1. Which of the following compounds in the main group is an alkaline earth metal?
O A. Sodium
O B. Calcium
C. Silicon
O D. Xenon

Answers

Answer 1

Answer:

B. Calcium

Explanation: short answer

Answer 2

Answer:

Calcium

Explanation:


Related Questions

This mountain slope towers over a town several hundred feet below. Which two weather events present the highest risk to the town

Answers

avalanche or rock slide

functions of the female reproductive organs​

Answers

Are there certain ones you need, like ovaries, vagina, uterus

All of the following are examples of fibrous joints except: ________________

a. tooth within the maxilla
b. skull with the atlas
c. radius with the ulna
d. frontal bone with the parietal bones

Answers

Answer:

a. tooth within the maxilla

Explanation:

Fibrous joints are the type of joints that is connected by fibrous tissue, consist  mainly of collagen. These joints are fixed joints where bones are united by a layer of white fibrous tissue having different thickness. Fibrous joints are present in the neck, in the wrist, knee, hip and at the foot of our body where two bones connect. It does not occur in tooth within the maxilla of human body.

A tetrad is composed of

Answers

Of 2 sister chromatids. Hope this helps


2. What is the longest wavelength?

Answers

Answer:

red

Explanation:

Visible light may be a tiny part of the electromagnetic spectrum, but there are still many variations of wavelengths. We see these variations as colors. On one end of the spectrum is red light, with the longest wavelength. Blue or violet light has the shortest wavelength.

Answer:

red has the longest wavelength.

Explanation:

blue and violet are the shortest

Explain why the definition of a quality life is highly individualized.

Answers

to put it briefly, its because no one likes to struggle. Everyone wants to live comfortable without a worry to the world. when they see someone who has accomplished that state of life, they envy, or admire that person deeply. when you see that new loui bag or gucci belt, you instantly have this desire to own luxury things.

ONE FOOD CHAIN that was affected by the introduction of wolves and model it

Answers

Answer:

Carnivorous

Explanation:

The wolf, also known as the gray wolf or grey wolf, is a large canine native to Eurasia and North America. More than thirty subspecies of Canis lupus have been recognized, and gray wolves, as colloquially understood, comprise non-domestic/feral subspecies.

How many chromosomes do each sex cell have

Answers

[tex] \huge \tt{Hello...!}[/tex]

My Answer

In humans, cells other than human sex cells, are diploid and have 23 pairs of chromosomes. Human sex cells (egg and sperm cells) contain a single set of chromosomes and are known as haploid.

I Hope it's Helps ╮(^▽^)╭

#CarryOnLearning

what is aa?? (in like volcanic terms)

Answers

Answer:

'A'ā (pronounced "ah-ah") is a Hawaiian term for lava flows that have a rough rubbly surface composed of broken lava blocks called clinkers. The incredibly spiny surface of a solidified 'A'ā flow makes walking very difficult and slow.

55 POINTS PLS HELP


One statement is an example of a scientific observation. Another statement is an example of a scientific explanation. Identify the correct statement for each category to illustrate how scientific explanations are inferred from scientific observations.

Cloning has the potential to
significantly benefit a great many
people, so it should not be
considered immoral or risky.

A scientist thinks that he might
find serious inconsistencies in the
fossil record if he conducts an
excavation in a new location.

The rocks present in western Africa
and eastern South America formed
at the same place and at the
same time.

Even if modern organisms are
found in ancient portions of the
fossil record, this wouldn't challenge
the theory of evolution in any way.

The cloning of organisms is an
exciting area of study, and more
resources should be be devoted
to it.

The age, type, and composition of
ancient rocks in western Africa are
nearly identical to the age, type,
and composition of rocks in
eastern South America.

Answers

Answer:

2, 4, and 5 refers to scientific revolution while on the other hand, the remaining statements shows scientific observation.

Explanation:

Cloning has the potential to  significantly benefit a great many  people, so it should not be  considered immoral or risky is refers as scientific observation.

A scientist thinks that he might  find serious inconsistencies in the  fossil record if he conducts an  excavation in a new location is refers scientific explanation because explanation is needed for it.

The rocks present in western Africa  and eastern South America formed  at the same place and at the  same time is scientific observation because the scientists takes the data.

Even if modern organisms are  found in ancient portions of the  fossil record, this wouldn't challenge the theory of evolution in any way is refers to scientific explanation.

The cloning of organisms is an  exciting area of study, and more  resources should be be devoted  to it so it is refers as scientific explanation.

The age, type, and composition of  ancient rocks in western Africa are  nearly identical to the age, type,  and composition of rocks in  eastern South America is scientific observation which is taken by the scientist through research.

Two different enzymes catalyze the same reaction and both exhibit the same Vmax. When Enzyme A was run with a 40 uM substrate, the initial rate (Vo) was 10 uM/min, and when g it was run with a 4 mM substrate, the Vo was 20 uM/min. Estimate the approximate Vmax and Km of Enzyme A. When Enzyme B was run with 80 uM substrate, the initial rate (Vo) was 10 uM per minute. Estimate the Km of Enzyme B.

Answers

Answer:

a) k_m = 4.08 uM

  V_{max} = 20.07 uM/min

b) k_m = 8.16 uM

Explanation:

Given that:

For Enzyme A:

the substrate concentration [S] = 40 uM

the initial velocity rate v = 10 uM/min

when it was 4mM, v = 20 uM/min

i.e.

at 4mM = 4000 uM;

Using Michealis -menten equation;

when v = 10

[tex]V = \dfrac{V_{max}[S]}{k_m+[S]}[/tex]

[tex]10 = \dfrac{V_{max}\times 40}{k_m + 40}[/tex]

[tex]10 (k_m + 40) = V_{max}40[/tex]

[tex]40V_{max} -10k_m = 400 --- (1)[/tex]

when v= 20

[tex]20= \dfrac{V_{max}\times 4000}{k_m + 4000}[/tex]

[tex]20 (k_m + 4000) = V_{max}4000[/tex]

[tex]4000V_{max} -20k_m = 8000 --- (2)[/tex]

equating equation (1) and (2):

[tex]40V_{max} -10k_m = 400 --- (1)[/tex]

[tex]4000V_{max} -20k_m = 8000 --- (2)[/tex]

let multiply equation (1) by 100 and equation (2) by 1

4000V_{max} - 1000K_m = 4000

4000V_{max} - 20 k_m = 8000    

  0        -980k_m = 4000

k_m = 4000/-980

k_m = 4.08 uM

replacing the value of k_m into equation (1)

40{V_max } - 10(4.08) = 400

40{V_max } - 40.8 = 400

40{V_max } = 400 +  40.8

40{V_max } = 440.8

V_{max} = 440.8/40

V_{max} = 11.02 uM/min

b)

Since V_{max} of A ie equivalent to that of B; then:

V_{max} of B = 11.02 uM/min

Here;

[S] = 80  uM

V = 10 uM/min

[tex]10 = \dfrac{11.02 \times 80}{k_m + 80 }[/tex]

10(k_m +80) = 881.6

10k_m = 881.6  - 800

10k_m = 81.6

k_m = 81.6/10

k_m = 8.16 uM

which definition best describes a buffer?

Answers

Answer:

where are the options

Explanation:

A buffer is a solution that resists changes in pH upon the addition of a small amount of strong acid or strong base. ... A buffer is composed of a mixture·of a weak acid its conjugate base. (Sometimes a solution that is technically a buffer does NOT resist changes in pH.

How is the equilibrium of an ecosystem maintained?

Answers

Answer:

Biodiversity provide stability to the ecosystem and maintains the ecological balance. Plants and animals in ecosystem are linked to each other through food chain and food web. The loss of one species in the ecosystem affects the survival of other species. Thus the ecosystem becomes fragile

Explanation:

.

High blood pressure may lead to strokes and heart attacks and is a risk factor that may be changed by taking medication?

Answers

Answer:

Yes

Explanation:

High blood pressure can be redused, but can't stop permanently.

yes it can be… wjdhsjdjsjsjjwjssjnxns

Question 11
Plasmids are located
in the nucleus
continuous with the nuclear envelope
in the cytoplasm
in the nucleolus

Answers

Answer: eurkayotic cells

Explanation:

Birds differ from their closest relatives, the reptiles, in what ways?
(choose all that apply)
the bones of reptiles are too lightweight to permit flight
birds are capable of powered flight, while some reptiles can glide
birds have feathers, reptiles have scales
only the birds lay eggs on land; the reptiles can only lay their eggs in water
the reptiles have a series of internal air sacs that allow a very efficient extraction of oxygen
birds are endothermic, while reptiles are generally ectothermic
1 pts

Answers

Answer:

birds have feathers, reptiles have scales

birds are endothermic, while reptiles are generally ectothermic

Explanation:

The main difference between birds and reptiles  is that birds have feathers on their body while on the other hand, reptiles ahve dry skin and have scales. Reptiles are ectotherms, while birds are endotherms. An ectotherm relies on its external environment to regulate the temperature of its body whereas Endotherms are able to regulate their body temperatures by producing heat within the body.

what is length?Name any two devices used for measuring the length.​

Answers

Answer:

the size of something from one end to the other; how long something is

Running race tracktree

Answer:

A length is how long something is.

ruler

Measuring tape.

Describe the biome in which you currently live, or one in which you want to live, or have lived. What are the atmospheric conditions (wind pattern, humidity level, etc), solar intensity, and geographic/oceanographic features that have produced this unique ecosystem

Answers

Answer:

Southern Texas

Explanation:

The Wind pattern often is represented by the westerlies, which are the winds that flow in the northern latitude of the world. The humidity level in this zone varies from 10-20%, since we are in the desert we do not have much humidity, the solar intensity is high, often found in the 9-10 uv range, it is not advised to spend more than 10 minutes on direct sun without solar protection.  We have the Rio Grande to the south and some spare mountains.

Answer:

Southern Texas

Explanation:

Pharmacological management of glaucoma focuses on the reduction of intraocular pressure by increasing the drainage of aqueous humor, decreasing the production, or both. What drug classes are used to reduce intraocular pressure

Answers

Answer:

Beta blockers.

Explanation:

Beta blockers are the drugs that blocks the effects of the hormone adrenaline. Beta blockers is responsible for slowing of your heart beat more which ultimately reduce blood pressure. Beta blockers  are the drugs which reduce the production of fluid in your eye, thereby lowering the pressure in your eye means intraocular pressure. Examples of beta blocker medicines are timolol (Betimol, Istalol, Timoptic) and betaxolol (Betoptic).

Pistil is the male reproductive part of the plant.




True or false?

Answers

Answer:

false bestie, that's a women's

Answer:

false

Explanation:

The bacterium Salmonella enterica can cause severe food poisoning and the lining of the alimentary canal may be damaged. In these cases absorption of digested food products cannot easily take place. Which region of the alimentary canal is most affected?
A colon B ileum C oesophagus D stomach​

Answers

The duodenum is largely responsible for the continuing breakdown process, with the jejunum and ileum being mainly responsible for absorption of nutrients into the bloodstream. Subsequently the waste moves into the large intestine (large bowel or colon) for excretion through anus

What is the result of a mutation during meiosis

Answers

The result of Mutation increases during meiosis is the answer to this question

Answer:

There's a change in the DNA sequence

Explanation:

If a mutation occurs in cells that will make gametes by meiosis or during meiosis itself, it can be passed on to offspring and contribute to genetic variability of the population. Mutations are the sole source of genetic variability that can occur in asexual reproduction. But the effects of mutations can vary widely, from being beneficial, to having no effect, to having lethal consequences, and every possibility in between.

__________ 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:

Have a nice day :)

•. What is the phenotypic ratio of complementary gene?
a) 1:2:1
b) 9:7
c) 13:3
d) 9:3:3:1​

Answers

I think the answer is b

which characteristic of water allows it to absorb large amounts of energy without a large rise in temperature

Answers

Answer:

Specific heat capacity

Explanation:

Determine whether each statement describes mitosis, melosis, or both mitosis and melosis.

Answers

Answer:

This question is incomplete as it lacks statements, the statements and the answers are as follows:

occurs in organisms that sexually reproduce - MEIOSIS

occurs during growth and development - MITOSIS

the DNA is replicated - MITOSIS AND MEIOSIS

occurs in all organisms - MITOSIS

the number of chromosomes remains the same - MITOSIS

the number of chromosomes reduces by half - MEIOSIS

Explanation:

Meiosis and mitosis are both types of cellular divisions that occur in living cells. Mitosis involves the formation of two (2) daughter cells that are genetically identical to the parent cell while meiosis involves the formation of four (4) daughter cells that are genetically different from the parent cell.

The following are characteristics of the two division processes based on this question:

MITOSIS:

- It occurs during growth and development of an organism.

- it involves DNA replication

- it occurs in all organisms since every living organism undergoes growth and development.

- the number of chromosomes after mitosis remains the same in the daughter cell i.e. 2n remains 2n

MEIOSIS:

- It occurs only in organisms that sexually reproduce.

- it also involves the replication of DNA

- The number of chromosomes in the daughter cells is reduced by half i.e. 2n to n.

The oxidase test is another biochemical test used to distinguish aerobic versus anaerobic metabolism in microbes. Research the oxidase test and describe how it is performed. Include examples of oxidase-positive and oxidase-negative microbes in your answer.

Answers

The Bacillus genus is usually negative in regards for the Oxidase test.

Oxidase test is a biochemical test that is used to identify organisms that produce the enzyme  oxidase.

Oxidase test is used to distinguish aerobic from anaerobic metabolism in microbes.

Aerobic metabolism is the use of oxygen to generate energy from a food source while anaerobic metabolism is the generation of energy with the absence of oxygen.

The procedure of oxidase test includes:

Place a piece of filter paper in a clean petri dish and add 2 or 3 drops of freshly prepared oxidase reagent.Using a piece of stick or glass rod (not anoxidized wire loop), remove a colony of the test organism and smear it on the filter paper.Look for the development of a blue-purplecolour within a few seconds as shown in colour

Blue purple colour signifies oxidase positive organisms which includes Pseudomonas aeruginosa

Colourless signifies oxidase negative organisms which includes Escherichia coli

Learn more here:

https://brainly.com/question/4680704

What is the 'processor of thermoregulation that determines if a change in
body temperature is needed?
A. Thyroid
B. Pancreas
C. Kidneys
D. Hypothalamus

Answers

Answer:

D) Hypothalamus

Explanation:

1. Deciduous trees lose their leaves seasonally and include trees such as cedar and maple.

a. True
b. False

2. Hardwoods reproduce using flowers and have broad leaves; hardwoods include trees such as mango, elm, and pine.
a. True
b. False

3. Conifer leaves are generally thin and needle-like, while seeds are contained in cones. Conifers include pine and elm.
a. True
b. False

4. Evergreens are plants that maintain their leaves in all seasons and include trees such as cedar, mango, and pine.'
a. True
b. False

Answers

1.True
2.True
3.False
4.False
Are the answers to this questions

Factors determine energy a human being requires in a day

Answers

Human energy requirements are estimated from measures of energy expenditure plus the additional energy needs for growth, pregnancy and lactation. Recommendations for dietary energy intake from food must satisfy these requirements for the attainment and maintenance of optimal health, physiological function and well-being. The latter (i.e. well-being) depends not only on health, but also on the ability to satisfy the demands imposed by society and the environment, as well as all the other energy-demanding activities that fulfil individual needs.

