Answer:
Flowering plants reproduce sexually through a process called pollination. The flowers contain male sex organs called stamens and female sex organs called pistils. ... Cross-pollination happens when the wind or animals move pollen from one plant to fertilize the ovules on a different plant. The primary purpose of a flower is reproduction. Since the flowers are the reproductive organs of plant, they mediate the joining of the sperm, contained within pollen, to the ovules — contained in the ovary. Pollination is the movement of pollen from the anthers to the stigma.
Explanation:
Answer:
Alternation of generations occurs in plants, where the sporophyte phase is succeeded by the gametophyte phase. The life cycle of a flowering plant. The angiosperms were the last of the seed plant groups to evolve, appearing over 100 million years ago during the middle of the Age of Dinosaurs. Reproductive parts of the flower are the stamen and carpel. Often the carpel is referred to as the pistil, the female parts collectively termed the gynoecium. The androecium is the individual units of the androecium are the stamens, which consist of a filament that supports the anther.
Pollen Pollen grains, from the greek palynos for dust or pollen, contains the male gametophyte phase of the plant. The outer part of the pollen is the exine, which is composed of a complex polysaccharide, sporopollenin. Hypothesized steps in the evolution of the carpel. Nonvascular plants, the mosses, and liverworts have the gametophyte phase dominant. Vascular plants show a progression of increasing sporophyte dominance from the ferns and "fern allies" to angiosperms.
Brainlist Pls!
The HPA axis of the endocrine system works together with the sympathetic nervous system to increase an individual's heart rate, blood flow, and blood sugar levels during times of stress. This stress response is also referred to as the
Answer:
Adrenaline rush aka fight or flight response
Explanation:
Epinephrine adrenaline and norepinephrine a release to focus attention on the task at hand heart rate and blood pressure increase delivering oxygen to the muscles for flight. The eyes take in more light to increase visual acuity and more sugar is released into the bloodstream to increase energy. Functions like digestion, reproductive, and urinary system are slowed
The cytoplasm is the watery fluid found within cells. The cytoplasm holds all of the organelles, except _______, in place within the cell.
A. chloroplasts
B. mitochondria
C. the nucleus
D. vacuoles
Which statement describes an advantage of asexual reproduction?
Asexual reproduction results in variations in DNA.
Asexual reproduction causes less competition for resources.
Asexual reproduction is faster than sexual reproduction.
Asexual reproduction requires more energy than sexual reproduction.
Answer:
The third one
Explanation:
There's only one parent involved and the daughter cells will be identical to the parent cells so it would be quicker
1. Why are earthquakes monitored worldwide instead of in earthquake-prone areas only?
2. How many seismographs are needed to find the epicenter of an earthquake? Why is this
number significant?
Answer:
earthquakes are monitored worldwide because we never know when they will occur, they can happen everywhere in the world even in the areas that are far away from the tectontic plates boundaries. that is why earthquakes are monitored worldwide instead of in earthquake-prone areas only.
Answer:
1. Why are earthquakes monitored worldwide instead of in earthquake-prone areas only?
Earthquakes are monitored worldwide instead of just earthquake-prone areas since earthquakes can happen all over the world, even far away from plate boundaries.
2. How many seismographs are needed to find the epicenter of an earthquake? Why is this number significant?
You need at least three seismographs to find the epicenter of an earthquake. The reason you need three or more seismographs is so you can see where the waves overlap to find the epicenter.
Which of the following does biodiversity NOT contribute to?
a
Food
b
Clothes
c
Wireless Internet
d
Medicine
Please help. This test is timed and this course is way too hard. I will mark Brainliest if you have the best answer! No random answers though. Only answer if you actually know the answer. Or else I report you.
How do the temperaments of cows and bulls compare?
A. Bulls are typically more docile, while cows are more hostile.
B. Bulls are more playful, while cows are more unpredictable.
C. Bulls are more combative, while cows are more maternally protective.
Answer:
C
Explanation:
Bulls are a more extreme version of a cow. A cow is like a mother who cares for her children while a bull is like a rowdy person who does weird and unpredictable things at times. That's why when people hear the word wild cow, they don't usually get frightened but when they hear the word wild bull, they kind of get afraid.
Which characteristics do all bony and jawless fish have in common? Check all that apply.
backbone
swim bladder
scales
gills
bony skeleton
Answer:
Bony fish have Back bone
How does the ocean interact with land and air?
Answer:
Explanation:
One way that the world’s ocean affects weather and climate is by playing an important role in keeping our planet warm. The majority of radiation from the sun is absorbed by the ocean, particularly in tropical waters around the equator, where the ocean acts like a massive, heat-retaining solar panel. Land areas also absorb some sunlight, and the atmosphere helps to retain heat that would otherwise quickly radiate into space after sunset.
The ocean doesn't just store solar radiation; it also helps to distribute heat around the globe. When water molecules are heated, they exchange freely with the air in a process called evaporation. Ocean water is constantly evaporating, increasing the temperature and humidity of the surrounding air to form rain and storms that are then carried by trade winds. In fact, almost all rain that falls on land starts off in the ocean. The tropics are particularly rainy because heat absorption, and thus ocean evaporation, is highest in this area.
Outside of Earth’s equatorial areas, weather patterns are driven largely by ocean currents. Currents are movements of ocean water in a continuous flow, created largely by surface winds but also partly by temperature and salinity gradients, Earth’s rotation, and tides. Major current systems typically flow clockwise in the northern hemisphere and counterclockwise in the southern hemisphere, in circular patterns that often trace the coastlines.
Ocean currents act much like a conveyor belt, transporting warm water and precipitation from the equator toward the poles and cold water from the poles back to the tropics. Thus, ocean currents regulate global climate, helping to counteract the uneven distribution of solar radiation reaching Earth’s surface. Without currents in the ocean, regional temperatures would be more extreme—super hot at the equator and frigid toward the poles—and much less of Earth’s land would be habitable.
Which level(s) in the energy
pyramid represents the
producers?
1 Producers
2 Primary consumers
3 Secondary consumer
4 Tertiary consumers
5 Quaternary consumers
Answer:
1
Explanation:
The diagram on the left shows the layers of Earth's atmosphere and how temperature changes with altitude. The diagram on the right shows the layers of Venus' atmosphere and how temperature changes with altitude. Both diagrams indicate the altitude below which 90% of each atmosphere's mass is located.
According to the diagrams, which of the following statements is true?
A.
90% of the mass of Venus' atmosphere is within 10 km of the surface.
B.
The upper part of Venus' troposphere is about 200°C colder than the upper part of Earth's.
C.
Venus' troposphere is several times thicker than Earth's troposphere.
According to the diagrams. the following statements which is true is the upper part of the Venus' troposphere is about 200°C colder than the upper part of the Earth's atmosphere. Thus, the correct option is B.
What is the relation between troposphere and temperature?As the elevation increases, there is less air above us thus the pressure keeps on decreasing. As the pressure decreases, air molecules spread out further and expand in air, and the temperature of the atmosphere decreases.
Temperature of the atmosphere decreases with the increase in altitude because the troposphere is warmed from below, through the absorption and re-emission of incoming solar radiation by the Earth's surface, rather than it is being warmed from above through the incoming solar radiation.
According to the given diagram, the statement which is true is that the upper part of Venus' troposphere is about 200°C colder than the upper part of Earth's.
Therefore, the correct option is B.
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2. Use the list below to complete the following statements.
Florida panther rain temperature fossils
runoff wetlands pollutants technology
vehicles radios telephones
a. _____________________is the knowledge and tools we use to do difficult tasks.
b. ________________ and ____________________ are all examples of technology we use daily.
c. ___________________ is water that travels over the surface of the land during and after rain. It can carry and nutrients to waterways and disturb ecosystems.
d. When vehicles roll down the roads, the rubber that wears off the tires may run downhill during the next ______________________ .
e. Oil, gas, and other pollutants may pose a threat to Florida's lakes and ______________.
f. Greenhouse gases are chemicals emitted into the atmosphere that add to the overall increase in Earth's _____________________________.
g. Greenhouse gases are produced by burning _______________ fuels, which are the remains of living organisms.
h. When roads cross a habitat, they expose animals within the habitat to increased rates of death due to encounters with __________________________.
i. It is believed that the creation of isolated pockets of animals has likely contributed to the endangerment of the ___________________________.
Answer:
In the Explanation
Explanation:
a. technology
b. radios, telephones
c. runoff
d. rain
e. wetland
f. temperature
g. fossil
h. vehicles
i. panther
Hope this is helpful!
In this exercise, we are completing statements by selecting appropriate words from the given list. Each statement requires us to choose the correct word or words that fit logically and accurately. By carefully reading each statement, we can identify the missing word or words and select the appropriate options from the given list.
a. Technology is the knowledge and tools we use to do difficult tasks.
b. Radios and telephones are all examples of technology we use daily.
c. Runoff is water that travels over the surface of the land during and after rain. It can carry pollutants and nutrients to waterways and disturb ecosystems.
d. When vehicles roll down the roads, the rubber that wears off the tires may run downhill during the next rain.
e. Oil, gas, and other pollutants may pose a threat to Florida's lakes and wetlands.
f. Greenhouse gases are chemicals emitted into the atmosphere that add to the overall increase in Earth's temperature.
g. Greenhouse gases are produced by burning fossil fuels, which are the remains of living organisms.
h. When roads cross a habitat, they expose animals within the habitat to increased rates of death due to encounters with vehicles.
i. It is believed that the creation of isolated pockets of animals has likely contributed to the endangerment of the Florida panther.
