Explanation:
Myxozoans (phylum Myxozoa) are metazoan parasites utilizing invertebrate and (mainly) aquatic vertebrate hosts. They have in common with cnidarians the possession of virtually identical, highly complex organelles, namely the polar capsules in myxozoan spores, serving for attachment to new hosts and the nematocysts in surface epithelia of cnidarians, serving for food capture. Although myxozoan spores are multicellular, the simple trophic body forms of almost all species, reduced to syncytial plasmodia or single cells, reveal no clues to myxozoan ancestry or phylogenetic relationships. The myxozoan genus Buddenbrockia is one of only two known genera belonging to a clade which diverged early in the evolution of the Myxozoa. Today the Myxozoa are represented by two classes, the Myxosporea, containing all the better-known genera, which alternate between fish and annelids, and the Malacosporea, containing Buddenbrockia and Tetracapsuloides, parasitising bryozoans. The latter genus also infects salmonid fish, causing proliferative kidney disease (PKD). The enigmatic Buddenbrockia has retained some of its ancestral features in a body wall of two cell layers and a worm-like shape, maintained by four longitudinally-running muscle blocks, similar to a gutless nematode and suggestive of a bilaterian ancestry. Although some analyses of 18S rDNA sequences tend towards a cnidarian (diploblast) affinity for myxozoans, the majority of these studies place them within, or sister to, the Bilateria. The latter view is supported by their possession of central class Hox genes, so far considered to be synapomorphic for Bilateria. The simple body form is, therefore, an extreme example of simplification due to parasitism. Various hypotheses for the occurrence of identical complex organelles (nematocysts and polar capsules) in diploblast and triploblast phyla are evaluated: common ancestry, convergent evolution, gene transfer and, especially, endosymbiosis. A theory of the evolution of their digenetic life cycles is proposed, with the invertebrate as primary host and secondary acquisition of the vertebrate host serving for asexual population increase.
21. A 300 N force acts on a 25 kg object. The acceleration of the object is
7500m/s
300 m/s
25m/s
12m/s
Answer:
[tex]\boxed {\boxed {\sf 12 \ m/s^2}}[/tex]
Explanation:
Force is the product of mass and acceleration.
[tex]F=ma[/tex]
The mass is 25 kilograms and the force is 300 Newtons, but we should convert the units to make the problem easier later.
1 Newton is equal to 1 kilogram meter per square second. The force of 300 N is equal to 300 kg*m/s²Substitute the known values in for the variables ( F and m).
[tex]300 \ kg*m/s^2= (25 \ kg) a[/tex]
Since we are solving for a, we must isolate the variable. a is being multiplied by 25 kilograms and the inverse of multiplication is division. Divide both sides by 25 kg.
[tex]\frac{ 300 \ kg*m/s^2}{25 \ kg}= \frac{(25 \ kg) a}{25 \ kg}[/tex]
[tex]\frac{ 300 \ kg*m/s^2}{25 \ kg}= a[/tex]
The kilograms will cancel out (hence our earlier unit conversion).
[tex]12 \ m/s^2=a[/tex]
The acceleration is 12 meters per square second.
Which of the following cannot be used to determine if two organisms share a common ancestor?
Group of answer choices
A. Fortune tellers
B. Homologous structures
C. Fossil records
D. Embryology
Answer:
fortune tellers
Explanation:
All the rest are scientific evidences of organic evolution
8. Write the process of water absorption by roots in plant
Answer: In higher plants, water is absorbed through root hairs from the soil water. The walls of root hairs are permeable to water and are hydrophilic in nature. They contain vacuoles filled with cell sap. Absorption of water by roots takes place by two mechanisms namely, active absorption and passive absorption. During active absorption, the root cells absorb water using metabolic energy released through respiration. Active absorption could be either osmotic absorption or non-osmotic absorption. In osmotic absorption, water is absorbed from the soil into the xylem of the roots in the osmotic gradient. In non-osmotic absorption, water is absorbed against the osmotic gradient. In passive absorption, water absorption is due to transpiration. In this, absorption of water into the root is due to conditions that originate in the top of the plant and the root cells play a passive role. Osmotic concentration of the root cells is due to the presence of soluble metabolic products synthesized in the aerial parts of the plants and later translocated downwards to the root cells.
Explanation:
what are the five types of templements
Answer:
Site templates.
Snippets.
Navigation templates.
App templates.
Form templates.
Explanation:
Ecological succession is the —
a.
process of change to an ecological community over time
b.
passing down of advantageous traits to offspring
c.
an organism's ability to survive an environmental change
d.
the creation of a new species within an ecosystem
Explain how physical and chemical properties influence the formation of ocean current and the distribution of marine life
False answers will be reported but if your answer is good I will give it brainliest.
Physical and chemical properties influence the formation of ocean current and the distribution of marine life through the different features present.
