Biomolecues are essential to all living things. Which biomolecule is "B" from the above table?
Select all that apply.
Asexually, fungi can reproduce by _____.
fission
fragmentation
budding
producing spores
Which crops provide more than half of the calories consumed by humans?
6. Use the experiment below to answer the following questions.
Apple trees are a common type of tree in the northern forests of the United States. In studying one forest, a forester noticed that mature apple trees were abundant but there were very few young apple trees. She wondered why there were so few young trees. By reading the records that other foresters in that area had kept, she learned that the population of deer living in the forest had doubled in the last five years. By reading studies on forests that other scientists had performed, she also learned that deer in similar forests like to eat young apple trees and the young trees of other species.
a. Design a question the scientist could ask that relates to her observations and could be tested.
b. In the experiment, the forester wondered why the forest had many mature apple trees, but very few young trees. Which step of the scientific method does this represent?
c. Which step of the scientific method is “If deer are eating young apple trees, then keeping the deer away from the young apple trees will allow trees to grow.”
d. To test her hypothesis, the forester set up an experiment. She placed fencing around some of the young trees (keeping the deer away) and left other young trees exposed to the deer. Which is the control group?
e. What is the independent variable in the experiment, eaten young trees or the fencing? (Hint: DV depends on IV)
the evidence that indicates there was once tectonic activity on mercury, venus, and mars
Tectonic is the structure present in the crust of the planet. The tectonic activity was seen once before on planets like mercury, mars, and venus.
What is the tectonic activity?Tectonic activity is the structural component of Earth that controls the movement of the crust. Mercury had tectonic plates in its earlier period and as a result, formed cliffs known as scarps.
Earlier venus used to have large active volcanoes that covered the surface with solidified lava. They were similar to the volcanoes present on Earth.
The planet mars have the largest Tectonic features and volcanoes that are high and deep compared to the volcanoes present on Earth.
Therefore, the planets, mercury, venus, and mars once had tectonic plate movements.
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A/an ________ is a sudden and widespread outbreak of a disease within a population group or area
The fundamental cause of sickle-cell disease is a change in the structure of:
Name and describe 3 variations of spiral shaped bacteria.
A.
B.
C.
Three variations of spiral-shaped bacteria include vibrio, which are comma-shaped; spirillum, which have a rigid spiral shape; and spirochete, characterized by their tight, flexible spirals.
Bacteria can present a variety of shapes, and among these, spiral-shaped bacteria are particularly interesting due to their unique physical structures. We can identify three variations of spiral-shaped bacteria: vibrio, spirillum, and spirochete.
Vibrio
Vibrio bacteria are typically curved or comma-shaped rods. These bacteria are known for causing diseases like cholera in humans, which is attributed to Vibrio cholerae. They inhabit aquatic environments and can be recognized by their distinctively curved shape resembling a comma.
Spirillum
Spirillum bacteria possess a rigid spiral structure and tend to be larger than other spiral-shaped bacteria. They are often found in stagnant water and are characterized by their thick, rigid cell wall and flagella, which are used for movement.
Spirochete
Spirochete bacteria are known for their flexible and tight spirals. They move using axial filaments and are the causative agents of diseases such as syphilis and Lyme disease, caused by Treponema pallidum and Borrelia burgdorferi, respectively.
What’s the difference between the flood tide and the ebb tide
The difference between the flood tide and the ebb tide lies in the direction of the water flow relative to the shore.
Flood tide, also known as the incoming tide, occurs when the water level is rising, and the tide is coming in towards the shore. This phase takes place as the sea level rises, approaching high tide. During the flood tide, water from the ocean moves towards the coastline, often replenishing coastal wetlands and bringing in nutrients.
Ebb tide, on the other hand, is the outgoing tide. It happens when the water level is falling, and the tide is moving away from the shore. This phase begins after high tide, as the sea level starts to decrease, leading to low tide. During the ebb tide, water flows back into the ocean, often exposing coastal areas such as beaches, rocks, and marine life that are usually submerged.
The cycle of flood and ebb tides is caused by the gravitational pull of the moon and the sun on the Earth's oceans, along with the Earth's own rotation. Typically, there are two high tides and two low tides each day, with the flood tide transitioning to the ebb tide approximately every 6 hours and 12.5 minutes, due to the moon's orbit around the Earth.
Jamaal drove to the mountains to go camping. He drove 300 miles in 5 hours. What was his average speed?
Answer:
Speed=60 miles / hour.
Explanation:
Average speed = Total distance traveled by object / time to cover distance
=300/5
= 60 miles per hour
It is scalar quantity which means it is defined by only magnitude.
What is the difference between an iconic bond and a covalent bond?
Which situation would result in a theory being replaced rather than revised? Additional experiments are performed that confirm the existing theory. New information is discovered that contradicts the existing theory. Scientists disagree on how to revise a theory, so they replace it instead. New experiments to confirm the theory yield inconclusive results
Answer:
New information is discovered that contradicts the existing theory.
Explanation:
A theory is tested and the observation may confirm or contradict the theory. When the results of newly conducted tests confirm the theory, then the theory reaches a consensus in the scientific community. After conducting tests if new observation emerges which adds new information about the existing theory then it is revised. However, if new data keeps emerging that contradict the existing theory it will be rather than revised.
The most superficial layer of the epidermis in which all the cells still possess a nucleus is the ________.
The most superficial layer of the epidermis in which all the cells still possess a nucleus is the stratum granulosum.
What is Stratum granulosum?The stratum granulosum is a thin layer of cells in the epidermis which is lying above the stratum spinosum and below the stratum corneum. Keratinocytes are the cells which are migrating from the underlying stratum spinosum become known as the granular cells in this layer of cells.
The cells of the stratum granulosum accumulate the dense basophilic keratohyalin granules. These granules are found to contain lipids, which are along with the connections, which help to form a waterproof barrier which functions to prevent the fluid loss from the body.
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Ramon is looking at pictures of scantily clad women in a magazine. he is focusing on their body parts, particularly their chest and legs. which part of ramon's brain is activated by this viewing
Which molecule do plants use to store extra glucose?
A. Glycogen
B. Myosin
C. Lipid
D. Starch
Answer:
Option D, Starch
Explanation:
Starch is a polysaccharide which is used to store extra glucose in plants. Plant produces glucose (sugar) during the process of photosynthesis in the presence of sunlight. Plant then uses this sugar to produce energy in the form of energy molecules ATP. Extra sugar which is stored in starch is used by plants whenever they need energy. A small amount of glucose is taken from starch to fulfill the energy requirement of plant.
Hence, option D is correct
Why is your brain a good scientific tool?
An inner and an outer membrane are characteristic of which organelle?
If one gram of each of the following were eaten as food, identify which would yield the most energy within the cell.
The name of the full set of genes that provides the instructions for making an individual member of a certain species is the _____.
A(n) _____ scan depicts brain activity by detecting where radioactive forms of glucose go while the brain performs a given task.
Final answer:
A Positron Emission Tomography (PET) scan is used to depict brain activity by tracing radioactive substances injected into the bloodstream, revealing which brain areas become active during various tasks. It is particularly noted for its capability to track metabolic activity in the brain, making it a crucial tool in neuroimaging alongside Functional Magnetic Resonance Imaging (fMRI), which measures blood oxygen levels.
Explanation:
A Positron Emission Tomography (PET) scan is used to depict brain activity by detecting where radioactive forms of glucose go while the brain performs a given task. This method involves injecting a radioactive substance into the bloodstream, which then travels to active areas of the brain. As active neuron populations require metabolites, more blood, and consequently more radioactive substance, flows into those regions. PET scanners can then detect this activity, allowing researchers to infer which parts of the brain were active during the task.
Functional Magnetic Resonance Imaging (fMRI), on the other hand, measures changes in oxygen levels in the blood to also provide images of brain activity during tasks without the need for injecting any substance. Both of these neuroimaging tools, however, have poor temporal resolution, not providing precise timings of when the brain activities occurred.
Engaging in regular physical activity and reducing sedentary activities can:
A. Promote health
B. Enhance psychological well-being
C. Promote a healthy body weight
D. All of the above
I. explain the changes in heart rate between conditions. describe the physiological mechanisms causing these changes.
Final answer:
Changes in heart rate between conditions can be explained by physiological mechanisms that affect heart function, such as sympathetic and parasympathetic stimulation from the cardiovascular centers in the brain.
Explanation:
Changes in heart rate between conditions can be explained by the physiological mechanisms that affect heart function. For example, during exercise, the heart rate increases to meet the increased demand for oxygen and nutrients in the muscles. The sympathetic stimulation from the cardiovascular centers in the brain, specifically the cardioaccelerator regions, increases heart activity, while parasympathetic stimulation from the cardioinhibitory centers decreases heart activity. Other factors, such as body temperature and blood flow, can also affect heart rate.
name 2 human cell types that have more mitochondria than most other cells:_____________&_______________ explain why these cell types contain so many mitochondria
The lobe of the cerebral cortex which contains the auditory area is the
Juan and Shanice took samples from around their classroom to grow bacterial cultures. After the bacterial cells has been growing for three days in the petri dishes, what is the most appropriate tool for them to use to measure the diameters of the colonies?
Answer: metric ruler
Explanation:learned that the hard way
How is osmosis involved in the absorption of water and nutrients?
A cookies has 122 calories. how many grams of protein are in the cookie if it has 15 grams of carbohydrate and 6 grams of fat?
A client enters the emergency department reporting shortness of breath and epigastric distress. what should be the triage nurse's first intervention
Answer:assess vital
Explanation:
The mantle and core would be considered part of which earth system realm
________ is an autosomal recessive condition resulting in degeneration of the nervous system. Down syndrome Huntington's disease Kleinfelter syndrome Tay-Sachs disease
Answer:
The correct answer is Tay-Sachs disease.
Explanation:
Tay-Sachs disease is an autosomal recessive genetic disease that causes the degeneration of the nervous system. This disease only expresses itself if an individual has two recessive copies of a particular gene that cause this disorder.
The reduced level or absence of an essential enzyme beta-hexosaminidase causes this disorder.
Thus, the correct answer is Tay-Sachs disease.