Answer:
a species on which other species in an ecosystem largely depend, such that if it were removed the ecosystem would change drastically
Explanation:
Answer:a species on which other species in an ecosystem largely depend, such that if it were removed the ecosystem would change drastically.
Explanation:
The American Beaver (Castor canadensis) is one example of a keystone species in North America. In any arrangement or community, the “keystone” is considered one of the most vital parts. In a marine ecosystem, or any type of ecosystem, a keystone species is an organism that helps hold the system together.
Dating the fossil at the site it was found, without benefit of laboratory equipment, would BEST be described as
A) carbon dating.
B) imprint dating.
C) relative dating.
D) half-life dating.
Answer:
Answer c) Relative Dating.
What are the roles of different organelles in a cell?
Answer:
Functions of different cell organelles:
Nucleus: contains all the genetic material, acts as information center and tells all the organelles what to do, RNA transcription.
Mitochondria: generates energy through respiration
Endoplasmic recticulum (rough): transport and storage of material; (smooth ER): creation of lipids and fats
Ribosome: protein creation by RNA translation
Golgi apparatus: responsible for synthesis, packing and processing of proteins
Chloroplast: responsible for glucose creation (by photosynthesis)
Cytoplasm: is region where all chemical reactions take place and is the jelly like fluid that holds all the organelles in place inside of the cell
lysosome: responsible for breakdown of larger molecules
Flagellum (or flagella): tail like organelle, assists motion
Vacuole: helps in maintenance of homeostasis and stores waste products or other materials like water / food
cell membrane: separates cell from the rest of the environment and controls what comes in and out of the cell
cytoskeleton: supports cell structure
There are a number of other organelles as well but i just named some of the common ones.
Answer:
the cell sturcture
Explanation:
In the food web below what organisms does organism A eat
Answer:
hop this hepl
Explanation:
ASAP Which level of organization is directly below organ system
A:organelle
B:Cell
C:Tissue
D:organ
Answer:
Here since the person above wants to be 3 years old, lemme try to help you, the answer will be D. Organ
Explanation:
Which of these are NOT found in plant cells?
a)cell membranes
b)centrioles
c)mitochondria
d)cell walls
Answer:
B. centrioles
Explanation:
Plant cells have cell walls, cell membranes and also contain mitochondria along the chloroplasts.
is kissingg the homies gae
Answer:
no
Explanation:
only if y’all have socks on
The elements carbon, hydrogen, oxygen, and nitrogen make up which percentage of the
human body?
O 50%
O 69%
78%
O 96%
Question 6
4 pts
Prompt
What is the difference between a niche and a habitat?
plz help it is due soon
Answer:
I think it's a) 0.3 km/min
Answer:
all you need to do is divide 20 by 6 and to give you a free pass the answer is 3 :) or 0.3
Explanation:
what is the most popular cat
According to the CFA (Cat Fancier's Association), exotic shorthair cats have been the number 1 breed since 2016. They are a cross between Persians and American shorthairs, and are admired for their Persian personality without the hassle of the daily grooming.
- Making more cells is needed for growth, development, and _______
repair.
Answer:
cell
Explanation:
Which statement is false?
O Polypeptides are made of amino acids.
O Lipids are made of fatty acids.
O Simple sugars are made of polysaccharides.
O Nucleic acids are made of nucleotides.
Sometimes after an intense exercise routine, an individual will have sore muscles 1 to 2 days following the exercise; this is called delayed onset muscle soreness. Although not completely understood, it is believed that one cause of this is damage that occurs to the Z disks and contractile filaments in the muscles. When the body attempts to repair this damage, an inflammatory response occurs that causes soreness a couple of days after the exercise has taken place. Which of these situations would likely lead to less delayed onset muscle soreness in an individual?
a. a mutation in the Z-disk protein that caused the attachment of the Z disk to the titin protein to be stronger
b. a mutation that would reduce the amount of lactic acid buildup in muscle tissue
c. a mutation in the Z-disk protein that caused the attachment of the Z disk to the titin protein to be weaker
d. a mutation that weakens the calcium binding ability of troponin
Answer:
The correct answer is option A. a mutation in the Z-disk protein that caused the attachment of the Z disk to the titin protein to be stronger
Explanation:
As delayed onset muscle soreness is thought to be led by the inflammatory response of the body in order to repair damage to the Z disks and contractile filaments in muscles, due to the intense exercise.
Mutation in the Z-disk protein would strengthen the connection between Z disks and contractile filaments as it is logical that this mutation could withstand more pressure or intense exercise before damage occurs to these tissues.
Besides plants and insects, what else would the student need in the ecosystem? Why?
Hormones are proteins that regulate many functions in the body, such as growth and cell differentiation. Which of the following does NOT describe a function of proteins in living organisms?
Answer Options:
Proteins store energy long term, provide lubrication, and insulate the body Proteins in the form of enzymes catalyze chemical reactions Proteins provide structures in the body, such as hair and muscles Proteins in the cell membrane help transport substances into and out of cellsAnswer:
Proteins store energy long term, provide lubrication, and insulate the bodyExplanation:
Proteins store energy long term, provide lubrication, and insulate the body - this is false, this describes the role of fats. Proteins in the form of enzymes catalyze chemical reactions - this is true, enzymes are an important class of proteins in the bodyProteins provide structures in the body, such as hair and muscles - this is true, for example our hair is made of a protein called keratin Proteins in the cell membrane help transport substances into and out of cells - this is true, proteins form important pumps and channels in the cell membrane(ANSWER NEED RIGHT AWAY!! PLS) A classmate claims that an apple and cupcake, both about the same size, give you the same amount of energy. Do you agree or disagree with this
statement? Explain.
Answer:
No, just because something is the same size doesn't mean it will have the same amount of energy. One thing can have more positive electrons and make it have more energy than the other.
which of these organisms are most likely to occupy similar niches in different ecosystem
A. Oak tree and maple tree
B. Kangaroo rat and kangaroo
C. Earthworm and freshwater eel
D. Koala and black bear
Oak tree and maple tree are most likely to occupy similar niches in different ecosystem.
What is an ecosystem?An ecosystem is defined as a system which comprises of all living organisms and physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.
Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other for requirement of energy.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.
Learn more about ecosystem,here:
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To kill a fungus, you could use a fungi-_______
Answer:
antivirus
Explanation:
Random mutations can occur in an organism's DNA, causing traits that are different from other organisms in that species. Sometimes these mutations can cause problems for the organism, but other times they are beneficial. What is a possible benefit to a random mutation in an organism?
Answer: It can increase an organism’s chances of surviving
Explanation:
A red blood cell is placed in a salty solution. When it shrivets due to loss of water, we say it has
•become turgid
•plasmolyzed
•lysed
•crenated
Answer:
It's crenated ( I asked Google btw)
3. How far can an S-wave travel in 6 minutes 40 seconds?
Answer:
1800km
Explanation:
This question will be answered using the attached S-wave graph.
The graph is plotted as time (y axis) against distance (x axis).
So, when
y = 6 minutes 40 seconds
x = 1.8 * 10³ km
So, we have:
x = 1.8 * 1000km
x = 1800km
which of the following are Vertebrates?
Worms
Answer:
a vertebrate is an animal with spinal cord surrounded by cartilage or bone
Explanation:
fishes,whales,sharks
amphibians
reptiles
birds
mammals
From what age are the earliest discovered paintings of swimmers?
Answer:
The paintings are estimated to have been created during the Neolithic 8,000 years ago.
5. Zebras (grass-eaters) are th
6. Lions (zebro-eaters) are
Quartamary consumen
7. Give examples of 2 "higher order" consumersShake racon
8. What two types of consumers are missing from this pyramid?
and
9. On the average, how much energy is lost from each trophic level?
Explain WHY.
10. Why are there so FEW quaternary and tertiary consumer in a food web?
2
What t
help asap plsssssssssssssssssssssss
You discovered a new species. Describe it using the 5 senses and give it a name
saturn and Uranus are alike in that they
Answer:
The correct answer is they both have rings around them
Explanation:
Saturn and Uranus are both planets in our solar system; indeed Saturn is the sixth planet while Uranus is the seventh planet. Besides this, Saturn and Uranus are giant planets, this means they are composed of gas or similar materials and they are massive. Moreover, as giant planets these two planets have a ring system, which means around them, there are dust and other particles that orbit the planet and form rings; although, in the case of Saturn these are massive and more visible. According to this, Saturn and Uranus are alike because they both have rings around them.
Answer:
They both have rings around them.
Explanation:
The only 4 planets in our solar system that are gas giants have rings.
What is the structure shown in the figure?
Nucleic Acids
Carbohydrates
Proteins
Lipids
Answer:
lipids
Explanation:
Look at your model and think about the relationship between oxygen and carbon dioxide in the sealed jar. Which of these statements is true?
Plants release only carbon dioxide during photosynthesis.
Plants use oxygen during photosynthesis.
Plants and animals use oxygen during respiration.
Plants and animals release oxygen during respiration.
Answer:
Plants use oxygen during photosynthsis.
Explanation:
Oxygen and carbon dioxide in the sealed jar relationship between oxygen and carbon dioxide is that Plants and animals use oxygen in respiration, hence option c is correct.
What is respiration?Water and carbon dioxide are converted into oxygen and glucose in photosynthesis and plant uses glucose and releases oxygen as a byproduct.
Oxygen and glucose are converted to water and carbon dioxide in cellular respiration. By-products of the process include carbon dioxide, water, and ATP, which are turned into energy.
Carbon is taken out of the atmosphere by photosynthesis and put back in by cellular respiration.
Therefore oxygen and carbon dioxide have a relationship in respiration, hence option c is correct.
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How big of an advantage does a variant of a gene have to give to start becoming more common in a population?
1. Greater than 0%
2. Greater than 5%
3. Double
Answer:
The correct answer is 1. Greater than 0%. An allele to become common must have a frequency of at least 0.005%
Explanation:
A polymorphic gene has more than two alleles. The more alleles there are in a population, the more polymorphic the gene is.
In a polymorphic gene, the allelic frequency of the most common allele must be minor of 99%, while the less common allele must have an allelic frequency superior to 0.005%. If any allele does not reach this frequency in the population, it is not considered to be common. In fact, it is considered to be a rare allele.
what is photosynthesisi
Answer:
Photosynthesis is the process used by plants, algae, and certain bacteria to harness energy from sunlight and turn it into chemical energy.
Answer:
the process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water.
Explanation:
Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a byproduc