Answer:
The earliest time that life forms first appeared on Earth is at least 3.77 billion years ago, possibly as early as 4.28 billion years, or even 4.5 billion years; not long after the oceans formed 4.41 billion years ago, and after the formation of the Earth 4.54 billion years ago.
Explanation:
Describe the main function of the following parts.
1. leaves
4. roots
2. stem
5. flowers
3. veins
6. petals
Answer:
Petal is brightly coloured and scented to attract pollinating insects
Leaf acts as food factory using the energy from sunlight
Roots carry water and nutrients from soil to the plants body and keeps it anchored in the ground
Veins are blood vessels that carries blood towards heart
Stems support for the elevation of leaves,flowers and fruits and also transport fluids between roots and shoots in xylem and phloem
Explanation:
What type of organism is a single cell, that is in warm water of a hot spring ?
a. plant
b. virus
c. animal
d. bacterium
Which of these are considered long-term human-induced environmental changes? Check all that apply.
pollution
human-created mass extinction
eutrophication
non-sustainable harvesting
ozone layer destruction
global warming
Answer:human-created mass extinction and ozone layer destruction.
Explanation:
Final answer:
Long-term human-induced environmental changes include pollution, global warming, ozone layer destruction, non-sustainable harvesting, human-created mass extinction, and eutrophication. These activities lead to lasting impacts such as increased temperatures, sea level rise, loss of biodiversity, and disruption of aquatic ecosystems.
Explanation:
Long-term human-induced environmental changes include a variety of processes that have significant and lasting impacts on our planet's ecosystems. Among these, pollution, which introduces harmful substances into the environment, and ozone layer destruction, caused primarily by chlorofluorocarbons (CFCs), lead to increased UV radiation and affect both human health and ecosystems. Another critical issue is global warming, mainly due to the burning of fossil fuels which raises Earth's temperatures and sea levels, posing threats to biodiversity. The unsustainable harvesting of resources, which leads to overexploitation of ecosystems, and human-created mass extinction, as a result of habitat destruction and overpopulation, are also long-term changes that disrupt the balance of ecosystems. Additionally, eutrophication, which is the nutrient enrichment of water bodies often from agricultural runoff, leads to harmful algal blooms and dead zones that can devastate aquatic life.
How many bronchi do we have?
Answer:
30,000
Explanation:
you welcom hope this helped you guys!
What is thermohaline circulation?
Answer:
Thermohaline circulation is a part of the large-scale ocean circulation that is driven by global density gradients created by surface heat and freshwater fluxes.
Explanation:
A flood that covers and meadow and drowns animals and a late frost that kills young
plants are examples of how ___________ can affect the size of a population.
Answer:
weather
Explanation:
A flood that covers a meadow and drowns animals and a late frost that kills young plants are examples of how ____ can affect the size of a population.
They are all examples of how Weather can affect the size of a population : Weather
Effects of Weather conditionsWeather conditons of an ecosystem plays a vital role in the growth and survival of populations of species in the ecosytem. Harsh or adverse weather conditions such as heavy flooding, and severe drought conditions adversly affects the population of species in a ecosystem.
Hence we can conclude that They are all examples of how Weather can affect the size of a population
Learn more about weather conditions : https://brainly.com/question/17922964
How does replication ensure that cells have complete sets of DNA
Answer:
Explanation:
During replication a new strand of DNA is synthesized when the other strand is a template to guide the process. Every time the order of the bases in preserved so that DNA can be accurately replicated over and over with identical genetic information.
Some cancers are caused by mutations that stop certain proteins from working. The inactivation of what kind of protein could lead to cancer?
A. One that slows down the cell cycle
B. One that acts as a growth-reducing molecule
C. One that responds to growth-promoting molecules
D. One that speeds up the cell cycle
Answer:
D
Explanation:
Since cancer is uncontrolled cell growth, a protein that speeds up cell growth would make the most sense
what occasion transforms the salt plan landscape
Answer:
Salt Flat Landscape Creates the World's Largest Mirror. In Bolivia, the Salar de Uyuni, the world's biggest salt flat, transforms into a natural wonder during late summer rains.
Explanation:
Answer:
i dont know what but i just want 5 points
Explanation:
A scientist is studying an organism under a microscope. The organism is eukaryotic, unicellular, and contains chloroplasts that allow
it to perform photosynthesis.
The organism described above could most likely be classified as a
A. bacterium
OB. protist
OC. plant
OD. fungus
Reset
Submit
Answer:
OB. protist
Explanation:
Protists belong to kingdom protista. These organisms madeup of a single cell and having membrane around the nucleus. Some protists are like fungi, some are like plants and some of them are like animals. The plants like protist such as algae have the ability to make their own food like plants due to the presence of chlorophyll in the process of photosynthesis.
Answer:
Protist
Explanation:
If the high projection is correct, what will need to happen to
ensure the human population has enough food?
O
A. Humans will have to focus more on ideas and services.
O
B. Humans will have to return to hunting and gathering.
O
C. Humans will have to find more efficient ways of growing crops.
To ensure adequate food for a growing human population, we must focus on sustainable food systems and more efficient crop production, increasing the environment's carrying capacity while minimizing environmental impacts.
Explanation:If the high projection of human population is accurate, to ensure there is enough food, humans will have to find more efficient ways of growing crops. With the burgeoning population, it is essential that sustainable food systems are employed to provide healthy diets while minimizing environmental impacts. This involves improving agricultural productivity, reducing waste, and developing technologies for better food production methods. The shift towards high-efficiency agriculture should ideally increase the carrying capacity of our environment, allowing it to support a greater human population sustainably. This tackles the challenges outlined in Cornucopian theory, which relies heavily on human ingenuity to overcome resource limitations. Moreover, as global demand for higher quality food grows, and natural habitats are converted to croplands, strategies to prevent the risk of species extinction and maintain biodiversity must be integral to food production planning.
Earth is made up of four main spheres. The geosphere refers to the rocks, minerals, and natural landforms that make up Earth’s surface. What do you think makes up the hydrosphere? Why is the hydrosphere important to life on Earth?
Answer:
The word hydro refers to water. The hydrosphere consists of all rivers, lakes, oceans, glaciers, and groundwater found on Earth. The hydrosphere is important because water is a basic necessity for living things. Also, aquatic life forms rely on bodies of water for their habitat
Which cells are larger and ontain a nucleus?
o ovo
archaea
prokaryote
eukaryote
virus
Which of the following is not an
effect of meiosis?
Causes more genetic diversity in sexually
A reproductive species.
Rrepuces the number of offspring affected
B by genetic mutations,
Censures the same number and types of
hones
in indi dua
ID due to vardability in individual strengths
et adual
o improves the chances
Answer:
Which of the following is not an effect of meiosis?
Causes more genetic diversity in sexually
Explanation:
Final answer:
Option B, which suggests that meiosis reduces the number of offspring affected by genetic mutations, is not an effect of meiosis. While meiosis increases genetic diversity, it does not inherently reduce the prevalence of mutations in offspring.
Explanation:
The question asks about the effects of meiosis and which of the given options is not an effect of this process.
Meiosis is a type of cell division that reduces the number of chromosomes in the parent cell by half and produces four gamete cells, each with half the number of chromosomes of the original cell. Genetic diversity is one of the key results of meiosis, as it brings together chromosomes from each parent through sexual reproduction. This diversity is achieved through mechanisms like crossing-over, the independent assortment of chromosomes, and random fertilization.
However, option B suggests that meiosis reduces the number of offspring affected by genetic mutations, which is not necessarily true. While meiosis can lead to the creation of new genetic combinations that may impact the prevalence of certain genetic traits, including mutations, this process does not inherently reduce the number of offspring affected by genetic mutations. Mutations may occur during meiosis as well as other stages of life, and their effect on offspring can range from neutral to harmful, or sometimes even beneficial.
Therefore, the option which is not an effect of meiosis is B: "Reduces the number of offspring affected by genetic mutations."
A seed was discovered and, when planted, grew to be a large flowering plant. This organism is a single cell that was isolated from the human body, has no nucleus, and was causing the patient to be ill.
Answer:
- A seed that when planted produces a flowering plant is an angiosperms.
- The single and non-nucleated cell that can make humans sick is a bacteria.
Explanation:
1. Seed is a germinal structure consisting of the embryo of plants called spermatophytes, a division of the embryophyte clade, capable of reproduction by the production of seeds.
Within the plants spermatophytes are found:
Gymnosperms, from which conifers descend.Angiosperms, or plants with flowers.The seeds that spermatophytes produce are embryonic structures of the plants, which have a rigid external cover, that in suitable conditions can hatch to develop as adult plants.
2. Bacteria are unicellular prokaryotic organisms, whose cellular characteristics include being devoid of nuclei, not possessing most organelles, and possessing free circular DNA in their cytoplasm.
These prokaryotic organisms are considered pathogenic, because of their potential ability to produce disease by entering other living organisms. A cell removed from the human body, unique, without a nucleus, and which can make a patient ill is certainly a bacteria.
Answer:
Bacteria
Explanation:
This phylogenic tree is composed based on molecular data (rRNA). What statements can we infer are true about the organisms throughout the tree?
options:
Because the tree is rooted, all branches share a common ancestor.
All organisms have some sort of cellular structure/organization.
All Eukaryotes evolved from Bacteria.
Since the organisms contain RNA, they share the same DNA.
If the organisms contain RNA, the share the same four nitrogen bases.
Answer:
Because the tree is rooted, all branches share a common ancestor.
All organisms have some sort of cellular structure/organization.
If the organisms contain RNA, they share the same four nitrogen bases.
Explanation:
The tree is rooted means that they are sharing common ancestor of all the species which are present in the phylogenetic tree, it shows the evolutionary relationships between the groups of species.
The level of organization is found in an organism that is organized from the small form to the large form such as organelle form cells, cells form tissues, tissues form organs, etc.
If the organisms contain RNA, they share the same four nitrogen bases because RNA contains these 4 nitrogenous bases: Adenine, Cytosine, Uracil, and Guanine.
Answer:
Because the tree is rooted, all branches share a common ancestor.
All organisms have some sort of cellular structure/organization.
If the organisms contain RNA, they share the same four nitrogen bases.
Explanation:
I did the USATestPrep
What effect did the Montreal Protocol have on Earth's ozone? (1 point)
It decreased ozone in the troposphere
It decreased ozone in the stratosphere.
It increased ozone in the stratosphere
It increased ozone in the troposphere
Answer:
increase ozone in the stratosphere
Answer:
It decreased ozone in the stratosphere.
explination:
The Montreal Protocol on Substances that Deplete the Ozone Layer is a global agreement to protect the Earth's ozone layer by phasing out the chemicals that deplete it. This phase-out plan includes both the production and consumption of ozone-depleting substances.
As blood begins to circulate, it leaves the _________ from the left ventricle and goes into the aorta.
A: lungs
B: veins
C: heart
D: brain
As blood begins to circulate, it leaves the heart from the left ventricle and goes into the aorta. The correct option is C.
What is circulatory system?Blood vessels in the circulatory system transport blood away from and towards the heart.
Arteries transport blood away from the heart, while veins transport blood back to the heart.
The cardiovascular system transports oxygen, essential minerals, and hormones to cells while also removing pollutants such as carbon dioxide.
Blood flows from the body into the right atrium, then into the right ventricle, and finally into the pulmonary arteries in the lungs.
After picking up oxygen, blood returns to the heart via the pulmonary veins into the left atrium, then to the left ventricle, and finally to the body's tissues via the aorta.
Thus, the correct option is C.
For more details regarding circulatory system, visit:
https://brainly.com/question/10103458
#SPJ2
I just need 1 and 5 can you help me pleaseee
How might a person be affected if all the microorganisms living in his or her intestines died?
Answer:
Your gut and intestines would not return nutrients to your body therefore it would be very hard to survive for a long time. Basically, you would end up dying sooner or later.
Explanation:
If microbes were not in your body able to kill bacteria and return nutrients then all of the bad bacteria would eventually take control of your whole body and you would end up dying.
Hope this helps.
If all of the microorganisms in the intestine died, proper nutrient absorption and digestion would not occur, resulting in a wide range of digestive issues and other organ damage.
What is the role of microbiota in the body?Microbes in the body, such as those in the intestine, play an important role in maintaining homeostasis by performing a variety of functions. The microbiota living in the intestine facilitate the digestion process and the reabsorption of nutrients to maintain homeostasis by performing a variety of functions. Some of them produce vitamins that the body requires.
These microbes help kill pathogens and maintain a healthy body because proper digestion occurs in their presence, which stimulates a healthy body, brain, cardiac health, and so on. Without them, all of the functions would collapse, and eventually the entire system would be affected.
