Answer:
Meiosis is a process where a single cell divides twice to produce four cells containing half the original amount of genetic information. During meiosis one cell divides twice to form four daughter cells.
This is because meiosis creates cells that are destined to become gametes (or reproductive cells), this reduction in chromosome number is critical — without it, the union of two gametes during fertilization would result in offspring with twice the normal number of chromosomes to make a human child.
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Answer: A
Explanation:
Ecological succession is the process of change in the species structure of an ecological community over time. The time scale can be decades (for example, after a wildfire), or even millions of years after a mass extinction.
What happens at the edge of plates?
Answer:
Most earthquakes occur along the edge of the oceanic and continental plates.
Explanation:
pls mark brainliest
what is another name for cell members
Answer:
Explanation:
Another Name for the cell membrane is Plasma Membrane
Which of the following are characteristics of life? (Choose all that apply)
1)responds to stimuli
2)regulates internal processes
3)grows and develops
3)provides energy
Answer:
All of them are characteristics of life.
The following are the characteristics of life:
1) responds to stimuli.
2) regulates internal processes.
3) grows and develops.
4) provides energy.
What do you mean by life?Life is the character of organisms that distinguish them from other physical matters. The organisms with life can perform all biological processes.
The main characteristics that make them distinguish are they can respond to any stimuli and can grow and reproduce and transfer energy and regulate internal processes. The living creatures are plants, animals, algae, protists, and fungi.
Thus, the correct options regarding life are:
1) responds to stimuli.
2) regulates internal processes.
3) grows and develops.
4) provides energy.
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A genetic engineer wants to join the following DNA fragments.
Which tool should the engineer use?
O reverse transcriptase
O DNA ligase
O gel electrophoresis
O restriction endonuclease
Answer:
To join the DNA fragments the genetic engineer must use DNA ligase.
Which best explains why the moon has phases?
Group of answer choices
The moon's position changes in relation to the sun and Earth
The sun's position changes in relation to the moon and earth
The earth casts a shadow on the moon as it rotates
The moon rotates along its axis
Answer:
The moon's position changes in relation to the sun and earth
Answer:
the first one
Explanation:
the earth moves around the sun and the moon moves around the earth so when the moon goes behind the earth the sun cannot shine on it
Think back to our natural selection lab with the arctic foxes. What happened that
caused changes in trait distribution in our population of foxes?
A the selection events killed off all of the foxes with beneficial traits
B the foxes randomly survived and mated regardless of their traits
C there was no variation in the fox population
D differences in survival and reproduction of individuals depending on their traits
Answer:
D, I don't know what happened in your natural selection lab though so it might be wrong.
Most sex-linked genes are located on:
a) the autosomes
b) the X chromosome only
c) the y chromosome only
d) both the X chromosome and the Y chromosome
Answer:
B) The X chromosomes only
Use a sequence of at least four events to describe some of the ways
that water moves into, through, and then out of the atmosphere.
Please help
Explanation:
together evaporation transpiration sublimation plus volcanally emissions for almost all the water evaporate in the atmosphere that isn't inserted in human activities
Receptors are needed for which type(s) of cell signaling?
Answer:
Cell-surface receptors are involved in most of the signaling in multicellular organisms. There are three general categories of cell-surface receptors: ion channel-linked receptors, G-protein-linked receptors, and enzyme-linked receptors.
Cells contain proteins known as receptors, which bind to signaling molecules and cause a physiological response. Different receptors recognize different molecules.
What are receptors?Receptors are proteins, typically cell surface receptors, that bind to ligands and cause immune system responses.
Cells contain proteins known as receptors, which bind to signaling molecules and cause a physiological response. Different receptors recognize different molecules.
Insulin receptors bind insulin, dopamine receptors bind dopamine, nerve growth factor receptors bind nerve growth factor, and so on.
Thus, due to this, receptors are needed for cell signaling.
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During Earth's early history, microbial life on land contributed to the formation of soil. Soil formation, in turn, led to the evolution of land plants. Which term describes this chain of events?
Answer:
The correct answer is - nitrogen fixation.
Explanation:
In soil formation microbes play an important role as they help in providing important compounds such as nitrogen by the process of nitrogen fixation that is used by the plants.
Nitrogen-fixing organisms mostly bacteria are free-living but some live in a symbiotic relationship with plants such as Azobacter or with other organisms such as Rhizobium.
Explain how the Zika virus spreads
Answer:
The Zika virus is transmitted to people mainly by the bite of an infected Aedes species mosquito (Ae. Aegypti and Ae. Albopictus). These mosquitoes are the same mosquitoes that spread dengue and chikungunya viruses.
Explanation:
I hope this answer has helped you
Answer:
Zika virus is transmitted to people primarily through the bite of an infected Aedes species mosquito (Ae. aegypti and Ae. albopictus). These are the same mosquitoes that spread dengue and chikungunya viruses.
Explanation:
Can i have brainliest plsdoes variation allow for natural selection to take place?
Answer: HOPE THIS HELPS!
Variation allows some individuals within a population to adapt to the changing environment. Because natural selection acts directly only on phenotypes, more genetic variation within a population usually enables more phenotypic variation.
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Which of the following is true about the role of genetic and environmental factors in human health?
A) Genes are the only factor affecting whether or not an idividual will contract a disease.
B) Genetic factors are more important than environmental factors in determining an individual's
personal health risks.
C) Individuals can influence their health by controlling their genetic traits.
D) Environmental factors determine whether or not all genetic traits lead to health issues.
E) Certain environments can lead to an increased risk of developing certain diseases.
Answer: E) Certain environments can lead to an increased risk of developing certain diseases.
Explanation: This is the most logical answer since environmental factors, such as pollution, can increase one's risk of developing certain diseases.
A. is incorrect because genetic factors are not the only things that affect individual health. One's environment also factors in. If one lives a healthy lifestyle, they can help prevent themselves from developing disease that are more "encouraged" by their genes. An example would be a genetic trait that increases one's risk for heart disease. One can work to avoid heart disease by utilizing a healthier lifestyle.
B. is wrong because environmental factors play an equal role in determining if one will develop some genetically linked diseases.
C. is incorrect because as it stands, one cannot control their genetic traits.
D. is incorrect because some diseases, such as cystic fibrosis and sickle cell anemia are genetically inherited diseases which cannot be prevented by environmental factors. This is not to say that environmental factors are independent of all genetically linked diseases, but not all diseases can be prevented by environmental factors.
In 2006, an Ethiopian researcher announced the discovery of well-preserved 3.3 million-year-old fossil of a young female hominid. Refer to Figure (F) below. Considering the Hominid trend of evolution, choose which skull would most likely be that most primitive of the three.
Answer:
Skull three
Explanation:
the backlining is in more, and the jaw moves out more, resembeling that of a more gorilla like creature
It sounds like the description is referring to a hominid with a more pronounced facial structure, similar to that of a gorilla. This may indicate a more primitive stage of hominid evolution, as earlier hominids had more pronounced facial features and a more protruding jaw than later, more advanced hominids.
What is the basic evolutionary changes in the group mentioned ?As hominids evolved over time, their facial features became more refined, and their jaw became less protruding as they adapted to a diet that relied less on tough, fibrous vegetation and more on softer, cooked foods. This adaptation allowed for the development of a larger braincase and a more upright posture, both of which are hallmarks of later hominids such as Homo erectus and Homo sapiens.
It's worth noting that the evolution of hominids is a complex and ongoing area of research, and new discoveries and interpretations of existing evidence may change our understanding of the evolutionary timeline and the characteristics of different hominid species.
Over the course of hominid evolution, several important changes occurred that distinguish hominids from other primates. One of the earliest changes was the development of bipedalism, or the ability to walk on two legs. Bipedalism allowed hominids to free their hands for tool use and other tasks, and also facilitated the long-distance travel needed to explore new environments.
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How efficient are the normal commercial solar cells?
Answer the prelab questions below with reference to the attached class slides.
1. What is a mutation? (A. change of DNA / B. copy of DNA / C. passing of DNA / D. all listed)
2. Describe the info flow of transcription. (A. DNA --> DNA/B. DNA --> RNA / C. RNA --> protein / D.
DNA --> protein)
3. Describe the info flow of translation. (A. DNA --> DNA/B. DNA -> RNA / C. RNA --> protein / D. DNA-
-> protein)
4. Describe the info flow of expression. (A. DNA --> DNA/B. DNA --> RNA / C. RNA --> protein / D. DNA
--> protein)
5. Describe the info flow of replication. (A. DNA --> DNA/B. DNA -> RNA / C. RNA --> protein / D. DNA-
-> protein)
Answer:
1 . mutation is in a change in a DNA sequence nutrition can visit of DNA copying mistake made during cell division exposure to radiation exposure to Chemicals called motor Jeans Aur infection by viruses
___involves a break with past experiences and the learning of new values and norms.
A. Institutionalization
C. both a and b
B. Resocialization d neither a nor b
D. Neither a nor b
Please select the best answer from the choices provided
Answer:
B. RESOCIALIZATION
Explanation:
Answer:
__ involves a break with past experiences and the learning of new values and norms.
a. Institutionalization
b. Resocialization
c. both a and b
d. neither a nor b
Lions live in the south Sahara Desert in breeding groups called prides. Females tend to stay in their pride, but males may leave to join another pride. Which mechanism does this describe?
The correct answer to this open question is the following.
Although there are no options attached we can say the following.
This mechanism describes the necessity of males to lead and form their own pride to show their dominance and power. That is why young lions leave and wander, and when they are ready, they fight for their right to lead their own pride.
So yes, Females tend to stay in their pride, but males may leave to join another pride. And that is the male instinct for lions in the wildlife.
On the other hand, males tend to stay in the same pride, taking care of their cubs, raising them, and hunting. That is what they do best, hunt animals to feed the pride and the cubs.
What type of volcano is commonly found in the Pacific Ring of Fire?
a. Stratovolcano
b. Cinder Volcano
c. Scoria cone
d. Shield volcano
Answer:
d. Shield volcano
Explanation:
The type of volcano that is commonly found in the Pacific Ring of Fire is Stratovolcano.Therefore, the correct option is A.
What is the Pacific ring of Fire?The Pacific Ring of Fire is a region around the Pacific Ocean characterized by frequent earthquake and volcanic activity. Stratovolcanoes, also known as composite volcanoes, are steep-sided, cone-shaped volcanoes built up by the accumulation of layers of ash, lava, and other volcanic material.
They are known for their explosive eruptions and can be found along many of the tectonic plate boundaries in the Pacific Ring of Fire, including the Andes, Cascade Range, and Japan. Other types of volcanoes, such as shield volcanoes and cinder cones, are also found in the region, but stratovolcanoes are the most common.Therefore, the correct option is A.
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(1 point) Blood type AB is the universal donor that can donate blood to every other blood type.
True or False?
Answer:
Group AB can donate to other AB's but can receive from all others. Group B can donate red blood cells to B's and AB's.
Explanation:
Which of the following best explains why the Sun appears to move across the sky every day?
Group of answer choices
The Sun rotates on its axis
Earth rotates on its axis
The sun orbits around Earth
Earth orbits around the Sun
What is the cause of a brainfart?
Answer:
Overthinking it.
Explanation:
Just go with with what you gut is telling you
If someone has a heavy weight on his or her chest, explain why after a short time it becomes difficult to breathe, even though the person’s mouth and nose are not affected
Answer:
When you breathe, air flows from your nose or mouth to your lungs, the lungs expand to allow the air in, and then they contract to remove the air from your body, then you exhale that air.
Then you can see that in the breathing process, your lungs need to expand. If you have a heavy weight on your chest, then the amount that your lungs can expand is really small, then the amount of air that they can have is smaller than normal. This is why is harder to breathe when you have a heavy weight on your chest.
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Most of the border of the state of Florida is where the land meets the ocean. What term is used for this?
Answer: Coast? Or peninsula
Explanation:
Which of the following correctly indicates the order in which these events occur?
Answer:
The third one
Explanation:
Because its right
The Earth ________ is a group of parts that include air, water, land, and life
Answer:
The Earth Cycle
Answer:
biosphere
Explanation:
The biosphere conists of all living things and it includes air , water , land and life.
Efforts to reduce pollution began occurring later in the century. If pollution near factories was reduced, what would happen to the color of the moths? Explain your answer.This would happen because
Answer:
moths would begin becoming lighter as the pollution is reduced
Explanation:
The color of the moths would begin becoming lighter as the pollution is reduced. This is because during the time of high amounts of pollution industrial melanism takes place and the moth's pigmentation becomes a darker tone. This is so that the moths are able to blend in better with its surroundings and survive. Pollution causes sulphur dioxide gas and dark soot deposits which have a greyish dark tone, thats why moths pigmentation turns darker. With pollution reduced moths need a lighter colored pigment to blend into lighter colored objects such as trees and leaves.
The color of the Moths will become lighter as a result of this due to the effect
pollution has on its color.
Industries and factories make use of fuel and when it is burned in generating
sets and other equipment it produces the compound known as Nitrogen
oxide.
The Nitrogen oxide has a brownish color which goes into the atmosphere
where the moths fly in thereby contact with the gas darkens the color to
shades of brown. A reduction in the discharge of the gas will lead to it
becoming lighter.
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Which method of plant propagation allows a plant breeder to create an exact clone of a plant?
A sexual propagation
B. asexual propagation
O C seeds
D budding