What is Marine life?This is referred to as the animals, plants and other organisms which live in salt water sea and oceans.
Physical and chemical factors such as oxygen levels and light availability promotes the presence of of plants and animals as they are able to undergo photosynthesis and also respire thereby ensuring their increased growth and reproduction.
High ocean current also reduces the amount of organisms present in the marine life due to them being washed away to other parts and hindering their survival.
Read more about Marine life here https://brainly.com/question/1772603
#SPJ1
what is this diagram called?
Explanation:
what part of biology are you studying?
Match
Solids
Liquids
Gases
Change of state of Matter
Particles are
tightly packed, but are
far enough apart to
slide over one
# another
Occurs due to heating or
cooling of a substance (adding or
removing energy)
have an
indefinite shape
and an indefinite
volume
Particles are
tightly packed, vibrating
about a fixed position
Answer: Solids- Particles are tightly packed, vibrating about a fixed position.
Liquids- Particles are tightly packed, but are far enough apart to slide over one another
Gases- have an indefinite shape and an indefinite volume
Change of state of Matter -Occurs due to heating or cooling of a substance (adding or removing energy)
Explanation: Hope it helps :)
what is the advantage of a double circulation?
someone awnser asap pls
Answer:
what hellpppp pleaseAnswer: It allows a greater flow of blood to the tissues. It helps in creating more pressure to pump blood around the whole body tissues and organs. A separation of oxygenated and deoxygenated blood is possible that leads to taking in oxygen-rich blood and removal of carbon dioxide from the blood through the lungs.
Explanation:I’m smart plz give brainlest
What effect does an increase in human population most likely have on the biodiversity of the plant species found in the rainforest?
A. As human population increases, the succession in the rainforest leads to increased biodiversity.
B. As human population increases, the diversity of larger rainforest plant species increases.
C. As human population increases, the number of individual rainforest plant species increases.
D. As human population increases, the diversity of all rainforest plant species decreases.
E. As human population increases, the diversity of all rainforest plant species increases.
Answer:
Answers is the as human population increase the diversity of all rainforest plants species decrease
Explanation:
The effect of an increase in human population most likely to have on the biodiversity of the plant species found in the rainforest will be as human population increases, the diversity of all rainforest plant species decreases. Thus, the correct option is D.
What is Biodiversity?Biodiversity is the term used to describe the enormous variety of life forms which are present on the Earth. Biodiversity can be used more specifically to refer to all of the species which are present in one region or an ecosystem. Biodiversity refers to every living thing, including the plants, bacteria, animals, and the human population living in a geographical location.
An increase in the human population most likely have an effect on the biodiversity of the plant species which are found in the rainforest is that as the human population increases, the diversity of all the rainforest plant species decreases.
Therefore, the correct option is D.
Learn more about Biodiversity here:
https://brainly.com/question/23101752
#SPJ6
2. Which of the statements below is incorrect about genes?
A. Genes are present inside a nucleus and they carry chromosomes in them
B. Each chromosome carries thousands of genes in them
C. Genes are segments of deoxyribonucleic acid or DNA
D. Genes code for specific proteins in our body
Can someone tell me if these are right
Explanation:
perfect!!!!!!!!!!!!!!!
1.
Are the corals on the Great Barrier Reef at high risk, moderate risk, or low risk of bleaching due to heat stress? Use the temperature data to explain your answer.
Answer:
Moderate risk.
Explanation:
Now, I would say between moderate and high but the bars are not all that high, but yes, the coral will be damaged by overbleaching caused by heat stress. The bars are above at minimum 21.77 degrees Celsius and a maximum of 31 degrees Celsius. Coming from a middle schooler, it sounds like a brainless answer. I hope you get it right
As per the given graph, the corals on Great Barrier Reef are at moderate risk of bleaching.
What is coral bleaching?When the water temperature rises too high, corals expel the algae (zooxanthellae) that live in their tissues, causing the coral to turn completely white.
This is known as coral bleaching. A coral that bleaches is not dead. Corals can survive a bleaching event, but they are stressed and may die as a result.
Bleached corals are more likely to have slower growth rates, lower reproductive capacity, increased disease susceptibility, and higher mortality rates.
When more vulnerable species are killed by bleaching events, the coral community composition can change.
When corals are exposed to high temperatures, they expel the microscopic algae that live within their tissues, revealing their white skeletons.
Although bleached corals are not dead, they are more vulnerable to starvation and disease.
Thus, as in the given graph, the temperature range is fluctuating but are higher than the threshold heat for corals, these are on moderate risk of bleaching.
For more details regarding coral bleaching, visit:
https://brainly.com/question/15014189
#SPJ2
FIRST CORRECT GETS BRAINLIEST AND 25 POINTS
_____________________: Would be considered a pure element because ___________________________________________________________________________________________________________________________________________________________.