Energy balance is achieved when input (i.e. dietary energy intake) is equal to output (i.e. total energy expenditure), plus the energy cost of growth in childhood and pregnancy, or the energy cost to produce milk during lactation. When energy balance is maintained over a prolonged period, an individual is considered to be in a steady state. This can include short periods during which the day-to-day balance between intake and expenditure does not occur. An optimal steady state is achieved when energy intake compensates for total energy expenditure and allows for adequate growth in children, and pregnancy and lactation in women, without imposing metabolic, physiological or behavioural restrictions that limit the full expression of a person’s biological, social and economic potential.

Within certain limits, humans can adapt to transient or enduring changes in energy intake through possible physiological and behavioural responses related to energy expenditure and/or changes in growth. Energy balance is maintained, and a new steady state is then achieved. However, adjustments to low or high energy intakes may sometimes entail biological and behavioural penalties, such as reduced growth velocity, loss of lean body mass, excessive accumulation of body fat, increased risk of disease, forced rest periods, and physical or social limitations in performing certain activities and tasks. Some of these adjustments are important and may even increase the chances of survival in times of food scarcity.
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6. Unscrambled the The sentence belownever found out I of the story end the. Houston Fashions is considering a new product line that would require an investment of $ 140,000 in fixtures and displays and $ 180,000 in working capital. Store managers expect the following pattern of net cash inflows from the new product line over the life of the investment.Year Amount1 ......... $70,0002 ......... 78,0003 ......... 72,0004 ......... 56,0005 ......... 50,0006 ......... 48,0007 ......... 44,000a. Compute the payback period for the proposed new product line. Houston Fashions requires a four- year pre-tax payback period on its investments. (Round to one decimal point.) Should the company make this investment? Explain.b. Should Houston Fashions use any other capital project evaluation method(s) before making an investment decision? Explain. Early travelers described ancient Ghana as complex civilization with a heavy Islamic and traditional West African culture. Justify this statement with reference to religion and language. QUICK I ONLY HAVE 5 MINS LEFT Which 3 organisms feed on dead matter and waste products?EarthwormLadybugFungiMiceBacteria How do you reset a g.mail password? help meeeeeeeeeeeeeeeeeeeee!!!!!!!!!!!!plssssssssssss Briefly describe two ways in which an agent could have benefitted from selling sugar for big planters? Markerlaanariant What is the equation of the following line written in slope-intercept form? Evaluate F(x) = x^2 + 1 for f(-1) 1.1 Define the concept risky behaviour? Write a polynomial that represents the area of the above football field. Please help me on this!! 11 points!!! Khi no sa dng th present simple Intra-industry trade between similar trading partners allows the gains from ______________________ that arise when firms and workers specialize in the production of a certain product. a. comparative advantage b. learning and innovation c. creating the value chain d. relative advantage Police response time to an emergency call is the difference between the time the call is first received by the dispatcher and the time a patrol car radios that it has arrived at the scene. Over a long period of time, it has been determined that the police response time has a normal distribution with a mean of 8.1 minutes and a standard deviation of 2.0 minutes. For a randomly received emergency call, find the following probabilities.a. between 5 and 10 minb. less than 5 minc. more than 10 min What other information is needed to prove that FGE ~ IJH by the SAS similarity theorem?F JI FE HG Icters have to get out of. All the sentences have one mistake. Rewrite them correctly.She can to drive. Describe an important difference in the way an economist and a businessperson might view a monopoly. When you are standing without moving, you exert a force on the ground. Why doesn't Earth slowly start accelerating downwards? The answer to this question is D as it says in the answer sheet of the question paper but how?