Answer:
El árbol de la vida o árbol universal de la vida es una metáfora, modelo y herramienta de investigación que se utiliza para explorar la evolución de la vida y describir las relaciones entre organismos, tanto vivos como extintos, como se describe en un famoso pasaje de El origen de las especies (1859) de Charles Darwin.2
Explanation:
Question 14 1 points) What type of mutation has occurred in the following example? Original DNA Sequence ATC G G C T A A G G C A Mutated DNA Sequence A TCA GG CT A G G C A) deletion mutation B) germ-cell mutation C) insertion mutation.
Answer:
B) germ-cell mutation is the answer
According to the endosymbiotic theory of the origin of eukaryotic cells, how did mitochondria originate?
a) when a protoeukaryote engaged in a symbiotic relationship with a protocell
b) from infoldings of the plasma membrane, coupled with mutations of genes for proteins in energy-transfer reactions
c) from the nuclear envelope folding outward and forming mitochondrial membranes
d) by secondary endosymbiosis
e) from engulfed, originally free-living proteobacteria
Answer:
e) from engulfed, originally free-living proteobacteria
Explanation:
The bacterium was captured by a eukaryotic cell and then the cell evolved into the mitochondria we know today!
According to the endosymbiotic theory of the origin of eukaryotic cells, mitochondria formed from engulfed, originally free-living proteobacteria. The correct option is e.
What is proteobacteria?Proteobacteria are a major phylum (group) of bacteria. Pathogens such as Escherichia coli, Salmonella, Vibrio cholerae, Helicobacter pylori, and many others are among them.
Others are free-living, and they include many of the bacteria that fix nitrogen.
Proteobacteria, which includes mesophilic and neutrophilic bacteria, is the second largest phylum of hydrogenogenic CO oxidizers. Members of this phylum can be found in a variety of classes.
According to the endosymbiotic theory, mitochondria and chloroplasts were once free-living bacteria that were phagocytized but not digested by another cell.
According to the endosymbiotic theory of eukaryotic cell origin, mitochondria evolved from a rickettsia that was phagocytized but not digested by the larger cell.
Thus, the correct option is e.
For more details regarding proteobacteria, visit:
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The site which responds to the hormone?
Answer:
Most hormones circulate in blood, coming into contact with essentially all cells. However, a given hormone usually affects only a limited number of cells, which are called target cells. A target cell responds to a hormone because it bears receptors for the hormone.
Answer:
According to toppr
Receptors are specific proteins located on target tissues to which specific hormones bind to produce their effect.
Binding of a hormone to its receptor leads to the formation of a hormone-receptor complex. Formation of Hormone-Receptor complex leads to certain biochemical changes in the target tissue.
Hence Receptor site responds to a hormone.
So, the correct answer is 'Receptor'.
Not my own words, I have cited so I am not plagerizing
Explanation: :)
HELP:((!
I need help on answering these 2 questions based of the following chart:
1. Which cancer type is most common? Least common?
2. Which cancer type seems to be least treatable? Most treatable?
Answer:
1. Common: Skin (Basal) Least common: skin(melanoma)
2. Least: Lung cancer Most: skin (basal)
Explanation:
The light color are cases.
The darker color is deaths.
All I did was observe the table.
Answer:
2
Explanation:
How do I revise efficiently?
I have a biology test and I want to get a good grade so I am currently trying to learn how to revise. I have 0 experience in revising since I usually have good grades in tests and all but I don't feel confident with biology...
Answer:
Try to stay focused and make sure any distractions you have around are put away. This will help you focus!
Explanation:
Try chewing on a piece of gum while revising and chew the same flavor of gum when you take the exam this will help you remember everything you studied.
Also, don't forget to say "Rabbi Zidni ilma"
what's the most common way to vote using parliamentary procedure?
Answer: Ye ye
Explanation:
itssss bbbbbbbb
In peas, the green pod color (G) is dominant to the gene for yellow pod color (g). If two heterozygous plants (Gg) are crossed. What percent of the offspring will be Green?
0%
25%
50%
75%
Answer:
75
Explanation:
took the test
What is the correct answer???
Answer:
U U G
hope you have a good day/night make sure to do good in school and try your best :)
Which animal doesn't belong to odd toed ungulates ?
Answer:
Odd-toed ungulates include the horse, the tapir, and the rhinoceros.
Explanation:
look at the following photographs. what two ways are microorganisms used in the making of cheese?
Please attach photograph
4. "Hybrid" means "crossing" or "combination
O
True
O
False
Answer:
False
Explanation:
sorry if it's wrong
Can anyone can tell me this is right? or wrong?
Thank you.
Answer:
yes this is correct, good luck!
Explanation:
Carbohydrates act as a main source of energy for the cell.
Lipids provide insulation.
Proteins help speed up cellular reaction, and they also regulate the cell.
Nucleic acid carries the genetic infomation.
hope this helps :)
Answer:
Correct, well done!
Explanation:
What are the coefficients of the following chemical equation?
C + O2 -> CO
Answer:
C = coefficient of 1
O2 = coefficient of 1
CO = coefficient of 1
2. What evidence was found to support the different parts of cell theory?
Answer:
The invention of the electron microscope allowed them to see organelles and other structures smaller than cells. There is variation in cells, but all cells have a plasma membrane, cytoplasm, ribosomes, and DNA. These similarities show that all life on Earth has a common ancestor in the distant past
Which region of the Ig molecule interacts with the antigen? What makes the region suited for this purpose?
Answer and Explanation:
Immunoglobulins (Ig) are proteins that are composed of 4 polypeptidic chains: 2 heavy chains (H) and two light chains (L). They assemble in a structure with a 'Y' form. This structure has two regions: the Fab region and the Fc region.
The region of Ig which interacts with the antigen is the Fab region. That is possible because the Fab region presents variability in the amino acid sequence which determines the specific complementary shape with the antigen structure (like a lock and the key).
Do all cells have the same DNA? Explain, please.
Which statement regarding the relative ages of rocks and events is
accurate? *
A. Intrusive rock is older than the surrounding rock layers.
B. A fold is older than the oldest rock layer it contains.
C. Faults are younger than the youngest layer they cut through.
D. Rock layers that have been overturned are oldest from the base to the surface.
Answer:
C. Faults are younger than the youngest layer they cut through.
Explanation:
A. Intrusive rock is older than the surrounding rock layers. WRONG. The intrusive rocks are those that solidify underground and always form after the ones around them. So they are younger than the surrounding rocks.
B. A fold is older than the oldest rock layer it contains. WRONG. First, layers are set, and then, it occurs the folding. The folding is always younger than the involved layers.
C. Faults are younger than the youngest layer they cut through. RIGHT. A fault is a cut through different layers that occurs when the sedimentary rock breaks transversally. It occurs always after the sedimentary rock is already formed. So the fault is always younger than all the layers it cuts through.
D. Rock layers that have been overturned are oldest from the base to the surface. WRONG. If overturned, according to the superposition low, layers are oldest from the surface to the base. Superposition law states that during the sedimentary rock formation, the oldest layer is always that one at the bottom, while the younger layer is the higher one.
Choose all the answers that apply. Precipitation:
a.creates new water
b. occurs after condensation
c.is roughly equal to the amount of evaporation
d. occurs evenly all over the earth
e. returns freshwater to the earth
Answer: e and a
Explanation:
Answer:
occurs after condensation
is roughly equal to the amount of evaporation
Explanation:
The Florida Everglades is a large warm wetland with many plants and animals. Which of Earth’s systems interacts with the biosphere in the Florida Everglades?
A.
hydrosphere, geosphere, and atmosphere
B.
hydrosphere, atmosphere and cryosphere
C.
hydrosphere only
D.
hydrosphere and geosphere only
Answer:
a
Explanation:
What do acids react with in limestone to form giant cave systems?
metals
hydroxides
carbonates
lipids
name 2 locations where the soil types have the most carbon in them
Answer:
(1) as organic molecules in living and dead organisms found in the biosphere; (2) as the gas carbon dioxide in the atmosphere
Explanation:
Adult hyrdras are _________, meaning they do not move.
What is the ultimate purpose of the nuclear reaction in a nuclear power plant
Answer:
I heats water to produce steam thar spins a turbine.
Definition: This is is a medical procedure used in prenatal diagnosis of chromosomal abnormalities in
which a small amount of amniotic fluid is extracted amniotic sac surrounding a developing fetus and the
fetal DNA is examined.
Answer:
Amniocentesis
Explanation:
It involves inserting a long needle to extract fetal cells from the fetus's surrounding fluid for these diagnostic purposes. It is a risky procedure that has since been widely replaced by cell-free DNA testing.
4. Which of the following is true regarding genetic mutations?
a. All mutations are harmful.
b. All mutations are beneficial to the organism.
c. Mutations can be harmful, beneficial, or have no effect on the organism.
Answer:
C
Explanation:
mutations can be harmful, helpful, or neutral depending on the environment
Distinguish between the following pairs.
a.active transport and passive transport
b. exocytosis and endocytosis
c diffusion and osmosis
d. hypertonic and hypotonic
Answer:
Explanation:
a. active transport is against the concentration gradient and uses atp. facilitated diffusion is with the concentration gradient and doesn't use atp
b. endocytosis is substances being engulfed in the cell membrane, exocytosis is substances being released from the cell membrane
c. diffusion is the movement of particles through the membrane and osmosis is specifically the movement of water
d. hypertonic means more solute, hypotonic means less solute.
All animals have the same tolerance range.
True
False
Answer:
False
Explanation: Diffrent animals have different tolerance ranges
please help me with this homework problem!!
Answer:
the last one. Tt and tt
Explanation:
the answer is Tt and tt because
What are the benefits of a Cowrie shell?
Answer:
Please mark Brainliest
"Cowrie shells are known as the most successful and the best form of currency in the various regions of the world. According to the African legends, the cowrie shells are representing the goddess protection which is highly powerful and is connected with the strength and power of the Ocean."
a car acceleration from a 10 m/s to 60 m/s in 12 seconds. what is the acceleration
Answer:
4.167 m/s^2
Explanation:
vi = initial velocity = 10 m/s
vf = final velocity = 60 m/s
t = time = 12 s
a = acceleration, unknown
Use the following equation to find a:
(vf - vi)/t = a
(60 - 10)/12 = 4.167 m/s^2
4.167 m/s^2 = a
Hope this helps!! :)
