Animal life changed greatly during the Cambrian explosion, with some groups expanding in diversity and others declining. What are the current hypotheses that explain these trends?
A. Global climate changes.
B. Atmospheric changes.
C. Predator prey relationships.
D. Appearance of the marine top predator.
E. Changes in the regulations of develop.
F. Radiation of numerous terrestrial groups.
Answer: Options A,B,C, and F
A. Global climate changes.
B. Atmospheric changes.
C. Predator-prey relationships.
F. Radiation of numerous terrestrial groups.
Explanation:
Due to increasing natural disasters (such as volcanic eruption) and arthropological activities (such as mining) that led to the emission of harmful gases, changes in the atmosphere and overall climatic conditions is established.
They saturate the atmosphere and due to limited carbon sinks to absorb them, they alter the climatic parameters like temperature, rainfall, and relative humidity.
The effects of change in climatic parameters are flooding, habitat destruction, increased predation, and among others. Thus, leading to dispersal of some animal species and decline of many others.
Predator-prey relationship also plays an important role in the expansion (likely through migrating from danger) and in most cases decline of some animal species, especially when there's limited prey species to go round for the predators.
Name the gas. 1. Used in respiration 2. Produced in respiration 3. Used in photosynthesis 4. Produced in photosynthesis
Answer: Oxygen
Explanation:
Explanation:
The fixation or reduction of carbon dioxide is a process in which carbon dioxide combines with a five-carbon sugar, ribulose 1,5-bisphosphate, to yield two molecules of a three-carbon compound, glycerate 3-phosphate, also known as 3-phosphoglycerate.
MAY IT HELPS U MATE
What are the products of photosynthesis?
O A. C2H4O2 and H20
O B. C2H4O2 and 02
O C. C6H1206 and H20
O D. C6H1206 and 02
:)
Answer:
c
Explanation:
am not really sure but the c6h12o6 actually stands for glucose
Explain why spring tides are higher than all other tides.
Answer:
In both cases, the gravitational pull of the sun is 'added' to the gravitational pull of the moon on Earth, causing the oceans to bulge a bit more than usual. This means that high tides are higher and low tides are lower than average. These are called 'spring tides.
Explanation:
Fun facts:
Why are the spring tides the highest tides each month? Twice each month, the moon, sun, and Earth are aligned, so the pulling forces are combined to produce the highest and lowest tides, called spring tides.
which of the following observations led mandel to conclude that some traits were recessive?
Answer:
D
Explanation:
que es el arte rupestre
Answer:
Explanation:
El arte rupestre es todo aquel dibujo o expresión artística prehistóricas que se hallan impresas en rocas y cavernas, ya que el hombre de este tiempo plasmaba allí su arte y desarrollaba gran parte de su vida en estas cuevas para refugiarse de depredadores y de las inclemencias climáticas.
▪️Chapter - The fundamental unit of life
▪️Quality answer needed
▪️No Copied answer ( This type of answer will be reported at spot)
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Answer:
The difference between Prokaryotic cell and Eukaryotic cell are;
[tex]\begin{array}{lll}&\underline {\text {Prokaryotic}}& \underline {\text {Eukaryotic}}\\ \\ \text {Nuclear \ membrane \ and \ nucleus} & \text {No \ true \ nucleus \ or} & \text {Has \ a \ true \ nucleus} \\& \text {nuclear \ membrane} & \text {nucleoli \ and \ nuclear \ membrane}\\\\ \text {Membrane \ bound \ cell \ organelle} & \text {None &Present} \\\\ \text {Chromosome \ number \ and \ shape} & \text {One} & \text {Several, more \ than \ one} \end{array}[/tex]
Explanation:
Prokaryotic cells
The plasma membranes surround prokaryotic cells, however, within their cytoplasm, there are no organelles bound to the membrane and there is no nucleus in the prokaryotic cell which differentiates it from the eukaryotic cells
Eukaryotic cells
Eukaryotic cells also have plasma membranes, ribosomes and cytoplasm. Eukaryotic cells also have membrane-bound nucleus, membrane bound organelles, such as chloroplast, mitochondria, endoplasmic reticulum, and Golgi apparatus which together differentiates it from a prokaryotic cell
tRNA is involved in?
A. carrying amino acids
B. carrying glucose molecules
C. carrying ribosomes
D. carrying nucleotides
Answer:
carrying aminio acid
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Which is an example of a physical change?
A. Wood rots.
B. Water evaporates.
C .A nail rusts.
D. Gasoline ignites.
Answer: Water Evaporates
Explanation: When water changes from a liquid to a gas it isn't going under and chemical reaction it's just evaporating. But when Wood rots, A nail rusts, and gas ignites those are all undergoing a chemical change
Which part of the brain is indicated by the arrow below?
Pons
Cerebellum
Cerebrum
Medulla oblongata
Answer:
Pons
Explanation:
The Pons of the brain is indicated by the arrow below.
Pons is located in front of cerebellum, composed up nerve fibers make a bridge between he two hemispheres of the cerebellum of brain. Thus option A is correct.
What are the different parts of brainstem ?
The brain stem have different parts such as midbrain, pons, medulla oblongata.
The midbrain present between the cerebrum and pons.
The nuclei and cerebral tracts are present, where nuclei act as a relay stations for both ascending and descending nerve fibers, mainly involve in auditory and visual reflexes.
Pons is present in front of cerebellum, the nerve fibers make a bridge between the two hemispheres of the cerebellum.
Medulla oblongata is the most interior part of the brain stem, continuous with the spinal cord, the outer portion is called white matter and the central portion have grey matter.
Thus option A is correct.
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Drag the tiles to the correct boxes to complete the pairs.
Match the terms with their definitions.
Dominant gene.
Phenotype.
Gene.
Genotype.
A sequence of DNA responsible for coding a protein ___.
The complete range of alleles an organism carries for a specific trait ___.
An allele that determines the outward trait of a heterozygous organism ___.
The observable characteristics of an organism ___.
Answer:
1. phenotype
2. dominant gene
3. genotype
4. gene
In a prokaryotic cell, most ribosomes are
Answer:
They are roughly 40 percent protein and 60 percent rRNA.
Explanation:
I hope this helped:)
2. Give one possible reason why the population decreased in 1990 after it had reached its
carrying capacity
1 I
Answer: The population exceeded its carrying capacity because there were more resources available so many deer reproduced and the population quickly exceeded the carrying capacity.
Explanation:
When the population size exceeds the carrying capacity, the population must decrease. One possible reason is the lack of available resources to support this population size.
What is Carrying Capacity?
A growing population that inhabits a limited space is gradually affected by density, rebounding in the multiplication rate.
The population growth per capita rate decreases as population size increases.
The population reaches a maximum point delimited by available resources, such as food or space. This point is known as the carrying capacity, K.
Carrying capacity refers to the maximum point at which the environment can support a growing population.
K is a constant. It coincides with the population size when natality rate and mortality rate are equal to each other. This is the equilibrium point.
If the population size, N, is inferior to K ⇒ the population still grow. When N approximates to K ⇒ the population's growth speed decreases. When N=K ⇒ the population reaches equilibrium, When N is superior to K (N>K) ⇒ the population must decrease in size because there are not enough resources to maintain that size.So when the population size exceeds K, carrying capacity makes the population decrease in size. This is because there are not enough resources for this population to survive.
Probably this population's size exceeded the carrying capacity because there were available resources and animals were not predated by any other species. So this population kept growing until they exceeded the carrying capacity level.
Once they did it, the environment could not support this population size, probably because of the lack of available resources, so the population had to decrease in size. Mortality rate must have increased while natality rate must have decreased.
One possible reason is the lack of available resources to sopport this population size.
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Forest fires can cause a secondary disturbance in an ecosystem what is a secondary disturbance
Answer:
A progressive series of changes that take place in an area where a
community is living.
Explanation:
Answer:
important to remember that the so called “secondary” disturbance is secondary only because it occurs second sequentially.
Explanation:
hope it helps
which of the following beat describes the producers in a terrestrial food web
Answer:
the photo?
Explanation:
the photo? there isnt a picture
I need help with the filling in the Punnett square.
Answer:
Both of the squares are filled out correctly
What is the process of mitosis?
Answer:
duplication of 2 dioploid identical sister cells
Explanation:
inter-phase, pro-phase, meta-phase, ana-phase, telo-phase, cytokinesis
which question can be answered using the scientific progress
A:should people be made to reuse all bags?
B:Is it right to make people stops using plastic bags?
C:Is the government doing enough to fight pollution?
D:What is the effect of plastic bags on birds?
The answer is D
Explanation:
I apologise for the late answer, but D would be the best one, as it does not discuss morality or anything differing from person to person. The effect it has on birds however, can be readily studied using the scientific method.
What is the name of three bases on mRNA called?
A.gene
B. codon
C. triplet
D. anticodon
Answer:
B
Explanation:
Each group of the three bases in mRNA constitutes a codon, and each codon specifies a particular amino acid
The government of a flood prone region wants to implement some measure to reduce risk of floods. Which method is likely to reduce the risk of floods in that region
Answer:
The correct answer is "preservation of wetlands".
Explanation:
Wetland are areas of lands that are saturated with water, usually comprised by marshes or swamps. Preservation of wetlands help to reduce the risk of floods because wetlands temporarily store and slow the release of stormwater. It has been reported that areas where wetland have been lost, the chances of flood increases by as much as 80 percent. The government of a flood-prone region would likely reduce the risk of floods by preserving its wetlands.
Where are neutrons located?
O A. Outside the nucleus of an atom
O B. Inside the cell membrane
O C. Inside the nucleus of a cell
O D. Inside the nucleus of an atom.
Answer:
D. Inside the nucleus of an atom.
Explanation:
The nucleus (center) of the atom contains the protons (positively charged) and the neutrons (no charge). The outermost regions of the atom are called electron shells and contain the electrons (negatively charged).
Answer:
D
Explanation:
Since this is a biology/chemistry question, you have to be careful that you use the right term. You must be talking about atoms. So B and C are both incorrect because the word cell is used as the main location.
What about A and D? The atom is used and those two are the ones you need to consider. A neutron gives its home address as the nucleus. It is part of the nucleus. So A is incorrect. A neutron is inside the nucleus.
That leaves with D and that's the answer.
Which best describes what solar systems are comprised of? stars, planets, moons, asteroids, and comets galaxies universes planets, moons, comets, and asteroids
Answer:
The correct answer is star,moon,planets,moons, astroid and comets galaxy universes planets,moon, comets and astroids.
Explanation:
The above answer is correct
Select all that apply.
Which of the following are not properties of lipids?
derived from fish, beans, milk, and eggs
held together by peptide bonds
made up of steroids and phospholipids
deep, long-term storage of energy
Answer:
b
Explanation:
because they are held together by ester bonds not peptide bond :)
Plants such as Venus fly trap and the Sindhu attract and consume in six these plants are able to produce substance which breakdowns in six into compounds that are usable by plants one element obtain from these compounds is nitrogen the chemical compounds that break down the insects are most likely
Answer:stomach acids i presume such as Gastric acid, or what most people call stomach acid, is vital in the proper breaking down of your food. It's composed of multiple compounds and enzymes, which form the fiery cocktail of hydrochloric acid (HCI), potassium chloride and sodium chloride.
Explanation:
What is one reason that carbon dioxide is increasing in the atmosphere
today? *
Answer:
Concentrations of carbon dioxides are rising mainly due to energy-burning fossil fuels. Fossil fuels such as carbon or oil include carbon plants which, over the years, are photosynthesized in the atmosphere; in a few hundred years we have returned this carbon to the air
Explanation:
Even fundamental human functions — eating inhalation and digestion — generate CO2. In the life cycles of the earth, it is an essential chemical. Active plants and trees are absorbing CO2 and turning it into food with sunlight and water. There are problems when more CO2 is emitted than is absorbed by our vegetation. Activities to produce high carbon dioxide include:
Consuming electricity: Fossil fuels emit CO2, with coal emitting twice as much gas as oil. Worldwide, 85% of energy is generated by fossil fuels. As China and India continue to industrialize, the number of coal-burning plants will rise. Today, power generation represents 41 percent of CO2 emissions in the United States.Transportation: Locomotive is the second greatest source for U.S. CO2 emissions for business or pleasure. Travel is also a factor internationally. A cruise ship study indicated that holidays at sea produce 12 times more CO2 than on land. 41,000 tonnes of CO2 was generated at Denmark's 11-day worldwide Copenhagen Conference on Climate Change. U.S. representatives alone produced sufficient CO2 to fill 10,000 Olympic pools.Building: Manufacturing produces large amounts of CO2, yet only represents 2% of US emissions. The most serious offenders are the manufacture of iron and steel and cement. These businesses use huge amounts of thermal energy to turn commodities into building products.Deforestation: Trees are powerful organisms that absorb CO2 from the air and remove it. It stops the process by cutting them down. While deforestation is a tiny source of increasing CO2 in the U.S., 20 percent of global CO2 emissions are due to forest loss. Fuel-burning trees and natural forest material breakdown also generate CO2.Why does a buzzer starts to buzz as soon as the circuit is complete?
Answer:
The circuit is complete again and the the electric charges start to flow. ... Depending on the distance between the electromagnet and the nail, the rigidity of the rubber band and the strength of the electromagnet, the circuit can be broken and completed several times a second. Hence you hear a buzzing sound
Answer:
Depending on the distance between the electromagnet and the nail, the rigidity of the rubber band and the strength of the electromagnet, the circuit can be broken and completed several times a second. Hence you hear a buzzing sound.
What is the purpose of meiosis I and II ?
A) To convert one type of cell into another
B) To produce new body cells
C) To produce games, or sex cells
D) To make offspring
Match the information given with the correct stage of labor: 1st (dilation), 2nd (expulsion), or 3rd (placental).
1. Stage that has the onset of regular uterine contractions and dilation of the cervix___.
2. Stage in which the cervix dilates to a diameter of about 10 cm____.
3. The stage which commonly lasts 8-24 hours____.
4. The stage in which the amniotic sac ruptures____.
5. The stage in which the baby exits the vagina_____.
6. The stage which commonly lasts from a few minutes to an hour____.
7. The stage in which contraction of the woman's abdominal muscles assists the uterine contractions_____.
8. The stage in which the placenta is expelled from the uterus_____.
Answer:
The correct answer is -
1) 1st stage
2) 1st stage
3) 1st stage
4) 1st stage
5) 2nd stage
6) 2nd stage
7) 2nd stage
8) 3rd stage.
Explanation:
Labor has three different stages 1st (dilation), 2nd (expulsion), or 3rd (placental).
Stage 1st: It is the stage that starts with dilation of the opening of the cervix to 10 cm and contraction of the uterus.
Stage 2: in this stage fetus head moves to the cervix and gets into the birth canal of the mother.
stage 3. The placenta and umbilical cord expel from the mother and this is cut after the delivery.
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Answer:
Huh?? what did you say?
Explanation:
When deciding on new environmental policies
and laws, which term is used to describe the
comparison between benefits and costs of
human activities?
Answer:trade-off
Explanation:trust me bro i just got it right
