Answer:
C
Explanation:
According to the endosymbiotic idea, a few eukaryotic cells' organelles were previously prokaryotic microorganisms. Chloroplasts and mitochondria divide by binary fission. Therefore, option (C) is correct.
What is Endosymbiotic Theory ?According to the endosymbiotic theory, eukaryote cell organelles like chloroplasts and mitochondria descended from separate bacteria that eventually developed symbiotic relationships with other cells.
Both mitochondria and chloroplasts have circular, single-stranded DNA in addition to not having histones. Prokaryotes are the only organisms that have single-stranded, circular DNA. They contain their own ribosomes to translate and make proteins. These qualities would enable the mitochondria and chloroplasts to thrive on their own, supporting the endosymbiosis theory.
Therefore, option (C) supports the theory of the endosymbiotic origin of chloroplasts.
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Which part of the
upper respiratory
system is designed to
interact with food and
air?
A. larynx
B. nose
C. pharynx
D. trachea
Answer:
C.Pharynx
Explanation:
Which of these organelles is NOT in animal cells?
Ribosome
Endoplasmic Reticulum
Cell Wall
answer h and i urgently
no explanation needed
Answer:
h. I think option c growth of an organism in not true
What type of organisms make up the majority of life on the surface of the pelagic zone?
chemosynthetic bacteria and invertebrates
seaweed and fish
mollusks and seaweed
plankton and algae
The types of organisms that make up the majority of life on the surface of the pelagic zone are plankton and algae. That is the last option, as plankton and algae are the primary producers in the surface layer of the pelagic zone.
What are the zones of water?
The pelagic zone is the open ocean area that comprises the largest ecosystem on Earth. It is divided into different layers depending on the depth and amount of sunlight that penetrates the water. The surface layer of the pelagic zone, also known as the photic zone, is the layer that receives enough sunlight for photosynthesis to occur, and it is where most of the ocean's primary production takes place.
Hence, the types of organisms that make up the majority of life on the surface of the pelagic zone are plankton and algae, which is the last option.
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Which substance, maple syrup or vegetable oil, has a higher viscosity? Explain how you know the answer.
Answer:
maple syrup
Explanation:
This is because viscosity is simply the resistance of a fluid to flow. A thicker fluid is more resistant than a lighter one. In this case maple syrup is thicker than vegetable oil thus more viscous than it.
Unique feature of osmosis is that
(1) energy is required
(2) it involves movement of solutes
(3) it occurs across membranes only
(4) it is seen only in animals
Answer:
I believe the answer is (3)
Explanation:
"Osmosis is a special type of diffusion, namely the diffusion of water across a semipermeable membrane"
"Osmosis only occurs with a semipermeable membrane"
Khan and sciencedirect
What is a nerve’s long threadlike bundle that conducts electrical impulses?
Answer:
A nerve is actually a long threadlike bundle of dendrites that conduct electrical impulses. Dendrite word derived from the Greek word 'dendron' which means tree. They carry messages in the form of electrical impulses to cell body, there are also wire like nerves called axon.
Explanation:
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A group is considered monophyletic if
A. all members of the group share a common ancestor that is included in the group.
B. all members share homoplastic traits.
C. the group does not contain the most recent common ancestor.
D. not all descendants of the common ancestor are included.
E. it is the most parsimonious grouping.
Define hypothesis
Thx!
Answer:
a supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation.
"his ‘steady state’ hypothesis of the origin of the universe"
Which of the following would be examples of abiotic factors in a mountain river ecosystem?
fish, algae, and sand
sand, water, and fish
sand, water, and minerals
water, fish, and algae
6. What do fungi have in common with animals?
Answer:
Fungi are more like animals because they are heterotrophs, as opposed to autotrophs, like plants, that make their own food. Fungi have to obtain their food, nutrients and glucose, from outside sources. The cell walls in many species of fungi contain chitin.
You will create a molecular clock model for an arthropod gene. Follow these guidelines to make your model:
Your timeline will span from 90 million years ago to the present. The common ancestor in your model is an arthropod that lived 90 million years ago. The gene that you’ll track codes for a protein in the species’ venom.
The DNA sequence you’ll track contains 10 nitrogen bases. You can choose the order of the bases and where the mutations occur.
This gene mutates at a rate of approximately 0.76 base pairs every 17.1 million years. To build your model, calculate the estimated time period it takes for 1 base pair to mutate.
The first time period will only show the common ancestor. At the beginning of the second time period, three lineages will diverge from the common ancestor, each with a different mutation in their gene sequences.
The first and third descendant species will survive for the rest of the timeline. The second descendant species was extinct 50 million years ago.
Calculate how long it will take for one full base pair mutation to occur. Explain your reasoning by constructing a mathematical equation.
Answer:
The mutations occur at a rate of 0.56 base changes every 1 billion years. If this rate stays consistent, the mutation rate can be used to determine when different lineages of a particular species split
Answer:
It takes about 17.1 Million years for a base pair to mutate at a rate of 0.76 base pairs. To get the time it takes for one full mutation to occur, you must divide 17.1 to 0.76 and multiply it by 1. So, (17.1/0.76)×1=22.5. It would take about 22.5 million years for one full base pair mutation to occur. Having this being said, the first descendant with one base pair mutation would change after 22.5 million years from the common ancestor. For the second descendant, it would take 45 million years as 22.5 time 2 is 45. 5 million years later, the second descendant will become extinct while the first descendant survives. The third descendant will take about 22.5×3= 67.5 million years. Now, the first and third descendants will survive while the second descendant is extinct.
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what are the main layers of Earth's interior and the indirect evidence that helped us determine the layers?
Answer:
Explanation:
layers of earth
crust
mantle
outter mantel
inner mantle
core
outter core
inner core
Which OF THESE is a reason why a bird 'sings'?
a. To mark out its territory to others of its own species
b. To frighten other birds that may attack / eat it
c. To attract its food like worms and insects
d. To wake up other birds and animals
Quick
Based on this map, which of the following countries do you think contributes most to global climate change?
Answer:
The answer is C.united states
This type of behavior is important to...?
what are chromosomes
A. strands I'd DNA wrapped around proteins.
B. The alleles that cause certain traits.
C. Any organism that cause contains DNA
D. A form of virus that infects cells.
Answer:
A. strands I'd DNA wrapped around proteins.
Explanation:
DNA is securely packed within the nucleus by chromosomes, which are thread-like structures. Histone proteins offer structural support for DNA by coiling it around them. During cell division, chromosomes assist in the replication and distribution of DNA. Each chromosome has a centromere, which separates the p (short) and q (long) arms. The centromere is found at the constriction point of the chromosome, which may or may not be the center.
OAmalOHopeO
oil-rich countries in the middle east cover about 4% of earth's total land area but posses about 48% of the world's known oil reserves. what is the main reason for high concentration of reserves in this part of the world?
The correct answer is A. Geological processes.
Explanation
Oil is a hydrocarbon of fossil origin by geological processes that transforms large amounts of organic matter deposited on anoxic bottoms of seas or lake areas of the geological past, which were later covered by heavy layers of sediment. This causes organic materials to be transformed into oil by the heat and pressure of the upper layers. However, this phenomenon does not occur in all parts of the earth because in some, as in the case of the Middle East, there were large amounts of organic matter that became an oil reserve. So the correct answer is A.
explain the reason for the variation in production by referring to the possible causes for variation in a population
Genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).
which class question is this?
identify 3 organisms that belong in the same phylum as Protozoans
Answer:
Algae, Protozoa, Heterotrophs
Explanation:
Glycolysis and gluconeogenesis are opposing pathways in that they begin or end with the same metabolites and share common intermediates and/or enzymes. Yet, for energetic reasons, the two processes cannot be the exact reverse of each other. How is this possible
Answer:
Due to difference in their products.
Explanation:
Glycolysis and gluconeogenesis are not exact reverse to each other because in glycolysis, glucose is converted into pyruvate, adenosine triphosphate (ATP), NADH, protons i.e. hydrogen ions and water whereas in gluconeogenesis, pyruvate is converted into glucose and glycogen. So due to the formation of different products of each process we can say that glycolysis is not exact reverse of gluconeogenesis.
which of the following is true for a eukaryote?
A. it is one of the first life forms to appear on earth.
B. it doesn't have a nucleus and organelles.
C. it must be a multicellular organism.
D it evolved from prokaryotes
Answer:
D it evolved from prokaryotes
Explanation:
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Functions of the organs of amoeba
Answer:
nucleus – the major organelle of the amoeba, located centrally; it controls reproduction (it contains the chromosomes) and many other important functions (including eating and growth). pseudopods – temporary “feet” that the amoeba uses to move around and to engulf food.
Explanation:
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What is the function of the Xylem in a leaf?
What is the Constant of “which bait works best for a fly trap?”
Answer:
Mix scraps of meat (the older, the better) with something sweet. Lots of people swear by using rotten fish or shrimp, which probably work best because they smell so much. Bait for Fruit Flies: Use fruit (the riper, the better), apple cider vinegar, fruit juice, syrup, wine, beer, or any combination
How do bryophytes differ from tracheophytes?
Answer:
The main difference between bryophytes and tracheophytes is that bryophytes are nonvascular plants, whereas tracheophytes are vascular. Mosses, liverworts, and hornworts are examples of bryophytes, whereas ferns, gymnosperms, and angiosperms are examples of tracheophytes
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difference between diabetes mellitus and diuresis?? please help
Explanation:
If you have been in EMS long enough, you may well have encountered a patient with diabetes insipidus. Like many, you may have assumed that it is a variant of the common disease diabetes mellitus. Actually, diabetes mellitus and diabetes insipidus are totally unrelated other than the name. The term diabetes is derived from Latin (originally Greek) and means “to go through or siphon,” referring to a large amount of urine produced by the kidneys. The term melitus, in Latin, means “sweet.”
Which of the following correctly describes the formula for speed?
Answer:
im sorry there are no options to the question
Answer:
Speed = Distance/ Time taken
Which of the following best descrites an example of how genetic codes of organisms have been used to help hierarchically classity living things?
A) The common nucleic acid sequences of polar bears and black bears can be
deduced from their classification in the same genus, Ursus. (WRONG)
B) Viruses contain DNA which is used to classity which hosts they will
infect into a Linnacan taxonomy of viruses.
C) Since kangaroos and opossums both have developed pouches to carry their young, it proves that they share DNA sequences and belong to the same
D) Even though Eubacteria and Archaebacteria look similar, differences in their ribosomal RNA led to their classification into different domains,
Answer:
Even though Eubacteria and Archaebacteria look similar, differences in their ribosomal RNA led to their classification into different domains.
Explanation:
took the test and got it correct
Even though Eubacteria and Archaebacteria look similar, differences in their ribosomal RNA led to their classification into different domains. The correct option is D.
What are Eubacteria?Eubacteria are bacterial counterparts. They go under the name "real bacteria." They lack membrane-bound cell organelles and a genuine nucleus. These are single-celled, tiny creatures.
Contrary to appearances, Eubacteria and Archaebacteria (also known as Archaea) are divided into distinct realms of life based on variations in their genetic make-up, particularly in the sequences of their ribosomal RNA (rRNA).
Together with Eukarya, Eubacteria and Archaebacteria are currently acknowledged as distinct domains of life.
This classification represents the underlying biological differences between the two categories, including variations in cell walls, lipid membranes, and metabolic pathways.
Thus, the correct option is D.
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how does a single cell give rise to all the different types of cell, tissue, and organs in human body
Answer:
Over the course of hours, days, or months, the organism turns from a single cell called the zygote (the product of sperm meeting egg) into a huge, organized collection of cells, tissues, and organs. As an embryo develops, its cells divide, grow, and migrate in specific patterns to make a more and more elaborate body.
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