Answer:
A caldera
Explanation:
This forms when a volcano collapses in on itself.
Have a nice day and hope this helps.
Answer:
A caldera forms
Explanation:
Some researchers estimate that the mutation rate for any given gene (or its DNA) in certain strains of bacteria is about 108. This means that one error or mutation in a given gene is introduced for every 100-million cell divisions. What can cause mistakes in replication
Explain what factors can lead to genetic
variation within a population.
Answer:
Genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).
Hope this helped :)
A student is performing an investigation using rennin and milk. Rennin is an enzyme that can solidify milk. She
puts milk in three test tubes with rennin and places the tests tubes in water baths at different temperatures
of 32°F, 98°F, and 212°F. She notices the rennin enzymes become denatured at 212°F and do not solidify
the milk. Which statement correctly describes the effect of the denatured enzymes?
A. Denatured enzymes are slowly active.
B. Denatured enzymes are no longer active
C. Denatured enzymes reverse the reaction.
D. Denatured enzymes speed up the reaction.
Answer:
The correct answer is - option B. denatured enzymes are no longer active.
Explanation:
Denaturation of the enzymes or proteins results in changes in their original structure which ultimately results in the loss of their particular functions. The denaturation of proteins or enzymes takes place due to extreme temperature or pH which leads to a change in the active site of an enzyme.
Due to this change, the substrate will no longer fit in the active site and become inactive as enzymes work together with the substrate and the active site is the essential part of the enzyme for its activity. In this case, this is condition takes place which makes it denatured at 212 degrees F.
The map shows the location of Earth's principal biomes.
Which abiotic factor in tropical forests do boreal forests lack?
Answer:
warm temperature
Explanation:
I cannot see the choices in your image. I can only see choice A, which is "soil."
"Abiotic factors" are part of the ecosystem that don't have life. However, they have an impact on the life of the biotic factors (living organisms) in the environment. Examples of abiotic factors are: sunlight, temperature, climate, soil, humidity, wind, etc.
"Boreal forests" are abundant on the Earth's Northern Hemisphere. The climate here is generally cold, which doesn't allow some trees to survive. It is totally opposite to the warm temperature and high humidity that you can feel in the "tropical forests." Such factors allow many plants and animals to survive.
Clearly, the boreal forests lack the "warm temperature" that the tropical forests have.
a gorilla is an example of a producer, consumer, or decomposer?
Answer:
It would be A or B. I'd go with B.A gorilla is both a Producer and Consumer, since it can produce kids, and it can eat.
explain the concept of linkage. if you performed a test cross with a fruit fly that is heterozygous for two genes how could you conclude that the two genes are linked
Answer:
The correct answer would be - the ratio of phenotypes in an organism cross will tell if the genes are linked or not.
Explanation:
In this question, we perform a test cross with a fruit fly that is heterozygous If we perform a test cross between two parents with identical heterozygous genomes AaBb.
If there is no recombination found in the offspring of this cross it means there are no linkage of genes present. And if there are new or recombinant phenotypes present it means that there are genes linked together.
(60 POINTS) When an insect becomes trapped in a spider's web, the spider moves towards the insect. The spider could be alive because it displays
which sign of life?
A. information system
B. growth and development
C. response to environment
D. reproduction
Answer:
B. growth and development
Explanation:
im just guessing so i cant say for sure hope this helps tho
Answer:
B
Explanation:
During World War I, the most important product of ABE fermentation was:
Glycerol
Acetone
Butanol
Ethanol
Answer:acetone
Explanation: ABE fermentation produces acetone, butanol and ethanol, but the most important product was acetone, used in cordite manufacture.
If the DNA integrates properly into the germ cells, the adult fly will contain _________________ that contain _____________________________. After mating, these flies can then produce progeny that will contain ______________________.
Answer:
Five pairs of autosomal and one pair of heterochromatic sex chromosomes.
Explanation:
The adult fly will contain 12 number of chromosomes that contain five pairs of autosomal and one pair of heterochromatic sex chromosomes. After mating, these flies can then produce progeny that will contain diploid i. e. double number of chromosome. One set of half chromosomes from the male fly while the other half chromosomes comes from female fly so the offspring will receive double number of chromosomes.
Describe Ted Bundy’s childhood and his relationship with his family.
Answer:
Bundy was born at a home for unwed mothers in Burlington , Vermont, on November 24, 1946. He remained there for two months after his birth. His mother, Eleanor Louise Cowell, known as Louise, considered placing her baby up for adoption, but her father, Sam Cowell, apparently wanted the baby to join the family in Philadelphia. HOPE THIS HELPSSSSS!
Explanation:
which diagram A or B represents the plant cell
Answer:
the answer is a
Explanation:
i pretty sure
Levels of Organization (Smallest to Largest)
Cell
Organ
Organism
Organ system
Tissue?
Answer:
cell,tissue,organ,organism,organ system
Explanation:
this is the correct level of organisation
In a study of a muscle disorder, several families exhibited vision problems, muscle weakness, and deafness. Analysis of the mtDNA (mitochondrial DNA) from affected persons in these families was analyzed using PCR (polymerase chain reaction) and gel electrophoresis. The unaffected samples were collected from multiple mitochondria, whereas each affected sample was collected from a single mitochondrion. What can you conclude about the affected individuals' mitochondrial DNA?
A. There is no common deletion.
B. There is one common deletion.
C. There are two common deletions.
D. There are more than two common deletions.
Answer:
A. There is no common deletion.
Explanation:
The correct answer to the given question is the option A. There is no common deletion.
In the study of the muscle disorder, the samples taken and the effects observed concludes that there was no common deletion among the analysed families and their mitochondrial DNA.
is the study of how traits are passed from parents to offspring.
OA) Fertilization
O B) Genetics
O C) Seed production
O D) Selective breeding
Answer:
D) Selective
breeding
Explanation:
Mark me as brainlist
what will happen if nondisjunction wee to take place at anaphase 2
which among the 7 theories on the origin of life would you
believed as true?
Answer:
Life on Earth began more than 3 billion years ago, evolving from the most basic of microbes into a dazzling array of complexity over time. But how did the first organisms on the only known home to life in the universe develop from the primordial soup?
One theory involved a "shocking" start. Another idea is utterly chilling. And one theory is out of this world!
Inside you'll learn just how mysterious this all is, as we reveal the different scientific theories on the origins of life on Earth. Electric sparks can generate amino acids and sugars from an atmosphere loaded with water, methane, ammonia and hydrogen, as was shown in the famous Miller-Urey experiment reported in 1953, suggesting that lightning might have helped create the key building blocks of life on Earth in its early days. Over millions of years, larger and more complex molecules could form. Although research since then has revealed the early atmosphere of Earth was actually hydrogen-poor, scientists have suggested that volcanic clouds in the early atmosphere might have held methane, ammonia and hydrogen and been filled with lightning as well.
The deep-sea vent theory suggests that life may have begun at submarine hydrothermal vents spewing key hydrogen-rich molecules. Their rocky nooks could then have concentrated these molecules together and provided mineral catalysts for critical reactions. Even now, these vents, rich in chemical and thermal energy, sustain vibrant ecosystems.
The next idea is a chilling thought. Read on!
Ice might have covered the oceans 3 billion years ago, as the sun was about a third less luminous than it is now, scientists say. This layer of ice, possibly hundreds of feet thick, might have protected fragile organic compounds in the water below from ultraviolet light and destruction from cosmic impacts. The cold might have also helped these molecules to survive longer, allowing key reactions to happen. [Related: The Ingredients of Life]
Understanding life’s origin may involve unravelling the mystery of DNA's formation, as we explain next.Nowadays DNA needs proteins in order to form, and proteins require DNA to form, so how could these have formed without each other? The answer may be RNA, which can store information like DNA, serve as an enzyme like proteins, and help create both DNA and proteins. Later DNA and proteins succeeded this "RNA world," because they are more efficient.
RNA still exists and performs several functions in organisms, including acting as an on-off switch for some genes. The question still remains how RNA got here in the first place. And while some scientists think the molecule could have spontaneously arisen on Earth, others say that was very unlikely to have happened. Other nucleic acids other than RNA have been suggested as well, such as the more esoteric PNA or TNA.
A study in 2015 suggests the missing link in this RNA puzzle may have been found.
Instead of developing from complex molecules such as RNA, life might have begun with smaller molecules interacting with each other in cycles of reactions. These might have been contained in simple capsules akin to cell membranes, and over time more complex molecules that performed these reactions better than the smaller ones could have evolved, scenarios dubbed "metabolism-first" models, as opposed to the "gene-first" model of the "RNA world" hypothesis.
The final theory is truly out of this world. Perhaps life did not begin on Earth at all, but was brought here from elsewhere in space, a notion known as panspermia. For instance, rocks regularly get blasted off Mars by cosmic impacts, and a number of Martian meteorites have been found on Earth that some researchers have controversially suggested brought microbes over here, potentially making us all Martians originally. Other scientists have even suggested that life might have hitchhiked on comets from other star systems. However, even if this concept were true, the question of how life began on Earth would then only change to how life began elsewhere in space.
Oh, and if you thought all that was mysterious, consider this: Scientists admit they don't even have a good definition of life!
Which kind of energy propels a sailboat? A) chemical energy , B) electrical energy, C) mechanical energy, D) thermal energy
Answer:
It is C or D but most likely C
Explanation:
Which three statements make up the law of gravity?
O A The strength of the gravitational force between two objects
decreases as the distance between their centers increases.
B. Matter attracts all other matter in the universe.
C. No matter where you are in the universe, you will always have the
same weight
D. The strength of the gravitational force between two objects
increases as the total mass of the objects increases
A, B and D
Explanation:
HELP PLS <3
What evidence does the diagram provide that humans and kangaroos have evolved from a single common ancestor? (3)
Answer:
Their backbones and chest bones are same.
UNDERSTANDIN
Multiple Choice
5 Which of the following is a character-
istic of all animals?
a. asexual reproduction
b. producing their own food
c. having many specialized parts
d. being unable to move
Why would looking for the persons responsible for sneaking endangered species (rare birds, for example) into the United States be considered a job for a forensic scientist
Answer:
Forensic scientists are able to find the answer.
Explanation:
The persons responsible for sneaking endangered species into the United States be considered a job for a forensic scientist because forensic scientist is able to find out the persons. Forensic scientist are the investigators who collect evidences from the crime scene and leads to the person who commit crime. So the forensic scientist is the only person who find out the persons responsible for sneaking endangered species.
Will give brainliest
Which of your plants was a dicot? Which was a monocot? How could you tell?
PLANTS :
Sunflower
Pansies
HYdrangeas
Answer: Sunflower : Dicot, Pansies : Dicot, Hydrangeas: Monocots.
Explanation:
Within the plant kingdom, seed-bearing plants are divided into gymnosperms and angiosperms. Angiosperms are the group of plants that have flowers, within which we have monocotyledons and dicotyledons or eudicotyledons. A cotyledon is a leaf-like structure found on the seed so it is an embryonic leaf. Its function is to absorb nutrients in the seed until it develops true leaves that will allow to perform photosynthesis.
Monocotyledons are flowering plants whose seeds have one cotyledon. Dicotyledons are flowering plants whose seeds have two lateral cotyledons. Both monocot and dicot seeds have an embryo plant, a coat, and is able to store nutrients.
The true leaves monocots will be thin and long, while dicot leaves will be broad. Another characteristic is that the major veins of monocots are parallel and stripe-like while the dicot veins branch out. Also, monocots have flower parts in multiples of 3 while dicot flower parts are produced in multiples of 4 and 5. Roots in monocots sprout from many parts of the plant while dicot roots develop only from the radicle, which is the first part of a seedling to emerge during germination. This means monocots do not have secondary growth and dicots usually produce secondary growth.
Sunflower : Dicot, because it shows two cotyledons when the seed germinates.Pansies : Dicot, because it has 5 leaves. Hydrangeas: Monocots, they only have one cotyledon.Select the word or phrase that best completes each of the sentences below.
The smallest units of life are called
is the process of creating new living things.
is the phenomenon of living things responding to their environment
Answer:
1. CELL
2. REPRODUCTION
3. IRRITABILITY
Explanation:
1. All living organisms are composed of CELLS, which according to the cell theory as proposed in the 1800's is the smallest structural and functional unit of life.
2. REPRODUCTION is a characteristics possessed by all living things. It is the process whereby living organisms/things create new living things.
3. IRRITABILITY is another characteristics of living things, which is the process whereby living things respond to changes in their environment called STIMULUS e.g heat, nutrient stress e.t.c.
Particles of gas is widely seperated
True
False
Answer and I will give you brainiliest
I think
Explanation:
true is right ans
Answer:
True
Explanation:
The figure below shows an experiment on photosynthesis. Rebecca observed that the part of the leaf outside the bottle showed the presence of starch in it. The part of the leaf inside the bottle did
not show the presence of starch. When the same experiment was repeated without potassium hydroxide (KOH) in the bottle, the whole leaf showed the presence of starch.
KOH
Water
What can Rebecca correctly infer about potassium hydroxide?
SC.912.L.18.9
It absorbs carbon dioxide.
It releases oxygen.
Ο Ο Ο Ο
It produces water
It dissolves cells.
Answer:It releases oxygen
Explanation: I took the test
Species that only use asexual reproduction only develop new genetic combinations through the process of mutation.
A. True
B. False
Yes, this is true, because in asexual reproduction there is very little genetic diversity, except in the case of a mutation.
what is heat? please help
Answer:
I am pretty sure its thermal energy but you might have to check that
Cordite required ethanol.
O True
O False
Answer:
False I believe I just went in quizzlet
Which of these are components of DNA? Select five options.
deoxyribose sugar molecules
ribose sugar molecules
adenine
phosphate molecules
ribosome
cytosine
thymine
Answer:
deoxyribose sugar moleculesphosphate moleculescytosine thymineadenineAnswer:
phosphate
adenine
cytosine
thymine
deoxyribose sugar molecules
these are the components or dna
does humans produce two types of cells
Answer:
yes
Explanation:
they are :
somatic cellgerm cell