How can students in the photograph use the net to sample the invertebrates in the river.
Answer and Explanation:
Macroinvertebrate communities show spatial and temporal variability. Many taxons have more affinity for one specific type of habitat.
There are two principal sampling techniques. Qualitative and cuantitave. Qualitative techniques provide data about the river richness and the relationship between the different taxonomic group's abundance. They allow the obtention of the most representative and abundant taxons, estimates their densities, biomass, and calculates the diversity indexes for each sampling site by period. Nets are needed to sample.
Every possible microhabitat must be sampled. The use of the different sampling elements depends on the substrate.
Hard-substrated sites, such as rocks or wood and organic matter, are sampled using a Surber net. The net is placed counter-current. The substrate must be moved and removed up to 10-15 cm deep, checking that animals and the thin sediment lie on the net. Samplings must be done from downstream to the upstream direction, taking replicates per substrate. Invertebrates must be washed on a strainer. Finally, place each of the samples in a plastic bottle, fixate the material with formaldehyde 4% and take it to the lab for its taxonomic identification.1. Why is it important to replicate DNA?
Answer:
Here you go
Explanation:
The purpose of DNA replication is to produce two identical copies of a DNA molecule. This is essential for cell division during growth or repair of damaged tissues. DNA replication ensures that each new cell receives its own copy of the DNA.
Which of the following is formed when a group of tissues works together to perform a common function ?
A. Body
B. Organ
C. Organ system
D. Braun
Answer: The answer is A
Explanation: Research and Edu labs
ASAP! 30 POINTS!!! Write a persuasive paragraph that argues either for or against wind energy. Be sure to include both the pros and cons of wind energy in your paragraph. Use all data, evidence and examples that you are aware of in your paragraph.
Answer:
Disadvantages of wind energy
Unpredictable. Perhaps the biggest disadvantage to wind energy is that it cannot be produced consistently. ...
Threat to wildlife. Wind energy does not cause environmental problems through greenhouse gas emissions, however, turbines can have an impact on wildlife. ...
Noise. ...
Looks. ...
Location limitations.
Explanation:
ᴍᴀʀᴋ ᴀs ʙʀᴀɪɴʟɪᴇsᴛ
Answer:
Wind energy is one of the most commonly used types of renewable energy. and also happens to be one of our fastest-growing sources of electricity. However, while there are a number of environmental benefits to using wind energy, there are some downsides. On the pros side, wind is a clean, renewable energy source, and is one of the most cost-effective sources for electricity. On the cons side, wind turbines can be noisy and unappealing aesthetically, and can sometimes adversely impact the physical environment around them. Similar to solar power, wind power is also intermittent, meaning that turbines are reliant on weather and therefore aren’t capable of generating electricity 24/7. Unlike coal, natural gas, or oil, generating electricity from wind doesn’t result in greenhouse gas emissions. While there are some environmental considerations that come with building large wind farms, once operational, wind turbines themselves don’t require burning any fossil fuels to operate.
Additionally, wind energy is completely renewable and will never run out. In opposition to traditional fossil fuels resources that replenish very slowly, wind naturally occurs in our atmosphere, and we don’t have to worry about supply issues in the future.
As far as upfront costs go, wind farms or individual turbines can be expensive to install. However, once up and running, operating costs are relatively low; their fuel (wind) is free, and the turbines don’t require too much maintenance over the course of their lifetime.
A wind turbine’s effectiveness in generating electricity depends on the weather; thus, it can be difficult to predict exactly how much electricity a wind turbine will generate over time. If wind speeds are too low on any given day, the turbine’s rotor won’t spin.
This means wind energy isn’t always available for dispatch in times of peak electricity demand. In order to use wind energy exclusively, wind turbines need to be paired with some sort of energy storage technology.
One of the biggest downsides of wind energy is the noise and visual pollution. Wind turbines can be noisy when operating, as a result of both the mechanical operation and the wind vortex that’s created when the blades are rotating. Additionally, because wind turbines need to be built up high enough to capture a good amount of wind, the turbines can often interrupt otherwise scenic landscapes, such as mountain ranges, lakes, oceans, and more.
Explanation:
A certain dominant gene is located on the X chromosome. A father will transmit the Gene and the resulting condition to:
Are there any parts of the human body that get oxygen directly from the air and not from the blood?
other then the lungs no all of the body parts get oxygen from blood cells
What is the atomic number of sodium?
Answer:
the atomic number of sodium is 11
11 is the atomic number of sodium
Will mark brainliest!
Answer:
true
Explanation:
please be my bsf and help me answer this
Answer:
photosystems :)
Explanation:
Answer:
b
Explanation:
Classify each planet as an inner planet or an outer planet.
Question 5
The diagram below shows a population of mice over time.
Original
Population After
Population
One Month
Next Generation
Which of the following statements is supported by the information in the diagram?
A
The light mice are poorly adapted to survive in any environment. Because of this, fe
genes.
The dark mice all have identical genes. Because of this, the dark mice were more li
B
Answer: its c btw :)
Explanation:
Your from Ms Cunningham class, I know :) I CAUGHT U
In the Hershey Chase experiment components of bacteriophages were labeled with radioactive isotopes of sulfur and phosphorus What was
the Hershey-Chase evperiment designed to determine?
Answer:
c
Explanation:
It was designed to determine whether the genetic material of the bacteriophage (a type of virus that infects bacteria) is made of DNA or protein.
What was Hershey-Chase experiment?The Hershey-Chase experiment, also known as the "Blender Experiment," was a classic experiment in molecular biology that was conducted in 1952 by Alfred Hershey and Martha Chase. It was designed to determine whether the genetic material of the bacteriophage (a type of virus that infects bacteria) is made of DNA or protein.
In the experiment, components of the bacteriophage were labeled with radioactive isotopes of sulfur and phosphorus. The labeled phages were then used to infect bacterial cells, and the cells were subjected to various treatments to separate the viral components from the bacterial components.
The results of the experiment showed that the genetic material of the bacteriophage was made of DNA, not protein. This was determined by the fact that the labeled DNA, but not the labeled protein, was able to enter the bacterial cells and infect them. This experiment provided strong evidence for the "central dogma" of molecular biology, which states that genetic information flows from DNA to protein, but not the other way around.
Learn more about Hershey-Chase experiment, here:
https://brainly.com/question/11697877
#SPJ2
What structure encloses almost all bacteria? Do bacteria have a structure that encloses the genetic material?
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!
As a human advances in age, their nervous system cells rarely divide. Which stage of the cell cycle are those cells in?
A. metaphase
B. telophase
C. interphase
D. cytokinesis
E. mitosis
F. metaphase
Answer:
i think E mitosis
Explanation:
What is the function of erythrocytes?
What is the term for all the components of the blood?
What is blood?
Answer:
1. The main physiological role of red blood cells (RBCs), or erythrocytes is to transport of gases (O2, CO2) from the lung to the tissues and to maintain systemic acid/base equilibria. In addition, RBCs are well equipped with antioxidant systems, which essentially contribute to their function and integrity.
2. In humans, it includes plasma (the liquid portion), blood cells (which come in both red and white varieties), and cell fragments called platelets. Plasma is the main component of blood and consists mostly of water, with proteins, ions, nutrients, and wastes mixed in.
3.Blood is a body fluid in humans and other animals that delivers necessary substances such as nutrients and oxygen to the cells and transports metabolic waste products away from those same cells.
hope it will help uHELP PLZZZZZZZ GIVEN 20 POINTS
the first one is to help u with the question
Answer: Linear would mean in a line, but it seems that all those graphs are just points soo
Explanation:
Which situation contributes most to the development of soil?
A.
migration of animals across land
B.
building up of snow in very cold areas
C.
lava flowing across the ground after volcanic eruptions
D.
breaking down of rock by wind, water, and ice
Which phase of cell division is shown?
Exploring mitosis.
anaphase II
telophase I
prophase I of meiosis
telophase II
Answer:
im assuming its the same question i had, i took the quiz and the answer was telophase I
Explanation:
like i said i took the k12 quiz and got 100%
The phase shown here is anaphase. the correct option is A.
What is anaphase?Anaphase is the stage of mitosis that occurs after metaphase, during which replicated chromosomes are split and newly replicated chromosomes are moved to opposite poles of the cell.
The missing image is attached below.
The image is showing the split of chromosomes, so it is indicating anaphase of cell division.
Thus, the correct option is A.
For more details regarding anaphase, visit:
https://brainly.com/question/13766396
#SPJ2
What causes Earth's seasons?
what are the two biggest planets on earth
Answer:
️ ️
Explanation:
A human cell that has 46 chromosomes would have __ daughter cells that each have __ chromosomes after mitosis.
Answer:
2 daughter cells, 46 chromosomes
Explanation:
Mitosis is reproduction of somatic cells, or body cells. It's end product will always be 2 daughter cells, each identical to one another, therefore meaning, it will also have the same number of chromosomes!
Answer: one daughter cells and each have 23
Explanation: mitosis is the first then meiosis
PLEASE HELP ME WITH BIOOOO
1. Many plants get energy from sunlight. 2. heterotroph get energy by eating other organisms.
3. Water that flows over the surface of the ground is called Surface
4. assimilation is the process by which bacteria turn nitrogen gas int
5. Dead organisms that were buried may turn into oil after millions o
6. Carbon from this material reenters the atmosphere by.
7. Explain: If energy and matter cannot be destroyed, what happens organism is eaten? Goes to other organisms that eat the organism 8. What is the law of conservation of energy? I
9. What is the law of conservation mass?
10. What is at the top of a energy pyramid?
11. A locust would be a consumer.
12. Nitrogen flows from producers through levels of consumers
13. How does water from the atmosphere return to Earth's surface?
14. What would happen to the ecosystem if there were no nitrogen-fixin bacteria?
Answer: All organisms need energy. ...
Autotrophs (producers) use energy directly from the sun or from chemicals to produce organic molecules. ...
Heterotrophs (consumers) obtain energy by consuming other organisms. ...
The flow of energy in an ecosystem can be represented with a food chain or food web
Explanation: A heterotroph is an organism that eats other plants or animals for energy and nutrients. The term stems from the Greek words hetero for “other” and trophe for “nourishment.” Organisms are characterized into two broad categories based upon how they obtain their energy and nutrients: autotrophs and heterotrophs. A consumer is an organism that eats other organisms or organic matter instead of producing its own nutrients or obtaining nutrients from inorganic sources. Consumers are also called heterotrophs, or other-feeders Producers
Producers: Producers are organisms that get their energy directly from the Sun. Their cells are able to turn sunlight into food through a process called photosynthesis. Organisms, such as humans, take in "substrates" such as glucose, in our food. During a process called respiration, we react 4these substrates with oxygen to give carbon dioxide and water; this takes place in the mitochondria of our cells.
plz help will mark brainliest if correct! If the sum of all chemical reactions taking place in an ecosystem results in an overall change in free energy of −9732 kJ, which of the following best describes the impact this will have on the ecosystem?
The amount of energy available to do work will increase.
The ecosystem will move away from equilibrium.
The energy given off as heat to the surroundings will decrease.
The entropy of the ecosystem will increase.
Answer:
I think the entropy of the ecosystem will increase.
What figurative term is "merry hell"?
onomatopoeia
personification
oxymoron
hyperbole
How do you think Nucleic Acids and Proteins work together in the body? Why are they both important to humans?
Explanation:
protein is the element responsible for building up of cells and the nucleic acid is embedded in the cell, so protein builds the whole cell including the nucleic acids.. the nucleic acid is also packed by histones which is a proteinous structure. both are important because, in the cell all organelles require protein for their growth and likewise the encoding of the genetic information carrier
how is the mitochondrial DNA (mtDNA) transferred from generation to generation.
Answer:
maternal mtDNA
Explanation:
While nothing but the haploid nucleus remains of the sperm during fertilisation, the ovum still has its mitochondria and other organelles. Mitochondria are capable of division and will divide according to cell's needs.
So it is the maternal mtDNa that gets passed on. Spontaneous mutations can happen at any point ofcourse and get passed on in the same way.
WHAT ARE SOME DEFENSE MECHANISMS SPECIES USE TO WARD OFF OTHER SPECIES?
Types of animal defense mechanisms
Contents
2.1 Startling the predator.
2.2 Pursuit-deterrent signals.
2.3 Playing dead.
2.4 Distraction.
2.5 Mimicry and aposematism.
2.6 Defensive structures.
More than 2000 years ago, the Greek philosopher Aristotle classified
organisms into plants and animals,
He placed all animals into 3 groups:
• land dwellers
• water dwellers
• air dwellers
In addition, he placed all plants in 3 different groups based on differences in
their stems:
herbs
· shrubs
• trees
What was the most likely reason that this system eventually changed?
.
.
A)Aristotle's method was too specific.
B)Two thousand years ago, no one accepted classifying organisms into plants and animals.
C)Many organisms were placed in groups to which they had no real relationship with the other
members of the group.
D)All organisms containing chlorophyll belonged in the same kingdom.
Answer:
C
Explanation: