Answer: A. Excavates branched off before the evolution of mitochondria, so the absence is not surprising.
C. Since they are parasites of animals, they should be placed within the opisthokont branch of the tree.
E. Their lineage likely had mitochondria but lost them at some point.
Explanation:
Based on the information given, the conclusion that can be made about the monocercomonoides include:
• Excavates branched off before the evolution of mitochondria, so the absence is not surprising.
• Since they are parasites of animals, they should be placed within the opisthokont branch of the tree.
• Their lineage likely had mitochondria but lost them at some point.
Who was newton please explain fast
Newton was a scientist in the 1600's who discovered gravity. He also discovered the laws of physics.
answer:
the man who discovered gravity by an apple falling on his head
hope this helps :)
Which of the following is a skin sensory receptor for touch?
A) Pacinian corpuscle
B) Meissner's corpuscle
C) Ruffini body
D) free nerve ending
Meissner's corpuscle is a skin sensory receptor for touch.
Meissner corpuscles are responsible for the sense of touch or light pressure, that is, they are very sensitive to the movement of objects on the skin and to very low vibrations.
About Meissner corpuscles:
• They are located on the lips and fingertips and are very sensitive.
• Meissner corpuscles act when there is a soft and light touch, and when vibrations are less than 50 hertz.
• These receptors can be altered when there is the presence of diseases where both thermal and tactile sensitivity are altered.
Therefore, we can conclude that Meissner corpuscles detect fine touch, that is, they are receptors on the skin that are sensitive to low-frequency vibration.
Learn more about Meissner corpuscles here: https://brainly.com/question/6963352
A key difference between primary cell cultures and secondary cell lines is that:____.a. primary cell cultures tend to stay alive and divide longer than secondary cell lines. b. secondary cell lines are generally cancerously transformed and will divide indefintely. c. secondary cell lines grow slower than primary cell cultures.d. the cells in primary cell cultures do not divide.
Answer:
d. the cells in primary cell cultures do not divide.
A key difference between primary cell cultures and secondary cell lines is that the cells in primary cell cultures do not divide.
hope it helped you
Explanation:
The main difference between primary and secondary cell culture is that the primary cell culture contains the cells directly obtained from host tissue, whereas the secondary cell culture contains sub-cultured cells from primary cell culture.
Heat Transfer Mechanisms 1.In your own words, using the pennies activity, define the three different heat transfer mechanisms. Your definitions should include:
(i) information about how energy is moving
(ii) what is happening microscopically (that is, at the atomic level)
(iii) what phase(s) of materials is usually involved.
Answer:
The three modes of heat transfer are: 1) Radiation 2) Convection 3) Conduction
Explanation:
RADIATION:
It is the mode of heat transfer which requires no medium because the transfer of energy takes place in the form of electromagnetic radiations. The spectrum of radiations that contribute to the heat transfer via radiation is the wavelength ranging from 0.1 μm to 100 μm.
For example the heat from the sun reaches the earth via radiation that passes through space and then through the atmosphere of the earth.
CONVECTION:
It is the mode of heat transfer that takes place in a fluid matter. The molecules in this case move from one place to another due to the difference in density developed as a result of heat absorption.
Example, the boiling of water. When the water in a utensil is heated, the heat is supplied at the bottom. In such a case the molecules of the water absorb the heat resulting in increased intermolecular spacing and hence the water at the bottom becomes the least dense in the bulk of water mass in the utensil hence rises up at to the free surface of the fluid mass. Then the densest mass of the fluid occupies the bottom space and is heated by the heat source supplied. This chain continues.
CONDUCTION:
This is the process of heat transfer from one molecule to the next neighbouring molecules. The propagation of heat energy occurs in a sequential manner starting from the molecule nearest to the heat source. The microscopic phenomenon happens in the form of lattice vibrations that are responsible for the transfer of heat energy via conduction.
Example, while heating of a pan the base heats up at first being continuously exposed to heat whereas the handle of the pan being far away from the source heats up after a long time.
What is the form of lipids, protein and carbohydrate that can be absorbed through small intestine?
Hello what is this? I need help quick pleasee
Which process results in the formation of two identical daughter cells
Explanation: During mitosis, a eukaryotic cell undergoes a carefully coordinated nuclear division that results in the formation of two genetically identical daughter cells. ... If all conditions are ideal, the cell is now ready to move into the first phase of mitosis.
Answer:
answer is D
answer is mitosis
Explanation:
hope this helps!
The photograph shows soil layers. What is the bottom layer of soil?
Answer:
bed rock
Explanation:
ok ok ok ok ok ok ok ok ok ok ok
What type of graph can show positive correlation, negative correlation, or no
correlation?
Answer:
A scatter plot shows all of those
Explanation:
what is the main purpose of the pupil
Answer:
to adjust how much light is let into the eye
Explanation:
Answer:
The pupil is where light enters the eye. How much light is controlled by the iris which surrounds the pupil and opens and closes it like a camera lens aperture.
True during development the skeleton of a fetus is made of cartilage which is converted to bone before birth
Answer:
Early in gestation, a fetus has a cartilaginous skeleton that becomes bone in ... At birth, a newborn baby has over 300 bones, while on average an adult human has 206 bones ... It is composed of fibers and granular cells in a matrix. ... The hypertrophic chondrocytes (before apoptosis) secrete vascular endothelial cell growth ...
Explanation
n:When does the fetal cartilage turn to bone?
Key milestones in fetal bone development
Weeks pregnant Milestone
7 weeks Bone outlines for entire skeleton established; cartilage is forming
8 weeks Somites disappear; joints start forming
10 weeks Bone tissue forms and starts hardening (ossification)
16 weeks Your baby can move his limbs
What two different components of a telescope can be used to focus light?
Answer:
Mirror and Lens
Explanation:
Refracting telescopes use lenses to focus the light, and reflecting telescopes use mirrors
Which factors improve soil fertility? Select the three correct answers.
A. Nitrogen
B. Humus
C. Manure
D. Horizons
E. Bedrock
Organism Clue
body
cell
1
a gamete of a housefly has 6
chromosomes
Haploid or Diploid
Answer:
Diploid
Explanation:
wrong question actually...
Is it necessary to sustain Earth's resources?why?
Answer:
earth is the only planet we know of that sustain life please mark me brain list
A researcher wanted to create a loss of function mutation for studying Type I Diabetes in a model animal. What mutation would mimic Type I diabetes?
a) Inhibition of sugar absorption in the small intestine
b) Inhibition of pancreatic beta-cells
c) Up regulation of insulin receptors on the pancreas
d) Down regulation of GLUT4 transporters in muscles
Answer:
The correct answer is: b) Inhibition of pancreatic beta-cells.
Explanation:
Type 1 Diabetes is a form of Diabetes Mellitus, a condition characterized by chronic hyperglycemia (high blood sugar levels) that can compromise many organs and even cause death if not treated properly.
The most common form of Diabetes Mellitus is Type 2 Diabetes, in which the pancreas produces insulin but cannot reach the target organs because of a pathologic state called Insulin Resistance.
Type 1 Diabetes, instead, is present in patients that cannot produce insulin on their own. Insulin is the most important hormone in the regulation of blood sugar - it is secreted by the pancreatic beta-cells when glycemia rises (which is normal after eating) and it is key in allowing glucose to reach the tissues where it's needed for energy requirements. Type 1 Diabetes is usually diagnosed in young, even pediatric, patients - the pancreatic beta-cells in these individuals are destroyed and unable to function (the reason for this is not clear in all cases), so they have to be administered with exogenous insulin to survive.
For the model animal to better represent Type 1 Diabetes, the mutation would have to inhibit pancreatic beta-cells.
One of your classmates submits the post below which is a very informative post about criteria for safe food production during the manufacturing process. What is missing from this post? "I recently read that industrial food processing factories are required to undergo periodic inspections by the United States Department of Agriculture as well as by the Food and Drug Administration. For the USDA, these inspections are conducted by staff in the Food Safety and Inspection Service, or FSIS."A. Did not refer to the source of the information in the body of the postB. Did not state what s/he specifically learned from the sourceC. Did not provide a citation for the source of the information
Answer:
A. Did not refer to the source of the information in the body of the post
Explanation:
In the post written by his friend, we can see that he decided to write information about the periodic inspections carried out by the United States Department of Agriculture as well as by the Food and Drug Administration, because he read about these inspections somewhere. However, he forgot to show this place where he read this information, that is, he forgot to present the source where he got the information presented in the post. By presenting the source, it would make the post more trustworthy and relevant.
An environmental microbiologist collects a water sample that contains bacteria that have not contacted the outside world for thousands of years. He uses sterile technique while transporting then back to the lab for testing. To his surprise, they are resistant to ampicillin. Based on your knowledge of bacterial evolution, which of the following statements provides the most reasonable explanation for this discovery?
a. The bacteria are a result of contamination on the way to the lab.
b. The bacteria do not contain 50S ribosomal subunits.
c. Vancomycin is a naturally occurring mineral occuring in the cave water.
d. The bacteria randomly acquired a mutation in their cell wall building machinery.
Answer:
The answer is "Option d".
Explanation:
These genetic mutations in heritage in the genome of the bacterium were referred to as biofilm formation. All those other changes are attributable to some genetic changes during replication. The short term of bacteria and vast quantities of the colony can develop rapidly.
The type of environmental choice then transfers into another generation. Some translations benefit human people and enhance their fitness.
The most logical cause for this finding is Option "D", and although types of bacteria have not been in contact with the outside world for hundreds of years, certain random changes resist penicillin.
Which of the following is not a main characteristic of a mineral?
A. Man-made
B. Solid
C. Predictable chemical composition
D. Inorganic
how does fertilization of angiosperm differ from fertilization in bryophytes
Answer:
Fertilization in flowering plants happens through a process called pollination. Pollination occurs when pollen grains from the anther land on a stigma. ... Fertilization occurs when one of the sperm cells fuses with the egg inside of an ovule. After fertilization occurs, each ovule develops into a seed
What is the kind of asexual reproduction
Watershed drains waters into a stream and tributaries. Which is its main function?
A. Production of continuous water supply that maintains life forms
B. Prevents growth of new plant species
C. Contributes to soil formation
D. Creates new minerals
Answer:
B. Prevents growth of new plant species.
Answer:
B. Prevents growth of new plant species
State three different information about zygote.
Answer:
A zygote is the union of the sperm cell and the egg cell . Also known as a fertilized ovum, the zygote begins as a single cell but divides rapidly in the days following fertilization. After this two-week period of cell division, the zygote eventually becomes an embryo.
Explanation:
why do many RNA viruses commonly demostrate antigen drift?
Answer:
:D
Explanation:
There is an estimated 10-100 trillion bacteria and other microorganisms living in the human digestive system, forming a mutualistic relationship in which all species benefit. Recently, much research has been done on the role of these microorganisms in the development of disease, the brain, and behavior.
Drag the terms on the left to the appropriate blanks on the right to complete the sentences. Not all terms will be used.
The________ is a layer of cells lining the blood vessels within the brain, acting as a filter that controls the molecules that pass between the blood and the brain.
An organism's ________ is the collection of all the microorganisms (e.g. bacteria, phages, fungi) that live inside the digestive system of that individual.
A_______is a type of intercellular protein connection between animal cells that prevents leakage of materials through the space between the cells.
The transmembrane protein ________ is one of the component proteins of a tight junction.
________lack all microorganisms in their digestive systems, a state achieved by delivering them through cesarean section and raising them in sterile incubators.
_______ are raised under sterile conditions to limit their exposure disease-causing microorganisms.
tight junction
gut microbiota gap junction
germ-free mice pathogen-free mice
blood brain barrier adhesion plaque
occludin
Answer:
- The blood brain barrier is a layer of cells lining the blood vessels within the brain, acting as a filter that controls the molecules that pass between the blood and the brain.
- An organism's gut microbiota is the collection of all the microorganisms (e.g. bacteria, phages, fungi) that live inside the digestive system of that individual.
- A gap junction is a type of intercellular protein connection between animal cells that prevents leakage of materials through the space between the cells.
- The transmembrane protein occludin is one of the component proteins of a tight junction.
- Germ-free mice lack all microorganisms in their digestive systems, a state achieved by delivering them through cesarean section and raising them in sterile incubators.
- Pathogen-free mice are raised under sterile conditions to limit their exposure disease-causing microorganisms.
Explanation:
The blood-brain barrier is a layer of cells made up of endothelial cells that act to limit the passage of substances from the bloodstream in a more selective manner than endothelial cells of capillaries located in other parts of the body. Gut microbiota can be defined as all the microorganisms (i.e., bacteria) inhabiting the mammalian gastrointestinal tract, which helps to ferment non-digestible substrates (e.g., dietary fibers). A gap junction is a class of cell junction that is formed between cells contacting each other which allows small molecules (e.g., water, ions, metabolites, microRNA sequences, etc) to pass through this intercellular communication. In vertebrate animals, cell junctions can be divided into 1-gap junctions (communication between cells), 2-tight junctions (occludin junctions), and 3-adherens junctions, hemidesmosomes and desmosomes (anchor junctions). Tight Junctions are composed of multiple proteins including transmembrane proteins such as occludin, tricellulin, junctional adhesion molecule (JAM), and one member of the claudin protein family. Germfree animals are research animals that have no microorganisms living in or on them, which are housed in controlled/isolated conditions to prevent any type of contamination. Finally, pathogen-free animals are research animals that are guaranteed to be free of particular pathogenic (harmful) microorganisms.
Which of the following is true about evaluating an experiment?
A)Evaluating an experiment allows the investigator to find errors and make improvements.
B)Evaluating an experiment is not important or required.
C)Evaluating an experiment can change the prediction.
D)Evaluating an experiment can make it more confusing.
Answer:
The correct answer is - A) Evaluating an experiment allows the investigator to find errors and make improvements.
Explanation:
Evaluation is the process in any experiment that helps in improving the analysis and remove missing components and errors to get better results. It also checks if all the process is included and running properly without error.
One should constantly be evaluating his or her experiment. It includes assessing how the experiment is going as you carry it out, what could have been improved if it was to be carried out again and how can eliminate any erros.
Andrew is trying to identify an unknown element. The element is dull and
brittle, and it is a poor thermal and electrical conductor. Where on the periodic
table is this element most likely found?
Answer:
non metals
Explanation:
2. Is caffeine really a source of energy
Answer
Yes i believe so
Explanation:
Q.#23.Lymph nodes are soft, small, round- or bean-shaped structures. They usually cannot be seen
or easily felt. They are located in clusters in various parts of the body, such as the: Neck, Armpit, Groin
and Inside the center of the chest and abdomen. At times these areas used to be swollen up for few days and are
gone. Explain why these swollen experiences are important.
Answer:
Lymph nodes swell to protect us from illness if they do not swell non fatal illnesses could spell out death
Explanation:
Why can even low levels of a toxin have serious effects, if the toxin doesn't break down easily, like mercury?
Answer:
below
Explanation:
also depends on the immune system some people it'll effect greater due to a weaker immune system
