Human activities affect marine life and marine habitats through overfishing, habitat loss, the introduction of invasive species, ocean pollution, ocean acidification and ocean warming.
About Marine ecosystemsMarine ecosystems are life in the sea that includes biotic (living) and abiotic (non-living) elements. In essence, everything contained in the sea is included in the marine ecosystem.
The biotic elements are fish, shellfish, algae, and anemones. While the abiotic elements are water, oxygen, sunlight, salt, sand, and rocks.
Citing various sources, the sea has an area of more than two-thirds of the earth's surface or around 71 percent.
Because it is so broad, the food chain is diverse. One of the food chains in a marine ecosystem is energy sun-algae-small fish-big fish-sharks-decomposers.
In this food chain, solar energy helps algae photosynthesize. The results of algae photosynthesis are food for small fish.
Small fish as first consumers are then eaten by big fish. Sharks occupy the highest place as predators that eat large fish. Then it will be broken down by decomposers when it dies.
The importance of the marine ecosystem because it provides many benefits for life, such as a place for research, a source of food, a source of drinking water, as a tourist attraction, flood control, and a place for cultivating shellfish, fish, and others.
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Does mass alone determine whether an object will float or sink? Explain
Answer:
yes because if the mass is heavy it gonna sink, if its light its gonna float
Explanation:
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Answer:
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Explanation:
Which event shows conditions that lead to natural selection?
A-Weeds are removed by a gardener from a public park
B-Wild horses are tamed over many years and selectively allowed to reproduce.
C-A crab produces millions of offspring in a year, but few survive to adulthood.
D-Farmers collect the largest corn seeds to plant in their fields the following year.
In a food chain that includes, in order, plants, markhors, and snow leopards, what roles do markhors play? (Select all that apply.)
Answer:
-They are eaten by snow leopards
-They eat plants
Explanation:
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What characteristic do sea stars and brittle stars have in common?
Both have flexible joints.
Both have teeth-like feeding structures.
Both use tube feet to catch prey.
Both have tentacles.
Answer:
They typically have a tough, spiny surface, which inspired their name (in Greek, echinos means “spiny” and derma means “skin”). They also have the unusual ability to regrow lost body parts, and sea stars and brittle stars can regrow arms if broken off or eaten
Explanation:
Sea stars and brittle stars both use tube feet to catch prey. Therefore, option C is correct.
What are sea stars and brittle stars?Echinoderms with a star form that belongs to the class Asteroidea are known as starfish or sea stars. These terms are frequently used incorrectly to refer to ophiuroids, which are properly called brittle stars or basket stars in common usage. Due to their membership in the class Asteroidea, starfish are also referred to as asteroids.
The benthic (bottom-feeding) fauna of the maritime environment includes brittle stars. They belong to the Phylum Echinodermata, which includes marine organisms with radial symmetry, five components, and frequent spines. They are commonly referred to as echinoderms.
Sea stars and brittle stars both use tube feet to catch prey. Therefore, option C is correct.
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Find 2 ways that natural gas forms. List the steps of the two carbon pathways below. Label each location with A for atmosphere, B for the biosphere, G for geosphere, or H for hydrosphere. Use P for the anthroposphere.
Answer:
Biogenic and thermogenic
Explanation:
Biogenic and thermogenic are the two ways or mechanism that is responsible for formation of natural gas. Biogenic gas is formed with the help of methanogenic organisms that is present in marshes, bogs, landfills, and shallow sediments. Thermogenic gas is formed from organic matter that is buried in the deeper earth where the temperature and pressure are very high.
The organic pathway of the carbon cycle is the pathway in which carbon moves from atmosphere, through producers, herbivores and other organisms in the ecosystems, and converted back to the atmosphere.
In geological pathway, carbon moves from the atmosphere, through the ocean to rocks and the mantle, and then back to the atmosphere.
In which soil horizon do we find organic material?
Answer:
We can find organic material in
Top soilHope it will help :)
How would the presence of cilia, flagella, and pseudopods improve the chances of survival of a unicellular protist?
A.
by increasing the likelihood of obtaining nutrients
B.
by increasing the rate of water exchange
C.
by decreasing the rate of cell division
D.
by decreasing the energy needs of the organism
Answer:
i really dont know but I need the answer too :(
Explanation:
The presence of cilia, flagella and pseudopods improve the chances of survival of a protist by increasing the likelihood of obtaining nutrients. Thus, the correct option is A.
What is locomotion?
Locomotion is the basic act or ability of something to transport or move itself from one place to another. Many protist species have the presence of some type of locomotory organelles on their body which are easily visible under a light microscope. A protists can move by gliding or floating, and by use of organelles such as flagella or cilia.
Protists use these locomotory organelles to find food, a mate, a suitable habitat or to survive and escape form the predators. Types of Movements involved in locomotion include axial and appendicular.
Therefore, the correct option is A.
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PHET skate park . Consider this equation: Kinetic Energy = ½ mv2. Which of those variables is changing as the skater moves up and down the track?
Velocity is the variable which is changing during motion of skater.
Impact of velocity on energyVelocity is the variable which is changing when the skater moves up and down the track because moving upward on the slope decrease the speed of the skater while on the other hand, velocity increases when moving downward on the slope.
Mass of the body which is skating remain constant or can't change with height. Mass is the amount of matter present inside the body so we can conclude that velocity is the variable which is changing during motion of skater.
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What is true about the insanity defense?
It is defined in the Diagnostic and Statistical Manual of Mental Disorders.
It can be used only if a person is diagnosed with a specific disorder from the DSM.
It is a legal term used to determine if a person can be held accountable for a crime.
It is a legal term that helps to determine if a person committed a crime or not.
It cannot be used if a person was previously found to be responsible for a different crime.
It's a legal term used to determine if a person can be held accountable for a crime. Hope this helps; have a wonderful day.
Which of the following statements is the of asexual reproduction?
A. It produces offspring
B. It produces genetically identical offspring
C. It produces genetic diversity
D. It produces offspring that are resistant to antibiotic.
The answer is B because the new cells formed during asexual reproduction are formed by mitosis there is no genetic diversity.
Use your observations from the lab activity/lab video and the data tables to explain how salinity affects the way cold water from melting ice mixes with warm water.
MUST DO THE GIZMO LAB
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Answer:
The link doesn't work but it is known that when you add salt to ice, the ice not only melts but will actually get colder.
hope this at least helped you :>
Which of the following represents a cross between two heterozygous plants?
A. Ww x WW
B. ww x WW
C. Ww x Ww
D. WW x WW
You do a serial dilution in the same manner as the one in the video. A plate with a sample volume of 10-6 mL produced 43 colonies. What was the original cell density (CFU)?
Answer: 43 x 10^6 CFU.
Explanation:
Plate count is a method used to determine the number of viable microorganisms in a sample. When the bacterial concentration is high, serial dilutions are carried out in a 1:10 sequence. Then, the dilutions are successive dilutions keeping the dilution factor constant at each step. Small aliquots of these dilutions are seeded in medium contained in a Petri dish where the bacteria grow forming colonies. Then the plates are incubated and colonies develop both within the agar and on the surface.
If the concentration of the seeded aliquot is too high, the bacteria will grow too much and it will not be possible to distinguish the colonies. However, if the concentration is very low, the number of colony forming units (CFU) may be very low and thus can be counted.
Colony forming units are calculated:
CFU = Number of colonies / (volume seeded on the plate * dilution).
The dilution is 10^-6, the number of colonies counted is 43, and usually the volume plated is 0.1 mL, so we replace that in the equation:
CFU= 43 / (0.1 mL * 10^-6)
CFU= 43000000 = 43 x 10^6
What are the three steps of the water cycle if the rain falls directly into the ocean?
Answer:
1. evaporation
2. condensation
3. precipitation
Explanation:
Can hydrogen peroxide be broken down by catalysts other than those found in a living system? What is/are the control(s) and why are they needed?
Answer:
hi I not talk spanish
Explanation:
not talk spanish
What caused the Kingdom of Life to change? Give 3 reasons minimum.
Answer:
Due evolution, discoveries and having both characteristics.
Explanation:
The Kingdom of Life change due to evolution in the body of organisms, discoveries of new organisms that are different from plants and animals. There are some organisms that have both plant and animal characteristics so it can't be placed in plant or animal kingdom so that's why the kingdom of life changes from two kingdom system to 5 kingdom system.
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Explain the importance/need for homeostasis.
Answer:
look
Explanation:
So ur body can work properly and without it you can die (: Hope I helped im not the best at this.
There is balance between Apoptosis and Mitosis. What is the
characteristic of life that would involve maintaining this balance?
Metabolism
Respond to Stimuli
Homeostasis
Universal Genetic Code
Answer:
Homeostasis
Explanation:
If one DNA strand reads CCGTAATGCAT, what will be the sequence of the complimentary strand?
how can we control bacterial disease?
Answer:
Bacterial diseases are treated with antibiotics. Antibiotics work by killing the harmful bacteria or by stopping them from reproducing and spreading. Different types of antibiotics are effective for treating specific types of bacteria.
Explanation:
Answer:
by using antibiotics, antibiotics are harvested from fungi because they have a gene that kills the bacteria, i think it only works on bacterial infections, most of the antibiota said are used on animals and live stock.
Explanation:
The amino
Each codon calls for one
acids are linked together by
It takes many amino acids to form a protein.
plz answer quick
Answer:
1. Proteins.
2. Peptide Bonds.
Explanation:
I majored in Biology
How many alleles are typically found for mitochondrial genes?
1. 8
2. 1
3. 4
4. 2
Answer:
The answer is 2.1
Answer:
two alleles
Explanation: because This dynamic aspect of mitochondrial transmission from cell to cell is termed mitotic segregation. In Mendelian genetics, a person's nuclear DNA can contain, at most, only two alleles for any particular autosomal gene, one paternally derived (e.g., allele “A”) and the other maternally derived (e.g., allele “B”).
I hope this is what your looking for.
All levels of biological organization and discription?pllsss paki sagutan po
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The process our cells use to convert broken down glucose into carbon dioxide (CO2) and water (H2O) is called what?
Question 3 options:
Aerobic Respiration
Anaerobic Respiration
Breathing Respiration
Cellular Respiration
Answer:
Aerobic Respiration
Explanation:
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Why is it important to know the average mutation rate when using DNA comparisons to determine
how long ago lineages split?
Answer:
mutation rates can be used to design molecular clocks in order to estimate divergence times among species
Explanation:
In evolutionary biology, the substitution rates (also known as mutation rates) are used for the development of 'molecular clocks' which allow estimating the divergence times among species or among taxonomic groups. Molecular clocks can be designed by estimating the divergence rate of nucleotide sequences (either DNA or RNA) and amino acid (protein) sequences. These substitution rates can also be used to track how quickly viruses evolve (for example, in a pandemic situation).
harles Darwin had a hobby of ______________ domestic pigeons.
Answer:
breeding
Explanation:
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The diploid cells of a radish plant contain 18 chromosomes. How many chromosomes are in a radish plant's haploid cells?
Answer:
9
Explanation:
The diploid chromosome number for a radish is 18 and the diploid chromosome number for cabbage is also 18. The haploid number for these species is nine. Therefore, the gametes of the radish and cabbage contain nine chromosomes.
Describe how Pangaea first split apart around 200 million years ago.
Answer:
Pangea was the world's supercontinent, with its splitting came preliminary continents of today.
Explanation:
The splitting occurred due to the movement of tectonic plates, where plates spread apart and moved the landmasses with it.