Quiz
Which of the following statements best describe why cardiac muscle tissue in the heart is considered a
tissue?
Choose 2 answers:
Cardiac muscle tissue is found throughout the body, carrying out a wide variety of functions
for the organism.
Cardiac muscle tissue is made up of muscle cells, which are a type of specialized cell.
The cells in cardiac muscle tissue work together to help the heart muscle contract.
Report a problem
Answer:
The cells in cardiac muscle tissue work together to help the heart muscle contract.
Explanation:
The statement best describes why cardiac muscle tissue in the heart is considered a tissue are:
B. Cardiac muscle tissue is made up of muscle cells, which are a type of specialized cell.
C. The cells in cardiac muscle tissue work together to help the heart muscle contract.
What are cardiac muscles?Cardiac muscles are the muscles that are only found in the heart of the body. These muscles include fibroblasts, cardiomyocytes, and smooth muscle cells. These muscles are tubular and of red color.
Cardiac muscle tissue is one of the three types of tissues found in the body. These tissues help in the contraction and relaxation of the heart and help in the pumping of blood in the body.
Thus, the correct options are B and C.
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When the concentration of molecules on both sides of a membrane is the same, the molecules will
A move across the membrane to the inside of the cell
B stop moving across the membrane
C move across the membrane is both directions
D move across the membrane to the outside of the cell
Answer:
B. Stop moving across the membrane.
Explanation:
Movement of molecules across the cell membrane depends on the concentration of the molecules on both sides of the membrane i.e the higher the concentration of molecules,the higher the attraction,since the molecules have the same concentration on both sides of the membrane the molecules does not move to either of the sides.
Forming lons and lonic Bonds
2. When an atom takes on electrons, it will have which of the following?
O a negative overall charge
no charge
a positive overall charge
a neutral charge
Answer:
a negative charge overall
Explanation:
when an atom loses electrons, because the protons are more than the electrons now, the atom becomes positive
when an atom gains electrons, because the number of electrons is more than the protons, the atom has a negative charge
why we need to study biology
Answer:
you learn to make more informed decisions about their own health and about significant biological issues such as genetically modified crops, the use of antibiotics, and the eradication of invasive species
If we study biology, we can understand how plants and organisms interact with each other, what are their traits, evolutionary ancestors, etc. Not to mention, it helps us be safe from dangerous animals, and allows us to understand how to prevent bacteria and viruses from entering our body.......
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Q.1. Describe and explain what can be seen by using the Parkes Radio Telescope, affectionately known as “The Dish.” Be sure to explain what synchrotron radiation is.
Q.2. Why is the Murchison Radio Observatory such an ideal place to build radio telescopes? Explain.
Q.3. When Walker decides that she wants to explore beyond the Milky Way, what does she find?
Q.4. How many radio galaxies can be seen in the image that Walker shares? Describe these galaxies and what they look like in the image?
Q.5. After learning about Walker and her love of and exploration of galaxies, what questions do you still have? What do you want to know more about?
Answer:
1. The Parkes radio telescope is a gigantic measuring instrument, used to examine a wide range of radio energies from our galaxy and other parts of the universe.
2. The remote location of the MRO ensures a radio quiet operating environment but makes access to basic infrastructure like roads and power a challenge.
3. whistling plasma ducts in the Earth's ionosphere and some of the youngest and weirdest radio galaxies ever found.
4. only around 800 giants have been found.
5.
Explanation:
sorry it took long to answer
please make this the
What is the function of the crop?
Answer:
sanaol
Explanation:
paningkamot aysig binugo
Answer:A crop (sometimes also called a croup or a craw, or ingluvies) is a thin-walled expanded portion of the alimentary tract used for the storage of food prior to digestion. This anatomical structure is found in a wide variety of animals.
Learning Task 5: In your notebook, transform the text below into a non-textual
information source.
Sharks and whales are a classic example of two different animals revealing
similar traits in the same environment. One of the similarities of these two
marine animals is their habitat. They both live in the vast range of depth in
their environment. They also have the same fin structure. They only have a
single tail for propulsion and because they are both large aquatic animals,
they both consume large volume of food, however, sharks hunt for their
food. Whales do not have this hunting tendency. Another difference of
sharks to whales is their class. Whales are mammals while sharks are fish
but they both live in the ocean. Also, whales have bones while sharks only
have cartilages.
Answer: The similarities between shark and whales are indicative of convergent evolution.
Explanation:
Convergent evolution can be defined as the process in which the organisms are not closely related but they evolve similar traits as a result of living in a similar kind of environment or adapting traits which enable them to perform the same ecological niches.
The similarities between shark and whale is indicative of convergent evolution as the animals are not related to each other phylogenetically but they live in the same environment this they evolve same kind of traits.
The similarities between sharks and whales represent an example of convergent evolution.
Convergent evolution refers to the evolution of similar phenotypic traits in unrelated and/or distantly related species.Convergent evolution creates analogies, i.e., different structures that may have the same function but were not present in the last common ancestor of both species. On the other hand, divergent evolution refers to the development of dissimilar phenotypic traits in closely related species as a result of evolution by natural selection, thereby leading to speciation.In convergent evolution, similar phenotypic features (traits) have evolved independently and repeatedly in each lineage in order to adapt to particular environmental conditions.In conclusion, sharks and whales are an example of convergent evolution because they are distantly related species that exhibit similar phenotypic features in the same environment.
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Raj takes a meteorology class and learns about the effects of air density on the weather. What affects the density of air? Explain.
Answer:
Temperature, pressure, and moisture/humidity are all factors to consider.
Warm air has a lower density and rises/becomes buoyant.
The air is less dense at higher elevations above sea level. To bring the same amount of oxygen into the lungs when running at high altitudes, you'll need to take more deep breaths.
Humidity is less dense at higher temperatures and pressures. The weight of water molecules is less than that of nitrogen and oxygen molecules. To get more moisture into the same volume of air, some of the heavier nitrogen and oxygen must be displaced.
Explanation:
name and define the states of energy
Answer:
There are two states of energy: potential energy and kinetic energy.
Potential energy is stored energy – energy that is ready to go. Potential energy can be used in combination with other terms like “gravitational potential energy,” which is the energy an object has due to height in comparison to a lower elevation.
Kinetic energy, simply put, is energy something has because of its motion.
Explanation:
Can someone help me real fast?!
One difference between the chromosomes of prokaryotes and those of
eukaryotes is that:
O A. only prokaryotic chromosomes contain proteins.
B. chromosomes are in a nucleus in eukaryotic cells.
C. only eukaryotic chromosomes consist mainly of DNA.
D. chromosomes in prokaryotic cells occur in pairs.
Answer:
One difference between the chromosomes of prokaryotes and those of
eukaryotes is that: chromosomes are in a nucleus in eukaryotic cells.
One difference between the chromosomes of prokaryotes and those of eukaryotes is that the chromosomes are in a nucleus in eukaryotic cells. Thus, the correct option is B.
What is eukaryotic cell?Eukaryotic cells are the organisms whose cells contain a well-defined nucleus and other membrane-bound organelles such as chloroplast and mitochondria. There is a wide range of eukaryotic organisms including animals, plants, fungi, and protists, as well as most of the algae. Eukaryotic organisms may be either single-celled or multicellular.
Eukaryotic chromosomes are located within the nucleus of the cell, whereas the prokaryotic chromosomes are located in the nucleoid. This is the key difference between a prokaryotic and a eukaryotic cell. The eukaryotic cells have a membrane-bound nucleus whereas a prokaryotic cell lacks a well-defined nucleus.
Therefore, the correct option is B.
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What types of energy are involved in a chemical reaction?
Activation, chemical, released energy:: is the energy required for a chemical reaction to take place, and
Absorbed, Chemical, Released energy:: is the energy associated with every substance.
Answer:
Energy Changes in Chemical Reactions
Chemical reactions often involve changes in energy due to the breaking and formation of bonds.
Reactions in which energy is released are exothermic reactions, while those that take in heat energy are endothermic.Answer:
I think its activation energy and chemical energy
Explanation:
Dian Fossey had no experience with primates or even how to conduct field studies and had never lived outside of America. Why was she able to be so successful at her research?
Answer:
bc of her knowledge of various species,
After a power stroke, the myosin head must detach from actin before another power stroke can occur. What causes cross bridge detachment?.
A new molecule of ATP attaches to the myosin head, causing the cross-bridge to detach is the right answer.
What is cross bridge detachment?During detachment cycle, the cross-bridge head is thought to undergo a rotation and so pull the actin filament relative to the myosin so we can conclude that a new molecule of ATP attaches to the myosin head, causing the cross-bridge to detach.
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Describe how the writers of ""Into the Air"" and ""The Wright Brothers"" show that Orville and Wilbur worked together to overcome obstacles. Cite evidence from both texts to support your answer
Answer:
creating the first plane introducing a new mode of transportation to mankind and changed the way aerodynamics works
Explanation:
an agent sell some articles for Rs 5500 what Commi
ssion does he get at 5%
Answer:
Rs.275
Explanation:
Rs.5500 ÷ 100 × 5 = Rs.275
Plants in the ______ are succulent because they need to hold as store a lot of moisture
Answer:
Plants in the desert are succulent because they need to hold as store a lot of moisture
On a hike in the mountains, you find a stream with a rocky bottom. Many of the rocks are covered in algae. Which type of mollusc is most likely to be found living in this environment
Snails and slugs are the type of molluscs most likely to be found living in the algae-covered rocks.
What are molluscs?Molluscs are invertebrates with hard external shells and soft internal bodies.
Molluscs being invertebrates do not have backbones.
Molluscs include snails and slugs which feed on plant matter and algae.
Therefore, the type of mollusc most likely to be found living in the algae-covered rocks are snails and slugs.
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What molecules are you exhaling this very minute?
Answer:
carbon dioxide
Explanation:
The less energy available to a population, the ___ the population will be.
Please help
Answer:
c
Explanation:
with no energy it could all fall apart
Which most directly controls the rate at which food is broken down to release energy?
A. enzymes
B. hormones
C. nucleic acids
D. vitamins
Answer:
enzymes
Explanation:
What feature of double-stranded dna makes it necessary to have a leading strand and a lagging strand during replication?.
Answer:
there must be a pre-existing chain of nucleotides
Explanation:
So RNA primers are used for initiation of new DNA chains.
RNA primer is short piece of RNA, synthesised at the end of the new strand with the help of DNA specific RNA polymerase enzyme called primase and primers provide free -OH for DNA polymerase to start polymersing. leading template strand requires primer only ones. But lagging template strand requires many primers. Once primer is ready DNA Pol(III) will come & start adding deoxyribonucleotide to the -OH of primer by complementary basepairing. Two nucleotides link each other by phosphodiester bond. The daughter DNA for template is synthesised continuously, Therefore called leading strand. DNA polymeraseIII has Exonuclease activityIt can add nucleotides in the direction. Replication is discontinuous on the other template with polarity because only a short segment of DNA strand can be built in direction due to exposure of a small stretch of template at one time.
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What is 1550 dm expressed in hectometers?
