Answer:
ACU - Thr
Explanation:
What are the two limits of natural selections
What are cell cycle regulators
Answer: A conserved set of cyclin-dependent protein kinases (Cdks) initiate or regulate events through phosphorylation of intracellular proteins, thus controlling cell cycle progression, terminal differentiation, and apoptosis.
Explanation: Your welcome! ;D
Please help!!! Needing an answer ASAP cause it's due in 30 mins!!! Please and thanks!!!:
how do mitosis and meiosis play a role in cat breeding? Explain.
Answer:
mitosis is a process of body cell formation, while meiosis is a process of reproductive cell formation. i hope i helped (instagram itzactuallytif)
Answer:
: Mitosis and meiosis both are the types of cell division which occurs in the body of living organisms. Mitosis is responsible for growth and development in the body of cat because in mitosis, one cell is divided into two daughter cells and again these two cells divided into four and so on which increases size of organisms, while meiosis is responsible for the production of sex cells in cat which enables them to continue its breeding and produce fertile offspring.
Explanation:
Why is it important for gametes to be haploid cells?
The reason why it is important for gametes to be haploid cells is because: when the sperm and the egg fuse together the living sex cells will have 46 chromosomes.
Gametes are also referred to as sex cells and they can be defined as the reproductive cells in a living organism.
Generally, the male reproductive cell is known as a sperm while the female reproductive cell is known as an egg.
Since gametes are reproductive cells or sex cells, they are typically made up of haploid set of chromosomes.
Basically, it is very important for gametes to be haploid cells so that when the sperm and the egg fuse together, the living sex cells will have a total of 46 chromosomes.
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Where do spores come from?
Answer:
Spores, for the most part, are units of asexual reproduction. They are produced by nonflowering plants, bacteria, fungi, and algae, and are often able to travel over long distances.
Explanation:
-
Identify the fleshy fruit type based on the
definition.
- contains a single seed, often a stony pit
flesh comes from enlarged receptacle that
grows around the ovary, endocarp is papery
- develops from a compound ovary (several
pistils fused together), usually contains more
than one seed
Answer:
drupes
Explanation:
drupes are a fleshy fruit type, containing a single pit.
Which of the following statements is true about sensory cells in the gustatory system? Sensory cells migrate to the edge of taste buds to die after a month. Sensory cells last a very long time and are renewed about once a year. Sensory cells are located near the center of the taste bud when renewed. Sensory cells last approximately two weeks and are renewed frequently.
Answer:
Sensory cells last approximately two weeks and are renewed frequently.
Explanation:
Sensory cells last approximately two weeks and are renewed frequently. The correct option is D.
What is gustatory system?The gustatory system is the sensory system in charge of taste and flavor perception.
The gustatory system in humans is made up of taste cells in the mouth (that also detect the five texture and flavor methodologies: salty, sweet, bitter, sour, and umami), several cranial nerves, and the gustatory cortex.
Sensory cells are cells with receptors on their surface that detect information (such as sounds, light, touch, smell, taste, and temperature). This information is transmitted from sensory cells to the brain via nerves.
Taste receptor cells function similarly to neurons, but, like epithelial cells, they are rapidly and continuously renewed throughout adulthood.
Sensory cells have a lifespan of about two weeks and are constantly renewed.
Thus, the correct option is D.
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Include an explanation of how the surface area-to-volume ratio, diffusion rate, and time for substances to reach the center are related. Support your explanation with data
Answer:
simple:
Explanation:
When the cell increases in size, the volume increases faster than the surface area, because volume is cubed where surface area is squared. When there is more volume and less surface area, diffusion takes longer and is less effective.
How does being small help cells survive?
Cells are small in size because it is very important that they have a surface area to volume ratio that would allow adequate intake of food nutrients, as well as the excretion of waste materials.
A cell can be defined as the fundamental (basic), functional, structural and smallest unit of life found in all living organisms.
