Answer:
Explanation:
The first piece of evidence that needed to be found to support the endosymbiotic hypothesis was whether or not mitochondria and chloroplasts have their own DNA and if this DNA is similar to bacterial DNA. This was later proven to be true for DNA, RNA, ribosomes, chlorophyll (for chloroplasts), and protein synthesis.
Scientists have discovered homeotic genes in many kinds of organisms, including fruit flies, mice, and humans. These homeotic genes regulate gene expression and control patterns of development in specific regions of young embryos. Molecular biologists have learned that homeotic genes share a very similar nucleotide sequence, which controls the development of similar portions of fly and mouse embryos. They have found a similar set of genes in humans, which also control corresponding regions of the developing human embryo.
Which of the following statements summarizes a conclusion based upon the evidence contributed by molecular biologists?
Homeotic Genetics
A.
Patterns of development among different animal species did not evolve from a common ancestor.
B.
Humans evolved from flies.
C.
Similar patterns of development increase an organism’s likelihood of surviving and reproducing.
D.
Fruit flies, mice, and humans provide evidence of divergent evolution.
Answer:
D
Explanation:
The presence of homeotic genes shows that all of the listed organisms (mice, flies, humans etc) all evolved from a common ancestor.
(A) is wrong as the evidence of the same gene existing in vastly different species shows the evolutionary relationship between these organisms.
(B) is wrong as there is insufficient evidence to prove that flies are the precessor of humans. We do know that flies and humans have evolved from a common ancestor though.
(C) is non-conclusive as the passage said nothing about the gene allowing the species to have a higher chance of surviving and reproducing. Hence, an errornous claim.
(D) is the correct answer as from a common ancestor, all of the listed organisms undergo and accumulates mutation, undergoes selective pressures that resulted in divergent evolution (aka branching evolution that results in many noval species forming) after millions of years.
Distinguish ways surface waters can be
polluted. Why is it important to understand
how each way impacts water quality?
When we study the owl’s food options, what type of ecological relationship are we observing?
Answer:
Predation
Explanation:
The owls are preying on their food, which is an example of the ecological relationship of predation in which the predator, the owl, eats the prey, the food options.
what is the highest summer temperatures at 7,500 feet in elevation
How would an organisms homestasis be affected if it was not able to produce enzyme
Answer:
it is possible to happen Without enzymes, the temperature inside cells would increase rapidly.
Explanation:
Isn't evolution just a theory that remains unproven?
Answer:
A scientific theory stands until proven wrong -- it is never proven correct. The Darwinian theory of evolution has withstood the test of time and thousands of scientific experiments; nothing has disproved it since Darwin first proposed it more than 150 years ago.
Explanation:
Answer:
evolution is only marked by chance, without any orientation, neither necessary nor probabilistic.
Explanation:
Each lunar cycle has one full moon, in which the relative positions of Earth, the sun, and the moon form a straight line. Which list represents the positions of Earth, the sun, and the moon during a full moon?
Group of answer choices
Answer:
The moon is on the opposite side of earth as compared to the sun
Explanation:
It reflects the suns light like a mirror onto earth and also you should know this
Answer:
When Earth, the sun, and the moon align to form a right angle, which type of tides takes place?
Explanation:
Use the drop-down menus to indicate where each endocrine system structure is located.
The thyroid, parathyroid, and thymus are located in the
The adrenals, pancreas, testes, and ovaries are located in the
The pineal, hypothalamus, and pituitary are located in the
Answer: 1. Throat
2. Abdomen
3.Brain
Explanation:
Whales are covered in a think layer of blubber, insulating their bodies incold ocean water
Answer: Yes this is correct.
Explanation: whales insalate themselves to stay warm, the reason why they do this is because they travel to cold regions to get food.
Answer:
Whales are warm blooded marine mammals that can tolerate cold water temperatures. Whales use blubber as an insulation layer to help maintain the energy and warmth when they dive to cool depths or travel to cold waters such as in Alaska. The blubber layer is a thick (6 inches) layer of fat that is found under the skin.
Explanation:
MDHR:
Money
D0pe
Homies
Respect
Explain the relationship between the sensors, control center communication systems and targets when maintaining homeostasis.
Answer:
Homeostasis es la constancia del Medio interno, aún frente a las variaciones del Medio externo
(Cannon). El Medio interno se relaciona con la complejidad de los seres vivos.
Según Teoría de la Evolución, el primer ser vivo surgió en el mar, formado por una sola célula, la cual
intercambiaba nutrientes y desechos metabólicos con su Medio externo.
De los Unicelulares evolucionaron los Pluricelulares, los cuales debían solucionar el problema del
intercambio de nutrientes, oxigeno y desechos de las células que se encuentran en su interior. De esta
forma se desarrolló un ambiente interno, que permitió la vida libre e independiente.
El Medio interno está representado por el Líquido extracelular que rodea a las células de los Pluricelulares,
con una composición estable que permite los intercambios metabólicos y la comunicación celular.
El 60 % del peso corporal humano es agua, la cual se encuentra distribuida en un 40% del peso corporal en
el Líquido intracelular y en un 20% en el Líquido extracelular.
Del total del Líquido extracelular un 80% corresponde al Líquido intersticial y un 20% al Plasma sanguíneo.
El Líquido intersticial o tisular debe mantenerse constante, para lo cual se requiere la ayuda del
Sistema circulatorio.
El Plasma sanguíneo intercambia oxigeno y nutrientes, dióxido de carbono y desechos con el Líquido
extracelular a nivel de los Capilares sanguíneos, debido a lo cual en ambos líquidos la concentración de
solutos es igual, a excepción de las proteínas.
Según Starling, existe un equilibrio entre el volumen de líquidos que sale del capilar arterial y el que
vuelve por los capilares venosos.
El Líquido intracelular varía de célula a célula del punto de vista cuantitativo, guardando similitud en la
composición celular desde el punto de vista cualitativo
Explanation:
3) Scientists who have examined the fossil record have noted that some species have changed very little over long
periods of geologic time. The lack of change in such organisms is most likely because
A) the environment that they lived in remained the same, and they were well-adapted to it
B) all members of their population were genetically identical, and they lived in a rapidly changing
environment
C) there was a large amount of variation in their population, and the environment changed frequently
D) they could move between different environments when food supplies became scarce
Answer:
The correct answer is option A) "the environment that they lived in remained the same, and they were well-adapted to it".
Explanation:
One of the basis of evolution is that species that face new environmental conditions tend to develop new traits to survive. The opposite applies to species that have lived in constant environmental conditions, these species are usually well-adapted and have changed very little over long periods of geologic time. Some species of tortoises are examples of animals that had changed very little in their evolutionary history. The hard shells of tortoises is an ancient adaptation that help them to survive in constant environmental conditions.
The lack of change in organisms in some species examined by scientist is most likely because A) the environment that they lived in remained the same, and they were well-adapted to it
What is adaptation?Adaptation can be regarded as the biological mechanism whereby organisms adjust to new environments or to changes in their current environment.
Therefore, the reason why some species have changed very little over long periods of geologic time is due to adaptation.
Learn more about Adaptation at:
https://brainly.com/question/16416932
Each pair of clay balls represents two planetesimals. If each planetesimal is composed of the same material and is separated he the same distance, which pair experiences the frayed gravitational attraction?
Answer:
Every object that has mass exerts a gravitational pull on the objects around it. Depending on how big the object is, more the pull it exerts will be in magnitude. A massive object such as the Earth will inevitably overwhelm all other gravitational attraction caused by objects on it. In this case of planetesimals, even though the materials are the same, the mass must be different for one to experience a greater gravitational attraction than the other.
Hope that answers the question, have a great day!
Answer:
Its the one on the top right corner
Explanation:
i just took the edmentum test and it was correct
A scientist wants to investigate the effect of water temperature on fish respiration. He takes one goldfish and places it in 100 ml of warm water, puts another goldfish in 100 ml of cold water and puts another one in 100 ml of room temperature water. He collects data by counting the respiration of each fish for 1 minute What are the constant variables (Fixed Variables)?
Answer:
fish because they put a goldfish in each one and only changed the type of water.
what’s the daily path the sun takes to orbit the milky way?
Which type of organism is Darwin's most famous example of natural
selection?
a. Monkeys
b. Finches
c. Alligators
d. Tigers
Which group of organisms in the aquarium contains the largest amount of energy? a) primary consumers, b) secondary consumers, c) producers, d) herbivores
Answer:
b) secondary consumers. This is because they are at the top of the food chain
please give brainliest! :)
I hope this helped
When/why matter changes its phase?
Which of the following is NOT one of the ways that the carbon
cycle adds CO2 to the air?
A. Cell respiration
B. Burning of fossil fuels
C. Cutting down forests
D. Industrial pollution resulting in acid rain
Almost all of the corn used for food in the world today comes from the duplication of a few selected genetic strains. Describe one benefit and one drawback of using this method.
Answer:
One benefit is the adaptability and survivability of the corn in a condition that favors this genetic strain.
They are all susceptible to almost the same unfavorable condition and lack adaptability.
Explanation:
Since all the corns have the same genetic strain, this means that they all are closely related and are probably progeny of the same long line of corn. Having the same genetic strain can be favorable if this strain has been selected to suit the conditions of their cultivation area and also to bolster resistance to some dangerous diseases.
In the case where a new condition or disease outbreak is the case, then this is a set back since the genetic strain has not been used to this new conditions. This can lead to extensive damage that may even be close to, if not lead to a complete extinction of this particular corn strain.
Answer:
The benefit is that corn plants will always yield a consistent product because farmers selected against negative genetic characteristics. However, if there’s an environmental change or the threat of a disease, there would be little genetic variation in the crop to improve its chances of survival.
Explanation:
Edmentum
Scientists are concerned about the rising levels of carbon dioxide (CO 2). What trait about this gas makes it so concerning to scientists?
Answer:
It is a greenhouse gas i.e. Its ability to contribute to Global Warming.
Explanation:
Carbondioxide (CO2) is one of the world's colorless, odorless and tasteless gases in air. It is the major product of cellular respiration by living organisms. The increase in level of CO2 in the atmosphere is a major concern to scientisits because they have the ability to trap heat, hence, called a GREENHOUSE GAS.
CO2, in conjunction with other gases like methane, are responsible for keeping the earth warm as they help trap heat energy from the sun. However, an increase in the level of these greenhouse gases is contributing to what is called Global Warming, which is the gradual increase in the temperature of the earth's atmosphere.
Brainliest for first answer. ONLY CORRECT ANSWERS!!!!!
Answer:
Volume of rectangular prism = 81 feet³
Explanation:
Volume of rectangular prism is same as volume of cuboid
Length = 9 ft
Width = 4 ft
Height = 2 [tex] \frac{1}{4} [/tex] ft = [tex] \frac{9}{4} [/tex] ft
Volume of rectangular prism = Length × Width × Height
= 9 × 4 × [tex] \frac{9}{4} [/tex]
= 36 × [tex] \frac{9}{4} [/tex]
= [tex] \frac{324}{4} [/tex]
= 81 feet³
Emulsification means what? MULTIPLE CHOICE.
A. The breakdown of fats
B. The breakdown of proteins
C. The breakdown of carbohydrates
D. None of the above
How do jellyfish swim??? How do they glow???
Do they evaporate???
Answer: Most jellies use a form of jet propulsion to move through seawater. ... This is what most jellyfish do. They squeeze their bodies in order to push jets of water from the bottom of their bodies to propel the jellyfish forward. Now check out another method of jellyfish propulsion, used by the comb jellyfish.....Aequorea jellies glow with a bioluminescent protein used in the biotechnology industry. ... Bioluminescence is light produced by a chemical process within a living organism. The glow occurs when a substance called luciferin reacts with oxygen. This releases energy, and light is emitted....Jellyfish seem to blend in with their environment, undulating gently with the ocean's currents, and with good reason: Their bodies are made up of as much as 98 percent water, says How Stuff Works. When they wash ashore, they can disappear after just a few hours as their bodies evaporate into the air.
Explanation:wow look how dumd I am -_-
what are the two claims about living creatures made by the Theory of Biological Evolution?
Answer:Plz mark Brainliest
Explanation:
The theory of Biological Evolution makes two very bold claims about living creatures: First: All living things on earth are related. They evolved from a common ancestor. Second: The evolution of living things is powered by natural processes. Things which can be studied and understood.
WILL MARK BRAINLIEST!!
write in your own words it doesn't need to be long!!
Answer:
If we look at the drug OxyContin we can see that if someone has built a tolerance two things would occur their current dose would leave them feeling as if they need more and the tolerance could lead to abuse in order to get the pain relieving benefits. Withdrawal are the effects that happen when someone builds a tolerance. These symptoms could include dizziness, nausea, clammy skin, etc. The medication user might have built a tolerance and is feeling the effects of withdrawal because they need more of the medication for it to have an effect on their pain levels as well as reduce the withdrawal symptoms. Withdrawal is the bodies response to no longer having the medication consistently equal in the blood brain exchange.
Explanation:
The head should be positioned in the of the body.
Answer:
The head should be positioned on top of the neck.
or The head should be positioned on top of the body
Explanation:
Which is an adaptation?
A. A monkey learns to avoid electrical shocks.
B. A mouse knows where food is stored in a house.
C. A person learns to drive a car.
D. A bird has feathers that help it fly farther.
Answer:
D
Explanation:
The rest of the options are learned, and are not adaptations.
Adaptations help an organism survive in an environment.
hope this helps :)
How many amino must be obtained in the diet because they cannot be made by the body ? A 2 ,B 5,C 10,D 20
Answer:
D: 20
Explanation:
The body needs 20 different amino acids to maintain good health and normal functioning. Hope this helps!
To measure the vast distance in space ,scientists use a unit called a ______, which is how far travels in one year.
The closest star to Earth is ______.
(Look at the picture)
Answer:
light-year; the sun
Explanation:
A light-year is the distance light travels in one year. This means that a light-year is a measure of distance, and is useful on a larger scale because of its large size (light travels a pretty big distance in a year!), so light-years are used by scientists to measure the vast distance in space.
The closest star to the Earth is the Sun.
Gravity is the natural phenomenon in which all objects with mass are attracted to (or gravitate towards) one another. Since gravity is neither a measure of distance nor a star, it doesn't fit any of the answer blanks.
Light is the portion of the spectrum of electromagnetic radiation that is visible to the human eye (between infrared and ultraviolet wavelengths). Since light is neither a measure of distance nor a star, it doesn't fit any of the answer blanks.
A megameter is an instrument for determining longitude by observation of the stars. Since a megameter is neither a measure of distance nor a star, it doesn't fit any of the answer blanks.
Betelguese is a star that is part of the Orion, notable because of its brightness and size, as well as the fact that it is likely to become a supernova in less than a million years. While Betelguese is a star, it isn't the closest star to the Earth. Therefore, it doesn't fit any of the answer blanks.
Hope this helps! :)
what is biogeogrphic isolation
Answer:
biogeographic isolation is the separation of members of a species through geographical or biological forces.
Explanation: