why is the late Cambrian thought of as the period of the greatest evolutionary change in life forms on earth's history?
Answer:
The Cambrian Period marks an important point in the history of life on Earth; it is the time when most of the major groups of animals first appear in the fossil record. This event is sometimes called the "Cambrian Explosion," because of the relatively short time over which this diversity of forms appears.
I’ll really appreciate it if you help me out with these 2 questions .
Answer:
8. C
9. Im sorry I don't know
1.
Large sharks eat many other marine life animals. The sharks and the animals they eat are all part of which level of organization?
Answer:
These sharks eat small fishes that come to the level 2 and small planktons as level 1
Explanation:
anyone know these please help me out i need a lot of help
Answer:
1. False
2. True
3. True
4. True
Explanation:
1. Not all mutations are bad! Some actually can provide people with advantages.
2. Back to number 1, yes! Some mutations can give you advantages that people would not normally have.
3. Yes! Melanin helps protect our skin from damage from UV rays from the sun. This is why people with lighter skin tend to “tan” or “burn”.
4. Yes! Mutations are often a random process. We cannot determine whether or not someone will be born with or without a mutation.
Allows sugars and salts to pass through the membranes
is this a transport protein market protein or receptor protein?
Answer:
selective membrane
Explanation:
i think this is what you are asking
How does the inheritance of dominant traits differ from the inheritance of recessive traits?
Answer:
Dominant traits are more visible than recessive traits
Bobcats are generally solitary and establish territories of a certain size where they hunt for food. What type of population dispersion would you expect bobcats to have?
Answer:
Uniform dispersion.
Explanation:
The bobcats' population distribution would be a uniform dispersion because they are distributed in an area in a balanced way. That is to say, that there is space between them and that each bobcat establishes its personal space when hunting and for their daily life. As they are solitary animals, they do not live in groups and only associate with other bobcats to reproduce themselves.
A nucleotide is made of three parts. They are: __?__, __?__, and __?__.
Answer:
Sugar, phosphate group, and a nitrogenous base.
Explanation:
Image does not belong to me. All image credits goes to its rightful owners.
What process will the cell use to make viral proteins?
Answer:
Transcription / mRNA production
Explanation:
If the organisms were put in a dichotomous key for dassification, what would makethe organisms in the diagram different
from organisms that fall under the taxonomic group Bacteria?
A The organisms in the diagram are autotrophs.
B. The organisms in the diagram are unicellular.
C The organisms in the diagram are mobile and move with flagella,
OD The organisms in the diagram contain membrane-bound organelles,
Type here to search
Answer:
98.9% sure it's B. as far as I know
True or false. Without wind there would be no weather.
Answer: Absent a gentle breeze or mighty gale to circulate both warm and cold weather around the Earth, the planet would become a land of extremes. Areas around the Equator would become intensely hot and the poles would freeze solid. Whole ecosystems would change, and some would completely disappear.
Which of the following plant propagation methods requires sterile conditions?
• hybridization
• clone by layering
• root division
• tissue culture
Which best describes the way a sound wave is sent through the radio?
sound wave → radio wave
radio wave → sound wave
radio wave → sound wave → electrical signal → sound wave
sound wave → electrical signal → radio wave → sound wave
Sound waves propagate from the sound source. The sound through radio comes through the electrical signal, radio wave, and sound wave. Thus, option D is correct.
What is a sound wave?A sound wave is an acoustic wave that travels through a medium through the disturbance of the particles in a longitudinal direction. A few examples are radio, whisper, rustling, etc.
The sound waves in radio first get converted into the electrical signal that passes through the circuit of the radio that further gets transferred as radio waves.
These radio waves are the part of the electromagnetic spectrum that travels at a little less speed than light. The radio waves again get converted into sound waves as it leaves the system and reaches the ear of the organism.
Therefore, option D. sound wave → electrical signal → radio wave → sound wave is the correct order.
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What are disadvantages of the "Aoudad"?
PLEASE ANSWER ASAP!!
Answer:
Anecdotal reports suggest aoudad out compete native big game species for food, water, and cover as well as act as a disease reservoir on Texas landscapes. If significant overlap for resources and space are occurring among aoudad, desert bighorn and mule deer, aoudad could outcompete and outgrow native populations.
Explanation:
What is the dynamic of type 1 diabetes process concerning cellular disruption and what is its effect on the major body systems?
Please help, will give brainliest
Explanation:
Type 1 diabetes occurs when some or all of the insulin-producing cells in the pancreas are destroyed. This leaves the patient with little or no insulin. Without insulin, sugar accumulates in the bloodstream rather than entering the cells. As a result, the body cannot use this glucose for energy.
In most people with type 1 diabetes, the body's immune system, which normally fights infection, attacks and destroys the cells in the pancreas that make insulin. As a result, your pancreas stops making insulin. Without insulin, glucose can't get into your cells and your blood glucose rises above normal.18-
Answer:
it cal also contribute to heart problems and kidney problems later on
Explanation:
Which structure does the immune system target in type 1 diabetes?
a. beta cells of the pancreas
b. liver cells that release glucose
c. insulin receptors on fat cells
d. red blood cells in the bloodstream
Answer:
The thymus plays an important role in deletion of potentially autoreactive T cells. However, the presence of islet-specific T cells in the circulation of type 1 diabetes patients and healthy subjects indicates that the thymus is not capable of efficiently deleting all autoreactive T cells (Mathis and Benoist 2009).
