Answer:
23
Explanation:
After mitosis two identical cells are created with the same original number of chromosomes; 46. Haploid cells that are generated through meiosis, such as egg and sperm, only have 23 chromosomes, because, remember, meiosis is a "reduction division."
The copper wire is cut into three pieces of unequal lengths. All three pieces of copper would have (1 point)
A the same mass
B the seſme physical properties
C different crystal structures
D different arrangement of atoms
B.) The same physical properties.
Also the copper wire would also have the same Chemical Properties. They wouldn't have a different arrangements of atoms because that would mean they are a different substance. They wouldn't have the same mass whereas they are now in 2 pieces. Copper is not a crystal meaning it would not have any crystal structures. That leaves the only applicable answer to be B. Also in case you need to find whether or not two identical substances are the same would be by testing the melting point, hardness and solubility. I just finished working on this section in my own 8th grade Science class so I think this should either help you now or later on.
Hope this helps.
-Northstar
Why doesn’t the chromosome number double every time a new generation is formed?
Answer:
Mitosis
Explanation:
Mitosis is the process of cell division. both daughter cells that come out of mitosis are duplicates of eachother. the chromosomes split so each cell has the same amount as the parent cell. thus, the chromosomes do not double.
Why can some hazards be predicted and others can’t?
Answer:
Predicting the size, location, and timing of natural hazards is virtually impossible, but now, earth scientists are able to forecast hurricanes, floods, earthquakes, volcanic eruptions, wildfires, and landslides using fractals.
Name five countries that are in the southern hemisphere
Answer:
Argentina, Bolivia, Chile, Paraguay, Peru.
Answer:
1. Argentina.
2. Bolivia.
3. Chile.
4. Paraguay.
5. Peru.
6. Uruguay.
Which sequence best explains the relationship between DNA and protein structure and function?
Answer:
DNA base triplets → amino acid sequence → protein folding pattern → protein shape and function
DNA sequence provides the code for the amino acid sequence. The amino acid sequence determines the protein structure, which affects the protein's function.
What is the relation between DNA and protein?The relation between DNA and protein can be described as follows:
DNA carries the genetic code: DNA is made up of a long chain of nucleotides, which are the building blocks of DNA. Each nucleotide consists of a sugar, a phosphate group, and a nitrogenous base. There are four types of nitrogenous bases in DNA: adenine, guanine, cytosine, and thymine. The sequence of these bases carries the genetic code that provides the instructions for the synthesis of proteins.
DNA is transcribed into RNA: The DNA code is transcribed into a complementary RNA (ribonucleic acid) molecule through a process called transcription. RNA is similar to DNA, but it is made up of a different sugar (ribose) and a different nitrogenous base (uracil).
RNA is translated into protein: The RNA molecule is then translated into the amino acid sequence of a protein through a process called translation. This involves the use of transfer RNA (tRNA) molecules, which carry specific amino acids and bind to the RNA molecule at specific codons (sequences of three nucleotides). The sequence of codons in the RNA molecule determines the sequence of amino acids in the protein.
Protein structure determines function: The amino acid sequence of a protein determines its three-dimensional structure, which in turn determines its function. Proteins can have a variety of functions in the body, including catalyzing chemical reactions, transporting molecules, providing structural support, and regulating cell function.
Learn more about amino acid sequence, here:
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EOC QUESTIONS
1. Which of the following best illustrates natural selection?
a. An organism with favorable genetic variations will tend to survive and breed successfully.
b. A population monopolizes all of the resources in its habitat, forcing other species to migrate.
c. A community whose members work together utilizing all existing resources and migratory routes.
d. The largest organisms in a species receive the only breeding opportunities.
2. In his book On the Origin of the Species, Charles Darwin described how species change over time. Which of the following is NOT part of his observations that describes the mechanisms of natural selection?
a. Organisms produce more offspring than can survive.
b. Disease and natural disaster will limit population growth.
c. Species today descended with modifications from ancestral species.
d. Organisms with advantages will survive and reproduce.
3. Over time, the climate of an island became drier, which resulted in changes to the populations of various island finch species. Finch populations with a certain beak shape thrived, while those not having that beak shape decreased. Which of the following describes a necessary condition for these changes in the finch populations to occur?
a. fewer mutations
b. limited food resources
c. limited beak variations
d. overproduction of offspring
4. Which of these would have the least effect on natural selection in a subspecies of giraffes that is geographically isolated from other subspecies of giraffes?
a. available niches
b. existing predators
c. chromosome number
d. available food resources
Q1. A. An organism with favorable genetic variations will tend to survive and breed successfully
Q2. C
Q3.b. limited food resources
Q4.c. chromosome number
By using mutable collagenous tissue, what advantage do Echinoderms have?
Answer:
The properties of this connective tissue are mutable for a short period of time, under neural control, which provides certain mechanical advantages, which include the ability to maintain various postures without muscular effort; that is, it allows Echinoderms to change the consistency of the body, this is useful to escape predators or crawl along the seabed.
Explanation:
Echinoderms comprise the marine organisms known as starfish, sea urchins, sea cucumbers and sea lilies. These present, for the most part, benthic habits and are distributed from intertidal environments to deep bottoms and at different latitudes. They have a mutable collagenous tissue that allows them to change the consistency of the body, that is, they can rapidly change their stiffness and is involved in processes such as fission and autotomy. Some echinoderms quickly switch back and forth between being soft and stiff, which helps crawl along the seabed. Others twist only once from stiff to soft, letting a starfish cut off one of their arms to escape a predator, that is, they can drop an arm when attacked by a predator. When this happens it is called autotomy or autoamputation and the nervous system tells the mutable collagen tissue near the base of the arm to disintegrate. The wound heals and then the arm grows back, a process that can take weeks to months, depending on the species.
Answer:
saves energy
Explanation:
Mutable collagenous tissue is used to lock an Echinoderm into position.
To determine if a particular plant is h0m0zygous or h8t8rozygous, you would have to test cross with a (h0m0zygous, H8t8rozygous) recessive.
i had to post it with the 0 and 8 bc it would let me say the actual word
Answer:
i'm not sure sorry
Explanation:
Answer:
h20
Explanation:
Find out two types of water purification and name and describe them here.
Answer:
1. Reverse Osmosis
Reverse Osmosis works by forcing feedwater through a semi-permeable membrane.
A pump is used to apply pressure to reverse the normal osmotic flow across a membrane, meaning purified water molecules (permeate) are forced through the reverse osmosis membrane and recovered in preference to contaminants in the concentrated side which are left behind (reject concentrate).
2. Oxidisation
Oxidisation in the form of chlorination has been used as a means of water purification since the beginning of the last century. Hypochlorite is the key agent, achieving a disinfection of water by oxidising bacteria to eliminate waterborne diseases. Several different methods can be used to provide oxidation, including ozonation, chloramination, UV, bromination & chlorine dioxide. During the treatment, hydroxyl radicals are generated to destroy bacteria cells.
What is needed for dna replication select all that apply
Answer:
substrates, template, primer and enzymes.
Explanation:
Choose an organism and predict a trait that would be helpful for its survival. Do you think this could be an evolutionary change? What would have to happen for this trait to be expressed?
1. How does soil porosity affect water holding capacity?
Answer: Soil porosity refers to the space between soil particles, which consists of various amounts of water and air. Porosity depends on both soil texture and structure. ... Water can be held tighter in small pores than in large ones, so fine soils can hold more water than coarse soils.
Explanation:
Answer:
the soil porosity refers to the space between soil particles
A heart attack happens when part of the heart muscles
dies or damaged
true
false
Explanation:
It is true, because whan heart muscle are damaged heart attack happened.
please Mark as BRAINLIST answer
Question 4
By examining
scientists can test predictions for situations in which it is
impossible or unethical to use experiments.
O variables
O control groups
observations
O correlation
Answer:
correlation
Explanation:
By examining correlation, scientists can test predictions for situations in which it is impossible or unethical to use experiments.
Correlation determines if there is, and measures the strength of the relationship between two variables. Hypotheses are usually tested by experiments in science, but some situations make experiments impossible or unethical to be performed directly. In such cases, simulational experiments are performed and correlation is used to theoretically determine or predict the outcome of situations.
What is the best way to prevent contracting the influenza virus?
A.taking antibiotics B.getting a vaccination C.Drinking lots of water D.treating water supplies
Answer:
B. Getting a vaccination.
Explanation:
B. Getting A Vaccination
Influenza virus It is a respiratory virus because it infects the respiratory tract including the nose, mouth, bronchi and can even go further into the lungs to the alveoli and cause pneumonia. A person will spread the virus through coughing or sneazing that become airborne droplets. When a suceptible person comes in contact and breathes in these droplets, it causes an infection.
Trust Me HAHA
the cover of a book has an area of 400 cm², the book has a
heigh of 4 cm. what
is the books volume? use the
correct unit for volume in your awnser.
Answer:
1600cm³
Explanation:
The volume of a cuboid can be calculated as follows;
V = L × B × H
Where;
L = length (cm)
B = breadth or width (cm)
H = height (cm)
However, in this question, the area of the book is said to be 400cm². Since area of a rectangle or rectangular-shaped object like the book is L × B, this means that the length and breadth has been combined in the area. Hence;
Volume of the book = area of the book (L × B) × Height of the book (H)
Volume = 400cm² × 4cm
Volume = 1600cm³
Therefore, the volume of the book is 1600cm³.
Someone please help me with the 4th question only plz!
Explain what is different about how genetic
information (DNA) is stored in prokaryotes and
eukaryotes? *
Answer:
The main difference between eukaryotic and prokaryotic cells is that eukaryotic cells have a nucleus.
The nucleus is where cells store their DNA, which is the genetic material.
The nucleus is surrounded by a membrane. ...
Explanation:
All prokaryotes are single-celled (unicellular) organisms.
In a DNA strand, you find that 20% of the bases are Adenine. What percentage of the DNA would be Cytosine?
Answer:
Yes
Explanation:Since adenine is 20%, then thymine is 20% as well. The total of both is 40%. From 100 remains 60% which is divided equally between guanine and cytosine, so each is 30%.
Why can we predict seasons, moon phases, tides and constellations?
Which is the site of the most ATP production during cellular respiration?
O nucleus
O mitochondrion
O cytoplasm
O chloroplast
Answer:
b
Explanation:
If a plant cell is placed in hypotonic solution, it becomes
Answer:
I don't know
Explanation:
can you help me with this question The following lines from Frost's "The Road Not Taken" indicate what about the Speaker? Line 2: And sorry I could not travel both Line 3: And be one traveler long I stood A. The spaaker is waiting for someone TOT a long time ("long I stood"). B The speaker is traveling by himself- just "one traveler." C. The speaker is sorry he can't travel both roads
Answer:
turgid
Explanation:
When the plant cell is placed in a hypotonic solution , it takes up water by osmosis and starts to swell, but the cell wall prevents it from bursting.
HOPE IT HELPS :)
how do cells use oxygen during cellular respiration
Answer:
In cellular respiration, cells use oxygen to break the sugar molecule. That releases the energy which is then transferred to an ATP (adenosine triphosphate) molecule. ATP is the fuel that cells need for energy. And where does cellular respiration happen?
Explanation:
Briefly describe the layers of the atmosphere:Troposphere-Exosphere-Stratosphere-Mesosphere-Thermosphere-
Answer:
Explanation:
-Troposphere. It is the lowest layer and encompasses the Earth's surface up to an average height of 12 kilometers; about 17 kilometers in the equatorial regions and about 9 kilometers at poles
- Stratosphere.Separated from the troposphere by the tropopause is this layer containing 19 percent of the atmospheric gases, but very little amount of water vapour.
-Mesosphere. It is located above the stratosphere up to a height of 80-85 kilometers in the mid-latitudes, where the mesopause is located.
-Thermosphere. From the upper limit of the mesopause extends the thermosphere, known as the upper atmosphere.
-Exosfera. It is the last layer, the outerest until connected with the solar wind.
Is it possible to know the location of a gene on a chromosome if only one other gene is used?
Answer:
The arm of the chromosome. Each chromosome is divided into two sections (arms) based on the location of a narrowing (constriction) called the centromere. By convention, the shorter arm is called p, and the longer arm is called q. The chromosome arm is the second part of the gene's address.
Explanation:
i need some help asap
Answer:
B) Nucleotides that stores the code for proteins
Explanation:
RNA and DNA are polymers made of long chains of nucleotides
Why was Fisher skeptical of Mendel's data?
Answer:
It was too perfect
Explanation:
In a typical long bone, spongy bone is found in the
Answer:
epiphysis
Explanation:
Answer:Anatomy of a Long Bone A typical long bone shows the gross anatomical characteristics of bone. The wider section at each end of the bone is called the epiphysis (plural = epiphyses), which is filled with spongy bone. Red marrow fills the spaces in the spongy bone.
Explanation:Hope this helped u may i get brainlist plz only if u wanna give me brainlist though. Have an great day kind sir or ma'am!
The diagram of a cell shows some of its principal organelles. Drag the description of the function of the organelle indicated to the correct region.
100pts WILL GIVE BRAINLIEST
Answer:
4 is 1 6 is 2 3 is 3 5 is 4
Explanation:
i hope yo understand this
What types of stems are in plants?
O Aerial
O Subterranean
O Acaulescent
O All of the above