Therefore, in the absence of these microbes in the intestine, digestion, absorption, etc. will be affected.
Learn more about the microbiota here.
https://brainly.com/question/13987467
#SPJ2
When a battery is attached to an electrical circuit, the electrical energy produced comes from stored
energy.
A. electrical
B. chemical
c. nuclear
D. thermal
Which cell has the highest rate of mitosis
Cells in the bone marrow and gastrointestinal tract typically have the highest rate of mitosis as they constantly need to replenish and replace cells. Examples include enterocytes in the small intestine and cells in the bone marrow producing new blood cells.
Explanation:The cells in our body that have the highest rate of mitosis are typically those in the bone marrow and gastrointestinal tract. These are cells that are constantly replenishing and replacing, which requires a rapid and steady rate of cell division, or mitosis. For instance, cells lining the small intestine, known as enterocytes, divide every 12 to 48 hours, which is incredibly frequent in biological terms. Similarly, the bone marrow, responsible for producing new blood cells, must undergo frequent mitosis to sustain this necessary output.
Learn more about Mitosis here:https://brainly.com/question/31626745
#SPJ6
The cell with the highest rate of mitosis is usually found in the growing tips of plant roots and in the blastula of whitefish. The process of mitosis involves four stages followed by cytokinesis, producing two daughter cells. However, the rate of mitosis changes depending on the needs of the organism.
Explanation:The cell type with the highest rate of mitosis is typically found in the growing tips of plant roots, as well as in the blastula stage of whitefish development. The proportion of cells undergoing mitosis in these regions is high because growth and development are rapid in these areas. Thus, the cell cycle progresses quickly.
Here's how it works: Once a cell has completed the interphase and is ready for cell division, it proceeds through four separate stages of mitosis - prophase, metaphase, anaphase, and telophase. This is followed by the division of the cytoplasm, called cytokinesis, which generates two daughter cells. This process takes place in all normally dividing cells of the body, except for the germ cells that produce eggs and sperm.
The rate of mitosis is closely coordinated with the needs of the organism. Thus, cells in regions of active growth, such as a root tip or a developing embryo, will have a higher rate of mitosis than other cells in the organism.
Learn more about Mitosis here:https://brainly.com/question/9809645
#SPJ6
The process in which a solid changes to a liquid is called
Answer:
melting
Explanation:
the solid melts into a liqiud
Answer: Melting
Explanation:
The solid is heated to become a liquid.
A colony of e coli bacteria asexually reproduce every 20 minutes. If the colony begins with 10 individuals how many individuals will be in the colony after 1 hour?
Answer:
80 E.coli bacteria are produced in 1 hour.
Explanation:
These bacteria reproduce asexually such as binary fission. In binary fission, the body of organisms is divided into two equal parts and each part becomes a new organism. They have the ability to reproduce after every 20 minutes. In the beginning there are 10 E.coli bacteria. So in 20 minutes, 10 individual becomes 20, in another 20 minutes the 20 bacteria becomes 40 and the last 20 minutes the 40 bacteria reproduce and reach the population to 80 bacteria.
What grows in a fertilized cone?
Answer:
Fertilization Follows. During the spring of the female cone's second year, the male and female gametes are ready. The pollen grows a pollen tube, which enters a little hole in the ovule's skin near its basal end, called the micropyle. The tube enters the ovule, and the sperm goes down the tube and into the ovule.
Answer:
The familiar woody cone is the female cone, which produces seeds. The male cones, which produce pollen, are usually herbaceous and much less conspicuous even at full maturity. ... The female cone (megastrobilus, seed cone, or ovulate cone) contains ovules which, when fertilized by pollen, become seeds.
Explanation:
If two transverse waves have the same wavelength, the wave with the __________ has the greatest wave speed.
A. smaller amplitude
B. greater frequency
C. smaller frequency
D. greater amplitude
If two transverse waves have the same wavelength, the wave with the greater frequency has the greatest wave speed.
What are transverse waves?Transverse waves are waves that oscillate along routes that are perpendicular to the direction that the wave is moving forward. Transverse waves include electromagnetic waves (such as radio and light), water surface ripples, and seismic S (secondary) waves.
Transverse waves vibrate in a direction that is opposite to the wave's path of propagation. Because the particles move in a direction that is opposite to the direction of the wave, this sort of wave is given its name. Transverse waves may be electromagnetic or mechanical in nature.
An interference that moves through a medium, like a vibrating string, is known as a mechanical wave.
Therefore, the correct option is B. greater frequency.
To learn more about transverse waves, refer to the link:
https://brainly.com/question/13863548
#SPJ6
two transverse waves have the same wavelength, the wave with the greater frequency has the greatest wave speed. Thus, the correct answer is option B.
1. Wavelength (λ): The distance between successive crests (or troughs) of a wave.
2. Frequency (f): The number of wave crests (or troughs) passing a point per unit time.
3. Wave Speed (v): The speed at which the wave propagates through the medium.
Relationship Between Wave Speed, Wavelength, and Frequency:
The fundamental equation relating wave speed, wavelength, and frequency is:
v = f λ
Given:
- Both waves have the same wavelength (λ).
- To determine which wave has the greater wave speed, we compare their frequencies.
Calculation:
Since the wavelength (λ) is constant for both waves, the wave speed v depends directly on the frequency f:
v ∝ f
This means that as the frequency increases, the wave speed increases proportionally.
- Option B (greater frequency): Since v = f λ and λ is the same for both waves, the wave with the greater frequency f will have a higher wave speed v.
- Options A, C, and D: The amplitude of the wave (Options A and D) does not affect the wave speed. Similarly, a smaller frequency (Option C) results in a lower wave speed.
Identify the nonspecific immune response described
______is characterized by heat redness, swelling and pain.
______is the 1st line of defense that prevents pathogens from entering body.
______causes elevated internal temperatures making a less hospitable environment for
pathogens.
______are white bloods cells that try to consume pathogen.
Options are Fever- Inflammation-Phagocytes-Skin
The initial line of defense against pathogens entering the body is the nonspecific immune response, 1- Inflammation, 2-Skin, 3- Fever, 4-Phagocytes.
What is a nonspecific immune response?Which is marked by heat, redness, swelling, and discomfort.key indicators of inflammation five recognizable symptoms are produced by the body as a result of inflammation.
A tumor (swelling, edema), heat flushing (redness), discomfort, and function loss. Vascular dilatation results in heat and flushing, and an increase in local blood flow gives the area a crimson hue.
The nonspecific immune response, which is marked by heat, redness, swelling, and discomfort, is the body's first line of defense against infections.
Therefore, in nonspecific immune response, 1- Inflammation, 2-Skin, 3- Fever, 4-Phagocytes, is characterized.
Learn more about the immune system, here:
https://brainly.com/question/3495818
#SPJ5
Answer:
1- Inflammation
2- Skin
3- Fever
4- Phagocytes
Study the image.
Global winds. Blue arrows designate cool air. Red arrows designate warm air. Cool air moves from the South and North Poles toward 30 degrees latitude. Warm air moves from 30 degrees latitude toward the equator.
Which statement best describes what the arrows represent?
A. Air continuously blows away from the equator.
B. Air flows in different directions over long distances.
C. Air moves from regions of low pressure to high pressure.
D. Air circulates in an upward direction, creating surface winds.
Answer: B ) Air flows in different directions over long distances
The statement that best describes what the arrows represent is that the Air flows in different directions over long distances. Thus, the correct option for this question is B.
What is the significance of air?The significance of air is determined by the fact that it is the most important component for the survival of life on Earth. We breathe in air. The oxygen present in the air is required for the respiration of living beings.
According to the image, blue arrows designate cool air. Red arrows designate warm air. Cool air moves from the South and North Poles toward 30 degrees latitude. Warm air moves from 30 degrees latitude toward the equator. So, the arrow significantly describes the flows in different directions over long distances.
Therefore, the statement that best describes what the arrows represent is that the Air flows in different directions over long distances. Thus, the correct option for this question is B.
To learn more about Air flow, refer to the link:
https://brainly.com/question/15123898
#SPJ2
2. The Articles of Confederation were easy to change.
(5 Points)
True
False
Answer: True
Explanation:
Answer:
False
Explanation:
The articles of confederation was a document so therefore the person editing it has to write more and then add to another document so it was not easy because not only did the editor have to edit one document he had to edit multiple most likely.
Which of the following is not a factor that describes weather? A) precipitation b) sky conditions c) temperature d) elevation
Answer:
elevation
Explanation:
the other three regularly change and vary in the same location while elevation is something that describes the geography of the location