Answer:
- revealed that rRNA is highly conserved so can be used for classification
- have led to the development of a new taxonomic system divided into domains
Explanation:
The ribosomal RNA (rRNA) genes are widely used in evolutionary, phylogenetic, and phylogeographic studies as molecular markers because they represent nuclear genes that are highly conserved between species. However, it is important to highlight that rRNA genes form arrays at specific chromosomal sites, thereby they often exhibit pseudogenes that may interfere with their use as molecular markers (i.e., they produce multiple bands in the electrophoresis gel). In 1977, Carl Woese showed that Archaea is an evolutionary lineage separated from Bacteria by using molecular evidence based on an rRNA molecular marker (16S rRNA). Thus, Woese indicated that Eukarya, Bacteria and Archaea represent three different domains that arose separately from an evolutionary ancestor named 'progenote'.
Which factors involving the activities of people are a threat to biodiversity? pollution and succession habitat loss and predation poaching and habitat loss succession and poaching
Both poaching and habitat loss are a threat to biodiversity
Habitat loss refers to the destruction of natural ecosystems and consequent reduction in the amount of habitat available for the species living in a given area. Habitat loss is the greatest threat to ecosystems biodiversity and conservation worldwide by deteriorating natural areas and thereby reducing species distribution ranges. Habitat loss is primarily due to the expansion of human populations and human activities (i.e., mining, logging, trawling, industrial production, urbanization, etc.).
Poaching refers to the illegal killing of wild animals for different reasons (e.g., meat, recreation, etc.), in violation of international, federal, state/provincial, or local laws. Poaching can drastically reduce the number of organisms in natural populations, thereby this human activity can reduce genetic diversity and eventually may lead to the extinction of natural populations/species.
In conclusion, both habitat loss and poaching can reduce the number of organisms, reduce biodiversity and eventually cause the extinction of natural populations.
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Answer:
C. Poaching and habitat loss
Explanation:
Test 100%
Also, good luck to whoever may need this anwer<3
Which process connects glycolysis and the citric acid cycle?
A. lactic acid formation
B. acetyl CoA formation
C.electron transport
D. Krebs cycle
Answer: the answer is B
Explanation: i lied lolololloloolollololol
What organisms, other than bacteria, are able to perform nitrogen fixation?
a.
Viruses
c.
Algae
b.
Trees
d.
Protists
Answer:
Algae is able to perform nitrogen fixation.
Answer:
The answer is C.
Explanation:
I just took the test and the answer was c.
essential amino acids cannot be produced by the body,so they must come from our diet.we can get them from eating's foods that contain which biomolecule
Answer:
Essential amino acids cannot be made by the body. As a result, they must come from food.
The 9 essential amino acids are: histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine.
Explanation:
pls mark me as brainliest
Which organ system is responsible for coordination and integration of bodily functions as well as detecting changes inside and outside the body
According to the question, the answer is endocrine system it works with the nervous to control the internal organs it helps with regulation of the body hormones growth and reproduction.
What are 3 main functions of the endocrine system?Makes Hormones for Mood, Development, and Growth. Many different vital hormones are created and controlled within the endocrine system.Sends Hormones into Your Bloodstream.Regulates the Release of Hormones.Thus, endocrine system it works with the nervous to control the internal organs.
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why is it harder for a mountain climber to breathe when they are the top of a tall mountain like mount everest
Answer:
Hmm.
Explanation:
Because the air gets thinner the higher the elevation (like on Mount Everest).
It is harder for a mountain climber to breath when they are thr top of a tall mountain because there is lack of oxygen in the high evalation like mount everest
Which of the following is nota cation? mercurous ion sulfate Ca 2+ iron(III) ion
describe the impact of technology on the environment today
Under which circumstance does Mendel’s principle of independent assortment hold? a. only when there is crossing over b. only when traits are tightly linked (close together) on the same chromosome c. only when traits are on different chromosomes d. only when the traits are not influenced by selection
Answer:
c
Explanation:
Mendel's principle of independent assortment holds only when traits are on different chromosomes.
The independent assortment principle states that genes assort independently of one another. In order words, traits are independently inherited by offspring from parents. For example, the trait for eye color is independently inherited from skin color, height is independently inherited from feet size, and etc.
This principle only holds true when genes are located far away from one another on the same chromosome or when they are on different chromosomes entirely. Once genes are close to one another on the same chromosome, they become linked together and no longer independently inherited.
The correct option is c.
What happens to hydrogen bonds when water turns to ice?
Answer:
at temperatures low enough to turn off the disruptive effects of thermal motions, water freezes into ice in which the hydrogen bonds form a rigid and stable network.
Explanation:
Notice that the hydrogen bond (shown by the dashed green line) is somewhat longer than the covalent O—H bond.
A protein has 100 peptide bonds. How many amino acids does it have? Name the four elements found in amino acid.
Answer:
twenty amino acids
Explanation:
and
carbon
nitrogen
oxygen
hydrogen, for the second question
Which type of feed is typically fed to baby chicks?
crumbles
mash
pellets
scratch
What are the roles of the two test
groups in this
investigation?
A. Both are experimental groups, and each
Individually shows the effect of the direction
B. Dhe is the experimental group and one is the
control group, and together they show the
ellect of the direction of light.
C. Both are control groups, but only Test Group)
shows the effect of the direction of light.
D. Both are experimental groups, but only Test
Group 1 shows the effect of the direction of
light
Answer:
We would also need to see the investigation to be able to help sorry
Select the correct answer. Which property of a substance can be determined using a pH indicator? A. acidity B. boiling point C. density D. electrical conductivity E. thermal conductivity
Answer:
Acidity
Explanation: I took a test :)
Pls need help the question is up there already giving BRAINLEST to a good answer
Answer:
The last choice. Think of planets, the bigger they are, the stronger they attract to one another
Explanation:
hope it helps
HELP ASAP!!!
Which group of elements are present in all macromolecules in living things? (8.9A)
C, H, P, N
C, H, O
Na, CI, O
OS S. P, C, O
Answer: the answer is C,H,O
Explanation:Option B is correct
Answer:
c,h ,o
Explanation:
are human skin cells from inside the mouth prokaryote or eukaryotic?
Answer:
Eukaryotic
Explanation:
Why is it dangerous or bad for babies to be born too small or too early?
What does the nucleus consist of
Answer:
If you are talking about atomic nucleus then it's consist of protons and neutrons.
Explanation:
But if you're talking about cell nucleus
Then,
It contains nuclear envelope, nuclear lamina, nucleolus, chromosomes, nucleoplasm .
Answer:
Protons and neurons.
Explanation:
The atomic nucleus consists of Protons and neurons
In the thylakoid membranes, what is the main role of the antenna pigment molecules?
a) split water and release oxygen to the reaction-center chlorophyll
b) harvest photons and transfer light energy to the reaction-center chlorophyll
c) synthesize ATP from ADP and Pi
d) concentrate photons within the stroma
Answer: Option B.
harvest photons and transfer light energy to the reaction-center chlorophyll
Explanation:
In the thylakoid membranes,the main role of the antenna pigment molecules is harvest photons and transfer light energy to the reaction-center chlorophyll because the photon of light move until it get to a molecule in the chlorophyll. When it reaches the molecule, it causes an excitation of electrons in the chlorophyll. The energy then present allow it to break free from the chlorophyll atom, which indicate chlorophyll donating an electron and the energy that is absorbed is then converted to heat.
why do plant cells need chloroplast
Answer: Sample Response: Plant cells need chloroplasts so they can capture light energy to make food within the cells. Plant cells make their own food to produce energy that the cells use.
I need help with and i will give you a branlist and it’s science
Answer:
B
Explanation:
Nitrogen has 7 protons
QUESTION 1 to the lungs The spinal cord is a. anterior b. proximal c. posterior O d. distal
Answer:
Anterior
Explanation:
I googled it your welcome
unique physical features of pigeon
Answer:
There are many unique physical features that pigeons have.
Explanation:
Pigeons, according to studies, are surprisingly complex creatures. They have passed the "mirror test"(self recognition), can recognize others, and can recognize every letter of the human alphabet.
There are also incredible physical features.
Plumage is one of these. Their plumage varies, and is unique to the type of pigeon they are. Not only this, but they have the ability to walk, while most other birds hop about.
Something absolutely extraordinary about them is that they have a gland in their throat. That gland actually secretes milk for their offspring, so they have adequate nutrition to grow and develop.
Hope this helps.
2. How does the development of a nervous system and sense organs relate to increasing complexity of multicellular animals?
The development of nervous system and sense organs in multicellular organisms has led to evolution of species in a more complex manner.
Complexity of multicellular organisms• The development of nervous system and sense organs has permitted for a greater level of perception and better equipped organisms.
• It has permitted the organisms to collect resources, react to their surroundings, and take advantage of their surroundings.
• This has resulted in the organisms to survive longer and accommodate into bigger types of body.
• Such amendments has thus permitted organisms to become more complex and move up the food chain.
Thus, the development of nervous system and sense organs is associated with increasing complexity of multicellular animals.
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Which of the following is not part of the circulatory system? Group of answer choices Heart lungs Blood Vessels Blood
Explanation:
Lungs is not a part of circulatory system as it is the part of respiratory system.
What is an example of how technology is capable of changing society?
Technology can alter community through what becomes famous , like the cell phones that most people today have with them, and the fact that they have developed into phones with computer ability.
There are certain situation that arise as a outcome of a growing use of technology that impact the change, like Carpal Tunnel Syndrome causing shifts in the workplace, or a growing need for more technology like floppy discs changing to compact discs and DVD's.
How does technology change society?Technology has a more favourable impact on humans or society in comparision of negative impact.
It makes our life is more easier and cite us by providing resources or tool that make our life much easier.
Thus, Technology can Alter society through what becomes famous, like the cell phones that most people today keep with them, and the fact that they have developed into phones with computer ability.
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Answer:
Technology can alter community through what becomes famous , like the cell phones that most people today have with them, and the fact that they have developed into phones with computer ability.
There are certain situation that arise as a outcome of a growing use of technology that impact the change, like Carpal Tunnel Syndrome causing shifts in the workplace, or a growing need for more technology like floppy discs changing to compact discs and DVD's.
Explanation: edgen 100%
what is the amino acid responsible for increasing bone length
Answer:
alanine, arginine, glutamic acid, glycine, and proline—may play a role in bone health, principally through improved production of insulin and insulin‐like growth factor 1 and the synthesis of collagen and muscle protein
Explanation:
Which is a main function of lipids?
O providing energy storage
O transmitting genetic information
O forming bone and muscles
O fighting infection and disease
providing energy storage
You travel to Mars. You obtain a specimen that appears to have cells and responds to warm temperatures. Would this be classified as living or nonliving? living nonliving
Answer:
LIVING
Explanation:
I took the test and got it right :)