Answers
Lungs, bronchioles and alveoli are parts of the respiratory system. On the other hand, the mitral valve is one of four valves in the heart that keep blood flowing in the right direction, so it is part of the circulatory system NOT the respiratory system.
Correct answer: mitral valve
Related Questions
Which is NOT a function of the trachea?
a- warm the air's temperature and moistens it as it is inhaled
b- carries air from the nose down toward the lungs while preventing choking
c- assists in the production of sounds when you speak
d- traps debris in mucus which is swept upward towards the nose by cilia
Answers
Answer: A, as that is the job of the nostrils
Food grain are stored in the blank for future use
Answers
Food grains are stored in the warehouse or granary for future use to maintain the production and supply of food in the country and it is also considered as a security measure for the farmers and government agencies.
The grain storage system is important to preserve the nutritional value of the food grains and avoid the losses incurred due to pests, rodents, and other natural calamities such as floods and droughts.
Food grains are the essential components of the human diet, and they need to be stored with utmost care and caution. The quality of food grains plays a crucial role in ensuring the food security of the country. The farmers and the government agencies take care of storing the food grains in the warehouses, which are usually built in the proximity of the grain-producing areas. These warehouses should be equipped with the latest technologies and tools to ensure the safe storage of food grains.
The government also provides subsidies and financial support to the farmers to build their warehouses to store the food grains. The food grain storage system is crucial for ensuring the continuous supply of food and for the survival of the farmers, especially in the developing countries.
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An -ate or -ite at the end of a compound name usually indicates that the compound contains ____.
Select one:
a.
fewer electrons than protons
b.
neutral molecules
c.
only two elements
d.
a polyatomic anion
Answers
Answer:
d. a polyatomic anion
Explanation:
ate and -ite are commonly used for polyatomic ions of Oxygen. - ate is used for the ion that has the largest number of Oxygen atoms. the -ite would be used for the ion with the smaller. NO2 and NO3 are known as Nitrite and Nitrate respectively.
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What assertion can be made about the corpus luteum that is altered upon implantation of the developing embryo
Answers
Answer:
alteration of the corpus luteum results in early pregnancy loss (early embryonic death)
Explanation:
The corpus luteum is a temporary gland structure in the female reproductive system (formed in the ovary that released its ovum), which is involved in the secretion of progesterone hormone and also moderate levels of other hormones, i.e., estradiol and inhibin A. After 7-10 weeks of gestation, this structure (corpus luteum) is replaced by the placenta that produces progesterone throughout the rest of the pregnancy. Normal progesterone levels (i.e., between 10 and 20 ng/ml) are required prior to embryo implantation, thereby alteration of the corpus luteum function will lead to disturbance of maternal recognition of pregnancy because pregnancy does not occur until the fertilized egg implants into the uterus.
What is the biggest error, methodologically, in the following scientific study? "The goal of the study was to determine whether the ebola virus is as deadly in rhesus monkeys as it is in gorillas. I took a sample of four healthy rhesus monkeys and four healthy gorillas. The animals were a random mixture of sexes and ages. I arranged eight cages so that each animal would be in a separate cage, and I made sure there would be no contact among the cages that would allow transmission of the virus. Then I obtained a sample of the ebola virus from the National Institute of Infectious Diseases and injected all the monkeys and gorillas with the same size dose. At the end of four days, I noticed that all the gorillas were dead but only one of the monkeys was dead. An autopsy revealed that three of the four gorillas had died of ebola fever but that the fourth, nicknamed Curious George, had died of internal bleeding after swallowing the small pair of scissors that were left within reach of its cage. The dead monkey had died of ebola fever. At the end of two months there were no more deaths. I concluded that my dosage of the ebola virus is three times as likely to be deadly to gorillas as it is to rhesus monkeys, but I recommended repeating the study to see if the percentages of deaths due to ebola fever remained steady over a wide range of dosages of the virus."
Answers
Answer:
The sample obtained for the study is not enough. Also, a control group is not established thus making the study erroneous.
Explanation:
The total sample size of 4 specimens from each of the two groups does not qualify as an appropriate sample size for the generalization of the results. Furthermore, the mixing of different ages and genders is not suitable for this kind of sample.
Also, the control group is not established where healthy specimens are kept in a similar environment to factor out the effects of the environment and other components on the health/death of the animals.
why are mutations considered important in evolution
Answers
Mutations are considered important in evolution because they are the ultimate source of genetic diversity.
Mutations are alterations in the sequence of an organism's DNA, caused by radiation or toxins in the environment. They can also form spontaneously during DNA replication.Mutations can have a variety of impacts. These are frequently dangerous or have little or no impact. However, changes in DNA sequence can occasionally be helpful to the organism.Beneficial mutations that offer a survival benefit or reproductive success are more likely to be passed on to subsequent generations, increasing their frequency in the population over time. This accumulation of favorable mutations is a driving factor in the process of evolution.Without mutations, there would be no supply of new genetic information, and evolution would be greatly hampered.
Answer:
Mutations are one of the fundamental forces of evolution because they fuel the variability in populations and thus enable evolutionary change.
Question 2
Now collect your data, starting with your resting pulse rate. Follow these steps, and write your results in
the table.
1. Sit as still as possible for 10 minutes, and then measure your pulse for 10 seconds. Repeat this test
two more times.
2. For each trial, multiply the measure by 6 to find the number of beats per minute.
3. Take an average of the three values to get an average resting pulse rate per minute.
BIY X¹ X₂ 10pt
AVE
Trial 1
Trial 2
Trial 3
Beats Counted in 10 Seconds
Beats per Minute
Average:
Answers
The average resting pulse rate is 72.0 beats per minute.
BIY X¹ X₂ 10ptAVE Trial 1 Trial 2 Trial 3 Beats Counted in 10 seconds 12 11 13 Beats per Minute 72 66 78 Average 72.0+66.0+78.03=216.0/3=72.0The given table displays the resting pulse rate data for a person.
In order to find the average resting pulse rate, follow these steps:1. Sit as still as possible for 10 minutes, and then measure your pulse for 10 seconds. Repeat this test two more times.
2. For each trial, multiply the measure by 6 to find the number of beats per minute.
3. Take an average of the three values to get an average resting pulse rate per minute.
The average resting pulse rate can be calculated by summing up the three trial pulse rate readings and then dividing the sum by three as shown below. Average = 72.0+66.0+78.0/3=216.0/3= 72.0.
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look at the picture
Answers
Answer:
D.
Explanation:
This is related to the moons pull on the ocean more though,
Answer:
I am not 100% sure, but I'm guessing it is the last option
Explanation:
This is because, in the experiment the air is interacting with the water and the only option which shows air (atmosphere) interacting with water (hydrosphere) is the last option.
Hope it helps!
how do you find per capita growth rate over a month?
Answers
All you have to do is take the CGR (capita growth rate) percentage you just found and divide it by the number of years, months, etc. The complete formula for annual per capita growth rate is: ((G / N) * 100) / t, where t is the number of years.
what usually accompanies a cold spell in minnesota?
Answers
It is estimated that the world human population reached 3 billion people in 1959 and 6 billion in 1999. Assuming a carrying capacity of 16 billion humans, write and solve the differential equation for Gompertz growth, and determine what year the population reached 7 billion. Was logistic growth or Gompertz growth more accurate, considering world population reached 7 billion on October 31,2011
Answers
Answer:
i ) Gompertz equation :
\(\frac{dP(t)}{dt} = \alpha In ( \frac{K}{P(t)} )P(t)\)
ii) The year that population reaches 7 billion is 2013
iii) The logistic growth was more accurate
Explanation:
i) write and solve the differential equation for Gompertz growth
Gompertz equation :
\(\frac{dP(t)}{dt} = \alpha In ( \frac{K}{P(t)} )P(t)\)
∝ = growth rate
k ( carrying capacity ) = 16 * 10^9
P(t) = population at time t
ii) Determine what year the population reached 7 billion
The year that population reaches 7 billion is 2013
solution attached below
iii) Determine if logistic growth or Gompertz growth was more accurate considering world population reached 7 billion on October 31,2011
The logistic growth was more accurate because the when Logistic growth model was used, the year in which the population reached 7 billion was 2010 and this value is more closer to 7 billion on October 31 2011 ( given value )
How can the enzyme activity be slowed down?
A. Increase temperature from 10*C to 20*C
B. Increase temperature from 20*C to 30*C
C. Decrease the temperature from 30*C to 20*C
Answers
A plant that has round seeds is crossed with one that has wrinkled seeds. The offspring had half round seeds and half wrinkled seeds. What were the genotypes of the parents?
A plant that has round seeds is crossed with one that has wrinkled seeds. The offspring had half round seeds and half wrinkled seeds. What were the genotypes of the parents?
Rr x Rr
RR x rr
Rr x rr
RR x Rr
Answers
Answer:
2nd one
Explanation:
I believe this is correct. rr is a recessive homozygous.
Which statement best explains the importance of resource economics? 1. It details the costs of mining processes. 2. It provides fresh water to all areas of the world. 3. It examines the cost and profits of resource use. 4. It sets consistent prices to achieve sustainability.
I need help
Answers
Resource economics is a discipline that examines how societies employ their limited resources. The primary purpose of resource economics is to analyze how resources are developed, utilized, and depleted over time.
In general, the study is concerned with the optimal use of resources in a way that maintains or increases the well-being of people over time.The following statement best explains the importance of resource economics: It examines the cost and profits of resource use. According to resource economics, the optimal use of resources is obtained when the cost of producing and distributing goods is at the lowest possible level, while still guaranteeing that the goods and services are of high quality.
In order to achieve this, resource economics analyses the cost and benefits of resource use, and offers insight into how society can make the most efficient use of its limited resources. Therefore, this statement is the most appropriate, since it clarifies that resource economics is concerned with analyzing the cost and profits of resource use, which is necessary for any community to use its resources in a way that is both sustainable and profitable. Resource economics examines how resources are utilized and depleted over time, with the aim of maintaining or increasing the well-being of people over time.
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__________ law, which helps explain the critical closing pressure, states that the force that stretches the vascular wall is proportional to the diameter of the vessel times the blood pressure.
Answers
Answer:
Laplace law
Explanation:
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in plants water is transported through?
Answers
Answer:
Water is sucked up xylem by mass flow (cohesion-tension) which decreases the water potential in the root xylem. So water diffuses through the root cells to the xylem which decreases the water potential in the root epidermis cells, so water diffuses into root hair cells from soil by osmosis.
Explanation:
A scientist wants to study how the body uses foods and fluids during a marathon run.This scientist is most likely a
Answers
Answer:
exercise physiologist
A scientist wants to study how the body uses foods and fluids during a marathon run. This scientist is most likely a physiologist.
Who is a physiologist?Physiologists are trained doctors who study the organs and their relationship at the molecular and cellular levels. The working of different organs and different systems of the body are studied by physiologists.
These doctors have master’s degrees or specialized degree programs, but they are not real doctors. They work with doctors and study the various interaction of systems.
They usually work with people whose body is not functioning properly or with athletes and gym-going people. Furthermore, they work with the stiffness of the body or food that is necessary.
Thus, the scientist is most likely a physiologist.
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1. Riley and Casey have been dating for about 6 months. Riley tells Casey
how much they love to be alone together. Whenever Casey is around
Riley's friends, Riley makes fun of Casey. Riley also gets upset with Casey
when friends talk with Casey, accusing Casey of flirting with their friends.
This is an example of an abusive relationship.
A. True
B. False
Answers
Answer:
True
Explanation:
In a good relationship you shouldn't make fun of you significant other or get upset if they want to spend time with their friends.
Yes, it is an example of an abusive relationship. One should not make fun of his or her partner.
What is an abusive relationship?An abusive relationship is in which any person is abusive with his or her partners.
It can be a threat, or physical or mental abuse.
Always insulting and making fun is also an abusive relationship.
Riley and Casey are in an abusive relationship according to the given circumstances.
Thus, Yes, it is an example of an abusive relationship. One should not make fun of his or her partner.
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When fewer visual pigment molecules are available to absorb light (for example, when a person has a color weakness), which of the following nervous system responses occurs? A.Fewer signals of the weakly perceived color are sent to the brain. B.A normal number of signals of the weakly perceived color is sent to the brain, but each signal is less intense. C.The signals for the weakly perceived color are sent to the brain via other, more plentiful, pigments. D.Light molecules stimulate the cells to make additional pigment.
Answers
Answer:
A.Fewer signals of the weakly perceived color are sent to the brain.
Explanation: the brain is the seat of nervous coordination where nerve cells sends signals for processing. An individual with a weak color means a fewer signal for color production is sent to the brain this is due to low pigment it had hence fewer pigment molecule are available to absorb light. If the pigment is high the signal sent will also be high.
when did human activity affect a few species and cause them to trophic cascade
Answers
Human activity has caused trophic cascades in several species, with one notable example being the reintroduction of gray wolves to Yellowstone National Park in 1995.
Prior to their reintroduction, the park's ecosystem had suffered due to the absence of wolves, as their absence had allowed the elk population to grow unchecked, resulting in overgrazing of vegetation and a decline in biodiversity.
Once the wolves were reintroduced, they began to prey on the elk, which reduced the elk population and allowed vegetation to recover. As a result, the habitat of other species, such as beavers, songbirds, and even fish, improved, as they were able to utilize the newly regenerated vegetation.
This is a classic example of a trophic cascade, where the removal or addition of one species can have a cascading effect on the rest of the ecosystem.
Human activities such as hunting, deforestation, and pollution have disrupted many ecosystems, causing trophic cascades that can have far-reaching consequences for biodiversity and ecosystem functioning.
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The complete question is:
When did human activity affect a few species and cause them to trophic cascade?
Which two features are parts of a line graph
Answers
Answer:
A dependent variable and an x-axis
Explanation:
In 1915, the scientist Thomas Hunt Morgan discovered that certain genes on chromosomes are associated with specific traits in fruit flies. However, the mechanism through which this process occurs was not detailed until 1966. That is when Marshall Nirenberg and several other scientists demonstrated that specific sequences of nucleotides in DNA correspond to specific proteins. After gene sequencing was introduced in 1977, scientists were able to use Nirenberg's discoveries to predict an organism's proteins from its DNA sequences.
How does the information above illustrate the nature of science?
A.
It shows that scientific progress is made primarily through observational rather than experimental evidence.
B.
It shows that earlier scientific ideas are typically incorrect since genes code for proteins and not traits.
C.
It shows that scientific ideas are durable but are developed as new data are collected.
D.
It shows that scientists like Nirenberg did not rely on ideas of others in making major discoveries.
Answers
a gorilla is an example of a producer, consumer, or decomposer?
Answers
Answer:
It would be A or B. I'd go with B.A gorilla is both a Producer and Consumer, since it can produce kids, and it can eat.
Which organism would not be found in the domain Eukarya?
.a shark
.E. coli
.a dandelion
.a mushroom
Answers
Answer:
It would be E.Coli because its a kind of bacteria. Eukaryotes are organisms whose cells have a nucleus enclosed within a nuclear envelope. So in this case E.Coli would be the answer.
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If a person has the values for an object's density and volume, what value can be calculated?
Answers
Answer:
So B.
Explanation:
if you had values for ρ and volume , you could assess the mass of the object by taking the product: Mass=volume×density .
What groups of animals are heterotrophs?
a.) het vores
b.) carnivores
c.) omnivores
d.) all the above
Answers
Answer:
I would say d.) all of the above but I dont know what a het vore is
what is one rock from the mars
Answers
Answer:
The martian crust is made mostly of basaltic igneous rock composed mostly of feldspar and pyroxene.
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Why do sex-linked traits follow different patterns of inheratance than other traits
Answers
Answer:
Males and females have different sex chromosomes.
Explanation:
Sex Linked trait is controlled by the chromosomes while other traits are controlled by autosomes. The autosomal cells and traits have a constant characteristics in a human being. The chromosomal cells however vary. The male chromosome XY is different from the female chromosome XX.
This is the reason why sex-linked traits follow different patterns of inheratance than other traits as a result of the Males and females having different sex chromosomes is valid.
Math help me please it will help me
Answers
what are osteoblasts and osteoclasts? Describe how these cells work together in a healthy person. What can occur if these processes are unbalanced?
Answers
Answer:
Osteoblast and osteoclast are the two main cells participating in those progresses (Matsuo and Irie, 2008). Osteoclasts are responsible for aged bone resorption and osteoblasts are responsible for new bone formation (Matsuoka et al., 2014). The resorption and formation is in stable at physiological conditions.Answer:
Osteoclasts are cells that dissolve bone and osteoblasts are cells that form new bones.The building up and breaking down of the bone tissue aids in strengthening bones. If bone destruction by osteoclasts happens faster than new bone tissue is built by osteoblasts, this can cause problems for a person.