Answer: The correct option is (D) lithium (Li).
Explanation: Hydrogen is the element which belong to period 1. The atomic number of hydrogen is, 1
The electronic configuration of hydrogen is,
The number of valence electrons present in hydrogen is, 1.
(A) Helium is the element which belong to period 1. The atomic number of helium is, 2
The electronic configuration of helium is,
The number of valence electrons present in helium is, 2.
(B) Oxygen is the element which belong to period 2. The atomic number of oxygen is, 8
The electronic configuration of oxygen is,
The number of valence electrons present in oxygen is, 6.
(C) Nitrogen is the element which belong to period 2. The atomic number of nitrogen is, 7
The electronic configuration of nitrogen is,
The number of valence electrons present in nitrogen is, 5.
(D) Lithium is the element which belong to period 2. The atomic number of lithium is, 3
The electronic configuration of lithium is,
The number of valence electrons present in lithium is, 1.
From this we conclude that the lithium element has the same number of valence electrons as hydrogen.
Hence, the correct option is (D) lithium (Li).
The element that can be considered as a replacement for hydrogen in displacement reaction is lithium (Li)
Displacement reaction can be regarded as type of reaction whereby atom is been displaced by another atom in a molecule. Hydrogen has one valence electrons which is the same as the valence electrons in Lithium, and this implies that it can replace Hydrogen in a displacement reaction.Therefore, option A is correct.
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Which of the following is true about cells?
A. A cell’s components are all identical and perform the same function.
B. Cells have specialized components that all perform the same functions.
C. A cell has a single component that performs all of the cell’s different, specific functions.
D. Cells have specialized components that perform different, specific functions.
Answer:
D
Explanation:
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the transport a very large molecules such as proteins
Answer:
Very large molecules such as proteins are too big to move through the cell membrane which is said to be impermeable to them. The type of transport proteins present in a cell membrane determines which substances the membrane is permeable to. CO2 molecules pass directly through phospholipids. Glucose molecules travel through the proteins.
What is the role of knowing the Earth's history to mankind?
Answer:
Earth history enables us to understand those changes which no human being has ever seen (or if they have, they didn't record it) and to relate them to modern changes. Such events include: The rise and extinction of the dinosaurs. The formation of the Grand Canyon.
Explanation:
Answer:
Earth history enables us to understand those changes which no human being has ever seen (or if they have, they didn't record it) and to relate them to modern changes. Such events include: The rise and extinction of the dinosaurs. The formation of the Grand Canyon.
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Following the fusion of an egg cell and sperm cell, the resulting diploid cell divides by mitosis to create two new daughter cells. Each daughter cell contains pairs of chromosomes, with one set inherited from each parent.
Which of the following best describes the pairs of chromosomes that are present in each newly formed daughter cell?
Choose 1 answer:
A) The pairs are homologous chromosomes that have the same set of genes, but likely different variations of those genes.
B) The pairs are non-homologous chromosomes that contain different sets of genes.
C) The pairs are homologous chromosomes that have identical copies of every gene.
Answer: A
i have no idea why
The pairs are homologous chromosomes that have the same set of genes, but likely different variations of those genes. The correct option is A.
What are homologous chromosomes?Among a pair of chromosomes with the very same gene sequence, loci, chromosomal size, and centromere location is referred to as a homologous chromosome.
One paternal and one maternal chromosome make up a homologous pair. In humans, the nucleus of a somatic cell contains 46 chromosomes.
Homologous chromosomes differ from sister chromatids because they are not identical and do not emanates from the same organism.
Sister chromatids are identical, side-by-side duplicates of each other that form as a result of DNA replication.
Homologous chromosomes do not pair together during mitosis. Homologous chromosomes line up end-to-end in mitosis so that when the cells divide, each daughter cell receives a sister chromatid from both members of the homologous pair.
Thus, the correct option is A.
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True or False: A positive ion and a negative ion will repel each other.
Answer:
FALSE is correct
Explanation: Questions protected!
Fungi have chlorophyll.
True
False
False- unlike plants fungi to not have chlorophyl.
Why- Fungi do not need the sun to make food instead they break down their own food.
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Why kharif crops cannot grow in rabi seasons?
Answer:
We know that kharif crops such as paddy need more water to grow healthy, which requires in rainy season. But in winter season , which does not requires so much, hence kharif crops cannot grow in this season healthy and properly. Therefore kharif crops cannot be grown in rabi season.
What makes social animals unique?
Answer:
In these species, members of the group depend completely on one another. Different animals within the group have different jobs. Therefore, group members must work together for the good of all. Most species of ants and bees are highly social animals.
Explanation:
Human cells have _____ sets of DNA in each cell.
A) 2
B) 4
C) 1
D) 8
Answer:
See answer below.
Answer is verified.
Explanation:
Human cells have two sets of DNA in each cell.
And a total of 46 chromosomes in each cell.
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Human cells have two sets of DNA in each cell. Thus, the correct option is A.
What is DNA?DNA stands for Deoxyribonucleic acid. It is considered the genetic material of most organisms. It consists of base pairs like adenine, thymine, guanine, and cytosine.
Human cells have two sets of DNA in each cell, one came from the paternal side while the other came from the maternal side.
Therefore, it is well described above.
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In wolves, gray coat color (G) is dominant to black (g) and brown eyes (B) are dominant to blue (b). The genes that control these traits are located on different chromosomes. The alpha male of the pack has the dominant phenotype for both traits and is heterozygous for both traits. The alpha female has brown eyes and a black coat; she is heterozygous for eye color. Which option represents gametes that would be made by the alpha female
The combination of gametes that will be produced by the Alpha female is Bg, Bg, bg and bg.
According to this question, two genes coding for eye color and coat color in wolves are involved. Gray coat color (G) is dominant to black coat color (g) while brown eyes (B) are dominant to blue eyes (b). The alpha female of the pack is said to have a brown eyes and a black coat (gg) but she is heterozygous for eye color (Bb). This means that she posseses the following genotype: Bbgg. According to Mendel in his law of independent assortment, alleles of a gene will segregate into gametes independently of one another. This means that the alpha female with genotype (Bbgg) will segregate into the following combinations of gametes: Bg, Bg, bg and bg.Learn more about gamete formation at: https://brainly.com/question/11523490?referrer=searchResults
What is ATP called after it loses its 3rd phosphate group?
How is Wallace's view scientific
How does a virus and viroid differ from each other?
Answer: The main difference between virus and viroids is that a virus is a small infectious agent, which can only replicate inside living cells whereas viroids are the smallest form of infectious agents, which only infect plants.
Which of the following statements is TRUE during depolarization?
Answer:
a is correct
Explanation:
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Answer:
The answer is C, from hydrosphere to atmosphere
Answer:
C
Explanation:
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The plant roots containing nitrogen fixing bacteria are: *
(a) Maize
(b) Cotton
(c) Pea
(d) Wheat
The plant roots containing nitrogen fixing bacteria are
C. PEAPlants of the Pea Family known as legumes, are some of the most important hosts for nitrogen-fixing bacteria, but a number of other plants can also harbour these helpful bacteria.
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What of the following best explains the pace and timing of evolutionary change?
A: Evolutionary change quickly and constantly occurs throughout time.
B: The pace of evolutionary change has slowed down over time, and it only rarely occurs now.
C: Periods during which evolution occurred were always preceded by a catastrophe.
D: Long periods of stability were punctuated with periods of evolutionary change.
Answer:
B: The pace of evolutionary change has slowed down over time, and it only rarely occurs now.
Explanation:
What of the following best explains the pace and timing of evolutionary change The pace of evolutionary change has slowed down over time, and it only rarely occurs now.
Answer:
D: Long periods of stability were punctuated with periods of evolutionary change.
Explanation:
3. In the context of the article, how are we changed by war? Cite evidence from this text, your own experience, and other literature, art, or history in your answer
please help
Answer:
She wrote letters and diaries by talking about the war.
Diffusion and Osmosis, including the words hypertonic, hypotonic, isotonic, and
concentration.
Answer:
Where is the question!??
Define: Heterogeneous Distribution, Modularity and Nestedness.
Explanation:
Nestedness is another computational approach that provides a description of groups of webs..
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Answer:
Heterogeneous Distribution, ModularityHeterogeneity in statistics means that your populations, samples or results are different. It is the opposite of homogeneity, which means that the population/data/results are the same. ... For example, if everyone in your group varied between 4'3″ and 7'6″ tall, they would be heterogeneous for height.Explanation:
please brainlies me if you carry please #carry on learningWhich ball-and-socket joint is the most freely moveable joint in the body?
Answer:
c. Glenohumeral joint
Explanation: is correct (the Shoulder joint)
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How can using a dam as a source of freshwater also harm wildlife?
A. Dams help control floodwaters.
B. Dams provide drinking water.
C. Dams displace existing habitats.
Ο Ο
D. Dams provide water recreation.
Answer:
c
Explanation:
because its the only one that would be hurting wild life.
Using a dam as a source of freshwater can harm wildlife by displacing existing habitats. Therefore, option (C) is correct.
What are the negative impacts of dams?Dams often require the creation of reservoirs, which can submerge large areas of land and alter the natural flow of rivers and streams. This can lead to the loss of important habitats for fish, mammals, and other wildlife that rely on rivers and streams for food, shelter, and reproduction.
In addition, changes in water temperature, dissolved oxygen levels, and water flow can negatively impact aquatic ecosystems downstream from the dam.
These impacts can be mitigated through careful planning and management, such as the creation of fish ladders and other structures to help fish navigate past the dam, and the release of water at appropriate times to mimic natural flow patterns.
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One of the following statements is correct about glycolysis:
A.Net gain of only 2 ATP.
B.Glycolysis in fermentation reaction requires more oxygen than glycolysis in aerobic respiration
C.Carbon dioxide is used during glycolysis to form ATP.
D.Only animals can carry on glycolysis.
Answer:
A.
Explanation:
Glycolysis produces 4 ATP molecules in total, however 2 ATP molecules are used to convert a glucose molecule into a new 6 carbon compound with 2 phosphates attached to it. So, the net yield of ATP is 2 molecules.
Answer:
A net gain of only 2 ATP
Explanation:
Articulations are classified by their function or structure. Which of the following is an example of functional classification?
Answer:
d. Synarthrotic joints
Explanation: is correct for the choices offered.
thinking about the components in pcr, do you think there are major differences in the process of dna replication between species?
The major difference in the process of DNA replication between species is the linear order of nucleotides, which can be amplified by PCR. This technique enables the amplification of specific DNA fragments.
The Polymerase chain reaction (PCR) is a technique widely used in molecular biology in order to amplify and thus identify small DNA fragments (approx. 1000 pb).
The PCR uses all materials required to carry out DNA replication: a thermostable DNA polymerase, primers (DNA oligonucleotides), deoxyribonucleotides (ddA, ddG, ddC, or ddT), and template DNA.
The template DNA indicates the linear order of nucleotides that will be added to the amplified DNA fragment, which is highly specific and may vary even between individuals of the same species.
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The active ingredient in which of the following drugs mimics a natural neurotransmitter?
Answer:
b. marijuana is correct
Explanation:
which organelle could be used to distinguish between a plant cell and an animal cell?
Answer:
Plant cells have a cell wall, chloroplasts, plasmodesmata, and plastids used for storage, and a large central vacuole, whereas animal cells do not.
how does a single genome code for so many types of tissues
Answer:
The genome of a cell contains in its DNA sequence the information to make many thousands of different protein and RNA molecules. A cell typically expresses only a fraction of its genes, and the different types of cells in multicellular organisms arise because different sets of genes are expressed.
The genome, which is the second layer, regulates gene access, allowing each cell type to activate its own unique genes while shutting off the majority of the others.
What is genome?The complete set of DNA instructions present in a cell is known as the genome. The human genome is made up of 23 pairs of chromosomes that are found in the cell's nucleus and one tiny chromosome that is found in the mitochondria.
Everything a person needs to grow and operate is encoded in their genome. The DNA sequence in a cell's genome contains the instructions needed to create tens of thousands of different protein and RNA molecules.
Thus, in multicellular organisms, distinct cell types develop because diverse sets of genes are expressed, even though a cell normally expresses just a portion of its genes.
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Based on the video, do you think changes to the environment could still affect living things on Earth today? Explain your answer using information from the video to support your argument.
Answer:
Yes. Unicellular organisms died because of a change in temperature, which is an environmental change. If the environment on Earth changes too much, it will affect living things. If the changes are too drastic, life may not be able to survive.
Explanation:
Which layer in the blood vessel is composed of smooth muscle, allowing it to dilate or constrict?
Tunica intima
*Tunica media
Tunica externa
Endothelium
Answer:
b. Tunica media
Explanation:is correct
Answer:
B. Tunica media
Explanation:
