Answer:
B
Explanation:
It is really bad if the radio active waste spilled and got in the water or get on people. Putting it where other backround radiations are will worsen the area and may affect the waste. the earthquake area would put the facility indanger of coming down and spilling the waste all around it.
A student collected the animal shown below on field trip. The student used a dichotomous key and a microscope to classify the animal.
How should this animal be classified?
A. Arthropoda
B. Annelida
C.Mollusca
D. Platyhelminthes
Answer: The answer is D: Platyhelminthes
Explanation: took the test and it came back
what is the difference beween respiration and breathing
Answer:
Breathing: is the physical process of exchanging gases
respiration: is a chemical process that takes place at a cellular level and produces energy.
How will antibiotic resistance affect human populations if no action is taken by our healthcare system?
Answer:
Bacteria, not humans or animals, become antibiotic-resistant. These bacteria may infect humans and animals, and the infections they cause are harder to treat than those caused by non-resistant bacteria. Antibiotic resistance leads to higher medical costs, prolonged hospital stays, and increased mortality
20 points
1. Some students used vinegar to dissolve away the shells of three eggs
and used these eggs as models of human red blood cells. The students
observed the changes in the eggs when they were placed in different
solutions. Which statement best describes the role of the cell membrane
in this model? *
Answer:
where is the 20 points!!!!!!!
Fossils and Evolution On Study Island
A team of scientists are studying three different layers of sedimentary rock to learn about a particular reptile species. In the layer of rock that is closest to the Earth's surface, the reptiles' teeth fossils are found to be short and straight. In the layer below, the reptiles' teeth fossils are found to be long and straight. In the layer below that, the reptiles' teeth fossils are found to be long and curved.
Based on this information, the reptiles today most likely have
A.
long, straight teeth.
B.
no teeth.
C.
long, curved teeth.
D.
short, straight teeth.
Answer: short, straight teeth
Explanation: study island
Can y’all help me with 3 & 4 please I beg you I need to pass this test
Answer:
A
Explanation:
I think an untreated water can carry disease causing organisms and make people sick
6N right and 10N & 2N left
If only one species is considered the 'fittest', why do we still have so many variation among species?
Answer:
Variation occurs in species with the genes resulting in the traits and physical characteristics that make it possible for them to be among the fittest for a number of reasons:
1. Mutation
2. Recombination and
3. Migration
Explanation:
Mutations: A mutation is a deviation from the norm in a DNA sequence. It can be stimulated by errors during the DNA replication process which happens as the cell is dividing, or by exposure to ionizing radiation, chemicals, or viral infection (whether artificial or natural).
It is noteworthy that naturally, without any human intervention, the possibility of a spontaneous mutation is very low.
Recombination: This refers to the creation of new fusion of genes in the offspring that did not occur in the parents by the processes of crossing-over and independent assortment. Independent assortment meaning that the allele the gamete received for one gene was not influenced by the allele received for another gene.
Migration: Variation by migration here refers to the introduction of new genes from into one population by another. This could happen when a new population arrives at an existing one or when an existing one migrates to another population.
We can say for example that, genes from Americans have “migrated” into the population of African origin in America given the continuous immigration of Africans into America.
So in both populations, there are very fit species, but when their genes are mixed during cross-reproduction, variation arises.
Cheers
Although many human cells have specialized functions, they all have the same shape and size.
A. false
B. true
Sand for beaches comes from rocks in the area that are weathered down, and
their sediment is deposited in the area beaches. The beaches are then eroded,
and the sediment is moved away from the beaches. If rocks stopped weathering,
how would the beach change?
Answer:
Beaches would shrink until they were no longer there because the sediment is pulled away from the shores by the tide and there would be no new rock sediment to replace the old rock sediment.
Predict what color of monkey flower has the highest likelihood of occurring in a habitat with a large population of bees and few hummingbirds. Graph the distribution of color in monkey flowers in this habitat to support your answer.
Answer:
Monkey flower plants have opposite, undivided leaves and solitary flowers with a two-lipped open corolla (fused petals). The flowers of some species are said to resemble a monkey’s face. The herbaceous species typically grow most abundantly in wet areas, usually near running water.
Explanation:
Which is not part of the function of the normal cell cycle? (A) cell growth (B) DNA replication (C) cell division (D) cell death
Cell death is not part of the function of the normal cell cycle, a strictly controlled cell mechanism known as programmed cell death, or apoptosis, hence option d is correct.
What is cell death?Eliminates cells that are no longer required or pose a hazard to the organism in multicellular creatures.
The body's mechanism of cell death is crucial. When cells are not required, as at some developmental phases, for example, they are removed.
For instance, the outer layer of the skin is formed of dead cells, which form a structure in the body that is also apoptosis.
Therefore, cell growth, DNA replication, cell division are part of the cell cycle, a controlled cell death mechanism known as programmed cell death, or apoptosis, hence option D is correct
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Surface mining for coal involves removing all the vegetation and rock above the coal being mined. Which two of Earth's subsystems are most immediately affected by surface mining? Select one: A. Biosphere and hydrosphere. B. Geosphere and biosphere. C. Hydrosphere and atmosphere. D. Atmosphere and geosphere.
Answer:
B. Geosphere and biosphere.
Explanation:
Earth as a planet can be subdivided into subsystems called "spheres". The spheres that make up the Earth are as follows; geosphere or lithosphere, hydrosphere, atmosphere, biosphere etc.
As related to this question:
- The GEOSPHERE refers to the solid part of the Earth, which involves rocks, minerals etc. of the Earth crust. It can be regarded to be the physical land.
- The BIOSPHERE refers to a collection of all the living organisms inhabiting the Earth. This includes plants, animals, microbes etc.
According to these question, surface mining for coal is an act that involves removing all the vegetation and rock above the coal being mined. This means that the physical land/rocks (geosphere) and vegetation of plants (biosphere) covering the coal beneath are affected. Hence, based on the explanation above, GEOSPHERE and BIOSPHERE are two of Earth's subsystems most immediately affected by surface mining.
Define these types of relationships (symbiosis).
a. mutualism -
b. commensalism-
c. parasitism -
d. predator/prey -
e. competition -
Answer:
mutualism -Both species benefit
commensalism- One species lives with, on, or in another species (the host). The host species neither benefits nor is harmed from the relationship. The species that lives on the host is benefited.
parasitism - One species (the parasite) lives with, on, or in a host species, at the expense of the host species. Unlike in predation, the host is not immediately killed by the parasite, though it may sicken and die over time.
predator/prey -One species (the predator) hunts and kills another species (the prey)
competition -The struggle among organisms for the same limited resources in an ecosystem
Explanation:
Name any three specifications that reduce carbon dioxide expenditure and promote biodiversity in the neighborhood you chose.
Hello. You have not shown the neighborhoods to which the question relates, which makes it impossible for your question to be answered accurately. However, I will try to help you in the best possible way.
The best way to reduce spending on carbon dioxide and increase biodiversity in a neighborhood is to provide tree planting through urban afforestation. A well-wooded neighborhood, it has a lower concentration of carbon dioxide because the plants absorb this gas releasing oxygen in place. In addition, some animals such as birds would attract them, in addition to promoting fruit and shade for the neighborhood.
Answer:
The most ideal way to lessen spending on carbon dioxide and increment biodiversity in an area is to give tree establishing through metropolitan afforestation. A well-lush area, it has a lower centralization of carbon dioxide in light of the fact that the plants assimilate this gas delivering oxygen set up. Likewise, a few creatures, for example, birds would draw in them, as well as advancing products of the soil for the area.
What book should I read to enrich my biology knowledge?
Some viruses replicate via the lytic cycle by
Use the words flexor and extensor to explain how muscles work in pairs.
By contracting, muscles pull on bones and allow the body to move. ... Each muscle in the pair works against the other to move bones at the joints of the body. The muscle that contracts to cause a joint to bend is called the flexor. The muscle that contracts to cause the joint to straighten is called the extensor
Describe why valinomycin is an effective antibiotic agent
Answer: a naturally occurring depsipeptide used in the transport of potassium
classifying burning oil as clean up method
a. mechanical
b. chemical
c. biological
Answer:
Chemical, because the chemical reaction of the oil being lit on fire cannot be reversed
Explanation:
Name and explain each lymph organ.
Explanation:
What are the organs of the immune system?
Publication Details
Our immune system is made up of both individual cells and proteins as well as entire organs and organ systems. The organs of the immune system include skin and mucous membranes, and the organs of the lymphatic system too.
Organs that function as barriers
Your skin and mucous membranes are the first line of defense against germs entering from outside the body. They act as a physical barrier with support from the following:
Antibacterial substances can kill germs right from the start. A certain enzyme found in saliva, the airways and tear fluid destroys the cell walls of bacteria.
Mucus in the bronchi helps trap many of the germs we breathe in so they can be moved out of the airways by hair-like structures called cilia.
Stomach acid stops most of the germs that enter the body in the food we eat.
Harmless bacteria on our skin and many of the mucous membranes in our body also act as part of the immune system.
In addition, the reflexes that cause us to cough and sneeze help to free our airways of germs.
Illustration: The parts of the immune system
The parts of the immune system
Lymphoid organs
The lymphatic system is composed of:
Primary lymphoid organs: These organs include the bone marrow and the thymus. They create special immune system cells called lymphocytes.
Secondary lymphoid organs: These organs include the lymph nodes, the spleen, the tonsils and certain tissue in various mucous membrane layers in the body (for instance in the bowel). It is in these organs where the cells of the immune system do their actual job of fighting off germs and foreign substances.
Bone marrow
Bone marrow is a sponge-like tissue found inside the bones. That is where most immune system cells are produced and then also multiply. These cells move to other organs and tissues through the blood. At birth, many bones contain red bone marrow, which actively creates immune system cells. Over the course of our life, more and more red bone marrow turns into fatty tissue. In adulthood, only a few of our bones still contain red bone marrow, including the ribs, breastbone and the pelvis.
Thymus
The thymus is located behind the breastbone above the heart. This gland-like organ reaches full maturity only in children, and is then slowly transformed to fatty tissue. Special types of immune system cells called thymus cell lymphocytes (T cells) mature in the thymus. Among other tasks, these cells coordinate the processes of the innate and adaptive immune systems. T cells move through the body and constantly monitor the surfaces of all cells for changes.
Lymph nodes
Lymph nodes are small bean-shaped tissues found along the lymphatic vessels. The lymph nodes act as filters. Various immune system cells trap germs in the lymph nodes and activate the creation of special antibodies in the blood. Swollen or painful lymph nodes are a sign that the immune system is active, for example to fight an infection.
Spleen
The spleen is located in the left upper abdomen, beneath the diaphragm, and is responsible for different kinds of jobs:
It stores various immune system cells. When needed, they move through the blood to other organs. Scavenger cells (phagocytes) in the spleen act as a filter for germs that get into the bloodstream.
It breaks down red blood cells (erythrocytes).
It stores and breaks down platelets (thrombocytes), which are responsible for the clotting of blood, among other things.
There is always a lot of blood flowing through the spleen tissue. At the same time this tissue is very soft. In the event of severe injury, for example in an accident, the spleen may rupture easily. Surgery is then usually necessary because otherwise there is a danger of bleeding to death. If the spleen needs to be removed completely, other immune system organs can carry out its roles.
Select the correct answer.
Which of these activities increases the amount of carbon in the atmosphere?
A. animals eating plants
B. burning of fossil fuels
C. fossilization
D. photosynthesis
Reset
Answer:B. burning of fossil fuels
Explanation:
The amount of substance given one time
Answer:
moles
hope this helps
have a good day :)
Explanation:
Question 24 (6 points)
✓ Saved
Within a forest and stream ecosystem, there is a food web that includes grasses,
rabbits, grasshoppers, foxes, and snakes. Answer the following questions for 2
points each:
1. Identify TWO density-dependent limiting factors that could affect the rabbit
population.
2. Explain how a shortage of ONE of the limiting factors would impact both a large
population of rabbits and a small population of rabbits.
3. Identify ONE other organism for which the rabbits would be a limiting factor and
explain how the original limiting factor in question 2 would affect the second
organism.
Answer: Question 24 (6 points) ✓ Saved Within a forest and stream ecosystem, there is a food web that includes grasses, rabbits, grasshoppers, foxes, and snakes. Answer the following questions for 2 points each: 1. Identify TWO density-dependent limiting factors that could affect the rabbit population. 2. Explain ...
Explanation:
a food web that includes grasses, rabbits, grasshoppers, foxes, and snakes. Answer the following questions for 2 points each: 1. Identify TWO density-dependent limiting factors that could affect the rabbit population. 2. Explain ...
what is an adaptation
Answer:
a change or the process of change by which an organism or species becomes better suited to its environment
Explanation:
Answer:
ad·ap·ta·tion
/ˌadapˈtāSH(ə)n/
Learn to pronounce
noun
the action or process of adapting or being adapted.
"the adaptation of teaching strategy to meet students' needs
"filming her adaptation of a beloved children's book
Explanation:
Just search it up
When a population is is experiencing exponential growth, which of the following is true?
A. Birth and immigration rate is less than death and emigration rate.
B. The population has reached its carrying capacity.
C. Birth and immigration rate is greater than death and emigration rate.
D. Birth and immigration rate is equal to death and emigration rate.
Answer:
A. Birth and immigration rate is greater than death and emigration rate.
Explanation: trust
Birth and immigration rate is greater than death and emigration rate. Therefore, option (C) is correct.
What is exponential growth?Exponential growth is a type of population growth pattern in which a population size increases at an accelerating rate, with each generation or time period adding a larger number of individuals than the one before it. This type of growth results in a population having a higher total number of members than it did in the previous generation.
To put it another way, the rate of population growth picks up steam over the course of time, producing a J-shaped curve when the data is plotted on a graph. This pattern can emerge when there is an abundance of resources available to a population but only a moderate amount of competition for those resources. This results in rapid reproduction and population growth as a result.
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The data in the diagram is evidence that -
Answer: G. Horses slowly developed over time
Explanation:
what biome receives a lot of rain, moderate temperatures, and a long growing season
A. coniferous forest
B. taiga
C. deciduous forest
D. grassland
Biome that receives a lot of rain, moderate temperatures, and a long growing season is grassland. Thus, option D is correct.
What is ecosystem?Ecosytem is defined as a community that is biological by nature and the organism in that community attract with each other as well as their physical environment. Ecosystem is consist of both biotic as well as abiotic factor. The living components of ecosystem comes in category of biotic factor and non living components of ecosystem comes in category of abiotic factor.
Biodiversity is all the different kinds of life living in a particular area like the varity of animals, plants, fungi and microorganisms like bacteria and virus that plays a major role in framing of natural world usually three levels of biodiversity are observed and these are genetic species, and ecosystem diversity.
Biodiversity is very important for the process that's support all life present on earth including human.
Therefore,Biome that receives a lot of rain, moderate temperatures, and a long growing season is grassland. Thus, option D is correct.
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An elementary school science teacher decided to liven up the classroom with a salt-water aquarium. Knowing that salt-water aquaria can be quite a hassle, the teacher proceeded stepwise. First, the teacher conditioned the water. Next, the teacher decided to stock the tank with various marine invertebrates, including a polychaete, a siliceous sponge, several bivalves, a shrimp, several sea anemones of different types, a colonial hydra, a few coral species, an ectoproct, a sea star, and several gastropod varieties. Lastly, some vertebrates - a parrotfish and a clownfish - were added. She arranged for daily feedings of copepods and feeder fish.
The teacher was unaware of the difference between suspension feeding and predation. The teacher thought that by providing live copepods (2 mm long) and feeder fish (2 cm long) the dietary needs of all of the organisms would be satisfied. Consequently, which two organisms would have been among the first to starve to death (assuming they lack photosynthetic endosymbionts)?
1. sponges
2. coral animals
3. bivalves
4. sea stars
5. shrimp
Answer:
sponges
Explanation:
because sponges need photosynthesis in order manufacture their food
The organisms namely sponges and coral animals are most likely to starve to death in the lack of photosynthetic endosymbionts. The correct option is 1 and 2.
What are endosymbionts?Endosymbionts are organisms that live in close proximity to another cell or organism.
As sponges are predominantly filter feeders, consuming detritus, plankton, viruses, and bacteria. They also absorb nutrient solution from water directly through their pinacocyte cells.
Due to the lack of photosynthetic endosymbionts the organisms namely sponges and coral animals are most likely to starve.
Thus, the correct option is 1 and 2.
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Energy + 6 CO2
6 H20 → CH2206
602
Photosynthesis
O Cellular Respiration
help ‼️
Answer:
photosynthesis
Explanation: