Answer: B
Explanation:
The Galapagos tortoises became separate species because they were on different islands. This is an example of geographic isolation, where the separation of physical barriers (in this case, different islands) prevents gene flow and leads to the divergence of populations and the eventual formation of new species
The total number of individuals of a species worldwide
Answer:
8.7 million - plus or minus about a million
Explanation:
"The approach accurately predicted the number of species in several well-studied groups such as mammals, fishes and birds, providing confidence in the method
The Smokey the Bear campaign attempted to suppress and eliminate wildfires from forested areas altogether. Explain how fire suppression can negatively impact the health of a forest ecosystem?
A. Suppression allows weaker, more vulnerable trees that would have been weeded out by fire to survive.
B. Suppression leads to less diversity of tree species, so beetles spread more quickly between trees.
C. Suppression leads to equal/even-age stands of mature trees, which the beetles prefer.
1. Naturally occurring wildfires are most frequently caused by lightning
2. NATURAL forest fires can temporarily increase fertility of a region
3. burning process releases nutrients which then fertilize the soil.
3a. fire chemically converts nutrients bound in dead plant tissues and the soil surface to more available forms
3b. fire indirectly increases mineralization rates through its impacts on soil microorganisms (Schoch and Binkley 1986).
4. slash and burn process successfully clears land for agriculture and introduces fertilizing nutrients into the soil, leaving it in excellent condition to grow crops.
AP ENVIRONMENTAL SCIENCE
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which of the following is a cause of a DNA mutation?
pls help i dont get it question is above
Answer:
A. Cell wall and chloroplast
B. Nucleus (the dark grey circle)
Explanation:
Look on the box that says ‘show genotype’. What is the genotype of the offspring
Most skin, hair, and nail fungal infections (including ringworm) are caused by ______.
Select one:
a.
dermatophytes
b.
viruses
c.
prokaryotes
d.
bacteria
Answer: it's a.
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What happens to the trees in the taiga as global temperatures rise?
They grow bigger and use more resources.
They lose their needles in the winter.
They grow farther up the mountains.
They grow farther down the mountains.
Answer:
C
Explanation:
because they grow more than others time
Describe how an enzyme’s shape changes as it binds to its substrate. Describe a condition under which an enzyme might to be able to bind to its substrate.
The enzyme’s shape changes as it binds to its substrate because enzymes are highly specific, the main reason for enzyme’s shape changes as it binds to its substrate is temperature, pH and time.
Why an enzyme is so specific for its substrate?Is due to the fact that the enzyme's active site has a complementary format to its substrate, promoting a contract, like a key that fits perfectly in a given fixation.
Substrate is the reagent on which an enzyme acts. When an enzyme binds to its substrate, the enzyme-substrate complex is formed. This binding takes place in a specific region, called the active site.
One exemple of an enzyme changing it's shape to binds to a substrate is pepsine. Pepsine changes it's shape to bind to proteins in the stomach and break them down into smaller peptides.
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What happens when a coral pushes out the algae that live there?
coral cooling
coral bleaching
algae bloom
coral warming
Which fossil fuel needs to migrate into
pockets in order for humans to extract it
from the ground?
A. gold
B. aluminum
C. petroleum
D. uranium
Answer:
LA RESPUESTA ES LA C) PETROLEUM
Explanation:
LA C) ES PORQUE SEGUN YO ES DE ACUERDO EL TEXTO AUE HAS MANDADO EN TU TAREA
What is the only cephalopod with an external shell?
A. nautilus
B. cuttlefish
C. squid
D. octopus
Answer:
the only cephalopod with an external shell is A. nautilus
Answer:
a. nautilus
Explanation:
Nautiluses are the only cephalopod with an external shell.
What type of plants contain two cotyledon?
A. Dicots
B. Monocots
C. Unicots
D. Multicots
Answer:
A. Dicots
Explanation:
A monocot, which an abbreviation for monocotyledon, will have only one cotyledon and a dicot, or dicotyledon, will have two cotyledons.
Which of the following are an advantage and disadvantage of hydrogen energy use?
Advantage: Hydrogen is easy to store.
Disadvantage: Hydrogen is scarce.
Advantage: Hydrogen allows for zero emissions.
Disadvantage: Hydrogen is difficult to store.
Advantage: Hydrogen is an efficient form of energy.
Disadvantage: Hydrogen allows for pollution to be emitted.
Advantage: Hydrogen fuel has established infrastructure.
Disadvantage: Hydrogen is scarce.
The following are an advantage and disadvantage of hydrogen energy use and is denoted as option B.
Advantage: Hydrogen allows for zero emissions.Disadvantage: Hydrogen is difficult to store.What is Hydrogen?This is an element with a atomic number of 1 and exists as a colorless flammable gas.
It has to be liquefied which is why it is difficult to store and allows for zero emissions which makes it a clean source of energy.
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Name the labeled structure
ASAP PLS There are lots of big words in genetics! One way to start thinking about the process of meiosis is to ask yourself some questions.
If two parents are contributing genetic material to their offspring, why don’t the genes and chromosomes double in each generation?
If each parent has two sets of genes and chromosomes, why do their offspring receive only one set from each parent?
