Answer:
polygenic trait
Explanation:
polygenic trait
A scanning electron microscope is a type of light microscopes that has more than one lens
True
False
Answer:
true
Explanation:
the condenser lens is the size of the electron beam and the main objective lens is to focus the beam on the sample
so that scanning electron microscope have two projector lens
sorry if its not correct
What hormones stimulate the cycle of egg or sperm production?
Answer: The main reproductive hormones are estrogen and testosterone. Once a girl enters puberty, estrogen matures the eggs in the ovaries. These are then released at regular intervals during the menstrual cycle. Testosterone stimulates the production of sperm in men.
Explanation:
Which list shows the steps by which surface water can become groundwater?
A. Zone of saturation → zone of aeration → precipitation
B. Precipitation → zone of aeration → zone of saturation
C. Zone of aeration → zone of saturation → precipitation
D. Zone of saturation → precipitation → zone of aeration
The steps by which surface water can become groundwater
B. Precipitation → zone of aeration → zone of saturation.
What is Groundwater?
Groundwater is the reservoir of water this water accumulates in the ground surface or subsurface of the earth's crust through tiny pores and fractures in the rocks.
The source of water are streams of rivers, oceans, lakes and large depositing is because of water from the rain and melting of the snow. It is a source of freshwater in nature.
Thus, option "B" is correct.
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The curly toe phenotype is controlled by 4 genes that act in an additive manner. The environment does not have an effect on this trait. A dominant allele (represented by the capital letters) has 6 units of risk. A recessive allele (represented by the lower case letters) has 2 units of risk. Individuals with more than 35 units of risk have curly toes. Individuals with 35 or fewer risk units have straight toes.
What is the highest number of risk units an individual can have with this model?
Give your answer as a whole number, not in words.
What is the phenotype of an individual of genotype AaBbCCDd? .
Curly Toes Straight Toes notype AAbbCcDd is married to an individual of genotype AaBbCCDd.
Is it possible for them to have a child with curly toes?
Answer:
What is the highest number of risk units an individual can have with this model? 48 units of riskWhat is the phenotype of an individual of genotype AaBbCCDd? The individual has curly toesIs it possible for them to have a child with curly toes?Yes, the couple can have children with curly toes.
Explanation:
Available data:
The curly toe phenotype is controlled by 4 diallelic additive genesGenes A, B, C, D A dominant allele has 6 units of riskA recessive allele has 2 units of riskIndividuals with more than 35 units of risk have curly toesIndividuals with 35 or fewer risk units have straight toesThe term quantitative heritability refers to the transmission of a phenotypic trait in which expression depends on the additive effect of a series of genes.
Polygenic heritability occurs when a trait results from the interaction of more than one gene. And these genes can also have more than two alleles. The action of many genes and alleles can cause many different combinations that are the reason for genotypic graduation.
Quantitative traits are those that can be measure, such as longitude, weight, eggs laid per female, among others. These characters do not group individuals by any precise and clear categories. Instead, they group individuals in many different categories that depend on how the genes were intercrossed and distributed during meiosis. The result depends on the magnitude in which each allele contributes to the final phenotype and genotype. When they interact, they create a gradation in phenotypes, according to the level of contribution.
According to this information, and knowing how each allele contributes to the risk, we can say that the minimum units of risk are 16, determined by the recessive genotype aabbccdd. Each recessive allele contributes with 2 units of risk, so (aa=4units + bb=4 units + cc=4 units + dd=4 units) = 16 units.
Each time a dominant allele is present in the genotype, it adds 6 units to the total risk.
What is the highest number of risk units an individual can have with this model?
48 units of risk, which corresponds to the genotype AABBCCDD. Each dominant allele contributes 6 units to the risk. There are 8 dominant alleles, so, 8x6=48 units.
What is the phenotype of an individual of genotype AaBbCCDd?
The individual has curly toes because it has a risk of 36 units, which is superior to the limit of 35 units. Dominant alleles A, B, C, C, D contribute with 30 units of risk (6x5), and recessive alleles a, b, d contribute 6 units of risk (3x2).
Cross:
Parentals) AAbbCcDd x AaBbCCDd
Gametes) AbCD, AbcD, AbCd, Abcd
ABCD, ABCd, AbCD, AbCd, aBCD, aBCd, abCD, abCd
Punnett square) AbCD AbcD AbCd Abcd
ABCD AABbCCDD AABbCcDD AABbCCDd AABbCcDd
ABCd AABbCCDd AABbCcDd AABbCCdd AABbCcdd
AbCD AAbbCCDD AAbbCcDD AAbbCCDd AAbbCcDd
AbCd AAbbCCDd AAbbCcDd AAbbCCdd AAbbCcdd
aBCD AaBbCCDD AaBbCcDD AaBbCCDd AaBbCcDd
aBCd AaBbCCDd AaBbCcDd AaBbCCdd AaBbCcdd
abCD AabbCCDD AabbCcDD AabbCCDd AabbCcDd
abCd AabbCCDd AabbCcDd AabbCCdd AabbCcdd
F1) 16 /32 = 1/2 individuals in the progeny are expected to have curly toes
16 /32 = 1/2 individuals are expected to have straight toes
Is it possible for them to have a child with curly toes?
Yes, the couple can have children with curly toes.
To have curly toes, individuals must have more than 35 units of risk.
To have more than 35 units, individuals´ genotypes must carry at least 5 dominant alleles (which equal 30 units).
In a diagram of a food chain where does a producer such as a tree get the beefy it needs to survive?
Answer:
from the sun
Explanation:
producers get light energy from the sun
Answer: a producer such as a tree would get its energy/food from the process of photosynthesis.
Explanation:
"Whenever two objects come into contact, there is always a transfer of material demonstrates which
principle?
a. Daubert principle
b. Frey principle
Locard's principle
d. Holmes principle
c.
Answer: It is the Locard's principle.
:)
Which of the following functions in multicellular organisms is similar to the function of DNA in unicellular organisms?
A.
Inheritance of traits
B.
Cell respiration
C.
Cell digestion
D.
Protein synthesis
A. Inheritance of traits
Both single and multi-celled organisms embrace a functional unit of life, known as “Cells”. Both of them consist of plasma membrane and cytoplasm. They carry similar features by containing DNA and ribosomes for the gene expression. All known forms of life store their genetic information using DNA, and with a few exceptions the code is universal.Both have basic unit of life (cell). Which means they both ingest food ,respire, and get rid of waste.Multicellular organisms are bigger than unicellular organisms. Unicellular has a single cell but multicellular have more than one cell.Thus, option A is correct.
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Give three examples of what happens with unbalanced forces? I give Brainly
Phenylketonuria causes a severe cognitive disability due to the inability to metabolize phenylalanine. It is an autosomal recessive disorder. About one in 12,000 newborns in Massachusetts are afflicted with the disease, skewed higher than the general US population due to more Irish-Americans. Assuming the gene is in Hardy-Weinberg equilibrium, the frequency of the carriers (heterozygotes) in Massachusetts would be calculated to be...
Answer:
The frequency of the carriers (heterozygotes) in Massachusetts is 0.018
Explanation:
Due to technical problems, you will find the complete explanation in the attached files
You burn a log on a fire. You use the fire to warm yourself and to light up the
room to read a book. Which energy transformation is taking place?
A. Chemical energy is transformed to nuclear energy and thermal
energy
B. Chemical energy is transformed to light energy and thermal
energy
C. Thermal energy is transformed to light energy and chemical
energy
D. Nuclear energy is transformed to potential energy and thermal
energy.
Answer:
b) is the the answer
Explanation:
hope it helps
The disk-shaped region around the sun that contains the orbit of each planet is
called the
circumpolar curve
ecliptic plane
coordinate grid
celestial sphere
Answer:
The answer is ecliptic plane
Explanation:
I got it right on the test
Katie is camping with her family. She forgot her gloves. Now her hands are cold.
How can Katie keep her hands warm?
OA
Katie can stick her hands in cold water.
ОВ.
Katie can hold a flashlight in her hands.
OC.
Katie can rub her hands together.
OD. Katie cannot make her hands warm.
Answer:
Katie can rub her hands together
Explanation:
The friction of her hands rubbing together will create heat.
Order the steps in the process of fertilization.
Answer:
The stages of fertilization can be divided into four processes:
1) sperm preparation,
2) sperm-egg recognition and binding,
3) sperm-egg fusion and
4) fusion of sperm and egg pronuclei and activation of the zygote.
Individuals in a population of purple people earters are polymorphic at a single locus that leads to variation in purple people eater pup viability. 45% of the pups with genotype PP are viable, 54% of pups with genotype Pp are viable, but only 4% of pups with genotype pp are viable. What model of natural selection best fits these data
Answer:
The correct answer is - overdominance.
Explanation:
In the given question, genotype Pp is a heterozygote condition that has a 54% survival rate or fitness thus these individual people get more chance of mating and increase in number as compared to the other two conditions of PP or pp traits where PP has 45% survivability, less than heterozygous condition and more than pp that has only 4% rate.
It results in a normalizing selection model of natural selection as a moderate trait, that is heterozygote, is selected. Thus, the selection of overdominance which means heterozygote condition produces a better phenotype than PP or pp parents is heterosis.
Why is global warning considered a controversial issue?
answer: The global warming controversy concerns the public debate over whether global warming is occurring, how much has occurred in modern times, what has caused it, what its effects will be, whether any action can or should be taken to curb it, and if so what that action should be. In the scientific literature, there is a strong consensus that global surface temperatures have increased in recent decades and that the trend is caused by human-induced emissions of greenhouse gases.[1][2][3][4][5][6] No scientific body of national or international standing disagrees with this view,[7] though a few organizations with members in extractive industries hold non-committal positions,[8] and some have attempted to convince the public that climate change is not happening, or if the climate is changing it is not because of human influence,[9] attempting to sow doubt in the scientific consensus.
Which sequence list matter from smallest to largest
A:molecule-atom-tissue-organ system
B: atom-molecule-tissue-organ
C:atom-molecule-organ system-tissue
D:atom-organ-molecule-organ system
Answer:
B
Explanation:
Atoms are smaller than molecules, then the tissue comes before the organ
which layer is the youngest in this image?
Please help I have a time limit
A specific location in America has closed down several fossil fuel units and set up
geothermal plants. In your own words, explain how this would affect the
environment of the location.
Answer:
it would have a big affect because The environment around the area in Africa will be mined, drilled, or condemned. The area will be used as a resource reserve. The land around will either be damaged or conserved for further mining or sample taking.Waste water may be discharged at temperatures high enough so that utilization of the waste heat becomes both practical and imperative.
Explanation:
-
Plssss help with this question. i need an answer ASAP.
Nitrogen fixation for plants occurs in what organisms?
Answer:
Two kinds of nitrogen-fixing microorganisms are recognized: free-living nonsymbiotic bacteria, including the cyanobacteria or blue-green algae Anabaena and Nostoc and genera such as Azotobacter, Beijerinckia, and Clostridium; and mutualistic symbiotic bacteria such as Rhizobium, associated with leguminous plants,.
Explanation:
Two kinds of nitrogen-fixing microorganisms are recognized: free-living (nonsymbiotic) bacteria, including the cyanobacteria (or blue-green algae) Anabaena and Nostoc and genera such as Azotobacter, Beijerinckia, and Clostridium; and mutualistic (symbiotic) bacteria such as Rhizobium, associated with leguminous plants, ...
What farming practices have depleted grasslands in North America?
Answer:
Cultivation of crops and tillage practices.
Explanation:
Farming of crops and tillage practices on the grasslands depleted grassland that are present across North America because the lands are converted and used for the production of food crops in order to fulfill the feed the existing population. More and more land is converted from grassland to the cultivation of crops that leads to lower area for the grazing of animals which results in decrease population of animals such as sheep, goat and cow etc which depends n these grazing regions for food.
Describe human use of landfills and the importance of landfill design
Human use of landfills: Landfills can safely handle non-hazardous municipal solid waste, constriction and demolition waste, land clearing debris, some industrial wastes, coal ash, sewage sludge, treated medical wastes, solidified liquid wastes and tenorm (Technologically Enhanced Naturally Occurring Radioactive Material—fracking waste)
The importance of landfill design: Modern landfills are well-engineered and managed facilities for the disposal of solid waste. Landfills are located, designed, operated and monitored to ensure compliance with federal regulations. They are also designed to protect the environment from contaminants, which may be present in the waste stream.
Please hurry I need the right answer and I will give brainliest for the right answer no alien talk or file
Answer:
grasshopper
The organisms that eat the producers are the primary consumers. ... The primary consumers are herbivores (vegetarians
state three features of myriapods that can be used to distinguish them from other arthropods
Answer:
Mandibles (lower jaw) and maxillae (upper jaw)
Two body sections (head and trunk)
One pair of antennae on the head
Explanation:
hope this helps! have a great day / night
Although Myriapods share many characteristics with other arthropods, they distinguish for having an elongated and multisegmented body, one or two pairs of legs per segment, two antennae, and rolling-up ability
----------------------------------------
As the name refers to, Myriapods have many feet. They characterize because their bodies are very elongated and divided into multiple segments. From each of the rings, emerge one or two pairs of legs.
As every arthropod, their bodies are segmented and covered by a cuticle for protection and to avoid dehydration.
Their heads carry two antennae, ocellus, and a mouth with prominent buccal appendixes. Some of them might be poisonous.
They can be slow when moving, but they are well-adapted to move through leaves and other organic material. But because they move slowly, they need a protection strategy to avoid predation. This strategy is rolling. They can roll up, and remaining like a boll, until the predator leaves.
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Answer:
A gene mutation
Explanation:
DNA nucleotide sequence is unique
Which scenario accurately describes an example of artificial selection? (1 point)
A woman who worked hard to become a superior athlete has children who also turn out to be
dedicated athletes
A seal living in a coastal region where food is abundant thrives and reproduces because of the
abundance of food.
A scientist modifies the genes of a tomato plant to make it more resistant to disease.
A farmer intentionally breeds oranges to be more resistant to aphids.
Answer:
Connections Academy Quick Check
Explanation:
1. genetic drift
2. genetic modification
3. the fish experienced an evolutionary change because of the genetic drift
4. a farmer intentionally breeds oranges to be more resistant to aphids
5. evolution
The scenario that accurately describes an example of artificial selection is A scientist modifies the genes of tomato plants to make them more resistant to disease. So, the correct option is C.
What do you mean by Artificial selection?Artificial selection may be defined as the identification by humans of desirable traits in animals and plants and increases its superiority in future generations.
In this question, a scientist modifies the genes of a tomato plant in order to enhance its superiority over diseases and overall impacts its productivity in a positive way.
Therefore, the scenario that accurately describes an example of artificial selection is A scientist modifies the genes of tomato plants to make them more resistant to disease.
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Sid is observing an unknown cell under a microscope. The presence of which structure would help him to determine if the cell was from a plant or from an animal?
O Nucleus
Cell wall
Ribosomes
O Cell membrane
cell wall
the main difference between animal cell and plant cell is in existing of cell wall on plant cell and existing of centriols in animal cell large vacules in plant cell ...
Cell wall is the structure determine that the cell is from the plant cell because cell wall is present in only in plant cell.
What is cell wall?The outer covering of a cell that is present adjacent to the cell membrane is known as cell wall. It is only present in plants, fungi, bacteria, algae, and some archaea but not present in animal cell.
So we can conclude that Cell wall is the structure determine that the cell is from the plant cell because cell wall is present in only in plant cell.
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Plants have structures which affect reproduction rates in plants.
A. True
B. False
Answer:
i think it is false
Explanation:
i could be wrong
two models of sells are shown below. Why would model b be better for moving nutrients in and out of the cell?
Answer:
The correct answer is - C. It has a larger ratio of surface area to volume.
Explanation:
In cell B, the ratio of surface area to volume is larger in comparison to cell A. The surface area to volume ratio can be understood as it is the size of surface area that the volume of a particular substance can move in or out of the cell, in a unit of time.
Thus the larger the ratio of surface area to volume faster the diffusion rate of nutrients will be as the surface area is a square measurement and volume is cubed so the surface area increases faster than volume.
Four stage in which abortion cannot be done.
Answer:
Fourth trimester.
Explanation:
Fourth trimester is the fourth stage in which abortion can not be done because the baby is big enough in size and comes out from the womb. The abortion in this stage can put the life of the mother in danger so that's why abortion is not allowed. Newborn babies are learning to adjust itself to life outside the womb where it was warm so we can say that fourth trimester is the stage in which abortion is risky and dangerous.
How does this affect the change?
Answer: B. It sped up evolutionary change by increasing genetic variation.
Explanation:
Evolution works when organisms with genes that are better suited to the environment pass on their genes to future generations.
Sexual reproduction sped up this process because it allowed for genetic variation as genes from the two mates would be passed on the next generation instead of one organism as had been the case with asexual production.
With genes from both mates mixing up and going into the next generation, more genetic variations were produced which allowed for the organisms to better adapt to the environment.