Alkali metals and the alkaline earth metals are the elements which are very reactive member of the groups of elements which are mentioned above. Thus, the correct option is B.
What are Alkali metals?All alkali metals are the metals which show a silver-like luster, which makes them appear shiny on the outer side. They are highly ductile metals and can conduct electricity without any trouble as these are the good conductors of heat and electricity. All alkali metals have a very low melting point and the alloys of such alkali metals can display even more lower melting points than that of usual metals and elements.
Alkali metals belong to Group 1 (Ia) of the periodic table, including elements such as, lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr) elements. The alkali metals are so called because of their reaction with water results into formation of alkalies, which are the strong bases capable of neutralizing acids.
Therefore, the correct option is B.
Learn more about Alkali metals here:
https://brainly.com/question/18153051
#SPJ6
plzzzzz helppppp!!.......
Human curiosity and creativity have led to improvements in technology.
How have advances in technology affected scientists?
They have helped them develop logical hypotheses.
They have allowed them to prove their theories true.
They have allowed them to make more observations.
They have allowed them to think more critically.
Answer:
C. they have allowed them to make more observations
Explanation:
Human curiosity and creativity have led to improvements in technology. these advances in technology allowed scientists to think more critically. Thus, Option D is correct.
What is critical thinking ?Critical thinking is nothing but an analytical mode of thinking about any subject or problem based on logic, rationality, and synthesis.
By using this style of thinking a thinker can upgrade his quality of thinking, become intuitive.
In science, everyone must be cultivated with this practice by delving and asking questionaries' like where is the evidence?, what is reason behind? why is it so? etc.
Hence these attributes can be learnt through practice to become a critical thinker.
To become a critical thinker, some basic steps should be followed such as clarify the purpose, ask question, analyze by arguments, evaluate the result of arguments, synthesize or conclude from that arguments.
Hence, Option D is correct.
Learn more critical thinking, here:
https://brainly.com/question/12980631
#SPJ2
Someone please help me
Question: The organism shown is called Chlamydomonas. What domain does it belong to? Look at the parts. What do they tell you about this kind of organism?
Answer:
it belongs to the Eukarya domain
Explanation:
it has both plant and animal characteristics
Active transport occurs through which type of biomolecule?
Proteins
Lipids
Carbohydrates
Nucleic acids
Nucleic acids. It is this becasue In my science call today they said this
Natural selection acts on a population to produce individual organisms with different adaptations. Which is true about these adaptations? A)These adaptations are designed so every organism will be perfectly adapted to its environment B)The usefulness of these adaptations is tested by interactions in the surrounding environment. C)These adaptations are useful to every organism and their descendants in the any environment D)The usefulness of these adaptations is reduced by interactions in the surrounding environment
Answer:
a
Explanation:
will osmosis occur?
if so which direction?
The solution in the berzelius glass has a concentration of 50%, the other solution has a concentration of 30%. In osmosis water moves from the solution with a lower concentration to the solution with the higher concentration. Therefore, water will move from the 5%glucose,25%starch solution to the 20%glucose, 20%K⁺,10% iodine.
HELP!!!!!!!!!!!! IM BOUT A PLANT
Answer:
3
Explanation:
That is the nucleus
Answer:
3
Explanation:
A beaker of with 115 mL of solution has a temperature of 21 °C. The solution contains 5 g of salt and 115 mL of water. Students added two ice cubes to the solution and stirred the solution with a stirring rod. Which properties of the solution changed as the ice cubes melted?
Answer:
Properties of the solution which changed
1. The temperature of the solution
2. The concentration of the solution
Explanation:
The properties of the solution that changed are:
1. The temperature of the solution: Once the ice cubes were added, (we will assume that the ice cubes were at 0 degrees Celcius) The system had to attain thermal equilibrium. Hence, the higher temperature of the solution melted the ice, while the ice, cooled the entire mixture.
2. The concentration of the solution reduced. We need to remember that ice is water. As the ice was added, we were indirectly adding more water to teh solution, thus diluting its concentration
Help ASAP
Multiple choice.
The survival of a species depends on its ability to adapt to changes in the environment. A species must be capable of surviving and reproducing despite changes to food sources, climate, or threats from predators. Which statement correctly describes a way that mutations increase the likelihood that a species will survive in a changing environment?
A. Mutations are a source of variation in the species.
B. Mutations are the cause of disease in the species.
C. Mutations are not harmful when they occur in somatic cells of the species.
D. Mutations are always passed on to subsequent generations of the species.
Answer:
A
Explanation:
A. when there is a variation or mutation there might be the chance that they develop a way to eat plants that they normally would not be able to. If and when they survive they reproduce passing on the genes to there offspring and so on. if the mutation is bad then the animal will die therefore not passing on there genes.
The statement 'mutations are a source of variation in the species' correctly describes a way that mutations increases the likelihood that a species will survive in a changing environment (Option A).
Mutations are any alteration in the genetic material (nucleotide sequence) of the genome of an organism.Mutations can be beneficial, deleterious or neutral depending on the environmental conditions in which the individual suffering the mutation lives.Germinal mutations (i.e., mutations in the gamete cells) can be passed to offspring and thus increase the genetic variation of the species and/or population in which these mutations appear.In conclusion, the statement 'mutations are a source of variation in the species' correctly describes a way that mutations increases the likelihood that a species will survive in a changing environment (Option A).
Learn more in:
https://brainly.com/question/10473763
During the gestational period, vital nutrients are absorbed by the digestive system and delivered to the placenta by the circulatory system. The embryo then benefits from these nutrients which are absorbed from the placenta through the umbilical cord. This demonstrates the digestive and circulatory system interacting with the _____ Reproductive system Endocrine system Respiratory system Integumentary system
Answer:
reproductive system I think
Explanation:
.
This demonstrates the digestive and circulatory system interacting with the
Reproductive system.
During gestational period, there is the formation of the embryo as a result of
the fusion of the male and female sex cells. This is implanted in the womb
with the aid of the placenta.
The placenta absorbs the nutrient gotten as a result of its metabolism and
flow by the digestive and circulatory system respectively.
This demonstrates the digestive and circulatory system interacting with the
Reproductive system to ensure the embryo are given the needed nutrients
for its growth and survival.
Read more on https://brainly.com/question/20185500
What are mutations, and how can they affect proteins?
Answer:
A mutation is a change in a DNA sequence.
A mutation can cause the protein to malfunction or to be missing entirely.
I hope it helps.
Mutations are permanent changes in the DNA sequence of a gene. Mutations can affect the shape of the protein that is produced. A change in the shape of the protein can affect the function of the protein, which may affect the trait that is seen.
what happened to the blood glucose rate of an individual when working out?
Answer:
Physical activity can lower your blood sugar up to 24 hours or more after your workout by making your body more sensitive to insulin. Become familiar with how your blood sugar responds to exercise. Checking your blood sugar level more often before and after exercise can help you see the benefits of activity.
Explanation:
iiiiiiPLEASE HELP!!!!!
Worldwide, about twice as many people eat a plant-based diet as eat a meat-based diet. A plant-based diet requires fewer resources to produce. It takes 28 calories of fossil-fuel energy to produce 1 calorie of protein from meat. In contrast, it takes only 3.3 calories of fossil-fuel energy to produce 1 calorie of protein from grain. With the population continuing to increase, some people believe it may be necessary to give up meat-based diets to ensure that there are enough resources to produce food for all people.
Do you think that a plant-based or a meat-based diet is more nutritious, or are they both equally nutritious? Why does a plant-based diet require fewer resources to produce? Do you think people should eat less meat? Why or why not
Answer:
A plant based diet is clearly more nutritious. In fact, all protein orginates in plants. This is because it does not contain cholestrol, has very little amounts of fat, and is the only source of fiber. The science also bears this out. A plant based diet requires less recourses because it does not require the feeing of animals. The grain, fruit, vegtables, etc. goes directly to huaman, rather than being given to a imprisoned animals first. People should not only eat less meat, the should eat no meat. This is due to the three pillars of veganism. Ethics, envirnonment, and health. It is unethical to keep a animal in a cage it's short life and murder it. It is not envronmentally safe to raise trillions of animals a year all of whom produce methane, which is 16x more potent than CO2. And for health. It is increadable unhealthy to eat animal products. T. Colin Campbell has found a connection between cancer and dairy. Dr. Caldwell Esselstyn has found a undeinable link to heart disease. There are may more connections like this, which are very clear in their message: Humans can not handle the saturated fat, HEME iron, cholestrol, sugars, inflammatory substances, and everything else that comes with eating animals. Humans basic biology says we should not eat meat. We cannot murder animals with the tools that nature gave us.
Explanation:
Answer:
I think that both diets are equally nutritious, but I also think that people should eat less meat. I think that a plant based diet does require fewer resources, and It also requires more fossil-fuel energy to create one calorie of protein from meat then it does to create one calorie of protein from grain. If we switch to plant based diets, we could conserve resources, which might be good since the population is going up and resources are declining.
HELP
What is a hydrogen bond?
Answer:
A hydrogen bond is a weak bond between two molecules resulting from an electrostatic attraction between a proton in one molecule and an electronegative atom in the other.
will make brainliest help asap
Human blood type is
determined by multiple alleles (A, B, and o) Which ratio would result from a cross between a man with heterozygous Type A blood and a woman with Type O blood?
50% Type A 50% Type O
50% Type AB 50% Type O
100% Type A
100% Type O
Answer:
Explanation:
1st one
Answer:
In this problem, there is no uncertainty abt the genotype of either parent. A parent of blood type AB has the co-dominant IA and IB alleles. A parent of blood type O is homózygous recessive for the i allele.
The Punnett square for their offspring is shown to the right. The genotypes of their offspring could be either IAi or IBi. Their children could be in blood groups A or B, but not AB or O.
Explanation:
Most-likely the third one.
Why would horses from North America settle in southern Russia?
Are wild horses truly “wild,” as an indigenous species in North America, or are they “feral weeds”—barnyard escapees, far removed genetically from their prehistoric ancestors? The question at hand is, therefore, whether or not modern horses, Equus caballus, should be considered native wildlife.
The question is legitimate, and the answer important. In North America, the wild horse is often labeled as a non-native, or even an exotic species, by most federal or state agencies dealing with wildlife management, such as the National Park Service, US Fish and Wildlife Service, and the Bureau of Land Management. The legal mandate for many of these agencies is to protect native wildlife and prevent non-native species from causing harmful effects on the general ecology of the land. Thus, management is often directed at total eradication, or at least minimal numbers. If the idea that wild horses were, indeed, native wildlife, a great many current management approaches might be compromised. Thus, the rationale for examining this proposition, that the horse is a native or non-native species, is significant.
The genus Equus, which includes modern horses, zebras, and asses, is the only surviving genus in a once diverse family of horses that included 27 genera. The precise date of origin for the genus Equus is unknown, but evidence documents the dispersal of Equus from North America to Eurasia approximately 2–3 million years ago and a possible origin at about 3.4–3.9 million years ago. Following this original emigration, several extinctions occurred in North America, with additional migrations to Asia (presumably across the Bering Land Bridge), and return migrations back to North America, over time. The last North American extinction probably occurred between 13,000 and 11,000 years ago (Fazio 1995), although more recent extinctions for horses have been suggested. Dr. Ross MacPhee, Curator of Mammalogy at the American Museum of Natural History, and colleagues, have dated the existence of woolly mammoths and horses in North America to as recent as 7,600 years ago. Had it not been for previous westward migration, over the 2 Bering Land Bridge, into northwestern Russia (Siberia) and Asia, the horse would have faced complete extinction. However, Equus survived and spread to all continents of the globe, except Australia and Antarctica.
In 1493, on Columbus’ second voyage to the Americas, Spanish horses, representing E. caballus, were brought back to North America, first in the Virgin Islands, and, in 1519, they were reintroduced on the continent, in modern-day Mexico, from where they radiated throughout the American Great Plains, after escape from their owners or by pilfering (Fazio 1995).
Critics of the idea that the North American wild horse is a native animal, using only selected paleontological data, assert that the species, E. caballus (or the caballoid horse), which was introduced in 1519, was a different species from that which disappeared between 13,000–11,000 years before. Herein lies the crux of the debate. However, neither paleontological opinion nor modern molecular genetics support the contention that the modern horse in North America is non-native.
Equus, a monophyletic taxon, is first represented in the North American fossil record about four million years ago by E. simplicidens, and this species is directly ancestral to later Blancan species about three million years ago (Azaroli and Voorhies 1990). Azzaroli (1992) believed, again on the basis of fossil records, that E. simplicidens gave rise to the late Pliocene E. Idahoensis, and that species, in turn, gave rise to the first caballoid horses two million years ago in North America. Some migrated to Asia about one million years ago, while others, such as E. niobrarensis, remained in North America.
What is it that makes diseases caused by viruses and bacteria hard to treat?
Answer:
Influenza viruses and others continually change over time, usually by mutation. This change enables the virus to evade the immune system of its host so that people are susceptible to influenza virus infection throughout their lives. Bacteria mutate in the same way and can also become resistant if overtreated with antibiotics.
How many total autosomes are present ina
bug's normal karyotype?
Answer:
The insect species being studied has three pairs of homologous chromosomes. The first two pairs are autosomes; the last pair are sex chromosomes. Sex determination is the same as in humans (XX=female, XY=male).
Explanation:
I hope this helped, Have a Wonderful Day/Night!!!
What do all cells have in common?
Answer:
Most cells have many structures in common. Included among these are cytoplasm, a cell membrane, a nucleus, mitochondria, ribosomes, and vacuoles.
Explanation:
Hope this help! Happy Holidays!
Answer:
Most cells have many structures in common. Included among these are cytoplasm, a cell membrane, a nucleus, mitochondria, ribosomes, and vacuoles.
Explanation: this is the basic of all cells
Question 3
The surroundings where a particular species lives is known as its
1.abiotic zone
2.habitat
3.community
4.biomass
Answer:
habitat
Explanation:
becous community is for people
Answer:
its habitqt
Explanation:
leqrn this in 2nd grade
How does the molecule marked A enter our body
Answer:
Explanation:
A, breathing. It contains oxygen and that is what we use to breath.
Answer:
eating.
Explanation:
glucose (C6H12O6) is a monosaccharide aka a carbohydrate that we eat.
C6H1206 +602 +6CO2 + 6 H2O + ATP is the chemical equation for:
Answer:
It's the chemical equation for photosynthesis.
Explanation:
Glucose and oxygen combine and release water and carbon dioxide.
You have an unknown
substance in the lab. It
conducts electricity well. If
you had to make a guess
about this substance, what
would you guess about it?
A. The substance is most likely a base.
B. The substance is most likely an acid.
C. You cannot determine whether the
Substance is an acid or a base from this
information alone.
The traits studied in the experiments involving the crossing of pea plants are seed shape and seed - Brainly.com
In the chart shown above,16 seeds are produced. Yellow(Y) is Dominant to Green(y) and Round(R) is Dominant to wrinkled (r). Which of the following lists the most likely distribution of phenotypes in these seeds?
A. 6 round yellow seeds : 4 round green seeds :
4 wrinkled green seeds : 2 wrinkled yellow seeds
B. 9 round yellow seeds : 3 round green seeds :
3 wrinkled yellow seeds : 1 wrinkled green seeds
C. 4 round green seeds : 4 round yellow seeds :
4 wrinkled yellow seeds : 4 wrinkled green seeds
D. 8 round yellow seeds : 2 round green seeds :
2 wrinkled yellow seeds : 4 wrinkled green seeds
Answer: B
Explanation:
What part of the cardiovascular system is directly responsible for nutrient transport?
Answer:
Circulatory system
Explanation:
It is the body's delivery system, concerned with circulating blood to deliver oxygen and nutrients to every part of the body.
Answer:
blood
Explanation:
I took the test on edg.
Several different amino acids join together to form a protein. How do any two types of amino acids differ from one another?
A. the number of amino groups in the molecule
B. the number of carboxyl groups in the molecule
C. the chemical structure of the R group in the molecule
D. the number of chemical bonds formed by the central carbon atom
If the yellow allele is dominant (Y) and the green allele is recessive (y), what are the possible genotypes of a green offspring?
Answer:
yy
Explanation:
it can only be yy because you need 2 recessive genes to show a recessive trait.
A plant with Yy genes could pass the recessive genes on, but would still show the dominant trait.
The possible genotype of the green offspring is yy, i.e., recessive one and will express only in absence of dominant allele.
What is genotype?In a broad sense, the word "genotype" refers to an organism's genetic makeup; in other words, it describes an organism's entire set of genes.
In a narrower sense, the term can refer to the alleles, or variant forms of a gene, that an organism carries.
A genotype is a classification of the type of variant found at a specific location (i.e., a locus) in the genome.
Symbols can be used to represent it. For example, the letters BB, Bb, bb could be used to represent a specific variant in a gene.
In the given scenario, Y is dominant allele which will express in combination with y means the recessive one.
Thus, for expressing the green allele, it should be yy.
For more details regarding genotype, visit:
https://brainly.com/question/12116830
#SPJ2
PLEASE HELP ASAP WILL GIVE 20 POINTS ONLY ANSWER IF YOU KNOW THE ANSWER!!!!!!
Describe some home or business technology that use spectrometric equipment to analyze atmosphere or temperature
If a fish has 30 chromosomes in each of its somatic cells, how many chromosomes will be in each daughter cell after mitosis?
Answer:
it would be 60
Explanation:
because if haploid cells double the amount of chromosomes then diploid would do the opposite
An unidentified plant produces spores, has many cells, but does not have true leaves. What plant is it?
A. liverwort
В. fern
C. gymnosperm
D. angiosperm
An unidentified plant produces spores, has many cells, but does not have true leaves. It is a fern or the angiosperms. Thus, option C is correct.
What are angiosperms?Angiosperms, that are also known as flowering plants, have “seeds” that are sealed off within an “ovary”, while gymnosperms do not have fruits or flowers and have uncovered seeds on the surface of leaves. Seeds of gymnosperms are often arranged as “cones”.
The features and characteristics that distinguish angiosperms from gymnosperms are fruits, flowers, and “endosperm” in the seeds. Examples of “Angiosperms” are “monocots” like orchids, lilies, agaves, grasses and dicots like, peas, roses, sunflowers, maples and oaks. “Gymnosperm” examples include “non-flowering evergreen” trees like pine, fir and spruce.
Therefore,An unidentified plant produces spores, has many cells, but does not have true leaves. It is a fern or the angiosperms. Thus, option C is correct.
Learn more about angiosperms on:
https://brainly.com/question/9416370
#SPJ6
