Answer:
Presence of predators.
Explanation:
Presence and absence of predators is the main cause of the presence of spines on stickleback fish populations because these spines helps in the protection against predators. The stickleback fish populations that lives in marine ecosystem have spines because there are many predators are present while on the other hand, stickleback fish populations of freshwater ecosystems have no spines due to no predator so they acquire the adaptation of having no spines.
In this exercise we have to explain the variations of the aquatic system, so we have to:
In this case, as long as a large increase in a specific population of fish takes place, we know that the predators of this system are needed.
What factors interfere in an ecosystem?They are:
Biotic factors: producing beings (plants and algae), consuming beings (herbivores and carnivores) and decomposing beings (fungi and bacteria). Abiotic factors: water, light (light energy), heat (thermal energy) and nutrients (chemical substances).See more about ecosystem at brainly.com/question/1673533
How is it possible for a mutation not to produce any visible effect in an
organism?
Answer:
Some mutations don't have any noticeable effect on the phenotype of an organism. This can happen in many situations: perhaps the mutation occurs in a stretch of DNA with no function, or perhaps the mutation occurs in a protein-coding region, but ends up not affecting the amino acid sequence of the protein.
25 POINTS + BRAINLYY PLS HELP
will give BRAINLIEST
question is in the pic
Plants:
1. Most plants respond to the environment by growing towards the light.
2. Plants respond to daily and seasonal cycles and diseases.
Flatworms:
1. Flatworms respond to changes in light.
2. Flatworms adapt to marine life by using diffusion to breathe and to distribute nutrients to other parts of the body.
Humans:
1. The nervous system allows an organism to respond quickly to changes in the internal or external environment.
2. Some humans modify the environment (positively or negatively), such as cutting forests, building dams, and expanding urban areas, etc.
HELP ME HELP ME HELP ME HELP ME
Assume that sound A has a decibel level of 10 and sound B has a decibel level of 30. How many times louder is sound B than sound A?
Answer:
3 times louder
Explanation:
10x3=30
If sound A has a decibel level of 10 and sound B has a decibel level of 30 then its a thrice time louder.
What is sound and types of sound?There are two types of sound:
Audible and Inaudible.Inaudible sounds are sounds that the human ear cannot detect.
Whereas human ear hears frequencies between 20 Hz and 20 KHz.
Thus, its a thrice time louder.
To learn more about sound click here:
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HELPPPP 30 PTS AND BRAINLY!!! 5 MULT. CHOICE PROBS WITH REASONING PLEASEE
Answer:
I know proteins are made in Ribosomes so I would say the Rough Enplopasmic whatchacall it
Explanation:
uhhh i took biology, sorry thats the only one i an help on its been a while
Question 3 of 20 -
0000 UNIT SCI07 408 SLPS2021
Question: 1-3
A biologist describes two modern-day species as "sharing a common ancestor." What does it mean when two species share a common ancestor?
Both species evolved from one species that lived in the past
One of the species evolved into the other species
The two species are actually the same species with genetic variation
The two species reproduced with one another and formed a common ancestor
Answer: C. is your answer
Explanation: It means the species shared a common ancestor in the recent past.
I need help please and thank you
1. According to the rules of carbon dating, how much time
passes during one half-life?
Answer:
5,730 yearsExplanation:5,730 years
How can polyploidy cause speciation in plants?
Plants can sexually reproduce only when they are polyploid. Having the condition is normal in plants.
Plants can asexually reproduce or pollinate themselves. This allows polyploid individuals to reproduce.
Plants can repair polyploidy and obtain healthy cells. This allows plants to survive and reproduce.
Plants are not affected by polyploidy. Plants with the condition can reproduce normally.
Plants can asexually reproduce or pollinate themselves. This allows polyploid individuals to reproduce, this results develop cause speciation in plants, hence option B is correct.
What is polyploidy in plants?Polyploidy, which occurs when two or more genomes fuse within one nucleus, causes each cell to possess more than two pairs of homologous chromosomes.
Most angiosperms exhibit polyploidy, which is crucial for the survival of the agricultural crops on which people depend.
Three or more sets of homologous chromosomes are present in polyploid plants. These plants' increased chromosome count is the outcome of a genome duplication event.
Therefore, plants can asexually reproduce or pollinate themselves. This allows polyploid individuals to reproduce.
Learn more about polyploidy, here:
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Answer:
Plants can asexually reproduce or pollinate themselves. This allows polyploid individuals to reproduce.
Explanation:
I just did the workbook.
Traits are based on improving what primary factor in organisms?
a. behavior
b. anatomy
c. fitness
d. physiology
Please help will mark brainlest
What is located at both of the poles on Earth
Answer: The North Pole lies in the Arctic Ocean while the South Pole is in Antarctica.
Why are pollutants more harmful to tertiary (top) consumers as opposed to producers?
Answer:
because making that substance is does not generate that much pollutants, but using that substance generates more pollution.Explanation:
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what is the function of the stratified squamous epithelium of this type of tissues
Answer:
The stratified squamous epithelium provides protection against mechanical stress, chemical abrasions, and even radiation. The keratinized epithelium present on the surface of the skin blocks out the harmful radiation and prevents the exposure of internal tissues and organs to the radiation.
Explanation:
¡I hope it helps you!
(No links)
Why is the element carbon so versatile? A. Carbon is an extremely small element,
B. Carbon can change the number of electrons that it contains,
C. Carbon has the ability to form many different types of structures and is very stable,
Answer:
deffo C :)
Explanation:
Most organisms have a fight-or-flight response when they sense danger. In mammals, two organ systems work together to produce this response.
Which of these body systems is involved in the information above?
Select one:
respiratory and circulatory
nervous and digestive
respiratory and excretory
nervous and endocrine
Answer:
Nervous and endocrine
Explanation:
The nervous system triggers the endocrine system to produce hormones that cause fight or flight
can y’all help me this one??
Question and answer are in there
Answer:
cold coastal area
Explanation:
since the hurricanes occur this often it must be in coastal area
Answer:
I believe it's warm coasted area, not entirely sure tho
Explanation:
PLEASE HELP ME WITH THIS BIOLOGY QUESTIONN :)) THANK YOUU
Answer:
B. Translation
Explanation:
Hope this helps!
Which of these are part of the respiratory system? (Select all that apply.)
larynx
sinuses
heart
lungs
Answer:
larynx, sinuses, lungs
Explanation:
Answer:
larynx, sinuses, lungs
I know this is old, but just in case anyone else needs it
How did scientists determine how old the ocean floor is?
O A. Watching it grow
O B. Testing radioactive materials
O C. Asking other scientists
O D. Making a guess
All of the humans in a particular city would be considered a population. True or False?
Answer:
The Answer is gonna be True:3
This is the right Answer :3
I hope you are having a great day ❤️❤️❤️❤️❤️
Which protist is considered to be the most complex and specialized?
A. Amoeba
B. Paramecium
C. Volvox
D. Euglena
Answer:
The answer is B. Paramecium.
Explanation:
A student drew models of an electromagnetic wave and a water wave. Which scientific question did the student MOST LIKELY ask to know how to draw these models? A. Do water waves travel at a slower speed than electromagnetic waves ? B. Can water waves and electromagnetic waves travel through different media? C. How do water waves and electromagnetic waves increase their amplitude ? D. Are water waves and electromagnetic waves examples of transverse waves ?
Answer:
answer is c
Explanation:
etc
I NEED IT NOWWW ASAP PLEASEE ITS A TEST
Plants with dark brown stems mated to ones with light colored stems: All offspring have a medium brown color.
C. Incomplete dominance
D. Polygenic
E. X-linked gene
B. Codominance
A.Dominant/recessive gene
Answer: could be Polygenic whish you the best in your test i had to take my test at home while everyone at school does it
Your friend Joe has a younger brother Sam and two older sisters. Sam has a strange disorder that has caused his hair to turn green. The doctor says that this is caused by a single gene that is inherited, and that boys are more likely to have green hair then girls. However Joe, his sisters, and both of his parents have normal hair color. Joe does not know much biology and is confused. Explain to Joe how his brother's condition could have arisen even though Joe has normal hair. Then discuss the likelihood that a) Joe, and b) Sam will have children with green hair. Assume that they both marry women with normal hair color. You will need to include information on meiosis and transmission of genes to assure that Joe understands. HINT: As part of your answer, indicate the percent of girls vs. boys that you predict would have green hair if fathered by Joe vs. Sam.
Answer:
The correct answer is - it is due to the case of sex-linked recessive disorder.
Explanation:
It is pointed out by the doctor that Sam has a condition due to recessive allele and it is given that boys have this condition more than girls which suggests that it is a sex-linked recessive disorder. This comes from their parents but it is given that the father has normal hair which means the father has no recessive allele, then it must come from the mother even mother has not this condition but she could be a carrier for this trait.
Joe and his sister do not have this condition as they get the normal dominant allele from mother and father.
The chances of being a carrier by his sisters are 50%. If Joe marries
IF Joe marries a non-carrier woman, he will have all normal children with no green hair. IF Joe marries a normal hair color carrier women then there would 25% chances of being diseased offspring and 50% chances of being a carrier, and if women is completely normal then all offspring will be normal.
carrier woman, his children will have a 25% chance of being green-haired. A 25% chance of being
IF Sam marries a normal woman, the children will have a 25% chance of being a carrier, a 25% chance of being green-haired, and a 50% chance of being normal.
REAL ANSWERS PLEASE !!!
Describe the steps of transcription
Answer
The various steps in the transcription and translation process of protein synthesis are described below.
Explanation:
Proteins (made up of amino acids) have an important role in the various functioning process of an organism. Protein synthesis which takes place in the cells of an organism consists of two major processes: transcription (DNA to RNA) and translation (RNA to protein).
Transcription: It is the first process in protein synthesis which occurs in the cell nucleus where a single-stranded messenger RNA (mRNA) is created using a DNA strand and the genetic instructions in DNA are transferred to this mRNA. The steps in transcription are initiation, elongation, and termination. The beginning process known as initiation occurs when an enzyme RNA polymerase binds to a promoter (region of a gene) and the DNA unwinds. One of the DNA strands acts as a template and the enzyme reads the bases in the template DNA strand.
The next step is elongation, where the RNA polymerase builds a strand of mRNA by the addition of nucleotides using complementary base pairs. Here, adenine (A) in the DNA binds to uracil (U) in the RNA. Termination is the last step in which the transcription process ends when the RNA polymerase comes across a termination sequence in the gene. Thus, the completed single-stranded mRNA detaches from DNA.
Translation: It is the second process in protein synthesis which occurs in the ribosome of the cell where the genetic information in mRNA is used to create a protein from amino acids. A triplet of nucleotides is called a codon and they define amino acids. There are 64 possible codons and the codon, AUG acts as the start codon which initiates translation in addition to specifying the amino acid methionine. In the initiation step, the first amino acid in the polypeptide chain is brought by transfer RNAs (tRNAs) to bind to the start codon of mRNA. During elongation, each type of tRNAs in the cytoplasm bound to a specific codon on the mRNA template and adds the corresponding amino acid to the polypeptide chain. Stop codons (UAA, UAG, or UGA) terminate protein synthesis and release the polypeptide.
What is condensation and what cycle is it a part of?
Which kind of map projection would you use to explore Antarctica?
Answer:
answer choices?
Explanation:
A(n)\ is an area of the planet that shaves similar conditions of climate, fauna (animal life), flora (plant life) and geography .
1.biome
2.environment
3.habitat
4.ecosystem
Morning glories are flowering vines that will climb up a trellis or other support by wrapping tendrils around it. What kind of tropism causes the morning glories to twine around the support this way?
A. phototropism, because the light pulls the morning glories upwards
B. gravitropism, because gravity helps the morning glories orient themselves in space
C. thigmotropism, because the morning glories twine around the support when they touch it
D. nutrotropism, because the curliness of the morning glories depends on the nutrients in the soil
PLEASE help me and quick
Explanation:
pretty sure its c also nice pfp 0_0