It is important to consider the context and meaning of each statement to choose the most suitable word or words from the list. Additionally, being familiar with the definitions and concepts related to the given words can help us accurately complete the statements.
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There were many factors that affected people who lived in the Great Plains during the Dust Bowl era. What was the main factor that drove people from the Great Plains?
Answer: The Dust Bowl was caused by several economic and agricultural factors, including federal land policies, changes in regional weather, farm economics and other cultural factors. After the Civil War, a series of federal land acts coaxed pioneers westward by incentivizing farming in the Great Plains.
Explanation:
1) Manifest Destiny: The US Government wanted settlers to move onto the Plains as they needed the land to be settled and farmed and for communities and towns to grow up and expand. This was needed if the USA was to be a rich and successful country. The government therefore promoted the idea of Manifest Destiny.
How did the underwater volcano form?
Answer:
Underwater volcanoes form much like volcanoes on dry land by a process known as subduction.
Explanation:
This occurs as a result of tectonic plates which form the top layer of the Earth's mantle, just below the Earth's crust. They support the weight of the continents and the combined water of the seas.
Answer:
so ... underwater volcanoes form much like volcanoes on dry land, by a process known as subduction. This occurs as a result of the tectonic plates which form the top layer of the earth's mantle, just below the earth's crust. They support the weight of the continents and the combined water of the seas.
Explanation:
1. What are the necessary criteria for proper measurement of an epicenter location? Are
there any limitations in this virtual lab that make finding the exact epicenter of an
earthquake more difficult?
2. How will knowledge of an earthquake epicenter help emergency management teams
make better earthquake response plans?
Answer:The epicenter locaiton is where the locations overlap. We need to find the Distance to an Epicenter by identifying the S-P intervals from the seismograph. The limitaions in the lab is that we don’t have the actual materials in front of us so we cant find the exact epicenter.
Explanation:
The epicenter locaiton is where the locations overlap. We need to find the Distance to an Epicenter by identifying the S-P intervals from the seismograph. The limitaions in the lab is that we don’t have the actual materials in front of us so we cant find the exact epicenter.
5. What variables could you change in the virtual lab that would allow you to evaluate the
strength of your solutions and any proposed emergency response plans?
S-P wave interval is the variable which could help evaluate strength of solutions and proposed emergency response plans.
What is S-P wave interval?This is referred to the difference in time between the first arrival of the P-wave and the S-wave.
In a virtual lab, it is the distance of the station from the emergency unit which helps evaluate the effectiveness.
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How does volcanic rock in Hawaii turn into sediment?
Answer:
cools down and water helps it
Explanation:
Read the passage. Then write a paragraph that explains why the two ecosystems have such different kinds of plants. Use the terms biotic factor, abiotic factor, and limiting factor in your explanation.
Passage
A group of students is studying the types of plants that grow in a field next to the school. The field is mowed regularly, but it does not get any water other than rainfall. The field has several kinds of plants that are typically found in a grassland ecosystem. But it has none of the plants found in a nearby forest ecosystem.
Answer:
The reason why the ecosystem has many different kinds of plants is because of the soil, or the environment around them. Also, some biotic factors like animals or humans could be the reason. The humans may have planted seeds there, and probably some abiotic things like soil could also be the reason why. The plants that grow there receive a lot of rain, or the limiting factor is the rain, and the type of plants that grow there don't need much water to survive.
Worth branliest only if u get it right please answer properly and not just for points it’s the last question for this homework
Bacteria in the Shigella genus cause the disease shigellosis. The symptoms of shigellosis include diarrhea, fever, and intestinal cramping. The disease is unpleasant, but most people recover within a week. Shigellosis is transmitted from one person to another through bodily wastes. You can catch shigellosis from a baby when changing its diaper. People also catch the disease by drinking contaminated water. The best way to avoid shigellosis is through frequent hand-washing with soap.
A strategy for fighting bacterial infections uses viruses. Viruses that infect bacteria are called bacteriophages. Phage comes from the Greek word for “eater.” Explain why it is not accurate to call a virus that kills bacteria a “bacteria eater." What happens when a virus attacks a cell?
PLS HELP LIKE ASAP
1.DNA is made of chains of four smaller molecules called: (9 Points)
A. nucleotides
B. mitochondrial bases
C. life blocks
D. DNAblers
2.The four differing nucleotide parts, called bases, are made of a few: (9 Points)
A. Carbon and oxygen atoms
B. Hydrogen atoms
C. Nitrogen and phosphorus atoms
D. All of the above
3.You can think of DNA as a great library of information that exists to do one thing only. What is that thing? (9 Points)
A. Build other double helix models of information.
B. Tell the brain how to construct the body.
C. Store data about what worked and what did not.
D. Direct the building of different protein molecules.
4.It's estimated that all the chromosomes together house about 20,000 individual instructions calledImmersive Reader (9 Points)
A. Genes
B. Base pairs
C. Chromatophores
D. Lipids
Answer:
a
Explanation:
Answer:a,c,b,d
Explanation:
3. What is the relationship between S- and P-waves?
4. How did the study of earthquake waves lead to a greater understanding of the interior
structure of Earth?
Answer:
3. What is the relationship between S- and P-waves?
The relationship between S and P waves is that they both arrive before surface waves, but P waves arrive before S waves.
4. How did the study of earthquake waves lead to a greater understanding of the interior structure of Earth?
The study of seismic waves led to a better understanding of the interior of Earth since these waves travel at different speeds in different materials. This study has helped scientists get a better understanding of the inner components of Earth.
How does the magma in underwater volcanoes in Hawaii form?
Answer:ike a blowtorch, the heat transforms deep rocks into oozy magma
Explanation:
Answer:
Like a blowtorch, the heat transforms deep rocks into oozy magma. The magma rises upward until it erupts onto the seafloor. When the sizzling lava (which is what magma is called when it erupts) hits the cooler water, it hardens into an underwater volcano, the heat transforms deep rocks into oozy magma
Explanation:
What evidence have you discovered to explain how cells are organized in the body, similar to the way dots in pointillism art is organized.
Answer:
it depends where the the muscle is located and what is the purpose
Explanation:
How many hydrogen bonds are between A and T, and C and G?
Answer:
A and T form two hydrogen bonds with one another, while G and C form three hydrogen bonds with one another.
Explanation:
the punnett square below shows a cross between a pea plant with yellow seeds and a pea plant with green seeds
If mating produces 100 offspring, about how many will have yellow seeds?
A. 25
B. 50
C. 75
D. 100
life iscience 7th grade
Answer:
D
Explanation:
The yellow pea is dominant so if it is crossed with a pure recessive then they will all be yellow
According to Punnett Square, if mating produces 100 offspring, then all of them will have yellow seeds. Thus, the correct option for this question is D.
What is the Punnett Square?The Punnett Square may be characterized as a kind of table in which all of the plausible consequences for a genetic cross between two individuals with known genotypes are systematically demonstrated.
According to the question, there is a homozygous dominant genotype of one parent when crossed with the heterozygous genotype of other parents, then the genotypes of resultant offspring must carry at least one dominant allele which governs the phenotype of the entire offspring.
Therefore, according to Punnett Square, if mating produces 100 offspring, then all of them will have yellow seeds. Thus, the correct option for this question is D.
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An eagle on a tree branch sees an injured squirrel 50 meters away on the ground. The eagle then flies from the tree to prey on the injured squirrel. Which of the following best describes what happened with the eagle before it started to fly toward the squirrel?
A.
The eagle was born with the ability to prey on squirrels, so no brain activity was required.
B.
The eagle's brain recognized the squirrel as prey.
C.
The sight of the squirrel came only from the eagle's memory, which stimulated the muscles to move.
D.
The sense received from the squirrel went directly to the eagle's eyes to its muscles.
PLZ PLZ PLZ I AM BEGGING YOU HELPPPPPP I SUCK AT SCIENCE I NEED HELP SO PLZ PLZ PLZ PLZ HELPPPPPP I DON'T HAVE A CLUEEEEEE
Taking into consideration the sensitivity of the balance, what do you conclude about the mass of salt and water as the salt dissolves?
It can be concluded that the mass of salt and water gets lighter as the salt dissolves.
Give an example of how the environment can affect an organism’s phenotype
Answer: Environmental conditions, such as temperature and availability of nutrients can affect phenotypes. For example, temperature affects coat color in Siamese cats. ... Height in humans is a complex phenotype influenced by many genes, but it is also influenced by nutrition
Explanation: Hope this helps luv :)
please answer this one short question
i need helppppp
one science question
Answer:
B
Explanation:
It's B because that's exactly what the question just described the water going through it's cycles
Help Me! Pick An Scenario! Thank you!
Answer: I would pick scenario 3.
Explanation:
It talks about a relevant factor in a local state. More and more trees are being chopped down today. This can make a community lack natural and fresh air.