According to cell type, living organism are mainly divided into two (2) main groups and these are;
Unicellular organisms: these are living organisms that are single-celled i.e they have a single cell.Multicellular organisms: this category of living organisms have many (multiple) cells.It is very important that the surface area to the volume ratio of cell is small, so as to allow enough materials such as food, move through the cell membrane quickly for the survival of the cell.
Hence, cells are small in size because it is very important that they have a surface area to volume ratio that would allow adequate intake of food nutrients, as well as the excretion of waste materials.
In conclusion, the smaller a cell, the larger would be its surface area to volume ratio.
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The ocean sunfish (Mola mola) is a large, flat fish that spends most of its time in deep water
feeding mainly on jellyfish, Sunfish often have many species of copepods, small crustaceans,
that bury their heads into the soft tissue of the sunfish, Sunfish will swim to the surface of the
water and lie sideways, allowing seabirds to eat the copepods from their skin,
Which list describes the types of relationships the sunfish has with other marine organisms?
The group of choices is given below :
a. Seabirds: mutualism
Jellyfish: predation
Copepods: parasitism
b. Seabirds: parasitism
Jellyfish: commensalism
Copepods: predation
c. Seabirds: predation
Jellyfish: mutualism
Copepods: commensalism
d. Seabirds: commensalism
Jellyfish: parasitism
Copepods: mutualism
Answer:
The correct answer is option A. Seabirds: mutualism
Jellyfish: predation
Copepods: parasitism
Explanation:
In this given example sunfish have three different relationships with all three organisms that are related to it tat are seabird, jellyfish, and copepods.
With seabirds, sunfish shows mutualism as they both get benefitted from their relationship in which seabirds feed on copepods and sunfish get rid of their parasite.
With jellyfish, sunfish feed on the jellyfish mainly which suggests that they are predator and jellyfish are prey and their relationship is of predation.
With copepods, copepods bury their heads on the soft tissue of the sunfish so they are parasite on the sunfish that is example of the parasitism
Answer:
A. Seabirds: mutualism
Explanation:
A. Seabirds: mutualism
Jellyfish: predation
Copepods: parasitism
The structure of DNA resembles a twisted ladder. Which structural components form the rungs of the ladder?
A deoxyribose sugars
B phosphate groups
C nitrogenous base pairs
D ribosomes
answer is nitrogenous base pairs
Answer:
The ratios of thymine and adenine were similar, as were the ratios of guanine and cytosine.
Explanation:
deoxyribose + phosphate group + thymine
Answer:
C
Explanation:
What did Watson and Crick’s model of DNA show?
sugars and phosphates on the inside
nitrogenous bases on the outside
a single nucleotide strand twisted in a spiral
two nucleotide strands wound in a double helix
Answer:
D.) Two nucleotide strands wound in a double helix.
Explanation:
Their model shows that DNA is composed of two double strand of nucleotide which are twisted around each other and run in antiparallel direction. the phosphate group and pentose sugar are present on outside, while nitrogenous base is present on inside
Answer:
Franklin produced an image containing "two strands twisted with double helix and phosphate back bone with base pairs".
Watson and Crick taken the x-ray image created by Franklin which lead to discovery of accurate model of shape of DNA.
.
Explanation:
2020
What takes place in the mitochondria matrix?
Answer:
In the mitochondrion, the matrix is the space within the inner membrane. ... The enzymes in the matrix facilitate reactions responsible for the production of ATP, such as the citric acid cycle, oxidative phosphorylation, oxidation of pyruvate, and the beta oxidation of fatty acids.
Explanation:
In the mitochondrion, the matrix is the space within the inner membrane. ... The enzymes in the matrix facilitate reactions responsible for the production of ATP, such as the citric acid cycle, oxidative phosphorylation, oxidation of pyruvate, and the beta oxidation of fatty acids.
True or False? No organism can maintain homeostasis by itself
Answer:
TrueExplanation:
Hope this helps! <3
C2H6O1 what is the answer?
Answer:
46.0684
Explanation:
Answer:
I'm sorry but I don't understand your question.
8.The advantage of light microscope over electrons microscope:
Ait doesn't require electric relay
Bit is easier to move from place to place
Cit is so expensive
DA and B
Answer:
may be D is the right answer because
electrons microscope it not easy to handle and so expensive but light microscope is easy to handle and less experience
Help ASAP! Which of the following does NOT act as an electron carrier (a filled “shopping cart”) in
cellular respiration or photosynthesis?
a) NADH
b) ATP
c) FADH2
d) NADPH
Answer:
I think it’s NADH
Explanation:
Which of the following is an example of how an organism depends on Earth's natural resources for survival?
A.
Humans grow corn and wheat as food sources.
B.
Beavers use tree branches to build dams and shelters.
C.
Plants take in nutrients and groundwater from the soil.
D.
all of these
In pea plants, the allele for round seeds is dominant to the allele for wrinkled seeds. If a plant that is heterozygous for seed type is crossed with one that has only wrinkled seeds, what percent of their offspring would you expect to have wrinkled seeds?
Answer:
50%
Explanation:
This question involves a gene coding for seed shape. The allele for round seeds (R) is dominant over the allele for wrinkled seeds (r). A heterozygous plant (Rr) will therefore be round seeded.
If a plant that is heterozygous for seed type (Rr) is crossed with one that has only wrinkled seeds (rr), the following gametes will be produced by each parent:
Rr - R and r
rr - r and r
Using these gametes in a punnet square (see attached image), the following offsprings will be produced: Rr, Rr, rr and rr
Rr - Round seeds
rr - wrinkled seeds
1 out of 2 offsprings will be possess wrinkled seeds i.e. 1/2 × 100 = 50%.
What is
the part of the body that produces insulin?
Answer:
Your pancreas makes a hormone called insulin (pronounced: IN-suh-lin). Insulin helps the glucose get into the body's cells. Your body gets the energy it needs
Explanation:
plz mark as brainliest..........hope it helps
A difference between food chains and food webs is that food webs are...
O bigger
Smaller
Answer: Food webs are bigger, food chain is smaller.
Explanation:
Food webs are multiple food chains into one web.
I Need Help On Identifying The Characteristics Of Life That Is Illlustarated By Each Of The Following Statements.
What does DNA provide the code for?
A nitrogenous base pairing
B protein synthesis
C deoxyribose formation
D nucleotide synthesis
answer is protein synthesis
Answer:
protein synthesis
Explanation:
DNA provides the code for protein synthesis. This DNA code consists of the instructions needed to make proteins and molecules which are essential for our growth, development, and health.
Why is oceanic crust younger than continental crust?
Oceanic crust is younger than continental crust because it undergoes continuous formation and destruction through seafloor spreading and subduction.
The age difference between oceanic crust and continental crust is primarily due to the process of plate tectonics. Oceanic crust is constantly forming at mid-oceanic ridges through a process called seafloor spreading. This occurs when molten material from the mantle rises to the surface and creates new crust. As new crust forms, older crust is pushed away from the ridges, gradually moving away from the spreading center.
In contrast, continental crust is older because it is not continuously formed or destroyed like oceanic crust. Continental crust is composed of various rocks, including granite, and is typically thicker and less dense than oceanic crust. It is primarily formed through the collision and accretion of tectonic plates over long periods of time.
Additionally, oceanic crust is also subject to subduction, where denser oceanic plates are forced beneath less dense continental plates. This process occurs at convergent plate boundaries. When oceanic crust subducts, it is eventually recycled back into the mantle, which contributes to the overall young age of the oceanic crust.
In summary, the continuous formation of new oceanic crust at mid-oceanic ridges, along with the subduction of older oceanic crust, results in the relatively young age of oceanic crust compared to the older continental crust.
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◘HURRY PLEASE◘
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Answer:
B
Explanation:
How are the agents of weathering similar and different.
Answer:
Water, ice, acids, salts, plants, animals, and changes in temperature are all agents of weathering. ... Rocks, such as lavas, that are quickly buried beneath other rocks are less vulnerable to weathering and erosion than rocks that are exposed to agents such as wind and water.
Physical weathering breaks down rocks without changing their proportion, whereas chemical weathering changes the ingredients that cause up the rocks. Depending on the chemicals used, the rock may completely disintegrate or simply become softer and more susceptible to other forms of weathering.
What is weathering?Weathering occurs when rocks, land formations, and minerals begin to break down and dissolve.
The process of erosion transports these broken bits away by wind or rain after they crumble.
Weathering agents include ice, salts, water, wind, and plants and animals. Road salt and acids are examples of chemical weathering because they contribute to the erosion of rocks and minerals.
Thus, these are some of the similarity and differences of weathering.
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Which phrase defines latitude?
A.height above sea level
B. north or south distance from the equator
C. east or west distance from London
D. rise and fall of the land
Answer:
b. is the answer.
Explanation:
I just took the test.
What allows the three atoms in a water molecule to stay together
Answer:
Three types of bonds hold atoms together within molecules: ionic, covalent, and polar covalent. ... Hydrogen bonds allow two molecules to link together temporarily. • Water molecules are made up of two hydrogen atoms and one oxygen atom, held together by polar covalent bonds.
Explanation:
Covalent bonds occur when two atoms—in this case oxygen and hydrogen—share electrons with each other. Thus, option A is correct.
What are covalent bonds?A covalent bond is the exchange of electrons between atoms. This type of bond occurs between two atoms of the same element or elements that are close to each other in the periodic table.
Strong linkages—called covalent bonds—hold together the hydrogen and oxygen atoms of individual H₂O molecules.
Because oxygen and hydrogen attract the shared electrons unequally, each end of the V-shaped H2O molecule adopts a slightly different charge.
Therefore, covalent bonds formed by shared electrons of hydrogen and oxygen atoms of individual H₂O molecules. Thus, covalent bond allows the three atoms in a water molecule to stay together. Thus, option A is correct.
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Your question is incomplete, but most probably your full question was,
What allows the three atoms in a water molecule to stay together ?
A. Covalent bonds formed by shared electrons
B. Covalent bonds formed by electrons that transfer between atoms
C. Ionic bonds formed by electrons that transfer between atoms
D. Hydrogen bonds formed only by the electrons of the hydrogen atoms
What happens to an atom if it gains an electron? *
A.It becomes negative
B.It becomes neutral
C.It becomes positive
D.None of the above
Answer:
It became negative
Explanation:
What most likely happened to a species that became extinct and are only found as fossils?
Answer:
Millions of years from now, paleontologists may dig into Earth and uncover fossils from our own time. They may, like scientists today, construct a chronology of what came before them, watching past species popping into—and later out of—existence. Today, humans are continually driving species to extinction—by one estimate, almost 500 vertebrate species have gone extinct in the past 100 years—but will those future scientists be able to tell? New research suggests that it might not be easy: Only a small proportion of these human-caused extinctions will leave behind a fossil trace—and the most threatened species are the ones least likely to be preserved for posterity.
The history of life on Earth is punctuated by what researchers call the “Big Five” mass extinctions, a group that includes the dinosaur-killing Cretaceous-Tertiary extinction and several other, even more severe, events. Many scientists now want to add a sixth: the one that humans are causing all over the globe today. But it’s hard to gauge just how severe the current extinction crisis is, compared with others in Earth’s sometimes tumultuous history. Modern extinctions are documented, sometimes in real time. But the Big Five are measured using only the fossil record, a history of those species that were buried and preserved by sediments over time.
That’s why Roy Plotnick, a paleontologist at the University of Illinois, Chicago, and lead author of the study, thinks about far-flung scenarios involving future paleontologists. “We really need to look at modern day extinctions as if they were in the fossil record already, in order to make a comparison,” he says. So he and his colleagues searched fossil databases for modern mammal species—both those threatened by extinction and those that aren’t—to see how many modern extinctions would be detectable by relying only on fossils.
Explanation:
