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[b] The sporangia are knob-like structures.
They are present at the top of the thread-like structures called hyphae.
They are dispersive, i.e. they are scattered by rain, wind or insects.
Which of the following best explains the endosymbiosis theory of how eukaryotic cells originated, as shown below? A.Eukaryotic cells developed from mutations in prokaryotic cells
B.Eukaryotic cells developed from organic compounds carried to Earth by debris from space
C.Eukaryotic cells originated from a combination of gases and heat in the atmosphere
D. Eukaryotic cells were originally large prokaryotic cells that absorbed smaller prokaryotic cells
Answer:I’m sure the answer is D
Explanation:
All eukaryotes evolved from prokaryotes and eventually developed into mitochondrial organelles.
The endosymbiotic theory represents that some of the organelles in eukaryotic cells were prokaryotic microbes at some time. As per the endosymbiosis theory the eukaryotic cells were at first large prokaryotic cells that absorbed smaller prokaryotic cells.
What is endosymbiosis?Endosymbiosis is the engulfing of the cell by another one to produce, over time, a coevolved relationship in which none of the cell could survive alone.
It is an evolutionary theory that guides the origin of eukaryotic cells by prokaryotes.
Eukaryotic cells were previously large prokaryotic cells that actually absorbed smaller prokaryotic cells
Thus, the correct option is D.
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Please help whoever’s right will get brainliest :)
Answer:
Cell Theory
1. All living organisms are made of cells
2. Cells arrive from previously existing cells
3. Cells are the basic unit of structure...
Explanation:
Which factors affect natural selection?
1. inheritance, isolation, adaptation
2. variation, overpopulation, adaptation
3. isolation, overpopulation, speciation
4. variation, inheritance, speciation
Answer:
The correct answer is B) Variation, overpopulation, and adaptation
Explanation:
Edge 2021
Variation, overpopulation and adaptation are the factors that affect natural selection.
What are the factors that affect natural selection?A mechanism that makes the populations of living things to change with time is natural selection. For natural selection to take place, four conditions are required to occur:
ReproductionHeredityVariation in organismVariation in individual charactersSome of the factors that affect natural selection are:
Overpopulation or overproductionVariationCompetitionAdaptationFor natural selection to occur, there should be higher reproductive success as well as variability. Ultimately, natural selection makes individuals within a population to adapt with the changing environment.
Thus, the correct answer is option 2.
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When chromosomes do not separate you end up with a
gamete with to many or to few chromosomes. This is known
as...
Answer:
The phenomenon of unequal separation in meiosis is called nondisjunction. If nondisjunction causes a missing chromosome in a haploid gamete, the diploid zygote it forms with another gamete will contain only one copy of that chromosome from the other parent, a condition known as monosomy. I think sorry if wrong ;)
What are the products of meiosis? Click ALL correct options. Sperm cells 4 cells Unique/ditieren cells Egg cells 2 cells
Can someone help me on this question for brainliest please.
two similarities between mesozic and Cenozoic era on the basis of evolution
Answer:
Similarities between mesozoic era and cenozoic era are defined below :
- Mesozoic era and Cenozoic era both started to evolve right after the mass extinct according to the sources of evolution.
- Mass extinction is stated as (K-extinction) and many of the major life forms evolved during these two eras.
- Fossils of birds and reptiles were found in Mesozoic era and Fossils of mammals were found in the Cenozoic era.
Explanation:
Thanks for asking the question
Which structure forms the outer wall of a mollusk's body and protects its internal organs?
-mantle
-foot
-gill
-shell
Answer:
mantle
Explanation:
just did this question
Answer:
The answer is mantle
Explanation:
What does the field of biology study
Answer:
Field biology is a sub-discipline of biology that focuses on different levels of biological organization such as organism, population, community, and ecosystem. As its name suggest, this field requires researchers to spend time in remote areas in order to observe a variety of organisms.
Explanation:
Biologists study the structure, function, growth, origin, evolution and distribution of living organisms. There are generally considered to be at least nine "umbrella" fields of biology, each of which consists of multiple subfields.
Answer:
Living organisims
Explanation:
Complete the sentences. Each term may be used more than once.
a. In a circular bacterial chromosome, the structure of DNA is a____________ double helix.
b. If DNA is twisted in the_________ direction, it becomes overwound.
c. Overwinding results in____________supercoiling.
d. If DNA is twisted in the_________ direction, it becomes underwound.
e. Underwinding results in____________ supercoiling.
f. One effect of_________ supercoiling in bacterial chromosomes is to promote separation of the two strands of DNA in the double helix.
Answer:
The correct answer is -
1. right-handed
2. right-handed
3. positive
4. left-handed
5. negative
6. negative
Explanation:
In a circular bacterial chromosome, the structure of DNA is a right-handed double helix In a circular bacterial chromosome.
If DNA is twisted in the right-handed direction, it becomes overwound. Overwinding results in positive supercoiling takes place. If DNA is twisted in the left handd direction, it becomes underwound. Underwinding results in negative supercoiling.
f. One effect negative supercoiling in bacterial chromosomes is to promote separation of the two strands of DNA in the double helix
Which of these organisms can make glucose?
A. Human
B. Mushroom
C. Poison Ivy
D. Sea slug
Poison Ivy. They are plants and can make their own food aka Glucose.
What are the three forces that affect wind?
Answer:
Pressure gradients, the rotation of the earth, and friction are three primary variables that influence the wind. Atmospheric pressure gradients are the ultimate source of wind. The wind blows from high-pressure zones to low-pressure areas.
OAmalOHopeO
Bison in Yellowstone National Park have a food-limited carrying capacity that determines how their population grows. If the population grows too large, some bison will either starve or migrate to search for more food. The park is able to support a maximum population of 4,500 bison. Park conservation officials must watch the population and prevent the bison from overpopulating, since they would migrate to nearby farms, causing agricultural damage and creating hazards to drivers. The bison begin to migrate when the population reaches 4,000 because of competition for food. If the current population size of bison is 3,652 and the maximum growth rate of the population is 0.28, calculate the population size after one year and determine whether the park will need to take measures to control the population.
A. The population will be 3,845 after a year. The bison will not pose a problem until the following year, and no conservation action will need to take place.
B. The population will be 4,675 after a year. Some bison will need to be removed to prevent migration, since they will surpass the resource availability.
C. The population will be 1,023 after a year, since the growth rate is too low. Conservation efforts will need to focus on increasing the bison population.
D. The population will be 4,500 after a year. The bison cannot exceed the carrying capacity, so they will stop reproducing. Some bison will need to be removed.
Answer:
A. The population will be 3,845 after a year. The bison will not pose a problem until the following year, and no conservation action will need to take place.
Explanation:
The exposed example refers to a population that exhibits a logistic growth model, Where the principal limiting factor is food availability
N is the total size of the populationNt the population size after a T timeK the carrying capacityr the population growth rate per capitaWhen N < K the population has not reached the maximum size that can be supported by the environment. It can increase in size.
When N = K the population has reached the maximum size that can be supported by the environment. It can not grow anymore. The population reached a maximum point delimited by available resources, such as food
When N > K the population has supered the maximum size that can be supported by the environment. It must decrease in size. because there are not enough resources.
To calculate the population size after one year, we need to use the following equation.
N t+1= Nt+rN(1-N/K)
Available data:
K = 4500
N = 3652
r = 0.28
Nm= 4000
N/K = 3652/4500 = 0.8115
r.N = 0.28 x 3652 = 1022.56
N t+1= Nt+rN(1-N/K)
N t+1= 3652+1022.56(1-0.8115)
N t+1= 3652+1022.56(0.1885)
N t+1= 3652+192.753
N t+1= 3844.75
rounding up to 3845
1. Which genotype(s) and phenotype for fur length are dominant?
2. Which genotype(s) and phenotype for fur length are recessive?
Complete question:
You will find the complete problem in the attached files, where all the proposed crosses are detailed.
Answer:
1. Which genotype(s) and phenotype for fur length are dominant?
Genotype: FF + FfPhenotype: Short fur2. Which genotype(s) and phenotype for fur length are recessive?
Genotype: ffPhenotype: Long furExplanation:
Available data:
F is the dominant allele that codifies for short furf is the recessive allele that codifies for long furCROSSES:
1) Test One: If I breed a short fur, FF female with a short fur, Ff male, then I will expect to see what type of offspring?
all short fur; some short and some long fur; all long fur offspring.Cross: FF x Ff
Gametes) F F F f
Punnet square) F F
F FF FF
f Ff Ff
F1) Genotype:
2/4 = 1/2 = 50% FF
2/4 = 1/2 = 50% Ff
Phenotype:
4/4 = 100% Short-fured individuals
2) Test Two: If I breed a short fur, Ff female with a short fur, Ff male, then I will expect to see what type of offspring? Pick 1)
all short fur; some short and some long fur; all long fur offspring.Cross: Ff x Ff
Gametes) F f F f
Punnet square) F f
F FF Ff
f Ff ff
F1) Genotype:
1/4 = 25% FF
2/4 = 1/2 = 50% Ff
1/4 = 25% ff
Phenotype:
3/4 = 75% Short-fured individuals
1/4 = 25% long-fured individuals
3) Test Three: If I breed a long fur, ff female with a long fur, ff male, then I will expect to see what type of offspring? Pick 1)
all short fur; some short and some long fur; all long fur offspring.Cross: ff x ff
Gametes) f f f f
Punnet square) f f
f ff ff
f ff ff
F1) Genotype:
4/4 = 100% ff
Phenotype:
4/4 = 100% long-fured individuals
Answer:
Here is an example of my Heredity Lab Report for FLVS if anyone needs it.
Explanation:
(it is a link)
The sound which does not have a pleasant sensation on the ear is
(1 Point)
Answer:
Tinnitus
Explanation:
The sound which does not have a pleasant sensation in the ear is known as Noise. It is also known as Tinnitus.
What is a pleasant sound called?A pleasant sound is called a piece of music. The pleasant sounds are termed music whereas unpleasant sounds are called noise. Pitch and loudness are the characteristics of sound. Pleasant sounds are those that human beings love to listen to. It basically includes the following:
Music sound from Harmonium.Song sounds from a human being.Bird's sound in the morning.Slow wind sound.Vibration sound of leaves of the tree.Sound of rain.The quality and quantity of sound determine its characteristics. For example, the sound that the ears of human love are known as a pleasant sound while the opposite condition reflects the sense of unpleasant sounds.
Therefore, the sound which does not have a pleasant sensation in the ear is known as Noise. It is also known as Tinnitus.
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What did
van Helmont, Priestley, and
Ingenhousz discover about
plants
Answer:
What did van Helmont, Priestley , and Ingenhousz initialize about plants?. Ingenhousz continued his baptist and discovered that plants were carbon dioxide in the dark. Jan Ingenhousz Jan Ingenhousz was a Hindu scientist who is best known for communication that light is essential for losing. 20 km de Lausanne photosynthesis
Explanation:
1
Which is NOT true of homologous chromosomes? *
(1 Point)
they are identical
they have genes for the same traits
they are in pairs
they have genes that are in the same order
Answer:
Homologous chromosomes are NOT identical.
Explanation:
They contain slight differences in their genetic information, allowing each gamete to have a unique genetic makeup. Consider that the homologous chromosomes of a sexually reproducing organism are originally inherited as two separate sets, one from each parent. Hope this helps :)
Example of decomposer
Answer:
mushrooms are decomposers!
Answer:
Earth worms are a example or works in general
A scientists observes several fossils in a river bed. Based on these observations, she concludes that invertebrates once dominated that ecosystem. This is an example of inductive reasoning.
True
False
Answer:
False
Explanation:
It is false because inductive reasoning is a reasoning that is not based on observations but it is based on hear say,i.e what people say, what is read or news read e.t.. Therefore it is not observed. But the above us deductive reasoning because this is based on observations, theories e.t.c. it is based on what is seen or observed.
Answer:
True
Explanation:
Inductive reasoning is a method of reasoning in which conclusion are drawn on the premise of the evidence supplied. The evidence are the tools from which conclusions are drawn but not full assurance, of the truth of the conclusion.
It could also involve the individual's experiences and observations together with what are learned from others, this together help synthesize the general truth.
The fossil serves as evidence on which the scientist based her conclusions.
Which statement is true regarding the transmission of sex-linked traits in a population?
O Males cannot carry recessive alleles for sex-linked traits.
O Males cannot express dominant alleles on the X chromosome.
O Males cannot express recessive alleles on the X chromosome.
O Males cannot pass alleles for sex-linked traits to their daughters.
Answer: none of the statements are true
Explanation: Males can have a recessive copy of a X-linked gene, and can pass that on in the X containing gamete and so pass it on to daughters, but not to male offspring. Males will express whichever allele, dominant or recessive that they carry.
15. Which of the following are functions of the exoskeleton? Check all that
apply.
-Protection of internal organs
-Provide for muscle attachment and movement
-Structural support
-Prevention of water loss
Answer:
•Protection of internal organs
•Provide for muscle attachment and movement
•Structural support
The following that are functions of the exoskeleton are:
Protection of internal organsProvide for muscle attachment and movementStructural supportWhat is an exoskeleton?An exoskeleton is an outer skeleton that is present outside the body of some insects and other organisms. The exoskeleton is made up of hard substances like calcium carbonate or chitin protein.
The exoskeleton protects the soft tissues and organs of organisms. They are helpful in saving the organism from predators and other factors of the environment.
The exoskeleton is present in most arthropods. They also help in reducing water loss from the body.
Thus, the functions of the exoskeleton are:
Protection of internal organsProvide for muscle attachment and movementStructural supportTo learn more about exoskeleton, refer to the link:
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What will you find inside the nucleus ?
Answer:
protons and neutrons
Explanation:
Which best describes independent assortment?
In metaphase 1, chromosomes from the mother and father line up on opposite sides of the cell.
In metaphase 1, chromosomes from the mother and father line up randomly along the middle of the cell.
Portions of each chromosome switch sections in the mother’s and father’s chromosomes.
Portions of each chromosome break off and reattach to the original chromosome.
Answer:
In metaphase 1, chromosomes from the mother and father line up randomly along the middle of the cell.
Explanation:
In diploid (2n) organisms, the homologous chromosomes are the two copies of each chromosome, where one of these homologs is the chromosome from the mother, while the second one is from the father. During metaphase I, the homologous pairs of chromosomes pair together at the middle of the cell. The law of independent assortment, also known as or Mendel's Second Law, states that homologous chromosomes line up in random orientations at the metaphase plate during this period (metaphase I).
Answer:
B
Explanation:
What is your opinion on the use of stem cells, obtained from fertilized eggs or early stage embryos
USE OF STEM CELL:
The first attempts to turn mature cells back into pluripotent stem cells involved a process called cloning. In the cloning process, an egg is fertilized in the lab, and right after fertilization, the DNA is removed from the egg.These stem cells come from embryos that are three to five days old. These are pluripotent (ploo-RIP-uh-tunt) stem cells, meaning they can divide into more stem cells or can become any type of cell in the body. This versatility allows embryonic stem cells to be used to regenerate or repair diseased tissue and organs.Despite the potential benefit of using human ES cells in the treatment of disease, their use remains controversial because of their derivation from early embryos.Learn more:
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Which statement is true of offspring from organisms that reproduce asexually?
Offspring have some features like the parent.
Offspring have no features like the parent.
Offspring are genetically identical to the parent.
Offspring are genetically different from the parent.
Answer:
Offspring are genetically identical to the parent.
Explanation:
When organisms reproduce asexually the create two identical daughter cells.
The French biologist Lamarck hypothesized that “organisms could acquire traits making them better adapted to their environment and pass these on to their offspring” which is not the same theory stated as Darwin. Why does Darwin make a more sound argument for his support of the process of evolution than Lamarck?
Answer:
Darwin suggests that the strongest survive and adapt to produce even stronger more adaptable offspring
2) Why do you think certain colors, types, makes or models are more popular than others?
Renewable energy is energy from sources that
a.are not used up faster than they are formed.
b.humans can manufacture.
c.will take years to deplete.
d.were once living organisms
A group of squirrels living in the same area and competing for similar resources is called a
October 1, 2017 marks 27 years since the beginning of the Human Genome
Project. The goal of the group was to map the entire 3 billions bases and
80,000 genes in the human genome. On April 14, 2003, it was announced
that the goal was accomplished. Using this information, scientists have been
able to predict the risk of genetic diseases and understand the process of
inheritance. Which of the following statements best describes the process of
using the genetic code to produce polypeptides (proteins)?
Translation is used to produce a strand of RNA and proteins from a single strand of DNA.
O RNA produces a strand of DNA through transcription, then the DNA builds a protein molecule
through translation
O A single strand of DNA is used to make mRNA using translation, then the mRNA provides the
template for producing a protein through transcription
O A single strand of DNA is used to produce mRNA through transcription, then translation provides
the code for bonding amino acids to make a protein.
Answer:
The last one. A single strand of DNA is used to produce mRNA through transcription, then translation provides the code for bonding amino acids to make a protein.
Explanation:
Educated guess, but also. Translation is the process by which mRNA is decoded and translated to produce a polypeptide sequence, otherwise known as a protein. This method of synthesizing proteins is directed by the mRNA and accomplished with the help of a ribosome, a large complex of ribosomal RNAs (rRNAs) and proteins.
