What happens in a plant after the pollen reaches the pistil?
A
A bird eats the pollen.
B
A new plant sprouts in the flower.
C
A seed grows.
D
A bee picks up the pollen.
In this group, which percentage does the green seed
represent?
O 25%
O 50%
O 75%
Yellow
Yellow
O 100%
Yellow
Green
Differences in function between the wing of a bird and the forelimb of a seal can be explained by:.
Differences in function between the wing of a bird and the forelimb of a seal can be explained by natural selection and adaptation to different environments.
What is evolution?Evolution refers to descendence with modification in an organism, which occurs via natural selection.
Natural selection is the differential reproduction and survival of the more adapted organisms in an environment.
An adaptation is a certain feature that allow organisms to survive in particular environmental conditions.
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For individual organisms in most ecosystems, energy for metabolism originates from:.
Answer: sunlight and carbon dioxide
Explanation:
A person who has very toned muscles likely has.... A.extra nerve cells. B. lots of digestive enzymes. C.tightly packed myofibrils. D.lots of smooth E.R.
We can confirm that a person with very toned muscles likely has tightly packed myofibrils.
What are myofibrils?These fibers are the protein filaments that cause contractions in the structure of the muscle. Weight training tones muscles by increasing the number of myofibrils in a sarcomere, thus increasing its capacity to produce force.
Therefore, we can confirm that a person with very toned muscles likely has tightly packed myofibrils.
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Answer: C
Explanation:
Refer to the illustrations showing a sarcomere in two different stages What does Stage 2 represent?
a muscle that is rotating
a muscle that is fully at rest
a muscle that is fully contracted
Answer:
Stage 2 represents a muscle that is fully contracted.
Explanation:
Verified by correct test results.
Answer:
a muscle that is fully contracted
Explanation:
Imagine that someone from another planet is visiting Earth. They see aeroplanes and birds
moving through the sky,
Explain to the visitor why birds are alive and aeroplanes are not alive, even though they seem to
share some of the characteristics of living things
Birds, like airplanes, must be lightweight as well as powerful. They can fly only because evolution slimmed down their entire anatomy from their reptilian ancestors. Over time, the bones of birds have become lighter and, in the case of many "finger bones," some have disappeared altogether.
Which of the following reasons is proof that viruses are not living cells?
A) Viruses only have DNA.
B)Viruses are covered by a protein coat.
C)Viruses are not capable of replicating outside a host cell.
D)Viruses cause diseases in both plants and animals.
Answer:
c
Explanation:
viruses aren't like bacteria where they could survive on their own.
What is the purpose of spindle fibers during mitosis?
divide the cell in half
organize centrioles
separate sister chromatids
split the nuclear envelope
Answer:
I think the answer Is divide the cell in half and see the explanation
Explanation:
Spindle fibers form a protein structure that divides the genetic material in a cell. The spindle is necessary to equally divide the chromosomes in a parental cell into two daughter cells during both types of nuclear division: mitosis and meiosis
Which of the following is a biotic or an abiotic resource in the environment that causes population size to decrease?
A. Growth Factors
B. Limiting Factors
C. Limiting Nutrient
D. Carrying Capacity
Answer:
Answer islimiting factor.
Explanation:
A limiting factor is anything that constrains a population's size and slows or stops it from growing.
Which describes the chromosome theory of inheritance?
A box is pushed a distance of 4 meters with a force of 10 N. How much work has been done?
6 units of work
40 units of work
14 units of work
No work has been done
The quantity of work done by the box is equal to 40 units of work.
Given the following data:
Distance = 4 meters.
Force = 10 Newton.
How to calculate work done.In Science, work done is generally calculated by multiplying force and the vertical distance (displacement) that is covered by an object.
Mathematically, work done is given by the formula:
Work done = force × distance
Substituting the given parameters into the formula, we have;
Work done = 10 × 4
Work done = 40 units of work.
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Water has several properties that make it unique amongst compounds and make it possible for all forms of known life to function. The graph provided depicts what happens to the density of water as the temperature gets colder. According to the graph, what happens to the water’s density as it freezes and why? (SC.912. L.18.12)
When the temperature of the water finally goes below 4°C, the density of water decreases and as a result ice does not sink. The surface water freezes at 0°C while the lower part remains at 4°C
When the temperature of the water finally goes below 4°C, the density of water increases and as a result, ice doesn’t sink. The surface water freezes at 0°C and the water below freezes as well, allowing life to exist below frozen lakes
Water continues to get denser as the temperature get colder
The properties of cohesion and adhesion are directly responsible for water expansion at 4°C allowing aquatic life to survive under frozen lakes
Water’s density increases as it freezes or at lower temperature which is a unique property of water that enables aquatic animals to survive.
How cold water has more density?Cool water has more density because cooling a substance leads to molecules to slow down and get closer to one another, occupying a smaller volume that results in an increase in density while on the other hand, the warm water is less denser and will float on room-temperature water.
So we can conclude that cold water is more dense and will sink in room-temperature water.
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In the peripheral nervous system, schwann cells participate in the repair of damaged nerves by:.
Schwann cells participate in the repair of damaged nerves by forming a cellular tube that can direct the growth of new axons.
What is Schwann cell?They are referred to as the myelinating cell of the peripheral nervous system and support cells of peripheral neurons.
They participate in nerve cell repair by the formation of a tube that can direct the growth of new axons.
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3. Explain why the CO2 levels from automobiles and
industry are unable to be cycled into the carbon
cycle like normal cellular respiration.
Where is dna stored in octoploid
Answer:
DNA is found in the nucleus of each cell.
