Complete question:
Three types of threats to biodiversity are:
habitat loss and fragmentation the introduction of exotic, or non-native, species overexploitation, or overharvesting.
Determine the type of threat that each of the following statements describes.
1. a wetland is drained to make room for a housing development.
2. south american rodents called nutria eat wetland plants and cause bank erosion in the united states.
3. some fishing nets damage the seafloor.
4. melaleuca trees from australia displace native wetland vegetation in florida.
5. small rainforest remnants have less diversity than larger rainforest remnants.
6. cod are caught faster than they can reproduce.
7. florida panthers were geographically cut off from other panthers about 100 years ago.
8. wild american ginseng populations have declined as a result of increased demand for the roots.
Answer:
1. a wetland is drained to make room for a housing development.--> habitat loss and fragmentation
2. south american rodents called nutria eat wetland plants and cause bank erosion in the united states.--> introduction of exotic, or non-native, species
3. some fishing nets damage the seafloor.
--> overexploitation, or overharvesting
4. melaleuca trees from australia displace native wetland vegetation in florida.
--> introduction of exotic, or non-native, species
5. small rainforest remnants have less diversity than larger rainforest remnants.
-->habitat loss and fragmentation
6. cod are caught faster than they can reproduce.
--> overexploitation, or overharvesting
7. florida panthers were geographically cut off from other panthers about 100 years ago.
--> habitat loss and fragmentation
8. wild american ginseng populations have declined as a result of increased demand for the roots.--> overexploitation, or overharvesting
Explanation:
Habitat loss and fragmentation. Refers to the effects of human activities and their expansion in space as populations get bigger and economic activities increase. The expansion of agriculture and cattle industry limits are one of the most important activities responsible for habitat fragmentation. In the last few years, the real estate industry took an important role in habitat fragmentation and alteration. Following this idea of "progress", government and private enterprises alter the natural and pristine environment and open new areas destined for different activities, in most cases contaminating the area. A progressive and continuous change occurs in the natural environment. Following the reduction of habitat, there is a decrease in the size of populations of the affected native species. The species richness decreases, and there is no connection or paths among isolated areas.The introduction of exotic, or non-native, species. Refers to biological invasions. New species that establish in a new area far or out of their original distribution range. These species might be considered exotic or invasive, according to their reproductive rate, population growth, and interaction with native species. Once established, the introduced species expand their distribution from the first invaded spot and overgrows. It is very common for these species to start new populations in the new area, where they have less environmental pressure and better conditions than in their origin area -fewer predators, more resources, better nitches-, and these factors favor their establishment. As they expand, they compete with other species for resources. In the case of plants, these resources are water, place, radiation, exposure, among others. Species are considered to be invasive because of their reproductive rate, population growth, and interaction with native species, which provokes huge damages in the native ecosystems. Biologic invasions are natural processes, that occur in small groups of individuals that can expand to other ecosystems, and the appearing or despairing of barriers promotes their expansion. But these biologic invasions have accelerated by human beings, referring to this as "human-assisted invasions". These are the cases in which men transport species from one place to the other for different uses or purposes. It is very common for these species to scape and start new populations in the new area, where they have less environmental pressure -fewer predators, more resources, better nitches- than in their origin area, which favors their establishment. Overexploitation, or overharvesting. Refers to the unlimited use of resources. People, acting by their own needs or interests, may exceed the harvesting, affecting the resource population and, therefore, other users. Overexploitation might lead to the extinction of the species that are taken in excess and to the decrease in the size of other organism´s populations that also depend on those resources.Which of the following is more typical of an animal skeleton?
A.the sacrum consists of 5 fused bones
B.has a broad foot
C.has a chin
D.the femur is the longest bone
Which of the following organelles would be affected first if there were no lipids present to allow nutrients to enter the cell and waste to be removed from the cell?
a. cell wall
b. endoplasmic Reticulum
c. golgi body
d. cell membrane
PLEASE I NEED THIS ASAP !!!
Answer:
cell wall will be affected
Please help me on this history please I’m begging also it’s number one not number 2
Answer:
3 Or 2 I think?
Explanation:
So Sorry If It isn't right!
Answer these 5 questions please
Describe how the following would change if you were to extend your arm at the elbow (that is, stretch the biceps).
a) the length of the muscle spindles in the biceps muscle
b) the firing of muscle-spindle afferents from the biceps muscle
c) the firing of alpha motor neurons that project to biceps muscle extrafusal fibers (assume you are trying to hold your arm in place.)
Answer:
a. The biceps would relax causing it to increase in length
b. The firing of the muscle-spindle afferents from the biceps would decrease.
c. The alpha motor neurons would contract or decrease.
Explanation:
The skeletal joints in the human or animal body are controlled by muscles. Examples of these muscles are the biceps and triceps found in the human arm. They control the elbow joint with the biceps in front and triceps at the back of the elbow.
When the arm is extended from the elbow, the biceps relaxes or extends while the triceps contracts. This increases the length of the biceps and reduces the triceps length.
We have that for the Question "Describe how the following would change if you were to extend your arm at the elbow (that is, stretch the biceps)"
Answers:
A) Muscle spindles are receptor existing in the muscle which feel the charge of exchange of size of muscle as properly as the size of muscle fibres. These are receptor existing in spiral structure around the intrafusal fibres. When muscle fibres are stretched that is stretching of extrafusal fibres motives simultaneous stretch of intrafusal fibres and so the stretch of muscle spindles due to the fact muscle spindles are current parallel to the extrafusal fibres. Therefore the spindle size enlarge when muscle size is increased.B) when we lengthen our arm at elbow ,the biceps size amplify which stimulate the muscle spindles . This stimulation is essential due to the fact the activation of muscle spindles initiates the afferent impulse which contains data to the brain and overstretching of the muscle is averted . To forestall overstretching ,Motor fibres are activated which contract the muscle . So firing od muscle spindles increases.C) the firing from the alpha motor neurones is extended due to the fact to preserve arm in region we need to observe pressure at elbow joint . There for this voluntary muscle contraction alpha motor neurones firing increases.
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Diversity occurs in many places in meiosis. In what process is the first place where the pieces of DNA switch positions with the homologous sister chromatids?
A. Interphase
B.Independent Assortment
C. Crossing Over
D.Anaphase
E. Randomness of egg and sperm meeting
Answer:
crossing over
Explanation:
I had it on a bio exam. i got it right
Explain why emerging efforts are focused on reducing health risks from exposure to chemicals rather than completely
eliminating those risks.
Answer:
Working with all chemicals carries some level of health risk, and modern society is dependent upon thousands of chemicals to maintain our standard of living. Therefore it is not reasonable to eliminate all chemical related health risks because that would require we stop using chemicals like cleaning supplies, gasoline, and fertilizers. The more practical approach is to minimize and manage the health risks associated with chemical exposure.
Explanation:
answer on edge
Answer:
This is the example answer they give you
Explanation:
Working with all chemicals carries some level of health risk, and modern society is dependent upon thousands of chemicals to maintain our standard of living. Therefore it is not reasonable to eliminate all chemical related health risks because that would require we stop using chemicals like cleaning supplies, gasoline, and fertilizers. The more practical approach is to minimize and manage the health risks associated with chemical exposure.
Ann is looking at the night sky. There is a first-quarter moon. What does she
see? *
a moon shaped like a crescent
a moon shaped like a half circle
a moon shaped like a circle, shining brightly
no moon in the sky
Answer:
A Moon shaped like a half circle
Explanation:
Answer:
a moon shaped like a half circle
Explanation:
If a portion of a mRNA molecule contains the base sequence A-A-U, what
will be the corresponding anti-codon on the rRNA?*
A-A-U
G-G-T
OT-T-A
U-U-A
In RNA:
Adenine(A) binds with uracil(U)
therefore for A-A-U the corresponding anticodon will be U-U-A
The pointed or elongated stains that radiate out from the central area of a bloodstain
are called
O1) satellite spatters
O 2) spines
O3) strings
O4) sprays
Answer:
answerbis 2) spines
hopes this help u
Answer:
it would be called spines or blood tails.
would an electric eel be able to shock predators if its cells run low on ATP?
Answer: no.
Explanation:
The Rh factor is also known as the
antigen.
A. monoclonal
B. polyclonal
C. D
D. X
E. AB
Answer:
Explanation:
Option E is the correct answer
Answer:
C. D
Explanation:
RBCs that are Rh positive express the one designated D (RhD antigen).
-TheUnknownScientist
Which of the following is NOT part of the cell theory?
Group of answer choices
where are the answers????
Zacharias Jansen was known for being a spectacle maker and is credited with making the 1st
microscope.
True or False?
Answer:
True
Explanation:
Zacharias Jansen was known for being a spectacle maker and is credited with making the 1st microscope!
A scientist is developing a potential treatment for cancer. She grows cells in hundreds of petri dishes and exposes the dishes to environments that are known to cause cancer. After exposure, the scientist determines that some of the petri dishes have cancer cells.What factor do all the petri dishes that contain cancer cells have in common?
Answer:
they are normal mutations you can never have a cure to cancer you would have to throw a lot of your DNA and genes away to have a less chance of dying but we could slow or kill cancer but no way to prevent it from happning as it happens everyday to you but those cells have a higher chance to become cancer becuase of those thing that help cells to become cancer.
Explanation:
Question 10
A new type of plant was discovered on a newly-formed volcanic island. The island is hunc
miles away from the mainland. Which hypothesis best explains how the plant arrived?
o It was carried there by wind or waves.
O It spontaneously generated.
O It was carried there by humans.
O It was already present in volcanic materials.
true or false , the mRNA codon UGG is the only codon that codes for the amino acid tryptophan
Answer:
true
Explanation:
Which describes a eukaryotic cell, but not a prokaryotic cell?
A: is surrounded by a cell membrane
B: makes and uses proteins
C: contains DNA in a nucleus
Answer:
c?
Explanation:
eukaryotes have a nucleus and prokaryotes do not
Answer:
C.) Contains DNA in a nucleus
Explanation:
There are several differences between the two, but the biggest distinction between them is that eukaryotic cells have a distinct nucleus containing the cell's genetic material.
what is meant by the term VO2 max
Answer:
VO2 max is the maximum volume of oxygen you can consume per minute per kilogram of body weight at your maximum performance. VO2 max is an indication of aerobic fitness and should increase as your level of fitness improves.
Answer:
VO2 is the maximum oxygen uptake.
Explanation:
VO2 is the maximum oxygen consumption during incremental exercise.
Brainliest Which of the following best explains how most plants grow? *
Plants store the excess oxygen they produce, resulting in them gaining mass
Plants store the excess glucose they produce, resulting in them gaining mass
Plants store the excess carbon dioxide they produce, resulting in them gaining mass
Plants store the excess water they produce, resulting in them gaining mass
Answer:
plants store the glucose they produce, resulting in them gaining mass. that should be the correct answer
Which organelle is used for transportation?
A.nucleus
B. Golgi bodies
C. Cell membrane
D. Endoplasmic reticulum
What structure is found in viruses but not in cells?
The structure is found in viruses but not in cells is - Capsid, made up of protein around the virus but not present in cells.
Viruses are considered non-living as these are molecules neither these are cells nor they are made up of cells. They do not have any traits of the living organism.
They have genetic material which is RNA.The genetic material of Viruses is enclosed in the protein structure or coat called Capsid.they can not reproduce on their own.Cells have various cell organelles and cell structures such as cell walls, mitochondria, cell membrane, genetic material, and many more but lack protein coat or capsid around them but are made up of cells or a single cell.
Thus, the correct answer is - protein capsid.
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A healthy lifestyle is important because _______.
Answer:
A healthy lifestyle is important because it can help prevent chronic diseases and long-term illnesses.
Answer:
a.
people cannot control their genetic traits
Explanation:
just took the test
Which type of speciation is based on a small number of individual being
introduced into a new environment?
Answer:
peripatric speciation
Explanation:
When small groups of individuals break off from the larger group and form a new species, this is called peripatric speciation
The graphs show the reaction rate for an enzyme across a range of temperatures and pH. Based on these data, this enzyme functions best at what temperature and pH? *
The graph is attacged and the options is as follows:
Temperature of 27oC and a pH of 4
Temperature of 37oC and a pH of 6
Temperature of 40oC and a pH of 8
Temperature of 50oC and a pH of 10
Answer:
The correct answer would be - temperature of 37oC and a pH of 6
Explanation:
The graph 1 shows the relation between the rate of reaction for an enzyme and the temperature of reaction is been represented. In this graph the rate of eaction is highest (point from the slope starts decreasing) at the So, by the options and graph the temperature 37°C(Below 40°C) rate of reaction is maximum.
Similarly, in other graph rate of reaction and and pH has been represented in which rate of reaction is maximum at pH 6. after 6 pH the rate of reaction started decreasing.
What is the definition for a Cyclone
Answer:
Cyclone: a system of winds rotating inward to an area of low atmospheric pressure, with a counterclockwise (northern hemisphere) or clockwise (southern hemisphere) circulation; a depression.
Answer:
a system of winds rotating inward to an area of low atmospheric pressure, with a counterclockwise circulation.
Explanation:
Approximately how many molecules of ATP are produced by substrate-level phosphorylation during the complete oxidation of a molecule of glucose (C6H12O6) in aerobic cellular respiration?
Approximately, there are four molecules of ATP are produced by substrate-level phosphorylation during the complete oxidation of a molecule of glucose (C6H12O6) in aerobic cellular respiration.
What is Cellular respiration?Cellular respiration may be defined as a type of biological process that significantly involves the breakdown of food in the cell with the liberation of energy.
In a more simple sense, it is a process of transforming glucose into a form of energy that is known as ATP which is utilized by cells in order to accomplish metabolic and cellular activities.
Two molecules of glyceraldehyde-3-phosphate are formed from one molecule of glucose. Each molecule of G-3-P is responsible for the formation of 2 ATP during the process of substrate-level-phosphorylation.
Hence, a total of four ATPs are produced via the reaction that is known as substrate-level phosphorylation.
Therefore, the number of ATPs that are produced by substrate-level phosphorylation during the complete oxidation of a molecule of glucose is four.
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If a de-shelled egg gains weight after being soaked in sucrose solution, what term best describes this solution?
Answer:
The correct answer would be - hypotonic solution.
Explanation:
The egg cell contains more solute than the sucrose solution which makes the sucrose solution a hypotonic or low solute solution. Hypotonic solution is a solution that has low concentration of the solutes than the another solution. This tye of case leads to the movement of the water to, move in the area of high concentration of solutes.
In this case the water will move in to the egg and swell the egg due to the diffusion of water through semipermeable membrane from low solute area to high solute area.
Convection is the movement of material that distributes heat in the Earth's mantle. What arrangement of material may lead to convective motion?
A. Denser material on top of less dense material
B. Less dense material on top of denser material
C. Mixed material with a uniform density
D. Mixed material with a uniform temperature
Answer:
it is less dense on top of denser material. B
Answer:
A. Denser material on top of less dense material
Explanation:
Took a quiz and got it right.
What happens when a nerve impulse reaches the end of a neuron?
A. Neurotransmitters are released and bind to receptors on the next
neuron, causing potassium ions to move into the neuron.
B. Potassium ions are pumped into the synapse, creating an action
potential at the next neuron.
C. The nerve impulse stops.
D. Potassium ions cause the synapse to close, allowing the impulse
to pass directly to the next neuron.
Answer:
A, the answer is A.
Explanation:
When a nerve impulse reaches the end of an axon, the axon releases chemicals called neurotransmitters. Neurotransmitters travel across the synapse between the axon and the dendrite of the next neuron. The binding allows the nerve impulse to travel through the receiving neuron.
Hope this helps! :D
Neurotransmitters are released and bind to receptors on the next neuron, causing potassium ions to move into the neuron when a nerve impulse reaches the end of a neuron.
What is the neurotransmitters?It is the messengers in the body which transmit the messages from one nerve impulse across synapse. It is also called chemical messengers.
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