Answer:
my dude its 1.55 hm
Explanation:
Answer:
1.55 hm
Explanation:
1.5 HM is 1550 DM expressed in hectometers
________________ is the direct laying of bone into the primitive connective tissue. The membrane that occupies the place of the future bone resembles connective tissue and forms the periosteum. It is composed of fibers and granular cells in a matrix. What is the name of this process that results in compact and spongy bone formation? A) mesenchymal ossification B) endochondral ossification C) perichondrium ossification D) intramembranous ossification
Answer:
The correct answer is - option D. intramembranous ossification
Explanation:
Conversion of mesenchymal tissue into bone directly is known as intramembranous ossification. The bone formation is the process that involves the conversion of mesenchyme or primitive connective tissue from laying of bone directly. It is made up of granular cells and fibers in the matrix.
It is the formation of tissue of bone in a fetal without any template or cartilage base during fetal development.
Thus, the correct answer is - option D. intramembranous ossification
Cell division (mitosis) is essential for life functions in complex organisms. Which of the following THREE processes does mitosis help with?
Organism Reproduction
Cellular Energy
Protein Production
Repair of Dead Cells
Response to Environment
Organism Growth
Cell Differentiation
Temperature Regulation
Answer:
Organism Growth, Repair of Dead Cells, and Cell Differentiation.
I hope this helps!
What pigment, only present in plants, makes photosynthesis possible?.
Answer:
Chlorophyll
Explanation:
Where are the heart and great vessels located in the human body?.
Answer:
From the center to the left of the thorax, the heart and major vessels are placed in the mediastinum between the lungs and above the diaphragm.
Explanation: Answer above
Which organelle contains the hereditary information (DNA) for the cell?
Golgi body
nucleus
mitochondrion
endoplasmic reticulum
Answer:
nucleus
Explanation:
Answer:
Nucleus
Explanation:
The nucleus is a membrane-enclosed organelle found in most eukaryotic cells. The nucleus is the largest organelle in the cell and contains most of the cell's genetic information (mitochondria also contain DNA, called mitochondrial DNA, but it makes up just a small percentage of the cell's overall DNA content).
The tendon that attaches the muscles of the calf to the calcaneous is the
A. I.T. Band
B. Patellar tendon
C. Achilles tendon
D. Deltoid ligament
Answer: Achilles’ tendon
Explanation:
The Achilles tendon is a tough band of fibrous tissue that connects the calf muscles to the heel bone (calcaneus). The Achilles tendon is also called the calcaneal tendon. The gastrocnemius and soleus muscles (calf muscles) unite into one band of tissue, which becomes the Achilles tendon at the low end of the calf.
Answer:
Achilles
Explanation:
Google is cool, I guess.
if a snake species were introduced to an ecosystem where it had no natural predators, what long-term effect do you predict the snakes would have on the population dynamics of the ecosystem?
They would breed with native snake species, resulting in an increase in biodiversity in the ecosystem.
They would serve as a food source for predators of native snakes, causing an increase in native snake populations.
They would form mutualistic relationships with native snakes, since they would occupy the same niche in the ecosystem.
They would compete with native snake species for resources, causing a decline in native snake populations and possibly extinction.
Answer:
D. They would compete with native snake species for resources, causing a decline in native snake populations and possibly extinction.
Explanation:
Just took the test! :D
They would compete with native snake species for resources, causing a decline in native snake populations and possibly extinction. Hence option D is correct.
What are predators?Predators are living things that go after and kill prey. Both carnivores and omnivores can be predators. Predation can be classified into four categories: carnivory, herbivory, parasitism, and mutualism. Depending on whether or not the victim dies, each sort of predation can be classified.
Predators include weasels, hawks, wolves, mountain lions, and grizzly bears. Because they are carnivores, predators only eat meat.
If a snake species were introduced to an ecosystem where it had no natural predators, it would compete with native snakes. Hence, option D is correct.
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How do scientist know that the core is made of iron and nickel
A=Scientists have gathered samples of the core
B=Pictures of the core have been taken from satelites
C=The core produces a lot of seismic waves
D=The core is dense and produces the magnetitteid. HELP ASAP WILL MARK BRAINLY
Answer:c
Explanation:Apex