Explanation:
Porosity depends on the size, shape, and mixture of grains and particles that compose soil and rock. For instance, small particles such as clays can compact more closely together, reducing the amount of porosity. However, larger particles such as sand and gravel will have more spaces available between them.
The amount of air pressure on your body is equivalent to the weight of:
a.
Your body
c.
4 loaves of bread
b.
Two elephants
d.
17 cats
Please select the best answer from the choices provided
A
B
C
D
Answer:
Two elephants Is the correct answer!
Hope it helps
How many objects must be present in a system to demonstrate gravity as a force of attraction?
Answer:
Explanation:
Knowing the value of G allows us to calculate the force of gravitational attraction between any two objects of known mass and known separation distance. As a first example, consider the following problem.
What are the major changes that occur after puberty?
Answer:
The following are additional changes that may happen for the male as he experiences the changes of puberty: His body size will increase, with the feet, arms, legs, and hands sometimes growing faster than the rest of the body. This may cause the adolescent boy to experience a time of feeling clumsy.
Explanation:
1. Does the insect have wings? a. Yes………………………………………………………………………… go to step 2 b. No…………………………………………………………………………. Order Hemiptera 2. Does the insect have parallel wings? (hint: Parallel wings don’t stick out to the side) a. Yes……………………………………………………………………………… go to step 3 b. No………………………………………………………………………………. go to step 4 3. Does the insect have a parallel line down the back that divides the wings? a. Yes…………………………………………………………………………… Order Coleoptera b. No …………………………………………………………………………… Order Orthoptera 4. Does the insect have 4 total wings? a. Yes………………………………………………………………………………… go to step 5 b. No………………………………………………………………………………… Order Diptera 5. Does the insect have long antennae? a. Yes………………………………………………………………………………go to step 6 b. No……………………………………………………………………………… Order Odonata 6. Does the insect have a small body with large fan –shaped wings? a. Yes…………………………………………………………………………… Order Lepidoptera b. No………………………………………………………………………………Order Hymenoptera
Complete question: You will find the image in the attached files
Based on the dichotomous key below, what order does this insect belong to?
1. Does the insect have wings?
a. Yes………………………………………………………………………… go to step 2
b. No…………………………………………………………………………. Order Hemiptera
2. Does the insect have parallel wings? (hint: Parallel wings don’t stick out to the side)
a. Yes……………………………………………………………………………… go to step 3
b. No………………………………………………………………………………. go to step 4
3. Does the insect have a parallel line down the back that divides the wings?
a. Yes…………………………………………………………………………… Order Coleoptera
b. No …………………………………………………………………………… Order Orthoptera
4. Does the insect have 4 total wings?
a. Yes………………………………………………………………………………… go to step 5
b. No………………………………………………………………………………… Order Diptera
5. Does the insect have long antennae?
a. Yes………………………………………………………………………………go to step 6
b. No……………………………………………………………………………… Order Odonata
6. Does the insect have a small body with large fan –shaped wings?
a. Yes…………………………………………………………………………… Order Lepidoptera
b. No………………………………………………………………………………Order Hymenoptera
Answer:
ORDER ODONATA
Explanation:
It is simple to read a dichotomous key. You only need to understand the technical terminology and to detailed observe your specimen. The key will lead you to the answer.
1. Does the insect have wings?
a. Yes………………………………………………………………………… go to step 2
b. No…………………………………………………………………………. Order Hemiptera
We only need to answer this question by looking at the image. In our example, yes, the insect has wings. So we need to go to question number two. Note: In the hypothetical case that the insect would not have wings, it would belong to the Hemiptera order.
2. Does the insect have parallel wings? (hint: Parallel wings don’t stick out to the side)
a. Yes……………………………………………………………………………… go to step 3
b. No………………………………………………………………………………. go to step 4
Ok, here it tells you that parallel wings do not stick out to the side. But in our example, wings do stick out, so the answer should be NO. This species does not have parallel wings. As it is a NO, we go to question number 4.
Note: In the hypothetical case that the insect would have parallel wings, we should read number 3.
4. Does the insect have 4 total wings?
a. Yes………………………………………………………………………………… go to step 5
b. No………………………………………………………………………………… Order Diptera
This one is easy. How many wings our specimen has? Four. Then it is a YES, and we go to question number 5. Note: In the hypothetical case that the insect would not have 4 wings, it would belong to the Diptera group.
5. Does the insect have long antennae?
a. Yes………………………………………………………………………………go to step 6
b. No……………………………………………………………………………… Order Odonata
Our insect has very short antennae. They are not long at all. So, the answer is NO, the insect does not have long antennae. This answer leads us directly to the order of our individual. ORDER ODONATA. Note: In the hypothetical case that the insect would have long antennae, we should read question number 6. And so on until we would reach the order.
ORDER ODONATA:
Dragonflies belong to this group. These insects characterize as having big eyes, and the separation between them depends on the species. They have an elongated abdomen, sometimes even longer than the wings. Their bodies must be robust to support the massive musculature that propels the wings during flight. The wings are long, big, and wide.
Usually, the males are much more colored than the females are.
All organisms must regulate by turning genes on and off in different cells at different times.
a. True
b. False
Answer:
a. True
Explanation:
The genome can be defined as the complete set of genetic information of an organism which is responsible to produce all the biological components required to carry out its metabolic functions (i.e., development, growth, reproduction, etc). These genes are transcriptionally expressed to produce mRNAs which are subsequently used to synthesize specific proteins (i.e., enzymes and structural proteins) by the process of translation. All organisms (i.e., either unicellular or multicellular organisms) exhibit specific gene expression programs by which such genes are regulated over time. Within the cell, gene regulation is essential to carry out biological processes ranging from development and differentiation to cell cycle arrest. These gene expression programs are acutely regulated via genetic (e.g., transcription factor binding) and epigenetic (e.g., DNA methylation) mechanisms, which work together in order to turn on/off genes during development.
Farmers need to make many decisions about how they grow their crops. One of these decisions is whether to use synthetic fertilizer or organic fertilizer, such as manure.
An advantage of using synthetic fertilizer instead of organic fertilizer is that
A synthetic fertilizer can provide more targeted macronutrients to the crops
B) synthetic fertilizer remains in the soil longer than organic fertilizer does, reducing the volume needed and, therefore, the cost to the farmer
c) synthetic fertilizer adds to soil texture and increases the soil's water-holding capacity
organic fertilizer runs off more readily into waterways, leading to nutrient overload
An advantage of using synthetic fertilizer instead of organic fertilizer is that
synthetic fertilizer can provide more targeted macro nutrients to the crops.
Synthetic fertilizers are used by farmers to increase crop yield. The fertilizer
are specially formulated to ensure all the macro-nutrients are present in the
right proportions for optimal yield of the crops.
This is the advantage synthetic fertilizers have as organic fertilizer don't
contain all the targeted macro nutrients in the right amounts.
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How is drought a limiting factor?
Answer:
Answer
Explanation:
It cause for disasters like lost of crop which causes no food and starvation. It also causes farms to lose money and thus is limiting farming,the citizens,and even the economy .
Geologists believe that the Earth's layers vary in depth, pressure and temperature. Since pressure and
temperature affect density , each layer has a different density as well. The density of Each layer determines its
position inside Earth.
From the table which layer is the least dense? What is the density of this layer?
Answer:
The least dense layer of the Earth is the crust. The crust density is 2.5 g/cm3
What belongs there in the box
Answer:
Tissu
Explanation:
believe me my friend
Scientists analyzed data collected over a period of years in a game reserve in South Africa to test the hypothesis that competition with lions limits the abundance of leopards in the same community. The game reserve encompasses a variety of habitats, from open grassland to wooded areas around rivers and streams. It contains most of the indigenous mammal species and an adequate availability of their prey. For the most part, the leopards and lions show similar habitat preferences in the reserve.
The mass of the average lion is about three times that of the average leopard. The scientists analyzed several factors that might influence the abundance of each population, including the sizes of the animals preyed on by each species
Size of Prey Animal Percent of Leopards’ Prey (±2SEx¯) Percent of Lions’ Prey (±2SEx¯)
Small 34 ± 2 3 ± 1
Medium 63 ± 3 23 ± 2
Large 3 ± 1 36 ± 4
Very large 0 38 ± 3
Because competition with lions might affect the population size of the leopards, the scientists also analyzed data on the lion and leopard population sizes in the game reserve (Figure 1).
Required:
Describe what scientists mean when they refer to an ecological community such as that shared by the leopards and lions.
Answer:
The correct answer would be - these are the ecological community that shows the interspecific competition.
Explanation:
In this ecological community, both predators lion and leopards are living together and by the given data and information it is evident that they both share the same habitat and they both depend on the same prey for their food.
This cause competition between both lion and leopard for food and habitat. Such competition or interaction is referred to as the interspecific competitions negatively impacted by the presence of the other because they will have less food.
Answer
An ecological community refers to all of the interacting populations in a defined habitat.
Explanation:
see above
What might happen to the Earth if human increase the amount of greenhouse gasses?
Explain your answer.''
Answer:
Greenhouse gas refers to any gaseous compound in the atmosphere that can absorb infrared radiation, thereby trapping heat and keeping it in the atmosphere. By increasing the heat in the atmosphere, greenhouse gases are responsible for the greenhouse effect, which ultimately leads to global warming.
Examples why greenhouse gases in the atmosphere:
farming cattle releases methane farming rice in paddy fields releases methane burning fossil fuels in vehicles and power stations releases carbon dioxide deforestation releases carbon dioxide and reduces the absorption of carbon dioxide through photosynthesisExplanation:
the ozone layer will be destroyed and the dangerous sun ray will cause alot of disaster
What are the 3 main characteristics of populations?
Answer:
Population Size and Density: Total size is generally expressed as the number of individuals in a population. ...
Population dispersion or spatial distribution: ...
Age structure: ...
Natality (birth rate): ...
Mortality (death rate):
Explanation:
Answer:
Size, Spatial Distribution and age structure or, birth and death rates.
Explanation:
Demography is the study of a population, the total number of people or organisms in a given area. Understanding how population characteristics such as size, spatial distribution, age structure, or birth rates change over time can help scientists and/or governments.
Please match each description to the correct group of microorganisms.
1. Single-celled prokaryotes (Click to select)
2. Single or multi-cellular eukaryotes that photosynthesize to obtain energy (Click to select)
3. Multicellular eukaryotic organisms like parasitic worms (Click to select)
4. Minute acellular particles that parasitize cells (Click to select)
5. Molds and yeasts (Click to select)
6. Unicellular eukaryotes often described as animal-like
Answer:
BacteriaAlgaeHelminthsVirusFungiProtozoaExplanation:
1) Single-celled prokaryotes are grouped as Bacteria because they do not have the neck ear envelope
2) Single or multi-cellular eukaryotes that photosynthesize to obtain energy are grouped as Algae example : Diatoms and kelps
3) multicellular eukaryotic organisms like parasitic worms are grouped as Helminths because they both infect and depend on their host for food
4) Minute acellular particles that parasitize cells are grouped as Virus and they depend on their host for reproduction
5) Molds and yeasts can be referred to as Fungi . they breakdown organic matters found in dead particles
6) Unicellular eukaryotes often described as animal like are grouped as Protozoa and they connect animals and protists
What are some causes of CO2 levels being higher in some areas than others?
Answer:
human activities for example the burning of fossil fuels in cars or the clearing of forests for agriculture or development
In some areas, human activity is high for burning fossil fuels so these areas create more carbon dioxide.
What are the causes of CO₂ levels?Growing concentrations as a result of human activities including burning fossil fuels in vehicles and power plants, and industrial operations.
Destroying forests for development or cultivation may increase carbon dioxide levels because plants consume CO₂ in photosynthesis and during respiration CO₂ released into the atmosphere.
Plants absorb more carbon dioxide via photosynthesis than they emit through respiration throughout the day or in the spring and summer, the amount of carbon dioxide in the air decreases.
Therefore human activities produce more CO₂ by burning fossil fuels some area level is high than others.
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PLEASE HELP AND EXPLAIN (NO LINKS OR NO RANDOM ANSWERS FOR POINTS)
The reactions of glycolysis that are shared with those in gluconeogenesis (ie use the same enzymes) are those that: Are substrate level phosphorylations Are irreversible. Are regulated steps. Operate close to equilibrium. g
Answer:
The reactions of glycolysis that are shared with those in gluconeogenesis (ie use the same enzymes) are those that Are regulated steps.
Explanation:
Glycolisis and gluconeogenesis are two mechanisms related to the carbohydrates metabolism. Sometimes they are considered reverse processes. However, they are different because of the control points they have where reactions are irreversible.
Glycolisis and gluconeogenesis share 7 common reactions, that are reversible. Thses reactions are coordinated and regulated by F-2 and 6-BP as the answer to the hormonal action.
Glycolisis happens in the muscle, while Gluconeogenesis happens in the liver. Together they form the "Cori Cycle".
what signals the end of the cell cycle
what happens to a animal cell placed in a hypotonic solution
Answer:
If you place an animal or a plant cell in a hypertonic solution, the cell shrinks, because it loses water ( water moves from a higher concentration inside the cell to a lower concentration outside ). ... A single animal cell ( like a red blood cell) placed in a hypotonic solution will fill up with water and then burst.
Explanation:
Hypotonic solution is a solution which, contains lesser solute concentration. If animal and plant cells are kept in a hypotonic solution then endosmosis will occur. Endosmosis is a process in which the water molecules move from outside of the cell of lower solute concentration to the inside of the cell of higher solute concentration through the cell membrane or cell wall. Due to endosmosis, both animal and plant cells will swell.
The moon's relative motion causes
A)
ocean tides.
B)
wind currents.
the phases of the Moon.
D)
the rotation of the Moon.
Answer: the phases of the moon
Explanation: i did it
PSYCH Having a family history involving anxiety disorder, experiencing or witnessing a traumatic event, or having a history of abuse are all __________ of anxiety disorders.
A. common symptoms
B. risk factors
C. causes
D. thinking styles
The answer is B. RISK FACTORS
Having a family history involving anxiety disorder, experiencing or witnessing a traumatic event, or having a record of abuse are all risk factors of anxiety disorders.
Which type of anxiety disorder could be connected to traumatic past events?Post-traumatic stress disorder is a cognitive health disorder that's begun by a scary event either sharing it or witnessing it.
Signs may include flashbacks, demons and severe anxiety, as well as unruly thoughts about the affair.
Thus, option "B" risk factors is correct.
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Biodiversity is highest near the __________.
A. the poles
B. oceans
C. temperate zone
D. equator
Answer:
equator
Explanation:
what bug is this I need to to know.
Answer:
i think beetle bug
Explanation:
the color size dont harm bad
during which time frames was there the greatest rate of change in atmospheric C02 concentration
Answer:
7000 PPM
Explanation:
7000 PPM i'm pretty sure
That’s the right question
Answer:
oh cool
Explanation:
You are tasked with characterizing responses to Epidermal Growth Factor (EGF) treatment of HeLa Cells. You grow HeLa cells then replace the culture media with media containing EGF at various concentrations, then harvest samples for Western blot analysis using an anti-phospho-MAPK antibody as a readout of receptor tyrosine kinase activity. As expected, your control (EGF treated cells) show a strong phopho-MAPK signal on your Western blot. What do you hypothesize will happen if you pre-treat HeLa cells with siRNAs (RNAi) against Ras prior to adding EGF and performing Western blot analysis with anti-phospho-MAPK
Answer:
The answer is "The EGF receptor will be activated but the signal will not be appropriate transduced"
Explanation:
It induces the replication of cell types, especially fibroblasts or epithelial cells. It enhances neuron variety's telling the difference, ripening, and survival. The proinflammatory cytokines of the EGF family are described by four disulfide bonds that confer adhesive properties. The EGF sensor is switched on and the signal is not transmitted correctly.
What do you think of when you hear the word heat?
Answer:
A Fireplace, the desert heat or the song "heat"
Explanation:
Answer:
ice cream and ac, heat comes to my mind as heat wave and those are horrible... they are monsters
Explanation:
Which of the following is the reason in how the anterior pituitary differs from the
posterior pituitary?
O A) the hypothalamus controls the release of posterior pituitary hormones but not the anterior
pituitary
B) the anterior pituitary makes its own hormones; the posterior pituitary releases hypothalamic
hormones
C) the posterior pituitary works independently of the hypothalamus
D) the anterior stores hormones produced by the posterior pituitary
Answer:
B) the anterior pituitary makes its own hormones; the posterior pituitary releases hypothalamic hormones
Explanation:
The pituitary gland is referred to as "master gland" because it coordinates the activities of other endocrine glands. The pituitary gland is composed of two lobes namely: anterior pituitary and posterior pituitary. These two lobes are individually controlled to release several hormones by the HYPOTHALAMUS.
However, one major difference between the anterior and posterior pituitary lobe is that; the posterior pituitary DOES NOT MAKE ITS OWN hormone, hence, releases the hormones (oxytocin and ADH) it stores but produced by the HYPOTHALAMUS. On the other hand, the anterior pituitary PRODUCES ITS OWN hormones but waits for hypothalamic signal to release them.
Question 20 of 34
Which situation shows a nonrenewable resource in use?
A. Solar energy reaches Earth's surface.
B. Sunflowers grow from sunflower seeds.
O c. Computer chips are made from silicon.
D. Lobsters are caught off the coast of Maine.
Answer:
c. Computer chips are made from silicon.
Explanation:
Non-renewable resources are natural substances that cannot be easily replenished when used. Examples are natural gas, coal, oil, nuclear energy, etc. Silicon is made when Silica is heated with carbon after which the product is reacted with hydrocarbons to polymerize them. Since the hydrocarbons are made from oil and natural gas, the resulting product is non-renewable.
Chips made from silicon are not biodegradable because to reuse them, they must be sent to companies that have specialty in renewing them.
WILL GIVE BRAINLINESS PLEASE HELP SO I WONT FAIL
Choose one of the following scenarios and answer the questions provided. Support your answers using scientific reasoning and discussing possible impacts to individuals, society, and the environment. Be sure to also discuss any medical or ethical issues that may apply. (10 points)
Scenario 1:
Genetic engineering can be used to create more productive strains of farm animals. By adding genes to an animal's DNA, the animal can be made to produce milk or meat containing vital nutrients that would not be found naturally in those products. This provides a greater amount of nutrients per serving of milk or meat.
Do you think that this type of genetic engineering should be pursued? Explain your answer. (5 points)
What are some possible impacts (positive and negative) of this type of genetic engineering on individuals, society, and the environment? (5 points)
Scenario 2:
In the future, doctors may be able to evaluate your DNA to check for genetic markers related to specific medical conditions or harmful reactions to medications. Your personalized genetic profile could be kept on record and referred to in order to develop personal medical treatment based on your unique DNA sequencing. Scientists have found that just small variations in a specific section of your DNA can help determine how well some medications can work for you or if they would be beneficial at all.
Would you want to have your DNA profile kept in your medical record as a reference for your doctors? Explain your answer. (2 points)
What are potential pros and cons of having such tests done and referring to DNA sequences when determining a patient's medical treatment? (5 points)
Describe how the availability of this technology might affect the frequency of genetic diseases in individuals and populations. (3 points)
The exchange of gases and other materials between cells in the body and cells in the blood
occurs in...
A. stomach
B. capillaries
C. arteries
D. veins