_____________________: Would be considered a mixture of elements because ___________________________________________________________________________________________________________________________________________________________.
_____________________: Would be considered a mixture of compounds because ___________________________________________________________________________________________________________________________________________________________.
_____________________: Would be considered a mixture of only one type of compound because __________________________________________________________
_____________________________________________________________________________.
Answer:
E would be considered a pure element beacuse there's only one type of atom
B would be considered a mixture of elements because there is more than 3 elements
C would be considered a mixture of compounds because there is more than 2 compounds
A would be considered a mixture of only one type of compound because there are 2 different atoms joined together
Which of the following would occur without gravity?
Answer: humans would become weightless, we would be flying super fast across the earth; much like tumbleweeds.
Explanation:
because thats how gravity works.
Polypeptides fold into a
lipid
nucleic acid
protein
carbohydrate
Answer:
protein
I hope it is helpful to you
What are the pros and cons of dams used to control the flow of a river?
One of the benefits is that we can control where the water flows which allows us to make more structures around the world. However, when we make dams, the water cannot create natural levees and that is bad because natural levees are supposed to break so that it can spread soil from upriver, which protects the land around it. One example of this is the Mississippi river, which does not make natural levees that would protect the mouth of the river or the Gulf of Mexico. That means that the coast would be more subject to damage by hurricanes.
Hope this helps and have a nice day.
-R3TR0 Z3R0
Explanation:
pros : it can help generate electricity
water is keep safety if there was a drought
provides alternative ways for clean water
reliable
cons: can damage the animals habitat
can disrupt the views
expensive to build and maintain
may be unable to keep up with the government demands
Study the cross-section below and put the following in order from oldest to youngest using the law of of superposition,
(N
(z
Poop that is burned and used for energy is an example of...
a. Solar Power
b. Biomass
c. Wind Power
d. Hydro Power
Answer:
B. biomass
Explanation:
plz mark brainliest if correct.
the process of releasing material from inside the cell
You can be referring to exocytosis which removes waste from inside of the cell which requires ATP.
Question 6
1 pts
Geneticists have discovered many different gene mutations that have led to the
development of cancer. These mutations affect how often a cell reproduces. Which
process would be directly influenced by these mutations?
Answer:
Meotic cell division (mitosis)
Explain, using a named example, why many sex-linked diseases occur more frequently in men than women
Answer:
Because men have Y-chromosomes.
Explanation:
In women, the final chromosome is XX, but in men, it is XY. Because this Y gene is different, genetic disorders are typically linked to this chromosome. A mutation in the X chromosome is equally prevalent in the population, meaning that the Y chromosome makes a male more likely to have a disease because they are more likely to have a genetic disorder, due to having both an X and Y chromosome.
Which chromosomes undergo a deletion mutation, information is
1. repeated
2. lost
3. reversed
4. transferred
itz option b lost
hope it helpz^^
Identify the parts of the expression 5x2 +7
5x is a
5 is a(n)
7 is a(n)
x is a
Answer:
Identify the parts of the expression 5x2 + 7.
5x2 is a term
5 is a coefficient
7 is a constant
x is a factor
Explanation:
Got it right on Edgenu
Select the examples of genetically motified organisms (GMOs) SELECT ALL THAT APPLY
I. a Cotten crop harvested for fabric production
II. a soybean crop modified to possess herbicide resistance
III. a farm-raised pig engineered to digest food more efficiently
IV. a wild white-tailed deer hunted for meet
X. a wild sunflower harvested for seeds
Answer:
II. A soybean crop modified to posess herbicide resistance
III. A farm-raised pig engines to digest food more efficiently
Explanation:
The organisms listed have been modified
What are the 2 cells that use meiosis to replicate?
I need help ASAP , so I hope you answer this question.
Answer:
C
Explanation:
helpppppppppppppppppppppppppppppppppppppp
What conditions in an ancient environment would make it suitable to the formation of fossil fuels? A. Movement of surface water causing weathering of rock. B. Frequent volcanic eruptions and forest fires. c. Extremes in high and low temperatures during the day. D. Abundant plant life and rapid laying down of sediments.
Answer:
A
Explanation:
The study of the connection of the roles of different animal systems is called
The connection between different animal systems is a part of ecology study, in which every animal plays a different role to balance the ecosystem.
What is ecology?In the ecology study of the interaction between organisms and their abiotic environment, different animal systems play different roles.
In a particular ecosystem, every organism is dependent on others to maintain a balanced life which affects its surrounding environment.
An animal system is a group of animals in a particular habitat that describe a particular species interaction in which an organism interacts with its surrounding environment.
Therefore ecology is the study of connections between different animal systems.
Learn more about ecology, here:
https://brainly.com/question/13046612
#SPJ2