Answer:
1) the genes and chromosomes do not double after each generations because parental sex cells are haploid and only contain one set of chromosomes. During fertilization the two cells fuse to form a diploid zygote with two copies of genes and chromosomes. For example a normal human has 46 chromosomes (2 copies of 23 chromosomes) during reproduction gametes which contain 23 chromosomes (haploid) fuse to form an offspring with the correct number of chromosomes ( 23 + 23 = 46).
2) offspring only receive one set of chromosomes from each parent so to maintain the chromosome number of humans. If this did not happen you would not be the same species.
The hydrogen ion reservoir is located in the ____________________ and ATP synthesis occurs in the ____________________. In order to facilitate reproduction, independent of cell division, both of these organelles have _________________________ and _________________________.
In which situation is work being done?
A. A woman lies on the ground.
OB. A boy stands on a chair.
C. A man pushes against a wall.
OD. A girl throws a ball.
Front legs of a cat and the arms of a human share a bone structure
Answer: It will be a homologous
Explanation:
what do we call the outer layer of the nucleas?
At present, only a very small proportion of genetically modified foods must be labelled. Some consumer advocates are urging the federal government to label all foods that contain genetically modified material, so that consumers may choose whether to purchase them or not. What are you views?
Genetically modified material is safe it was proven a ton of times no need to worry sometimes its even healthier than normal food.
Why are microorganisms used to produce enzymes?
If possible, focus on the production of pharmaceutical enzymes via microorganisms, but a general explanation is sufficient as well.
Microorganisms produce enzymes in order to break the macromolecules such as proteins and starches.
Why are microorganisms used to produce enzymes?
Microbial enzyme production occur to degrade natural polymers such as proteins, starches, or pectin. The microorganisms secrete the enzymes in order to extract nutrients from it.
So we can conclude that Microorganisms produce enzymes in order to break the macromolecules such as proteins and starches.
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Explain the scientific interpretation of the fossils found in the cradle of humankind.
The scientific interpretation of the fossils found in the cradle of humankind,
The Cradle of Humankind region comprises 15 major fossil sites, some of which date back 5-million years.
The name Cradle of Humankind reflects the fact that the site has produced a substantially large number of hominin fossils, some the oldest ever found, dating as far back as 3.5 million years ago.
How was the Cradle of Humankind formed?The Cradle of Humankind Site comprises a strip of a dozen dolomitic limestone caves including the fossilized remains of ancient forms of animals, plants and most notably, hominids. The dolomite in which the caves formed, started out as coral reefs flourishing in a worm shallow sea about 2.3 billion years ago.
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describe the effects of altitude and latitude on the distribution of biomes
Answer:
As latitude and altitude increase, biomes and vegetation change. Trees of tropical rainforests usually grow closer to the equator, while mosses and lichen of the tundra grow closer to the poles.
Latitude determines the amount of sunlight received. The amount of sunlight and the amount of moisture received determines the ecosystem or biome. Biomes are partly determined by altitude. More precisely, biomes are mainly determined by temperature and precipitation, and the altitude can affect both temperature and precipitation. The temperature drops as the altitude increases. This would alter the structure and composition of our biome.
what is the primary distinction of being an animal?
A) ability to reproduce
B) having a backbone
C) ability to digest
D) ability to turn sunlight into energy
Answer: A) ability to reproduce
Explanation:
One would expect well-drained soils to have the highest organic matter contents where the climate is?
One would expect well-drained soils to have the highest organic matter contents where the climate is cool and humid.
What is organic matter?Reducing or eliminating tillage, which triggers a microbial action burst that hastens the decomposition of organic matter and raises erosion. Reduce erosion by taking the necessary action. SOM is mainly found in topsoil.The topsoil is the soil's topmost layer. The majority of the biological soil activity on Earth takes place there because it has the highest concentration of organic materials and bacteria.The topsoil is where most of the biological activity in the soil takes place and has the highest concentration of organic matter and nutrients. Without residue or living cover, soil is vulnerable to erosion.Histosols are soils that are rich in organic materials and unbroken plant matter.
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Energy is stored in biological molecules like carbohydrates, lipids and nucleic acids (ATP).
Describe how different forms of energy are converted at least three different ways in an autotroph.
ATP can be hydrolyzed to ADP and Pi by the addition of water, releasing energy. ADP can be "recharged" to form ATP by adding energy, combining with Pi in a process that releases a water molecule.
Where the energy of ATP?As energy is released, they form ATPs, binding phosphate to ADP. So the energy is in ATP. The process of binding phosphate to ADP is called oxidative phosphorylation.
There are three common energy-producing processes for making ATP:
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What does longitude tell you?
A. How far south you are
B. How far north you are
C. How high up you are
D. How far east you are
Answer:
D
Explanation:
longitude, coordinate system by means of which the position or location of any place on Earth’s surface can be determined and described.
if it is lined from north to south it measures east to west that is why i say d
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what is the difference between pressure potential and solute potential and give the formula for water potential
how can a mutation in a gene lead to a new trait in organism?
Answer: The mutation gene codes for a protein that causes a new trait.
Explanation:
Which source of renewable energy is the most location-dependent in its production?
hydroelectric
geothermal
wind
solar