Answer:
your answer is Cell membrane / Plasma membrane
reasons why science teachers think practical sciences is a good thing.
rubric
identify reasons 4 marks
explanation and practical example 16 marks
Science teachers consider practical sciences to be a valuable component of science education for several reasons:
Hands-on Learning: Practical sciences provide students with the opportunity to engage in hands-on learning experiences. This approach allows students to actively explore and manipulate materials, conduct experiments, and make observations.
Example: In a biology class, students may conduct a dissection of a preserved specimen to study the anatomy and structure of organisms. By physically dissecting and examining the different organs and systems, students gain a tangible understanding of the subject matter.
Application of Theory: Practical sciences enable students to apply theoretical knowledge acquired in the classroom to real-world situations. By engaging in practical activities, students can bridge the gap between abstract concepts and their practical applications, fostering a more comprehensive understanding of scientific principles.
Example: In a chemistry class, students might perform experiments to understand chemical reactions and concepts like stoichiometry. By actually mixing and observing different substances, measuring quantities, and analyzing the results, students can see how theoretical concepts translate into practical applications.
Development of Scientific Skills: Practical sciences help students develop essential scientific skills, such as critical thinking, problem-solving, observation, data analysis, and communication. Through practical activities, students learn to formulate hypotheses, design experiments, collect and analyze data, draw conclusions, and communicate their findings effectively.
Example: In a physics class, students could design and conduct an experiment to investigate the relationship between force and motion. By planning the experiment, taking measurements, analyzing the data, and presenting their findings, students enhance their scientific skills and develop a deeper understanding of physics concepts.
Engagement and Motivation: Practical sciences often increase student engagement and motivation in science education. Hands-on activities provide a more interactive and dynamic learning environment, making science more interesting and accessible to students. It can spark curiosity, promote active participation, and cultivate a sense of wonder and excitement about the natural world.
Example: In an environmental science class, students may visit a local ecosystem to conduct field observations, collect samples, and analyze the data they gather. By immersing themselves in the real environment and actively participating in the scientific process, students are more likely to be motivated and engaged in their learning.
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The following table describes five molecules that belong to the same class which class of bio molecule do the molecules in the table belong to
Why is having cephalization an advantage in one area of the body, as opposed to spreading them out in each of the body regions.
Cephalization is the concentration of sensory and nervous structures at the anterior (head) end of an organism. This concentration allows for more efficient and rapid processing of sensory information and quick responses to stimuli.
Having cephalization in one area of the body, specifically the head region, allows for the development of specialized sense organs, such as eyes and ears, which can better detect and process information. In addition, the concentration of neurons in the head region allows for more complex nervous processing, leading to greater cognitive abilities.
On the other hand, spreading out sensory and nervous structures throughout the body would lead to slower processing times and less specialization. This would not be advantageous in environments where quick responses to stimuli are necessary for survival, such as in predator-prey interactions or avoiding environmental hazards.
Therefore, having cephalization in one area of the body provides a significant advantage in terms of sensory processing, cognitive abilities, and survival.
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At a ____________ tectonic plate boundary, plates move away from each other.
Answer:
divergent boundary is correct answer
Which of Earth's spheres are involved in the water cycle?
T A. Atmosphere, lithosphere, hydrosphere, and biosphere
B. Atmosphere, lithosphere, and hydrosphere only
C. Atmosphere and lithosphere only
D. Atmosphere, hydrosphere, and biosphere only
Explanation:
Water sustains life and is an important link between each of the four "spheres" of the Earth system (hydrosphere, atmosphere, pedosphere, biosphere)
The water cycle is the continuous movement of water on, above, and below the surface of the Earth. It is driven by the Sun's energy and involves all four of Earth's spheres: the atmosphere, the lithosphere, the hydrosphere, and the biosphere. Hence option A is correct.
The atmosphere is involved in the water cycle because it contains water vapor. Water vapor rises into the atmosphere and condenses to form clouds.
The clouds then release water back to Earth in the form of precipitation, such as rain, snow, or hail.
The lithosphere is involved in the water cycle because it contains water in the form of groundwater, lakes, rivers, and oceans.
Water evaporates from the surface of the Earth and enters the atmosphere. It then condenses to form clouds and falls back to Earth as precipitation.
The hydrosphere is involved in the water cycle because it contains all of the water on Earth.
The water in the hydrosphere is constantly moving from one place to another, through the processes of evaporation, condensation, precipitation, and runoff.
Therefore option A) Atmosphere, lithosphere, hydrosphere, and biosphere is correct.
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1.
If you were to compare the nucleus to a part of your body, which of the following would be the best choice?
a. your eyes
b. your arms
c. your feet
d. your brain
Answer:
Brain...
Explanation:
What are Bald eagle homologous structures
The wing of a bald eagle is homologous to the wing of a penguin. Homologous structures are structures that are of similar evolutionary origin.
How do we explain?Homologous structures are described as anatomical features found in different species that have a common evolutionary origin. These structures may have different functions in different organisms, but they share a similar underlying structure and can be traced back to a common ancestor.
The wing of a bald eagle and the wing of a penguin are considered homologous structures because they both evolved from a common ancestral structure, even though they serve different purposes which is flight in the case of the bald eagle and swimming in the case of the penguin.
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Deer mice are usually dark brown and live in forests with dark soil. However, the deer mice in the Sand Hills of Nebraska are lighter brown and live in an area with light, sandy soil.
Based on this information, what ,begin emphasis,most,end emphasis, likely caused the change in the Sand Hills deer mice?
Answer options with 4 options
A.
Lighter colored mice were preferred by females.
B.
Lighter colored mice came from snowy habitats in the north.
C.
Lighter colored mice had more dominant genes in their new habitat.
D.
Lighter colored mice were more likely to avoid predators and to reproduce.
Lighter colored mice were more likely to avoid predators and to reproduce. Therefore, option (D) is correct.
The lighter brown coloration of the deer mice in the Sand Hills of Nebraska is likely an adaptation that provides them with a survival advantage in their specific habitat. The light, sandy soil in the area may offer better camouflage for lighter colored mice, making them less visible to predators and increasing their chances of survival.
As a result, these mice would have a higher likelihood of successfully reproducing and passing on their lighter coloration traits to future generations.
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All primates have:
Group of answer choices
A dental comb
Flexible limbs
A grooming claw
Long snouts
Answer:
a dental comb. hope helpful answer
what is telophase stage
Answer: Telophase is the final stage in cell division. During telophase, the nuclear envelopes reform around the new nuclei in each half of the dividing cell. The nucleolus, or ribosome producing portions of the nucleus return. As the cell has finished moving the chromosomes, the main parts of the spindle apparatus fall depolymerize, or fall apart.
Explanation: Hope this was helpful
A forest was studied for decades after a fire that destroyed a 45-hectare area. The abundance of three plant species was measured and recorded over the course of this study. Which explanation describes the changes in population size for species I, II, and III over the course of the experiment?
A)Species I requires high light conditions. Species II and II eventually outcompeted species I for light.
B)Species II and III require deeper soil for their root structures to grow, while species I requires no soil to germinate.
C)Species I requires drier conditions that are found after the fire while species II and II require high periods of rainfall.
D)Species I requires pollinators to migrate into the area in order to facilitate its reproduction while species II and III reproduce in the absence of pollinators.
In some circumstances, the extinction of a native species or the introduction of a non-native species can endanger the existence of other organisms. Because of this, the preservation of endangered species and the management of invasive species are major issues.
How does an ecosystem's carrying capacity depend on its biotic and abiotic limiting elements?Carrying capacity is established by limiting variables. The number of species that may coexist in an environment depends on the availability of both abiotic (such as water, oxygen, and space) and biotic (such as food) variables.
What is a good illustration of an animal community?In biology, a community is a group of interacting species from different species that share a shared habitat. As an illustration, consider a forest with rooted plants and trees that is home to various wildlife.
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Match the following terms with the correct definition.
1. Hypothesis
2. Control
3. Dependent Variable
4. Experiment
5. Conclusion
6. Data
7. Independent Variable
A. Organized process to test a hypothesis
B. An educated guess about the solution to a problem
C. Observations & measurements recorded
D. A judgment based on the results of an experiment.
E. Used to show that the result of an experiment is
really due to the condition being tested
F. The factor that is manipulated during an experiment
G. The response that is measured in an experiment
The match for the given scenario will be 1-B, 2-E, 3-F, 4-A, 5-D, 6-C, and 7-G.
What is an experiment?An experiment is a methodology that is conducted out to confirm or disprove a hypothesis, or to assess the effectiveness or possibility of a method that has never been tried before.
A hypothesis is an educated guess about a problem's solution. Control is used to demonstrate that the outcome of an experiment is truly due to the condition under test.
The component that is manipulated during an experiment is known as the dependent variable. Experiment is a structured process for testing a hypothesis.
A conclusion is a decision based on the outcomes of an experiment. Observations and dimensions are recorded as data.
The response measured in an experiment is known as the independent variable.
Thus, the correct match is 1-B, 2-E, 3-F, 4-A, 5-D, 6-C, and 7-G.
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Both plant and animal cells need to produce energy for cellular functions. In both types of cell, this function is carried out by which organelle?
what adaptation does seed dispersal have
describe how impulse are transmitted across a synapse
A tiny electric message moves through a long part of a brain cell called the axon. When a message goes to the end of a nerve, it sends chemicals called neurotransmitters. These substances move through a tiny gap and attach to special parts of another nerve cell's outer covering.
What are the impulse?Messages called impulses are sent from one nerve cell to another through a connection called a synapse. This process is called synaptic transmission. Synapses are connections between nerve cells or between nerve cells and other cells, like muscles or glands.
The neuron sending the signal is called the presynaptic neuron. When a signal travels down a nerve cell, it causes little sacs called vesicles to release chemicals called neurotransmitters.
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Which examples show repair or replacement of damaged cells? a scrape being healed scars forming where a cut once belonged skin flaking off your arm in the winter
Answer:
Its A & B
Explanation:
a scrape being healed
scars forming where a cut once belonged
Answer:
A and B
Explanation:
i got it right on edge-
The lymphatic vessels that are rich in fat A) are found only in the brain B) are known as lacteals C) enter the left atrium of the heart D) are found only within the spleen
As we know there are special lymph capillaries and are located in the small intestine, specifically in the center of the villi, their function is to absorb fats and fat-soluble vitamins, and in consequence, the lymph in them has a milky appearance due to the high-fat content, these capillaries are known as lacteals, therefore we can say that the correct answer is option B.
The brain and spinal cord are part of the _______ nervous system. The electrical charges that act as nervous signals are called _______. Jellyfish do not have a brain. Instead their nervous system is called a _______. After nervous systems began to develop in bilaterally symmetric animals, some developed ventral, or front, nerve cords, while chordates developed _______ nerve cords. Skeletons that allow for movement by using muscles and squeezing liquid to change the body shape are called _______ skeletons. _______ do not grow with arthropods, and so occasionally must be shed and regrown from chitin. Muscles move endo- and exoskeletons by _______. _______ is the joining of two gametes called sperm and egg. A fish that lays her eggs in a cluster is initiating _______ fertilization. _______ are an adaptation by reptiles to allow for reproduction and embryo development on land. Describe three different strategies used by three different animals to thermoregulate. If you see a snake coiled up in a sunny patch of grass, what can you probably conclude about the type of thermoregulator it is. Why?
The brain and spinal cord are part of the central nervous system.
The electrical charges that act as nervous signals are called action potentials or nerve impulses.
Jellyfish do not have a brain. Instead, their nervous system is called a nerve net.
After nervous systems began to develop in bilaterally symmetric animals, some developed ventral nerve cords, while chordates developed dorsal nerve cords.
Skeletons that allow for movement by using muscles and squeezing liquid to change the body shape are called hydrostatic skeletons.
Exoskeletons do not grow with arthropods, and so occasionally must be shed and regrown from chitin.
Muscles move endo- and exoskeletons by contracting and relaxing.
Fertilization is the joining of two gametes called sperm and egg.
A fish that lays her eggs in a cluster is initiating cluster or mass fertilization.
Amniotic eggs are an adaptation by reptiles to allow for reproduction and embryo development on land.
Describe three different strategies used by three different animals to thermoregulate.
Elephants: Elephants thermoregulate by using their large ears as cooling devices. They flap their ears to increase surface area and enhance heat loss through evaporative cooling.Desert Lizards: Desert lizards employ behavioral thermoregulation by basking in the sun to absorb heat and warming their bodies. They also retreat to shade or burrows to avoid excessive heat when needed.Penguins: Penguins have a unique thermoregulation strategy. They huddle together in large groups to conserve body heat and shield themselves from the cold Antarctic winds, effectively reducing heat loss and maintaining body temperature.If you see a snake coiled up in a sunny patch of grass, what can you probably conclude about the type of thermoregulator it is. Why?
If you see a snake coiled up in a sunny patch of grass, you can probably conclude that the snake is an ectotherm. Ectotherms rely on external heat sources, such as the sun, to regulate their body temperature. By basking in the sun, the snake absorbs heat, which helps raise its body temperature to a suitable level for proper physiological functioning.
Answer:
1. central
2. action potential
3. nerve net
4. dorsal
5. hydrostatic
6. Exoskeletons
7. contraction/contracting
8. Fertilization
9. external fertilization
10. Eggs
11. Animals with fur thermoregulate by panting. Winged birds will flap against their mouths/heads to dissipate heat. Humans will produce sweat to evaporatively cool. Polar bears have developed blubber. Bears drop body temperatures during hibernation.
12. Seeing a snake using the warmth of the sun leads us to conclude that it is likely a thermo conformer that cannot produce its own body heat.
percolation in terms of biology
Answer:
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Explanation:
Percolation in terms of biology means filtration of a liquid substance through a porous medium.
Lithosphere and asthenosphere are in close contact with each other and always move together as a
whole body.
false or
True
what prevents a lake or ocean from freezing solid
Answer:
its sea salt ig(i guess)
Explanation:
Answer:
As the ice forms, it floats and stays on the surface of the lake until a solid sheet of ice is formed. This ice prevents cold air from reaching the water below it - the ice acts as a water blanket for the lake and helps to keep it warmer than it would otherwise.
Hope this helps! <3
8 Sediment samples A through D below have the same volume and packing, but contain different percentages
of various particle sizes.
Sample A: 75% clay and 25% silt
Sample B: 25% clay and 75% sand
Sample C: 50% pebbles and 50% sand
Sample D: 50% pebbles and 50% cobbles
Which sample most likely has the greatest permeability?
(1) A (2) B (3) C (4) D
When sedimenting samples A through D below have the same volume and packing, but contain different percentages the most likely sample with greatest permeability is Sample D: 50% pebbles and 50% cobbles.
What exactly is sediment sampling?Sediment measurement entails measuring the water-sediment mixture to ascertain the mean suspended sediment concentration, particle size distribution, specific gravity, temperature, and other physical and chemical characteristics of the transported solids.Sediment sampling is the process of removing marine, brackish, or freshwater sediments from the seafloor using either professional divers or a grab device, such as the PONAR Grab, so that they can be examined in a licensed laboratory. Grain size, moisture, and pH are typically evaluated, along with metals, PAHs, and PCBs.For more information on sediment sampling kindly visit to
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What is the difference between a dominant color allele and a recessive color allele found in pea plants?
Responses
Both alleles code for proteins that produce pigments. The pigments produced by a recessive color allele are white.
A recessive color allele codes for proteins that produce pigments. A dominant allele does not code for those proteins.
A dominant color allele codes for proteins that are involved in the production of pigments. A recessive color allele does not produce a working version of these proteins.
Both alleles cannot code for any proteins. Purple is the natural color of plant petals when no other factors are involved.
Answer:
A dominant color allele codes for proteins that are involved in the production of pigments. A recessive color allele does not produce a working version of these proteins.
Explanation:
A dominant color allele produces a specific pigment when present, while a recessive color allele does not produce that specific pigment when present.
The dominant allele masks the effect of the recessive allele, meaning that if a plant has one dominant allele and one recessive allele, the dominant allele will determine the color of the plant. However, if a plant has two recessive alleles, the plant will have the color determined by the recessive allele.
In pea plants, the dominant allele codes for purple pigments and the recessive allele codes for white pigments. So when a pea plant has one dominant allele and one recessive allele it will appear purple, and when it has two recessive allele it will appear white.
If a population grows larger than the carrying capacity of the environment, which of these is most likely the cause? O O The death rate must fall AND the birth rate must fall. O The birth rate must stay the same AND the death rate must fall. O The death rate must rise AND the birth rate must rise. The birth rate must rise AND the death rate must fall.
If a population grows larger than the carrying capacity of the environment then the birth rate must rise and the death rate must fall.
Briefing :Population : A population is described as a group of people who belong to the same species and cohabit a particular area. In order to survive over time, members of a population frequently rely on the same resources, are subject to the same environmental restrictions, and depend on the availability of other members.
Birth rate: The birth rate is the proportion of live births to the average annual population for a given year.
Death rate : A population's exposure to the risk of death during a given period is divided by the number of deaths during that period.
Carrying capacity : Carrying capacity is the average population size of a species in a given habitat. Environmental elements like sufficient food, shelter, water, and mates are able to control the population size of the species.
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Scientists believe that _______ of species that once existed on Earth are now extinct.A) about 40%B) about three-quartersC) nearly halfD) over 99 percent
Scientists believe that over 99 percent (D answer option) of species that once existed on Earth are now extinct. This can be known by archeologist research, which allows us to know what species lived in the past by studying the soil, its different layers, and the found fossils, dating with high precision how many years ago those organisms inhabited our planet. With these research tools, we have known that there were at least five massive extinctions on the Earth, where aquatic and terrestrial species perished, and they are the Ordovician-Silurian (around 440 mya), Devonian, the Permian-Triassic, the Triassic-Jurassic, and the Cretaceous-tertiary (65 mya) extinctions.
What is the rate of rainforest deforestation?
Answer:
Deforestation of the Amazon rainforest in Brazil has hit a six-year high, the national space agency, Inpe, reports.
Some 3,988 square kilometres (1,540 square miles) of land were cleared in the region between January and June.
Last year, 3,088 square kilometres of the rainforest were destroyed during the same period.
The Amazon plays an essential role in the planet's oxygen and carbon dioxide cycles, absorbing vast amounts of greenhouse gases from the atmosphere.
Environmentalists blame the increasing levels of deforestation on Brazil's right-wing president, Jair Bolsonaro, who has rolled back environmental protections.
Brazil's environment ministry said it had been forceful in fighting environmental crimes, although in a statement it failed to mention the spike in deforestation.
Which type of soil drained the fastest (IE, the least amount of water needed to be added in order for a drip to appear)? Why do you think that soil drained so well?
Answer:
Sand
Explanation:
Sandy soil contains a lot of sand, which is made up of large particles. Sand drains water very easily.
1. How does the fireflies use its energy to ensure successful reproduction
ASAP
Answer:
It's easy to see that fireflies use energy for reproduction: they actually light up to attract a mate! The glow of fireflies comes from a chemical reaction that happens inside their bodies.
Water molecules moves out of a red blood cell and its shrivels is an example of.
A Protein Channel
B Simple Diffusion
C Facilitated Diffusion
D Osmosis
Answer: D Osmosis
Explanation: Water moves into and out of cells by osmosis
explain the importance of all 3 biomolecules in general and for making ATP.
The three biomolecules that are used for making ATP are Lipids (fats) , Carbohydrates and Proteins
The biomolecules also known as biological molecules serve a wide range of activities and they vary in shape and their size . It is also considered essential to life because they help organisms develop, survive, and propagate. The biomolecules interact with one another which play a role in the development of organisms .
There are four types of biological molecules which are carbohydrates which is used as an energy source , lipids which is used for storage and support , proteins is used for supporting essential vital functions and amino acids are the developing elements that make up proteins and nucleic acids for storing genetic information .
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