Explanation:
Answer:
A: beta cells of the pancreas
Explanation:
Type 1 diabetes makes the pancreas produce little to no insulin.
Which of the following is evidence of Continental Drift?
Shape of the continents
Distribution of fossils
Distribution of geological features
All of these
None of these
Answer:
All of these
Explanation:
If you put all of the continents together, they fit like a puzzle. If you look at mountains and match these when they are put together, mountains will be in similar places. The fossils found in Antarctica were fossils from warm climates. That could only be if all continents used to be one!
Photosynthesis requires light, water, carbon dioxide, and
____.
In the past, pacific sea otters were hunted to near extinction.
Without the otters, kelp forests along the coast started to die
because sea urchins, the otter's favourite food, were able to
overgraze them. Once otters became protected, the kelp
forests began to recover as the urchins were back in check.
In this kelp forest ecosystem, sea otters are a ________
species.
Enter the answer
Check it
Answer:
Keystone
Explanation: keystone
pls help!!! osmosis help needed!!
Answer:
1. 10% 2. 90% 3. 80% 2. Yes 3. Into 3. Swell 6. Hypotonic
Explanation:
1. Given the image, it shows there is 10% glucose outside the cell.
2. Because there is 10% glucose outside the cell, you can automatically conclude that there is 90% of water outside. (You want it to equal to 100%. So, 10 + 90 = 100)
3. Given 20% glucose inside the cell based on the image, you can conclude that there is 80% water inside the cell.
2. Yes, osmosis will occur. Osmosis is the movement of water from a higher concentration to a lower concentration. In this case, there is more water outside the cell than in. So, yes, osmosis will occur.
3. The water will move into the cell (There's less water inside, and more outside, so of course, the water will move in).
3. The cell will swell, since water is getting moved in.
6. This is a hypotonic solution. Definition of a hypotonic solution: The concentration of solutes outside the cell is less than that of water. Hypotonic solutions always swell, as water moves into it.
Hopes this helps!^^ I tried the best I could at explaining.
Humans burn fossil fuels and wood, releasing carbon dioxide into the atmosphere. This carbon dioxide is then absorbed by trees for photosynthesis. These processes are contributory to which chemical cycle?
Carbon cycle controls the amount of carbon dioxide in the atmosphere. These processes are contributory to the carbon cycle in the environment.
What is a carbon cycle ?
The carbon cycle is nature's method of recycling carbon atoms, which repeatedly go from the atmosphere into Earth's living things and back into it. The majority of carbon is preserved in rocks and sediments; the remainder is preserved in the ocean, the atmosphere, and living things.
Life on Earth is reliant on the carbon cycle. The quantity of carbon that is naturally released from reservoirs is equal to the amount that is naturally absorbed by reservoirs because nature tends to maintain carbon levels in balance. This carbon balance must be preserved for the earth to continue to support life.
Therefore, the carbon cycle is an important chemical cycle.
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Cattle egrets forage (feed) in fields among cattle. The egret gets easy access to flying insects stirred up
by the cattle, and the cattle don't care if they are there or not.
A.Mutualism
B.Commensalism
C.Parasitism
Answer:
B.
Explanation:
B. What is the distance between the two troughs?
If the image is too blurry click on it.
How does a visking tubing differ from a cell membrane
Join the following terms:
Answer:
The Viking tubing is meant to be the cell membrane. Glucose manages to move out of the bag and into the surrounding water but starch does not. Not all substances can pass through the cell membrane; some molecules, like starch are too large. The cell membrane is called selectively permeable because of this.
Explanation:
PLEASE HELP FAST!!
Why is this considered a theory instead of a hypothesis
or a law?
se
O It is a statement of fact about how nature works
instead of an explanation.
o It provides an explanation for many observations and
accepted hypotheses.
o It describes how to test a possible explanation of one
specific relationship.
It has not changed over time even though new
technology has been developed.
Answer:
C
Explanation:
Where are chromosomes found in the human body what are chromosomes made of
Answer:
Chromosomes are thread-like structures located inside the nucleus of animal and plant cells. Each chromosome is made of protein and a single molecule of deoxyribonucleic acid (DNA). Passed from parents to offspring, DNA contains the specific instructions that make each type of living creature unique.
A healthy lifestyle is important because
A) people cannot control their genetic traits
B) lifestyle choices are the most important factor in disease prevention
C) unhealthy lifestyles lead directly to toxic environments
D) all of the above
Answer:
C
Explanation:
If your not carefull who you're around you can get hurt or i dont known how to explain it
Answer:
A
Explanation:
The speed of an object at a particular moment in time is known as the........
A. instantaneous speed
B. instantaneous velocity
C. Speed
D. Velocity
Answer: It would be A. Instananeous speed
Explanation: It is measured in metres per second
Please help if you answer correctly i will give brainliest
Answer:
1) Chicken: Codominance
2) Zebra: Independent assortment
3) Flowers: Incomplete dominance
4) Dalmatian: Law of segregation
Explanation:
Due to technical problems, you will find the complete explanation in the attached files