What
causes the cell cycle to stop?
Answer:
Cells – except for cancerous ones – cannot reproduce forever. When aging cells stop dividing, they become “senescent.As telomeres dwindle, cell division stops altogether.
Explanation:
Select the correct statement(s) about angiosperm seeds. Select all that apply. Select all that apply. The embryo in an angiosperm seed is the offspring of the sporophyte plant. All structures in an angiosperm seed are diploid. An angiosperm seed contains structures contributed by three generations of plants.
Answer:
An angiosperm seed contains structures contributed by three generations of plants.
Explanation:
The spermatophytes, also known as phanerogams, represent a group of seeded plants that have developed special structures for reproduction. This group (spermatophytes) consists of gymnosperms or 'naked seeds', and angiosperms or 'enclosed seeds'. The seed is an organ generated from the ovule after fertilization by the pollen grain, which gives rise to a seedling during the process of germination. In flowering plants, seeds are generated by a process of double fertilization and consist of three tissues: 1-an embryo (generally diploid) formed by repeated mitotic division of the zygote cell, 2- an endosperm tissue (generally triploid, 3n) that nourishes the embryo during its growth, and 3-a seed coat generated from the integuments of the ovule. In angiosperms, seeds consist of three generations: the gametophyte that provides nutrients to the embryo, the embryo, and the seed coat which is generated from the parental tissue (sporophyte).
Mankind has used biotechnology in agriculture, food production, and medicine for thousands of years. As advances are made in biotechnology, it is important to make informed decisions in order to avoid the hazards associated with which of the following?
Answer:
D dangerous organisms
Explanation:
i’m almost 100% positive if not then it’s probably A global warming
Imagine sperm and egg cells have 46 chromosomes like other cells in the body. That
is they have 46 chromosomes when a sperm cells fertilizes an egg cell. Would that
affect the total number of chromosomes in their offspring or children? Tell why or why
not.
Answer:
When an egg and sperm having 46 chromosomes similar to the body cells, their fertilization produces offsprings or children with 92 chromosomes which are double number of chromosomes as compared to parent cell. So they are not similar to parents. As we know that fertilization is the process of fusion of gametes and paring up of chromosomes. The offsprings are different from their parents in having more chromosome sets.
Explanation:
discuss why apes are considered the most closely related organisms to humans. Use evidence to back up your answer.
Answer:
Apes are considered the most closely related organisms to humans because we share so much dna. For example, we share 99% of our DNA with Chimpanzees. On average, human beings share 65% of our dna with other mammals but apes are a much higher percentage, on average in the higher 90's.
Explanation:
Answer and I will give you brainiliest
**Please only surely answer**
Answer:
Semicircular canals
Your welcome!!
10. Imagine a seesaw, like on a children's playground. Which of the following drawings of a seesaw best represents equilibrium? Explain. help pleaseee
Answer:
the first one
Explanation:
equilibrium- a state of physical balance.
so the first one looks the most balanced on both sides
Also if you look up "equilibrium seesaw" you see pictures that look similar to the first one
If the anticodon of a molecule of tRNA has the sequence GAU, what was the original DNA sequence?
Answer:
CTA
Explanation:
DNA to RNa
A---> T
C--> G
RNa to dna
A--> U
C---> G
If the anticodon of one molecule of tRNA contains the sequence GAU, then CTA was the original DNA sequence.
What is DNA sequencing?
DNA sequencing is defined as the laboratory procedure used to determine the exact sequence or order of the four building blocks or bases that make up DNA. Information that is stored in DNA in a code which is formed by arranging the four bases which are adenine, cytosine, guanine and thymine which are identified by letters A, C, G and T in different order.
Within double-stranded DNA, nitrogenous bases on one strand pair with complementary bases on the other strand. A always pairs with T, and C always pairs with G, during DNA replication, the two strands separate into a double helix.
Sequence of tRNA is GAU, so the DNA sequence is CTA as C complements to G, A to T and U to A as in RNA Uracil is present in the place of thymine.
Thus, if the anticodon of one molecule of tRNA contains the sequence GAU, then CTA was the original DNA sequence.
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A protein isolated from a thermophilic bacterium shows a molecular weight of 160 kD when eluted from a size-exclusion chromatography column, but when the purified protein is run on an SDS-PAGE gel, a single band of 80 kD is observed. These results tell us that the protein is eluting from the size-exclusion column as a
Answer:
as a dimer consisting of two identical monomers (80 kDa subunits) that are packed together via hydrophobic interactions
Explanation:
SDS-PAGE (sodium dodecyl sulphate–polyacrylamide gel electrophoresis), is an electrophoretic methodology used to separate proteins that have a molecular weight between 5 to 250 kDa. SDS is a well-known ionic detergent that is able to break hydrophobic interactions and hydrogen bonds. Moreover, size-exclusion chromatography is a filtration technique that separates molecules in solution according to their molecular size. In this case, SDS-PAGE showed that the target protein is composed of two identical subunits (monomers) of 80 kDa each, which were separated by the detergent and formed one single band in the SDS-PAGE gel.
Which of the following is not a step of Natural Selection?
Overpopulation
Survival of the Fittest
Underpopulation
Variation
Answer:
im pretty sure it is underpopulation.
Answer:
I think it's B. survival of the fittest since it's mostly just a phrase people say. I don't think underpopulation because, I'm pretty sure that's used when there not enough of an animal in an area, so while it could be the answer I don't think it is. And overpopulation is used when there's to much of an animal in an area so like with underpopulation it could be the answer but I do not think it is. And Variation is a step in Natural Selection so that's definitly not it. So since Survival of the fittest is mostly just a phrase people say I think that's the answer. Sorry for wasting your time if I'm wrong.
Short tails (T) are dominant to long tails (t). What is the probability of a long-tailed mouse in the cross Tt x tt?
25%
50%
O 75%
O 100%
Answer:
50%
Explanation:
if you do a punnett square you get two Tt and two tt. so two tt is half, which means half will be long-tailed tt, so 50%
50% of the mouse offsprings will have long tail.
According to this question, a gene coding for tail length in mouse is involved. The allele for short tails (T) are dominant to long tails (t). In a cross between Tt (short tail) × tt (long tail), the following gametes will be produced by each parent: Tt - T and ttt - t and tCrossing these gametes in a punnet square (see attached image), the following offsprings of mouse will be produced: Tt, Tt, tt and tt. Tt (2) = Short tail mice (50%)tt (2) = long tail mice (50%)Therefore, 50% of the mouse offsprings will have long tail.Learn more at: https://brainly.com/question/478887?referrer=searchResults
Which of the following can Jamie offer as evidence that supports the cell theory, based on these slides?
SC.912.L.14.1
All cells come from parent cells that exchange DNA.
All living things are composed of single cells or multiple cells.
All cells grow and develop until they reach a certain size, at which point they die.
All cells are equipped with structures that enable motion, such as pseudopods or flagella.
All living things are composed of single cells or multiple cells. Therefore, option B is correct.
What is cell theory?Cell theory is given by Schleiden and Schwann. According to this theory, cells make up every biological entity; they are the basic building block of life, and all life originates from earlier forms of life. Today, the cell idea has become one of the guiding concepts of biology due to its widespread acceptance.
A cell is the lowest form of life. This indicates that a cell cannot be divided into smaller units and yet be considered to be alive. An entire organism, such as a person, can be divided into smaller parts, such as organ systems, organs, and tissues.
Organisms can be unicellular or multicellular. Therefore, option B is correct.
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What is a model..???
Answer:
two definitions 1 a person trying in something to show pepole like dresses
2 a modle in science so scienntist can see and go wow this is what it is like the dinosur museum the t rex is a modle of how it would look like
Explanation:
hope it helps keep on questioning on lol
Which scenario describes a relationship of predator-prey?
Birds feed off the insects that are stirred up from the grasses as cattle move through.
A polar bear catches a seal for dinner.
A tapeworm latches itself in the intestines of a rat, feeding off all the nutrients eaten by the rat.
Oxpecker birds eat parasitic ticks off the backs of zebras.
Answer:
A polar bear catches a seal for dinner
Explanation:
Name 4 body structures composed of protein
I need to answer ASAP Pls
Answer:
separate during meiosis l
Explanation:
yan Napo Ang answer Sana makatutulong
A phenotypic ratio of 9:4:3 is indicative of __________.
A. Codominance
B. Polygenic inheritance
C. Epistasis
D. Multiple alleles
Answer:
a
Explanation:
The phenotypic ratio is the depiction and the relation of the occurrence of the phenotype in the offspring. The phenotypic ratio of 9:4:3 indicates codominance. Thus, option A is correct.
What is codominance?Codominance is the inheritance where both the recessive and the dominant allele are expressed in the offspring independently to produce the individual with the expression of both the trait separately.
The blood group, eye color, roan cattle, flower colors, sickle-cell anemia, etc., are some examples that show the pattern of codominance. The phenotypic ratio suggests the occurrence of the physical traits in the offspring that are visible.
In codominance, the phenotypic ratio is 9:4:3 as both the traits possessing alleles are independently expressed in the next generation.
Therefore, 9:4:3 is the phenotypic ratio of codominance.
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Which biogeochemical cycle includes the exoskeleton and shells of marine organisms as a reservoir?
A.
carbon
B.
nitrogen
C.
sulfur
D.
oxygen
(its not oxygen)
Answer:
I think it is oxygen
Hope this helped
ALL THE BEST !!
How do the different components of the system interact? How do organisms live, grow, respond to their environment, and reproduce?`
Which of the following is table sugar?
glucose
fructose
sucrose
galactose
lactose
Answer:
sucrose & galactose
In one or two paragraphs, compare and contrast surface ocean currents and deep water ocean currents in terms of causes and characteristics.
Please!!!
Answer:
Surface ocean currents
Surface currents refer to movement of the top layer of ocean water. Surface water flows in to replace the sinking water, which in turn becomes cold and salty enough to sink.
examples of surface ocean currents are California Current (Cal) in the Pacific ocean basin and the Canary Current (Can) in the Atlantic ocean basin.
Deep ocean currents
Deep-water currents describe water movement patterns far below the ocean’s surface and the influence of the wind. When ocean water freezes, forming sea ice, salt is left behind causing surrounding seawater to become saltier and denser. Dense-cold-salty water sinks to the ocean bottom.
What describes gneiss?
Gneiss is a high grade metamorphic rock, meaning that it has been subjected to higher temperatures and pressures than schist. It is formed by the metamorphosis of granite, or sedimentary rock. Gneiss displays distinct foliation, representing alternating layers composed of different minerals.
Gneiss is a type of metamorphic rock that is formed by high pressure and temperature caused by the earth's surface.
What are metamorphic rocks?Metamorphic rocks are those rocks that are formed when other rocks are introduced under high temperatures and pressure that is exerted by the layers of the earth. There are three types of metamorphic rocks.
Since gneiss is a high-grade metamorphic rock, it has undergone more intense heat and pressure than schist. It is created through the transformation of sedimentary rock, such as granite.
Gneiss has distinctive foliation or alternate layers made of various minerals. This rock comes under the metamorphic regional type of rock.
Therefore, Gneiss rocks are those metamorphic rocks that are formed on convergent plate boundaries.
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Which of these is NOT a job of the root of the plant?
A.
to hold the plant in place
B.
to make food
C.
to take in water and minerals from the soil
Answer:
"The roots of the plant do not make the food. Thus, the answer to this question is letter B. The roots hold the plant in place and through them the minerals and water from the soil. The roots is also involved in the vegetative reproduction and competitions with other plants."
Answer:
B. To make food.
Explanation:
The roots of a plant take water and minerals from the soil but they are not responsible for making the food for the plant. The roots supply what is needed to do so.
What happened during the Industrial revolution video?
Answer:
I need a link to watch the video
Answer:
Here's is your ans pic
Explanation:
Tq
Fill in the blank with correct term or phrase to complete each sentence.
19. In eukaryotes, transcription takes place in the________
20. Transcription begins when________
binds to the gene's promoter.
21. RNA polymerase adds complementary_________
as it "reads" the gene.
22.
___________is a strand of nucleotides that carries the DNA message from the nucleus to the ribosomes.
23.
_____________are the part of DNA that is transcribed into mRNA.
24.
______________are the part of DNA that is not transcribed into mRNA.
Answer:
19) nucleus
20) RNA polymerase
21) DNA / RNA nucleotides
22) The mRNA molecule
23) Templates
24) Introns
Explanation:
5. Dieting often leads to weight gain.
True
False
Answer:
the answer is false. Dieting usually leads to weight loss.
If something is at risk of dying out, it is:
O
extinct
O endangered
Is a dead tree made up of cells
Answer:
im 99% eveything is
Explanation:
Select the correct text in the passage.
Pick out the sentences that correctly describe marine mammals.
Marine mammals are endothermic, or warm-blooded. Species such as whales breathe air though their gills. They have a thick layer of blubber
that helps maintain buoyancy. They can stay underwater indefinitely. Dolphins are a type of toothed whale. Baleen whales feed on large fish
and sometimes seals.
Marine mammals are endothermic. I think that's the correct answer 'cause they can produce their own body heat (which therefore means that they are warm-blooded) and they can keep at a stable temperature even in harsh conditions. Plus, whales don't have gills b/c they are mammals (and mammals don't have gills), not all mammals have blubber (it's mainly penguins and seals), marine mammals can stay underwater for a long amount of time...but they eventually need to come up for air, and baleen acts like a "filter"; it "filter" and separates the water from the krill/microorganisms.
Hope this helps! :)
Pls help me..........
Answer:i got u
Explanation:
Answer:
what in the world am I supposed to find
