
In Late 1600s Anton von Leeuwenhoek develops a more powerful microscope that allows him to see living cells like bacteria.
In Early 1800s Matthias Schleiden and Theodor Schwann conclude that all living organisms are made of cells, and that cells can be produced from other cells.
Explanation:
Early defibrillation is a link in the chain of survival. Why is this important to survival.
Answer:
As it can get rid of any irregular heart rhythms and with irregular heart rhythms, the more time it is present the more damage it can do added on to the fact it may not be as easy to get rid of.
Explanation:
This chart shows characteristics of three different types of waves.
A 3-column table with 1 row titled Three Different Types of Waves. The first column labeled Wave X has entry visible light. The second column labeled Wave Y has entry X-ray. The third column labeled Wave Z has entries ocean wave.
Which statement is best supported by the information in the chart?
Wave X and Wave Y are mechanical waves, and Wave Z is an electromagnetic wave.
Wave X and Wave Y are electromagnetic waves, and Wave Z is a mechanical wave.
Wave X and Wave Z are electromagnetic waves, and Wave Y is a mechanical wave.
Wave X and Wave Z are mechanical waves, and Wave Y is an electromagnetic wave.
Wave X and Wave Y are electromagnetic waves, and Wave Z is a mechanical wave. Thus, option "B" is correct.
What is the difference between electromagnetic wave and Mechanical waves?An electromagnetic wave does not require a material medium for propagation.
Mechanical waves require material medium for their propagation.
Mechanical waves Electromagnetic waves
Ocean water Light waves waves
Sound waves Radiation waves
Earthquake waves X-ray waves
Thus, option "B" is correct.
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Answer:
Wave X and Wave Y are electromagnetic waves, and Wave Z is a mechanical wave
Explanation:
Why are starfish such a problem for commercial fishermen?
Answer:
They occur naturally on reefs throughout the Indo-Pacific region, and when conditions are right, they can reach plague proportions and devastate hard coral communities. Our research has revealed crown-of-thorns starfish are a major cause of coral loss on the Great Barrier Reef, after coral bleaching.
Evolution Review Worksheet
the cenes of an e
m's Metime
fntment an orga
Occurs
Chancesi
U'S ONA
Divergent Evolute
A daeram sheine
der tHect
Gene How
Oreism
e better adspted to their es
Homoloco
and reprodace.
M.
Y_stncture
Natual Cl
do not come
When
Whe.
uaty roml
terent species
1.
When two species (that
break off
14 UL The bats of wings, the flippers el whales and ee
11 Aave t?
structure because theys
n Acciimation
common ancestor.
Adaptation
is a population of squirrels that live in the forest. One day,
Adaptive Radiation
. the iquirreis decide to leave the forest and co live
Analoçou Structun
few miles away,
Bottieneck Effect
Founde ffect
off the coast of Mexico.
Gene Flow
17.
The cichlid fishes of Malawi rapidly changed into
Homologous Structures
species!
s a specialized:
for ei
Natural $
food.
18
There are two populations of wild horses: one that has mostly white horses and one that has mostly
brown horses. One day, a white horse wanders off and decides to join the brown horse population, adding the
white horse gene to the brown horse population
19. -9 Insects and Bats did
both developed
20.
There are tan mice
desert.
whiter
easily seen by snakes
so over time, the tan :
• prevalent because they
and reproduce.
21
Because it is colder during the winter, the bears that live north grow thicker fur to protect them from
the freezing temperatures.
Explanation:
d decides to join the brown horse population, adding the
white horse gene to the brown horse population
19. -9 Insects and Bats did
both developed
20.
There are tan mice
desert.
whiter
easily seen by snakes
so over time, the tan :
• prevalent because they
and reproduce.
21
Because it is colder during the winter, the bears that live north grow thicker fur to protect them from
the freezing temperatures
What is a keystone species? Why are keystone species important to maintaining a balanced ecosystem?
Answer:keystone species are a species that is extremely important to the ecosystem or something. If keystone species go extinct, it could cause a huge problem for the ecosystem
Explanation:
Proteins help the body build new tissue, repair damage cells, and produce energy.
true or false
9) The table shows the minimum pH that some common freshwater organisms can survive in water.
Which organism would be MOST sensitive to acid rain?
A) bass
B) clams
C frogs
D) mayflies
Answer:
Explanation:
The correct answer is option B- Clams
It is very clear how acid rain is affecting our ecosystem. Plants, animals and other living organisms are effected including their habitat.
When acid rain enters soil, it leaches aluminium from soil particles and mixes it with soil. Aluminium level in water intoxicates the water content which is critical for the survival of water animals.
The critical PH level for clams is 6.
Based on their names, you know that the baboons papio annubis and papio cynocephalus do not belong to the same.
Answer:
species
Explanation:
Papi is the genus while the 2nd word is the species
Help me please that will mean a lot to me if y’all help me
D is ans becauseit convert
Explanation:
convert nitrogen gas in the atmosphere to ammonia. Nitrifying bacteria convert ammonia to nitrites or nitrates.
Are chemical compounds that contain carbon and hydrogen atoms called petrochemicals?
Answer:False
Explanation:Fossil fuels are the energy-rich substances
Describe the exchange of co2 and o2 the lungs
Explanation:
Co2 and O2 in the lungs are exchanged when alveoli send oxygen to the capillaries surrounding them to the nearby blood vessels which contain c02, and osmosis occurs where o2 is now in the vessels while co2 is now in the alveoli and therefore the lungs, and then the co2 is expelled out of the lungs.
Why are scientists not able to agree on whether or not viruses are alive?
a. Viruses cannot evolve but can infect living cells.
b. Viruses cannot reproduce inside living cells but can evolve.
c. Viruses cannot infect living cells but can live independently.
d. Viruses cannot live independently but can reproduce inside living cells.
Answer:
A .Viruses cannot evolve but can infect living cells.
Which of these describes a situation where natural selection could lead to evolution?
A. Radiation causes the leaves of sunflowers to curl.
B. Predation removes slower antelope from the herd.
C. Incubation at warmer temperatures produces female turtles.
D. Precipitation at higher rates stimulates the growth of elm trees.
Decomposition of the ozone may lead to an increase in mutations because
Mutations increase due to the decmoposition of the ozone because it can allow the penetration of UV radiations such as UVA, UVB, and UVC to reach Earth. These types of radiations can harm us by causing certain diseases in humans such as skin cancer, eye damage, and of course, mutations.
An increase in the rate of evolution in a population will be affected by which scenario?
A. Sunlight stimulates the growth of ash leaves.
B. Wind blows pollen grains to nearby ash trees.
C. Weevils eat the larger seeds dropped by ash trees.
D. Migrating birds rest in ash trees on their journey south.
You find an organism in the back yard that is growing on an old decaying stump and appears to be nonmotile (doesn't move). It has no leaves and is not green, but is definitely multicellular. What Kingdom does it most likely belong to?
Plantea
Protista
Fungi
Eubacteria
Answer:
eukaryote
Explanation:
it's probably a fungi which is eukaryotic
can someone explain how impulses r transmitted at synapses
Impulses are transmitted through the help of neurotransmitters at the synapses.
What are synapses?Synapses are spaces at the neuronal junctions which are located between the muscle and the nerve cell.
Impulses arriving from a nerve cells usually crosses these spaces to the next nerve or muscles.
The generation of action potentials leads to the release of chemical messengers called the neurotransmitters.
These chemicals diffuse across the synapse (the gap between the two neurons).
The chemicals bind with receptor molecules on the membrane of the second neuron.
Therefore, Impulses are transmitted through the help of neurotransmitters at the synapses.
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Explain the ‘Central Dogma’
Answer:
It's an explanation in molecular biology, of the flow of genetic information provided in a biological system.
How many tentacles does a squid have.
Answer:
2 tentacles but 10 arms
the tentacles are normally the two longer arms.
What are three main disadvantages of genetic modification?
Answer: The nutritional value of foods can be less.
Pathogens adapt to the new genetic profiles.
There can be negative side effects that are unexpected.
Explanation:
Which of the following shows a correct food chain?
A)leaf - ant > anteater
B)leaf anteater - ant
C)anteater → ant -> leaf
D)ant → leaf → anteater
the answer would be A i wasnt paying attention srry
What evidence do scientists have that Earth has been hit by large objects, like asteroids, in the past? Check all that apply.
layer of volcanic ash
layer of burned organic matter
change in average global temperature
mass extinctions
earthquake activity
Answer:
b, d, a
Explanation:
i dont really know these just sound right to me also hi
Answer:
b. c, d on edge
Explanation:
Locally, many citizens have shown concern of the new natural gas pipeline coming through Colquit County. Which of the following justifies their concerns?
Answer:
the followning justifies their concerns: Wheat, Hardworking self laborers, inflation, these things are all a cause.
Explanation:
If you want to get into it deeper look through the laboring physcics.
On land, nitrogen-fixing bacteria convert nitrogen from the atmosphere into ammonia. Other kinds of bacteria then convert the ammonia into nitrates that plants can use. How does this part of the nitrogen cycle on land compare to the process that occurs in the ocean?
A. Plants convert nitrogen into ammonia, which animals convert to nitrates.
B. Plankton, not bacteria, convert nitrogen into ammonia.
C. Plants convert nitrogen directly into nitrates.
D. Plankton, not bacteria, convert ammonia into nitrates.
Answer:During nitrification, ammonia (NH3) is oxidized and converted to nitrite and then to nitrate. This process is carried out by chemosynthetic bacteria (also known as nitrifying bacteria). That is, the energy released during nitrification is used to synthesize organic matter.
2. Denitrification occurs when bacteria in the soil, called denitrifying bacteria, use nitrates and convert them to nitrogen gas. Denitrification ensures that nitrogen is returned to the atmosphere.
3. Atmospheric nitrogen is fixed primarily with the help of bacteria. These bacteria act by forming nodules in the cortical areas of the roots of these plants, where they remove atmospheric nitrogen and convert it to the ammonia (NH3) used by the plants.
Explanation:
Answer: The correct answer is D. Plankton, not bacteria, convert ammonia into nitrates.
Explanation: Confirmed correct.
At which location is the temperature of the ocean floor bedrock most likely highest?
1
A
2
3.
B
C
D
Seafloor bedrock is younger near the ridge and older farther away.
Sana makatulong po NOT LYINGif I have two unicellular organisms, will they have the same genetic code? yes or no
Answer:
I think yes
Explanation:
I NEED THE ANSWER ASAP WILL MARK BRAINLIEST!!!! Hunting and habitat destruction have led to a decline in the cheetah population, and therefore a decrease in genetic variation within the cheetah population. What evolutionary mechanism most likely has contributed to this decrease in the population’s genetic diversity?
a. Gene flow
b. Mutation
c. Genetic drift
d. Recombination
The evolutionary mechanism that most likely has contributed to this decrease in the population’s genetic diversity is genetic drift.
What is genetic drift?Genetic drift is an overall shift of allele distribution in an isolated population, due to random fluctuations in the frequencies of individual alleles of the genes.
Genetic drift is one of the contributing factors of decrease in genetic variation among a population of organisms.
Therefore, the evolutionary mechanism that most likely has contributed to this decrease in the population’s genetic diversity is genetic drift.
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Please help quick. Fill in the blanks
Answer:
Nucleus
Ribosome
mRNA
Protein
Sequence (?)
Functions
Explanation:
What do a burrowing owl, mole rat, European hedgehogs have in common
Answer:
They all have good senses and similar traits.
