During its life cycle, fern plant goes through different phases in which it changes from reproducing asexually to reproducing sexually. Which statement best describes the difference?
A.The sexual phase can produce variations within the species
B.The sexual phase produces offspring that look identical
C.The asexual phase allows the plant to better tolerate harsh conditions
D.The asexual phase provides better variation of plants
Answer:
A.) The sexual phase can produce variations within the species
Explanation:
Sexual reproduction allows for the mixing of genes which creates variation. Since asexual reproduction just involves one cell, the daughter cells will be identical to the parent. Thus, no variation is created.
The fern's life cycle has been constituted of asexual and sexual phases that include sporophyte, and gametophyte. The sexual phase of the fern allows variation in the species. Thus, option A is correct.
What is an alternation of generations?Alternation of generations is the type of life cycle that includes both the asexual and sexual phases. They differ in morphology and genetics which results in the formation of varied offspring. It consists of two distinct phases that differ chromosomally.
The first phase includes sporophyte that produces spores that are in the asexual mode, whereas the second phase includes gametophytes that produce gametes that are in the sexual mode of reproduction. The gametophytes are the haploid plants and sporophytes are the diploid plants.
The sexual phase or the gametophytes allows the species to have variations as they involve the recombination and crossing over of the chromosomes that lack in the asexual mode of reproduction.
Therefore, option A. sexual reproduction allows variations.
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Please use the picture below to help you answer questions
What Type of cell is this??
What Type of cell is this??
Answer:
That's a plant cell, animal cells have no cell walls
Which of the following does NOT describe prokaryote chromosome organization?
diploid
found in the nucleoid
circular
tightly coiled
Answer:
diploid
Explanation:
diploid sorry if I'm wrong
MASTERY CONNECT MITOSIS
The answer is C i'm pretty sure
The diagram below shows how a chemical message produced by one cell is received by other cells
If these chemical messages are destroyed, the target cells will
Answer:
not respond with appropriate actions
Explanation:
produce their own chemical messages
not respond with appropriate actions
develop different receptors
no longer be produced in the organism
b is correct
answer from a quiz
which accurateely completes the statement? conduction involves the transfer of electric charge or _______ due to the movement of particles O thermal energy O light waves O protons O neutrons
Consider the image shown hete. What form of cell transport is shown?
A) Osmosis
B) Diffusion
C) Facilitated Diffusion
D) Endocytosis
Answer:
fascillated diffusion
Explanation:
it so utilised by molecules that are unable to freely cross the phospholipid bilayer.
What traits is controlled by multiple alleles in humans?
Microcystis aeruginosis is a freshwater photosynthetic cyanobacterium. When temperatures increase and nutrients are readily available in its pond habitat, M. aeruginosis undergoes rapid cell division and forms an extremely large, visible mass of cells called an algal bloom. M. aeruginosis has a short life span and is decomposed by aerobic bacteria and fungi. Identify the metabolic pathway and the organism that is primarily responsible for the change in oxygen level in the pond between times I and II AND between times III and IV.
Complete question:
You will find the figure with cyanobacteria, decomposers, and oxygen concentration curves in the attached files.
Answer:
- between times I - II: cyanobacteria produce oxygen through the procees of photosynthesis.
- between times II - III and III - IV: decomposers consume oxygen through the process of respiration.
Explanation:
Cyanobacteria, also known as green-blue algae, inhabits the euphotic stratum, producing oxygen through the process of photosynthesis. Probably they produce among 20 - 30% of the global photosynthetic activity. When they die, they sink to deeper water strata.
At the time I, the cyanobacteria population experiences a fast growth, which can be seen through the positive sharp increase of the curve slope. The curve reaches a maximum point just before time II, where it begins to decrease. Cyanobacteria reproduce, and the population grows in size. The more cells there are, the more photosynthetic activity, and the higher amount of oxygen is produced. Following cyanobacteria growth, there is an increase in oxygen concentration, which is reflected by the sharp increase in the curve slope. Both curves are very similar, but they are separated on time, meaning that first cyanobacteria need to reproduce and photosynthesize to posteriorly observe a proportional increase in oxygen concentrations.
Just before time II, the cyanobacteria population stops growing, and at time II begins a sharp decrease in size, reflected in the curve slope. Living cells still produce oxygen, but as there are fewer cells, oxygen concentration also decreases. Cyanobacteria are decomposed by aerobic bacteria and fungi. These last organisms consume oxygen through the process of respiration. As cyanobacteria die and are decomposed, aerobic cells can reproduce at higher rates, increasing their population size. This also can be seen reflected in the decomposers curve, which is stable until time II where it shows a sharp positive increase in its slope. As decomposers' population increases, they consume more oxygen, which concentration decreases inversely proportional to the decomposers' increase. This can be seen in the curves: from time II to time III, the aerobic organisms curve increases and the oxygen curve decreases, so as the cyanobacteria curve.
Just before time III cyanobacteria population stabilizes and during time IV keeps equal. Oxygen concentration keeps following, from time II to IV. When cyanobacteria stabilize, before time III, decomposers population starts to decrease, but they still consume oxygen.
name one fossil anima
Answer:
Mold Fossils
Explanation:
Grandma Hippity Hop is worried about the ice that will be forming on her sidewalk this winter. She doesn't have money to waste on sidewalk salt that is ineffective, so Brenda decides to do some testing for her.
Indepedent Variable - ______________________________________________________
Dependent Variable - _______________________________________________________
Controlled Variables: (There are at least 5. Please list 2) __________________________________________________________________________________
__________________________________________________________________________________
Answer:
Independent variable- SIDEWALK SALT
Dependent variable- ICE FORMATION
Controlled variables- same size of ice, same sidewalk
Explanation:
Based on the information given in this question, Brenda is helping Grandma Hippity Hop test the effect of sidewalk salt on the formation of ice on her sidewalk.
In an experiment, the independent variable is the variable that is changed or manipulated by the experimenter. In this case, the SIDEWALK SALT is the independent variable because it is the one being changed i.e used or not used.
Dependent variable is the variable that responds to the changes made to the independent variable. It is the variable that is measured or recorded in an experiment. In this case, the ICE is the dependent variable because its formation is dependent on the SALT (independent variable).
Controlled variable or constants are variables of an experiment that are kept unchanged throughout the experiment. In this case, the SAME SIDEWALK AND SIZE OF ICE are used, hence, they are the controlled variables.
Describe how hydrogen bonds form between separate water molecules
According to the USDA, a "consists of a community of individuals who pledge support to a farm operation so that the farmland becomes,
either legally or spiritually, the community's farm, with the growers and consumers providing mutual support and sharing the risks and benefits
of food production."
-sustainable operation
-farmers' market
-farmers' cooperative
-CSA
Answer:
The correct answer is CSA.
Explanation:
Community Supported Agriculture (CSA) is an alternative model for the distribution of agricultural products directly from the farmer to the consumer, it consists of a group of people who form a cooperative to grow and consume food. Through this socio-economic model, consumers lend their support to producers, in exchange for a direct and regular delivery of biological products, that is, producers and consumers support each other and share the benefits and risks of food production.
The agricultural research facility during a research accidentally changed the DNA sequence of a wheat plant from GCCATGTT to GCGTACTT and this mutation resulted in a stronger plant variety. What kind of mutation did the plant undergo?
A. Inversion
B. Substitution
C. Insertion
Answer:
The answer is A. Inversion
Explanation:
the codes is just changing
hope this helps
which statement is an example of a feedback mechanism in humans
1.) increase in the level of blood sugar results in the pancreas increasing the amount of insulin it secretes
2.) increase exposure to pathogenic bacteria result in an increase in the number of red blood cells produced
3.) an increase in exercise results in a decrease in the rate of respiration
4.) increased muscle activity results in a decrease in heart rate
Answer:
1.
Explanation:
Controlling the level of sugar in the blood is an example of a feedback mechanism
The feedback mechanism man is a physiological regulation system that is found in a living body that works to return the body to the normal or earlier internal state. It is commonly called the homeostasis mechanism.
This feedback loop can be seen in any day-to-day function such as a rise in blood pressure levels, which results in the increase of insulin secretion in the body. An increase in physical activity leads to an increase in respiratory rate and the homeostatic mechanism will gradually lead to the body to the previous state.Thus the option 1 is correct.
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What is found in the nucleus of animal cells?
Answer:
What is found in the nucleus of animal cells
Explanation:
DNA
Answer:
Hope that was helpful
Explanation:
Animal cells contain three main regions: plasma membrane, nucleus, and cytoplasm. The nucleus is a cell's central organelle, which contains the cell's DNA.
The structure of a nucleus encompasses the nuclear membrane, nucleoplasm, chromosomes, and nucleolus. The nuclear membrane is a double-layered structure that encloses the contents of the nucleus.
Mendel came up with his Law of Independent Assortment through his investigations studying ?
whether or not the inheritance of one trait affected the other.
simple monohybrid traits such as plant height.
the passing down of dominant seed shape to offspring.
how self-pollination affects the second filial generation.
Answer:
A. whether or not the inheritance of one trait affected the other.
Explanation:
I just had this question on my exam :)
Consider a cross between two Brassic rap parent plants known to be heterozygos tall. Using a punnett square to solve this cross and break down the expected genotypc and phenotyic results.
Draw a punet square here
Genotypic results:
Homzygous Dominant:
Heterzygous:
Homzygous Recessive:
Phenotypc results:
Tall:
Answer:
Genotypic results: 1 (TT):2 (Tt) :1 (tt)
Homzygous Dominant: 1/4
Heterozygous: 1/2
Homzygous Recessive: 1/4
Phenotypc results: 3 tall: 1 short
Tall: 3/4
Short: 1/4
Explanation:
This question involves a gene coding for height. The alelle for tallness (T) is dominant over the allele for shortness (t). According to this question, a cross between two Brassic rap parent plants known to be heterozygos tall (Tt) is performed.
Each parent will produce gametes T and t. Using these gametes in a punnet square (see attached image), the following offsprings will be produced:
TT (1), Tt (2), and tt (1)
Based on this result, the following results are obtained:
Genotypic results: 1 (TT):2 (Tt) :1 (tt)
Homzygous Dominant: 1/4
Heterozygous: 1/2
Homzygous Recessive: 1/4
Phenotypc results: 3 tall: 1 short
Tall: 3/4
Short: 1/4
A classroom has 10 rows and 12 columns of chairs.on a rainy day only 35 were occupied.how many chairs were empty
Answer:85? I think sorry if I am wrong but from i understood I think it is right.
Select the correct location on the image.
Identify the image that depicts an abiotic factor.
The images are:
Trees
A tiger
Some bird
Sun rays
Beetle
Answer:
sun rays
Explanation:
biotic factors are ones that are alive which are the tree, tiger, birds, and beetle. abiotic is the ones that are not alive which would be sun rays, air or water. hope this helps
In the image, the sun's rays are the abiotic factor. So the correct option is D.
What are abiotic factors?
All the non-living components or factors of an ecosystem are referred to as the Abiotic factors of that ecosystem. They are the chemical factors or the physical factors.
These are present either in the lithosphere, atmosphere, or hydrosphere. Examples of abiotic factors include sunlight, minerals, air, soil precipitation, and everything else that supports life but is not living.
These factors support life in the ecosystem. They help in the survival of the species and their reproduction in the ecosystem.
For example, without the required amount of sunlight, autotrophic photosynthetic organisms would not be able to perform photosynthesis. Thus it will result in their death. Since they are primary producers, the organisms dependent on them, called primary consumers will also die.
This effect will continue to cascade up the food chain and will eventually affect every organism.
Therefore the correct option is D.
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Which characteristic mentioned in the key do the spider and insect share?
A. Has wings
B. Has antennae
C. Has no backbone
D. Has no legs
Answer:
Has no backbone
Explanation:
Ap3x
Mecanismo de proteccion que posee el cuerpo que ocurre de forma pasiva a traves de la nariz?
Answer:
membrana mucosa que recubre las fosas nasales
Explanation:
Las fosas nasales se encuentran recubiertas por una membrana mucosa y unos pelos diminutos conocidos como cilios que ayudan a filtrar el aire que llega a los pulmones. Esta membrana posee dos tipos de mucosas: mucosa respiratoria y mucosa olfativa. La mucosa respiratoria de la cavidad nasal posee células caliciformes que secretan una sustancia llamada moco la cual tiene la finalidad de humedecer y calentar como así también de atrapar microorganismos patógenos/residuos del aire los cuales son finalmente removidos por los cilios que "barren" estas sustancias hacia la faringe. Por otra parte, la mucosa olfativa de la cavidad nasal se caracteriza por poseer células nerviosas olfativas las cuales forman parte del sentido del olfato.
I need help with this one! Please!
Answer:
B) The nutrients are picked up and transported around the body by blood from the circulatory system.
Explanation:
Food goes through your digestive system. Nutrients are taken out of your food in your intestines. Your intestinal walls absorb the nutrients and put them into your blood, which is put into your bloodstream in the natural cycle of blood going through your veins and arteries. Along the way, nutrients are brought to cells everywhere in your body before going through your heart and then kidneys.
Please Mark Brainliest!
PLEASE HELP ASAP (: question in photo
Answer:
B. early loss
Explanation:
Because the curve of C happens early in the process, it is best to assume that you have early loss survivorship as a result. Curve A would be a late loss survivorship while Curve B would be a constant loss survivorship.
Why are crops in the artic grow larger than normal during the summer months?
Answer:
Explanation:
Crops in the arctic grow larger than normal during the summer months because the snow and ice from winter starts to melt, giving the plants a lot more water.
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Answer:
(1 point) Crops in the arctic grow larger than normal during the summer months because the snow and ice from winter starts to melt, giving the plants a lot more water.
Basal metabolic rate is the body's resting rate of a drive reduction. b insulin secretion. c homeostasis. d energy expenditure. e motivation.
Answer:
d energy expenditure.
Explanation:
Basal metabolic rate is the body's resting rate of energy expenditure.
Simply stated, Basal metabolic rate describes the amount of calories that is required to keep the human body to function properly and perfectly at rest.
Calorie can be defined as a standard unit used for the measurement of the amount of energy present in foods and drinks.
Basal metabolic rate is the body's resting rate of a drive reduction is energy expenditure.
The BMR not entirely settled by roundabout calorimetry by estimating Q O 2 , the pace of oxygen utilization. In contrast to the BMR, the determination of the resting energy expenditure (REE) does not require a 12-hour fast.
Both BMR and RMR show the quantity of calories an individual consumes very still. If you're trying to control your weight, this information may be helpful. Calculating a person's BMR or RMR can help them determine how many calories they should cut out each day if they are trying to lose weight.
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• Al medir 4.7 m como la longitud de una habitación que mide realmente 4.67 m.
Answer:
Completando.
Explicación:
Al medir 4,7 m como la longitud de una habitación que en realidad es 4,67 m debido al redondeo del valor de 4,67. El redondeo se refiere a un número que se simplifica al mantener su valor intacto pero más cerca del siguiente número. Se hace tanto para números enteros como para decimales. Si el segundo dígito a la derecha del decimal es mayor que 5, entonces se le da un número al primer dígito presente a la derecha del decimal, por lo que en este ejemplo, el segundo dígito a la derecha del decimal es 7, que es mayor que 5, por lo que se agrega uno. a 6, que está presente a la derecha del decimal, lo que lo convierte en 7.
Explain the difference of Particle theory and wave theory in your own words.
pleaseeeee helpppp
Within a plant, photosynthesis is critical. It provides cells with the glucose they need for
energy. Photosynthesis is important for another reason, too. It's part of the flow of carbon
through organisms and the environment. This cycle, known as the carbon cycle, is essential
for life on Earth. It includes several processes that are occurring all the time. When plants
photosynthesize, carbon is removed from the atmosphere as carbon dioxide. When animals
and plants use cellular respiration, carbon is released into the atmosphere as carbon
dioxide. Organisms that die and are buried for millions of years turn into fossil fuels, which
are made of carbon. When humans burn those fossil fuels, carbon is released into the
atmosphere as carbon dioxide. Without enough carbon dioxide in the atmosphere, the
planet would be too cold. But too much carbon dioxide contributes to the warming of the
planet that could make it too hot to survive.
Based on the passage, what is one reason that the carbon cycle important?
A It adds carbon into the atmosphere whenever the level begins to drop too low.
B
It helps maintain a level of carbon in the atmosphere that is neither too hot nor
too cold.
с
It removes carbon from the atmosphere whenever the level begins to become
too high.
D
It releases carbon into space, preventing it from building up in Earth's
atmosphere.
Answer:
B
Explanation:
just did that on flocabulary
The density of 10 g of silver is 10.5 g/cm3. What would be the density of 5 g of silver?
A. 1.05g/cm3
B. 5.25g/cm3
C.10.5g/cm3
D.21.0g/cm3
Answer:
1.01 x 10'4 G :)
Explanation:
We are given the density and volume, both of which have good units so all we have to do is rearrange the equation to solve for the mass..
