Answer:
Explanation:
Epigenetic inheritance is deals with the
study of the chemical modification of some genes or gene that are associated with proteins of an organism. An example of epigenetic is
Methylation it can either change rapidly during the life span of an organism or can be permanent if set early in the development of the embryo.
Epigenetic modifications are heritable, and can be passed from parents to offspring through genetic inheritance or passed down through multiple generations via transgenerational epigenetic inheritance.
How does a bacterium compare to a frog at the cellular level?
Answer:
Bacterium is prokaryotic while frog is eukaryotic, also Bacterium is unicellular while frog is multicellular
Explanation:
Bacteria can be considered unicellular prokaryotic organisms, whereas a frog is a multicellular eukaryotic organism.
What are prokaryotic cells?Prokaryotic cells are specific cells that do not have a cell nucleus and also lack membrane-bound organelles.
Conversely, eukaryotic cells contain organelles and the genetic material is compartmentalized in the nucleus.In conclusion, bacteria are unicellular prokaryotic organisms, whereas a frog is a multicellular eukaryotic organism.
Learn more about prokaryotic cells here:
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describe the three general methods used by ecologists to study organisms
Answer: The three main research methods used are observation, modeling, and experimentation.
Explanation:
Observation:
Every experiment requires observation. Ecologists must observe the environment, the species within it, and how those species interact, grow and change. Different research projects different types of assessments and observations.
Ecologists sometimes use a desk-based assessment, or DBA, to collect and summarize information about specific areas of interest. In this scenario, ecologists are using information already collected from other sources.
Oftentimes, however, ecologists rely on observation and fieldwork. This entails going into the habitat of the subject of interest to observe it in its natural state. By doing field surveys, ecologists can track the population growth of species, observe community ecology in action and study the impact of any new species or other introduced phenomena in the environment.
Each field site will differ in nature, shape, or other ways. Ecological methods allow for such differences so that different tools can be used for observations and sampling. It is crucial that sampling be done randomly to combat bias.
Modeling:
Ecological methods rely heavily on statistical and mathematical models. These provide ecologists with a way to predict how an ecosystem will change over time and react to changing conditions in a system.
Modeling also provides another way to decipher ecological information when fieldwork is not practical. There are several drawbacks to relying solely on fieldwork. Because of the typically large scale of fieldwork, it is not possible to replicate experiments exactly. Sometimes even the lifespan of organisms is a rate-limiting factor for fieldwork. Other challenges include time, labor, and space.
Modeling provides a method in which to streamline information more efficiently.
Examples of modeling include equations, simulations, graphs, and statistical analyses. Ecologists use modeling for producing helpful maps as well. Modeling allows for calculations of data to fill in gaps from sampling. Without modeling, ecologists would be hampered by the sheer amount of data that needs to be analyzed and communicated. Computer modeling allows for comparatively rapid analysis of data.
A simulation model, for example, enables the description of systems that would otherwise be extremely difficult and too complex for traditional calculus. Modeling allows scientists to study coexistence, population dynamics, and many other aspects of ecology. Modeling can help predict patterns for crucial planning purposes, such as for climate change.
Humanity’s impact on the environment will continue. It, therefore, becomes ever more crucial for ecologists to use ecological research methods to find ways to mitigate the effects on the environment.
Experimentation:
The overarching purpose of ecological methods for research is to get high-quality data. Experiments must be carefully planned.
Hypothesis: The first step in any experimental design is to come up with a hypothesis or scientific question. Then, researchers can come up with a detailed plan.
Factors that affect fieldwork experiments include the size and shape of an area that needs to be sampled. Field site sizes range from small to very large, depending on what ecological communities are being studied. Experiments in animal ecology must take into account the potential movement and size of animals.
For example, spiders would not require a large field site for study. The same would be true when studying soil chemistry or soil invertebrates. You could use a size of 15 meters by 15 meters.
Herbaceous plants and small mammals might require field sites of up to 30 square meters. Trees and birds might need a couple of hectares. If you are studying large, mobile animals, such as deer or bears, this could mean needing a quite large area of several hectares.
Deciding upon the number of sites is also crucial. Some field studies might require only one site. But if two or more habitats are included in the study, two or more field sites are necessary.
Tools: Tools used for field sites include transects, sampling plots, plotless sampling, the point method, the transect-intercept method, and the point-quarter method. The goal is to get unbiased samples of a high-enough quantity that statistical analyses will be sounder. Recording information on field data sheets aids in the data collection.
A well-designed ecological experiment will have a clear statement of purpose or question. Researchers should take extraordinary care to remove bias by providing both replication and randomization. Knowledge of the species being studied as well as the organisms within them is paramount.
Results: Upon completion, collected ecological data should be analyzed with a computer. There are three types of ecological experiments that can be made: manipulative, natural, and observational.
Hope This Helps!
The 3 general methods used by ecologists to study organisms include:
ObservationModellingExperimentationObservation involves observing organisms in their natural habitats or environments and then recording the findings. It is usually done by field surveying.
The different species living in an environment, how they interact with each other and other abiotic components of the environment are some of the observations taking during field surveys. The growth of individual species, the effects of introducing new species, their adaptations and other areas of community or ecosystem ecology can be studied through observation.
Modelling requires a simulation of real-life ecological processes through different manipulations. This could be done in the laboratory, on the field, or even on the computer. Computer modelling requires that data from observation or experimentation are supplied as input and the inputs are subject to mathematical maneuvering.
With models, complex ecological processes can be simulated and analyzed and extrapolated to deduce how things might happen in real life ecological interactions.
Experimentation involves setting up experiments following the scientific method. It can be a observational or controlled experiments.
Observational experiments requires studying organisms, populations, communities, or ecosystems through pure observation without changing or manipulating any variable.
Controlled experiments requires that variables are introduced and manipulated in some groups while some groups serve as the baseline without any manipulated variables.
Data are obtained from experiments and these are analyzed in relevant ways to support or reject hypotheses.
More on ecological studies can be found here: https://brainly.com/question/22875048
Which of these does not provide information about the geologic history of Earth?
A) fossils
B) ash from volcanoes
C) debris from meteorites
D) current weather patterns
Answer:
is B
Explanation:
volcanic activity was more common in the past than it is today.
Which of these biological communities has permafrost? A. Tundra B. Grassland C. Desert D Forest
Answer:
the tundra biome :)
Explanation:
grass lands aren't very cold
forests aren't cold
the desert is hot
and tundra is super cold
How do I know how much energy is availably in each level of the energy pyramid?
Answer:
What Exactly Do Energy Pyramids Have to Do With Energy? Energy pyramids show a very cool trend: Each level only gets 10% of the energy from the level below it.
Explanation:
When observing an ECG, you will see many different deflections from baseline known as waves. These deflections represent various electrical events taking place in the heart that give rise to the mechanical events that help move blood. In addition to the waves that can be observed, there are flat lines between waves and successive cardiac cycles called segments that also represent particular electrical events that take place in the heart. Finally, certain combinations of waves and segments, known as intervals, also identify important events recorded by the ECG. Match each of the following events with the correct phase of an ECG. Drag the terms on the left to the appropriate blanks on the right to complete the sentences.
A. P wave
B. ST segment
C. QRS complex
D. PR segment
E. T wave
F. QT Interval
1. Atrial depolarization_____.
2. The ventricles are in their depolarized state____.
3. Total time it takes for the ventricular muscle to depolarize and repolarize____.
4. Ventricular depolarization____.
5. Conduction through the atrioventricular (AV) node____.
6. Ventricular repolarization____.
7. Conduction through the atrioventricular (AV) bundle____.
Answer:
1. Ventricular depolarization −−QRS complex
2. Total time it takes for the ventricular muscle to depolarize and repolarize −−QT interval
3. Atrial depolarization −−P wave
4. Conduction through the atrioventricular (AV) node −−PR segment
5. Ventricular repolarization −−T wave
6. The ventricles are in their depolarized state −−ST segment
7. Conduction through the atrioventricular (AV) bundle −−Q wave
Explanation:
ECG or electrocardiogram is the graphical representation of the heart's rhythm and electrical activity measured by electrical signals. The contraction of the heart shows electrical activity.
There are various deflections shows from baseline and known as specific waves and there are also some flat lines between waves called intervals. This atrial depolarization is called P wave and ventricular repolarization called T wave and the time between ventricular muscles depolarization ( QRS complex) and repolarization is QT interval. Conduction through the atrioventricular (AV) bundle is known as Q wave.
hey guys i need help (for bio) i’ll make you the brainiest and it’s 20 points!
I’ll mark u as brainliest! Tell me what definition goes where ?!
Answer:
Codominance- Two traits are both present in a third phenotype.
Incomplete Dominance- Two traits blend to form a third phenotype.
Sex-Linked Traits- Determined by gene located on sex chromosomes.
Explanation:
I hope this helps.
Move this lichen
to where it belongs within the process of primary succession
Pls help 15 points
Answer:
1
Explanation:
Lichen are usually the first thing to grow on bare rock, making them a pioneer species. Fun fact, you can use lichen to determine if the air quality in an ecosystem is polluted.
Hope this helped :)
21. All the following are differences between arteries and veins
except
arteries are thick and veins are thin
O arteries do not have valves and veins have valves
arteries connect to capillaries and veins do not connect to capillaries
arteries carry blood away from the heart and veins carry blood back to the heart
22. All the following are the 3 major parts of the cardiovascular system
VA
Answer:
Arteries connect to capillaries and veins don't connect to capillaries
Explanation:
Actually both are connected by capillaries
the effects of toxic chemicals are minimized by which following three mechanisms
Answer:
Metabolic degradation, excretion, and repair.
Explanation:
36. In this Phylogenetic tree the newest evolutionary branch is between
(1 point)
dinosaurs and birds
O dinosaurs and frogs
O humans and sharks
O humans and whales
Ehlers-Danlos syndrome is a genetic disorder that weakens the binding properties of connective tissues. What would most likely be one of the symptoms of this disorder?
A.
Increased joint mobility
B.
Decreased brain activity
C.
Decreased bone density
D.
Increased muscle size
Answer:
Increased Joint Mobility
Which is the best way of comparing two or more organisms
A. Homologous structures
B. DNA
C. Vestigial Structures
D. Fossils
Answer:
its b
Explanation:
Why do plant cells need a cell wall and chloroplasts but animal cells do not?
Answer:
Plant cell needs cell wall whereas animal cell do not because the plants need rigid structure so that they can grow up and out . ... So animal cells can have various shapes, but plant cells only have the shapes of their cell walls.
Explanation:
Thats because Plant cell needs cell wall whereas animal cell do not because the plants need rigid structure so that they can grow up and out . ... So animal cells can have various shapes, but plant cells only have the shapes of their cell walls.
HELP ASAP PLZ PLZ
Would the crater size for an impact crater change if it was dropped from 6 meters (18 ft)? Why or why not?
Answer:
yes it would change
Explanation:
lots of factors can contribute like acceleration distance and resistance.
which of tge following is true about Earth's temperatures?
Answer:
Water vapor and clouds are the major contributors to Earth's greenhouse effect
Explanation:
Question 17
Identify the organelle by its function
Creates ATP (energy) and known as the powerhouse of the cell.
What is the answer of the question?
Answer:
A. Amino Acid, protein, gene.
Explanation:
Genomics refers to the scientific study of genes (DNA) found in living organisms such as humans and animals.
A gene can be defined as a complete set of hereditary instructions that is typically found in the deoxyribonucleic acid (DNA).
A nucleotide can be defined as an organic molecule which forms the building block of nucleic acid such as deoxyribonucleic acid (DNA) and ribonucleic acid (RNA).
Simply stated, a sequence of biomolecules which are responsible for coded genetic instructions in all living organisms is known as nucleotides.
Basically, nucleotide comprises of the following parts;
1. Nitrogenous base: this includes adenine (A), thymine (T), guanine (G), and cytosine (C) which are mainly found in the DNA while adenine (A), guanine (G), uracil (U) and cytosine (C) are found in the RNA.
2. A phosphate group.
3. A penrose sugar: it is either deoxyribose in DNA or ribose in RNA.
Furthermore, the two parts or chemical components of a nucleotide which do not change throughout the structure of DNA are;
I. Five-Carbon Sugar also known as deoxyribose and it has hydrogen on its second carbon.
II. Phosphate: this is the structural backbone that provides support to DNA.
Additionally, the proteins which are mainly synthesized based on the genetic instruction codes in deoxyribonucleic acid (DNA) determines the trait of living organisms.
Genome editing can be defined as a high-tech process which avail scientists the opportunity or ability to remove (delete), replace and insert Deoxyribonucleic Acid (DNA) sequence in a living organism such as bacterias, animals, plants etc in order to correct a genetic disorder and to improve on their physical and chemical conditions.
Hence, when you remove a nucleotide from a gene, the order of nucleotides shifts and as such resulting in new amino acid being coded for. These new amino acid will combine to form a different protein than what the gene was originally coded for.
The picture below shows the bone structures of whale and bird.
Picture shows similar bone structures of whale and bird.
Based on the diagram, which of these statements is correct about whales and birds? (2 points)
Group of answer choices
They use their limbs to catch their prey.
They move in the same manner.
They have similar food habits.
I had almost the same question on one of my quizzes but it had one other answer. Mine was,
"The picture below shows the bone structures of whale and bird.
Picture shows similar bone structures of whale and bird.
Based on the diagram, which of these statements is correct about whales and birds?
a ) They have similar food habits.
b ) They move in the same manner.
c ) They share a common ancestor.
d ) They use their limbs to catch their prey."
After doing some research, I found that the correct answer was that they share a common ancestor.
Destin Benning: Attempt 5
Question 6 (2 points) ✓ Saved
According to the base-pairing rules for DNA, which of the following statements is
not true?
A always pairs with T.
C always pairs with G.
Talways pairs with G.
Answer:
T always pairs with G
Explanation:
According to the complementary base pairing rule as postulated by Chargaff, an Adenine base (A) will always hydrogen pair with a Thymine base while Cytosine base (C) will always hydrogen pair with Guanine base (G) in a DNA molecule.
That is; A - T and G - C
Hence, based on the question, the pairing of Guanine and Thymine is incorrect.
Drag the tiles to the correct boxes to complete the pairs.
Match the characteristics with the phylum.
water vascular system
tentacles with stinging cells
molting for growth
the presence of mantle
Arthropoda
Cnidaria
Molluska
Echinodermata
Answer:
Water vascular system = Echinodermata
Tentacles with stinging cells= Cnidaria
Molting for growth= Arthropoda
Presence of mantle= Molluska
Explanation:
What is the bottom layer in the soil?
topsoil
parent rock
humus
subsoil
Answer:
my answer is: subsoil
Explanation:
Answer:
Parent rock, also now as bedrock
Explanation:
What is the sequence of amino acids formed from this gene?
Listen to pronunciation. (uh-MEE-noh A-sid SEE-kwents) The arrangement of amino acids in a protein. Proteins can be made from 20 different kinds of amino acids, and the structure and function of each protein are determined by the kinds of amino acids used to make it and how they are arranged.
Bats and birds eating insects at different times of day is an example of (1 point)
O survival of the fittest.
O resource partitioning.
O competitive exclusion.
O natural selection.
Bats and birds eating insects at different times of day is an example of Resource Partitioning. So, the correct option is B.
What is Resource Partitioning?
Resource partitioning or niche differentiation is a process of natural selection that will force competitors to use resources differently in such a way as to avoid competition between species. Resource partitioning causes the co-existence of species.
If bats and birds eat insects at different times of the day, there is no survival of the fittest. Competitive exclusion states that no two species can co-exist in the same niche for a long time.
Therefore, bats and birds eating insects at different times of day is an example of Resource Partitioning.
To learn more about Resource Partitioning, refer to the link :
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what's the importance of microscope in the study of animal
Answer:
It is important because biology mainly deals with the study of cells, genes, and all organisms. Some organisms are so small that they can only be seen by using very strong magnifications, which can only be achieved by a microscope.
14. Scientists use models of earthquakes to (5 points)
O change their location
O stop them from occurring
O understand the process
O increase the waves formed in the process
Answer:
under stand the process
Explanation:
i took the test
goodluck to people taking it
Large molecules that are built from repeating smaller molecules called
(Insert first answer) are called (insert second answer)
Answer:
The first answer would be a polymer and the second answer would be a monomer.
4. In a prairie ecosystem, nitrogen and other matter builds up in animal
wastes. Which organisms return this matter to the ecosystem by
breaking down wastes?
Answer:
Fungi, insects, and earthworms
Explanation:
They decompose wastes, returning nitrogen back to the ecosystem.
In what process does cross over occur
Answer: Crossing over is a biological occurrence that happens during meiosis when the paired homologs, or chromosomes of the same type, are lined up.
Explanation: