Which of the following structures are found only in embryos that shows the relationship of humans to other species?
Select one:
Lungs
Brains
Gills
Appendix
Answer:
pls read this paragraph
Explanation:
Vestigiality is the retention during the process of evolution of genetically determined structures or attributes that have lost some or all of the ancestral function in a given species.[1] Assessment of the vestigiality must generally rely on comparison with homologous features in related species. The emergence of vestigiality occurs by normal evolutionary processes, typically by loss of function of a feature that is no longer subject to positive selection pressures when it loses its value in a changing environment. The feature may be selected against more urgently when its function becomes definitively harmful, but if the lack of the feature provides no advantage, and its presence provides no disadvantage, the feature may not be phased out by natural selection and persist across species.

In humans the vermiform appendix is a vestigial structure; it has lost much of its ancestral function.
Examples of vestigial structures (also called degenerate, atrophied, or rudimentary organs) are the loss of functional wings in island-dwelling birds; the human appendix and vomeronasal organ; and the hindlimbs of the snake and whale.
Help 7 grade science
Answer:
rotifer
Explanation:
An omnivore feeds on both plants and animals. I'm this food web the rotifer is eaten by the copopod. The copepod feeds on golden algae (plant) and rotifer (animal), which makes it an omnivore. As such, the correct answer is rotifer because it is feed on by the omnivore, copepod.
orgain foods are natural and are believed to protect feom diseases and to be of higher quality. What is the most likely factor keeping organic foods from completely replacing conventional foods? a) greater cost b) health concerns c) environmental issues d) greater availability
Answer: A greater cost
Explanation: just took the test
What is true of all body cells except sex cells?
While each cell type in the body contains the same kinds of genes, they are organized on a different number of chromosomes depending on the cell type.
Each body cell contains the same number and kinds of chromosomes for that organism. In humans, the same 46 chromosomes are in every body cell.
Each body cell type carries a different number of chromosomes that code for that type of cell.
While each cell in the body contains the same number of chromosomes, each cell type has a different number of genes along those chromosomes.
Answer:
While each cell in the body contains the same number of chromosomes, each cell type has a different number of genes along those chromosomes.
What would make oppositely charged objects attract each other more?
increasing the positive charge of the positively charged object and increasing the negative charge of the
negatively charged object
decreasing the positive charge of the positively charged object and decreasing the negative charge of the
negatively charged object
increasing the distance between the positively charged object and the negatively charged object
maintaining the distance between the positively charged object and the negatively charged object
Answer:
A
Explanation:
Answer:
A, increasing the positive charge of the positively charged object and increasing the negative charge of the negatively charged object
Explanation:
EDGE 2021
Şermin yaşar gelirken ekmek al kitabı özet acilll
Answer:
Kitabın Yazarı:Şermin YaşarKitap Türü:Öykü/HikayeYayınevi:Doğan KitapçılıkYayınlandığı Yıl:2019 (19-10-2019)Sayfa Sayısı:196ISBN:9786050966534Kitap Puanı:8 / 10 | Yorum: 22
Explanation:
define what an intron and exon is
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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A scientist wants to determine whether a mutant phenotype is due to the loss of gene C or gene D, which are both deleted in a mutant fly with abnormal eyes. Mutant flies with that have a transgenic gene C have wild-type eyes, whereas mutant flies that have a transgenic gene D have abnormal eyes. What can be concluded from these results
Answer:
a transgenic copy of the gene C is sufficient to restore normal eye development
Explanation:
In genetics, there are diverse approaches to determining a gene's function. For example, it is possible to use a complementation test to determine loss-of-function recessive mutations when it is unknown if such mutations fall in the same or in different genes. Similarly to the generation of loss-of-function phenotypes, it is possible to insert a gene and thus produce a gain-of-function mutation that restores normal gene function (i.e., to restore the wild phenotype). Moreover, transgenic organisms refer to genetic engineering techniques by which any foreign or modified gene is inserted in the genome of an organism, which can also be used to study gene function. In this case, the restoration of the normal phenotype (wild-type eyes) is associated with the expression of the transgenic gene C, thereby evidencing that the gene C is required for normal eye development. In the last years, transgenic models have shed light on developmental pathways and on gene function.
Design an experiment to test the role of thyroxine in helping the body adjust to cold temperatures. Describe the overall investigation to be done, the variables to be changed, the variables to be kept constant, the subjects to be used, the control and experimental conditions to be used, the type of data collected, and how the data will be collected. Explain how these data can be used to justify the conclusion that thyroxine is involved in adjusting body temperature in response to cold. (9 points)
Answer:
- Hypothesis: thyroxine gene is responsive to low temperatures, thereby its transcript level is higher in cold climates
- Subjects of study: gene expression data collected from individuals from countries with different climates
- Experiment: to determine thyroxin gene expression level by Real-Time PCR (RT-PCR) in individuals living in cold climates (e.g., Iceland) versus individuals living in warmer climates (e.g., Puerto Rico)
- Independent variable: temperature
- Dependent variable: thyroxin transcript level
- N sample: 500 individuals of each population
- Control group: individuals living in the same climate conditions but from different countries. It can be done by collecting gene expression data from individuals living in another country. For example, both Fairbanks (Alaska) in the USA and Reykjavik in Iceland are at 64 degrees N latitude, and thereby these cities have similar climates
- Constant variable: all data collected from individuals of adult age (age range: 20-30 years)
Explanation:
The scientific method is a sequential process that consists of making hypotheses in order to explain observations from the real world, make predictions based on the working hypotheses, carrying out experiments based on those predictions, test the predictions and draw conclusions based on the results obtained. In an experiment, the independent variable isn't changed by the other variables, while the dependent variable is the variable being measured in the experiment. A constant variable does not change during the experiment. Moreover, a control group is a particular group to which comparisons are made during the experiment (the control group isn't exposed to the independent variable, and therefore any change in the experimental groups can be compared with the control). In this case, it is expected to measure thyroxine expression levels in 500 individuals from each country by RT-PCR (RT-PCR technique is used to measure the amount of mRNA of a target gene of interest). Subsequently, it is possible to determine if the differences in the thyroxin gene expression levels between populations (i.e., individuals living in Iceland vs individuals living in Puerto Rico) are statistically significant to confirm that thyroxin gene activity is increased in response to cold exposure. Finally, the control group can be used to determine if observed differences in gene expression are irrefutably correlated with cold conditions.
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
Plz help me well mark brainliest if correct!!...
Answer:
current event
Explanation:
if an event is happening right now it wouldnt be past or future it would be current
Alleles are represented by using letters. A dominant gene is
represented by what kinds of letters? Capital or small letters?
Answer:
Capital
- Refer to the basic theory in genetics.
What best describes the work of endocrinologist? specializing in the endocrine system performing lots of surgery educating patients about dietary adjustments teaching only medical students
Answer:
specializing in the endocrine system
Explanation:
source: bro trust me
Answer:
specializing in the endocrine system
Explanation:
What is the answer to number 1
Answer:hi
Explanation:hi
Answer:
TTT GCC AGT
Explanation:
What does a shaded square mean on a pedigree
Answer:
Explanation:
A completely shaded circle or square indicates that a person expresses the trait. A circle or square that is not shaded indicates that a person neither expresses the trait nor is a carrier of the trait.
hope this helps
have a good day :)
Describe the reproductive system in humans.
Answer:
The human reproductive system includes the male reproductive system which functions to produce and deposit sperm; and the female reproductive system which functions to produce egg cells, and to protect and nourish the fetus until birth. Humans have a high level of sexual differentiation.#carryonlearning
Ecosystems: Relationships: Question 4
Look at the table.
Environmental Level Content of the Level
1
a fallen tree rotting in a forest
N
all the living things in the fallen tree
3
the ants in the fallen tree
4
an ant
Which level of the table is best labekd organism?
Select one:
Answer:
an organism is any living thing..including ants...
brown eye color is dominant; blue is recessive. If a brown-eyed man marries a blue-eyed woman and they have a brown-eyed boy and a blue-eyed girl, what can we conclude about the parents?
Answer:
Q:
Brown eye color is dominant; blue is recessive. If a brown-eyed man marries a blue-eyed woman and they have a brown-eyed boy and a blue-eyed girl, we can safely conclude that:
A:
the man is heterozygous.
Explanation:
Answer: first baby - dads dominant brown colored eyes
second baby - both of moms genes becuase you need two recessive genes to have a recessive trait
Which concluding sentence best accomplishes arthurs goal of maintaning his current organization
Answer:
1
Explanation:
lol i don’t feel like sleeping anyone else
Answer:
What is sleep...
if it's edible sign me up!
In the world of purple people eaters, one eye (E) and one horn (H) are dominant traits. Purple people eaters
can also have two eyes (e) and two horns (h), which are recessive traits.
Perform a dihybrid cross among a male who is heterozygous for both traits and a female
who is heterozygous for both traits. Use the results for your prediction below.
HOW MANY ONE-EYED TWO-HORNED PURPLE PEOPLE EATERS ARE THERE?
O 3
1
0
Ο Ο Ο
16
9
O4
12
the answer is 16 because its like greater then you now what am saying its the correct answer
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.
Which of the following pictures is NOT an example of deposition? A. B. Picture C Picture D Picture B Picture A
Answer:
picture A.
Explanation:
Which of the following is true about the coasts of North and South America? O A. Little industry is located along the coasts, B. There are few cities and the population is sparse. O c. A majority of the population is located there. D. People go to the coasts only when on vacation,
Answer:
The correct answer is C. In North and South America, a majority of the population is located on the coasts.
Explanation:
Historically, the vast majority of civilizations have sought to establish their urban centers around bodies of water, be they rivers or seas, that allow them a rapid expansion outward as well as channels through which to channel trade. Thus, it can be seen how throughout the world and especially the American continent, large cities and population centers are located primarily on the coasts. Examples of this situation are Vancouver in Canada, New York and Los Angeles in the United States, Rio de Janeiro in Brazil or Buenos Aires in Argentina.
Climate change is leading to many changes to populations around the world. Some species are now able to live in environments that were to cold before. Other species are moving to areas more like the habitat they are most suited to. When a species moves into an area it is called ____, and when it moves out of an area it is called ____.
A
immigration, emigration
B
emigration, immigration
C
migration, extinction
Answer:
The correct answer is - A. immigration, emigration.
Explanation:
In biology, immigration is the act of joining or entering a new species or population of organisms into a particular area or population. These new species carry new alleles and traits with themself in the area and population increasing the population.
On other hand, emigration is the act of leaving the area where a population used to live due to changes in the habitat or the particular habitat is not suitable anymore for the population.
if hypertonic has more solutes than hypotonic does hypertonic have more or less water?
Answer:
Explanation:
Hypertonic solutions have less water ( and more solute such as salt or sugar ) than a cell. ... Hypotonic solutions have more water than a cell. Tapwater and pure water are hypotonic. A single animal cell ( like a red blood cell) placed in a hypotonic solution will fill up with water and then burst.
What is an advantage of using nuclear power?
A. Nuclear energy is very inexpensive.
O B. Nuclear energy is readily available.
O C. Nuclear power plants produce no greenhouse gases.
D. Nuclear power plants do not produce waste products.
Nuclear power plants produce no greenhouse gases. Therefore, option (C) is correct.
What is nuclear power plant?A nuclear power plant is a facility that generates electricity through the process of nuclear fission, which involves splitting atoms of uranium or plutonium to release energy in the form of heat. This heat is then used to produce steam, which drives a turbine to generate electricity. Nuclear power plants are a type of thermal power plant, which also includes coal-fired and natural gas-fired power plants.
Nuclear power plants are considered a form of low-carbon energy, as they do not produce greenhouse gas emissions during operation. However, they do produce radioactive waste, which is hazardous and requires careful management and disposal. Nuclear power plants also carry the risk of accidents and meltdowns, which can have serious environmental and health consequences. Despite these risks, nuclear power remains an important source of electricity in many countries around the world.
Learn more about nuclear power, here:
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how to calculate average molarity
Answer:
To calculate the molarity of a solution, you divide the moles of solute by the volume of the solution expressed in liters.
Explanation:
The molarity (M) of a solution is the number of moles of solute dissolved in one liter of solution. To calculate the molarity of a solution, you divide the moles of solute by the volume of the solution expressed in liters.
Fill in the blanks
8.______ _______is the "Father" of modern genetics, who used _______
to understand important concepts of genetics and heredity.
9. A mutation is a change in the ________ of an organism that can cause ______ but sometimes can be _______ to an organism.
11. If the gene pairs are identical, a person is called _______.
12. If the gene pairs are different, a person is called _______.
Answer:
DNA and chemistry which is passed through blood