Explanation:
The 50 species of hawaiian honeycreepers evolved from how many founding species?.
Answer:
1
Explanation:
2. Summarize the trends you see in each population from each generation. a. Dark bears— b. Light bears—
The black bear has a tendency to proliferate, whereas the polar bear has a tendency to undergo faster extinction because they live in the arctic.
Dark bearsThe black bear (Ursus americanus), also known as the baribal, is a North American bear, found from Alaska to northern Mexico. It reaches 2.20 m in length, 1.10 m in height at the withers and 360 kg in weight.
Light bearsThe polar bear (Ursus maritimus) is a solitary mammal that lives in the icy waters of the Arctic Circle region. It is the largest species of bear that lives in places with low temperatures, being much feared by other animals that inhabit the place.
Considered the largest terrestrial carnivore and main symbol of arctic resistance, the polar bear has been suffering from climate change.
Whit this information, we can conclude that the black bear has a tendency to proliferate, whereas the polar bear has a tendency to undergo faster extinction because they live in the arctic.
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How do vaccines work if the pathogen in them is dead?
Vaccines work by stimulating the immune system to recognize and defend against specific pathogens, such as viruses or bacteria, that cause diseases.
How vaccines workThere are different types of vaccines, including those that contain dead or inactivated pathogens.
When a vaccine contains dead or inactivated pathogens, it means that the pathogens have been rendered non-functional or unable to cause disease. However, they still retain their antigenic properties, which means they can trigger an immune response.
When the dead or inactivated pathogens are introduced into the body through vaccination, the immune system recognizes them as foreign invaders.
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Most of our energy waste in north america results from.
Answer:
. Most of our energy waste in North America results from
A. A failure to turn off lights
B. Technological inefficiency
C. The fact that more efficient energy conversion is not possible
D. Overwhelming public ignorance of conservation issues
E. The fact that energy conservation techniques are quite expensive
B. Technological inefficiency
The left coronary artery typically branches into the __________ interventricular artery and the __________ artery.
The left coronary artery typically branches into the anterior interventricular artery and the circumflex artery.
What is the circumflex artery?The circumflex artery is an artery that branches from the left coronary artery, which is one of the most important arteries in the body.
The circumflex artery is well known to envelop and surround all the heart muscle (cardiac muscle).
The circumflex artery is a fundamental blood vessel in the heart and its damage may have serious health problems.
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Assume all of the presynaptic synapses identified produce epsps. If two of these synapses fired simultaneously, which synaptic combination brings the initial segment closest to threshold based on spatial summation? click on the appropriate synapses.
Based on spatial summation, the synapses closest to each other will brings the initial segment closest to threshold.
What are Excitatory Post-Synaptic Potentials, EPSPs?Excitatory Post-Synaptic Potentials, EPSP, are postsynaptic potential changes that are induced by neurotransmitters which depolarizes the cell, and hence increases the likelihood of initiating a postsynaptic action potential.
Based on spatial arrangement, the summation of two simultaneously fired synapses that is greater than or close to threshold potential will produce an action potential.
Therefore, the synapses closest to each other will brings the initial segment closest to threshold.
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Name one activity that humans do that causes weathering
Answer:
burning coal
Explanation:
hop this is helpful
Predict the movement of water in the picture
Answer:
The water will move out of the cell
Explanation:
This is due to osmosis. We can infer that there is some solute outside that is making the water outside into 75%. As from rules of osmosis, higher concentrations of water will move to lower concentrations of water. So, since the cell has a higher water percentage, water will move from the cell to the outside environment to maintain homeostasis.
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Using the phylogenetic tree which is more related fungi and animals or plants and fungi. Explain why
Answer:
The study of cladistics, however, results in a phylogeny tree in which fungi are more closely related to animals than to plants. In other words, animals have a more recent common ancestor with fungi than with plants, and the mushrooms in your salad are more closely related to you than to the lettuce. Differences Between Fungi and Animals
Explanation:
How do species change over time to adjust to varying conditions?
Should the amendment , which allows for free speech , include all types of speech ? What about bad language racial slurs , and other words that hurt other people's feelings?
Explanation:
No because a speech has to be a meaningful speech
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Which activity would be carried out by a conservation biologist?
conduct survey of a species population in an ecosystem
pass laws restricting pollution
enforce a law restricting the catch of a commercial fishing vessel
purchase land for a conservation easement
Answer:
It would probably be "conduct survey of a species population in an ecosystem"
How does the Siamese fighting fish deal with living in shallow, oxygen poor water?
Explanation:
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Explain the difference between rotating and revolving. Then, describe the rotation and revolution/orbit of Earth.
Answer in at least four complete sentences. (o-o¬)
Be sure to check your grammar and spelling.
You can use the sentence starters and hints below to help you answer the questions:
When the Earth rotates, it is ________________________________.
When the Earth completes one revolution, it is __________________________.
*Hints for your last two sentences: Think about the shape of Earth's orbit, how long one rotation and one revolution take, etc.
Answer:
Rotation is the spinning of an object in one place. Revolution is the circling of an object in a given orbit (path).
Explanation:
When the earth rotates, it spins on its own axis which is tilted at 23.5 degrees. Thus, we can conclude that the earth rotates on its axis every 24 hours relative to the Sun.
When the Earth completes one revolution around the sun in a fixed orbit in 365.25 days. This means the earth takes approximately 365 days to completely encircle around the sun and return back to its original position.
(The extra .25 day is added every year to make up one full day. Hence, we see a leap year every 4 years).