How did the development of sexual reproduction affect evolutionary change?
The digestive, respiratory and circulatory systems are controlled
by the:
Select one:
a. skeletal system
b. ophthalmic branch
C. voluntary nervous system
d. autonomic nervous system
PLEASE HURRY 5 mins left !!!
Answer:
D
Explanation:
The digestive, respiratory and circulatory systems are controlled by the: d. autonomic nervous system
The autonomic nervous system (ANS) is the part of the nervous system that controls involuntary physiological processes (e.g., heart rate, blood pressure, respiration and digestion).
ANS supplies internal organs such as the stomach, intestine, liver, kidneys, bladder, genitals, digestive glands, etc.
ANS is divided into three main parts: Sympathetic nervous system: responsible for forming localized adjustments (e.g., sweating) and cardiovascular system adjustments. Parasympathetic nervous system: responsible for body functions when the body is relaxed, resting, or feeding. Enteric nervous system: responsible for controlling the gastrointestinal tract functions.
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Please answer quickly
Answer:
which one is it 9 42 or 12?
How could the interaction between the stove, the water, and the air be used to model the movement of energy between
Earth's subsystems?
Answer:
Can you think of some examples of interactions between two or more spheres? Atmosphere. Geosphere. Hydrosphere. Biosphere. Atmosphere.
Atmosphere: the blanket of gases surrounding the planet
Geosphere (lithosphere): all of the rocks and "hard parts" of the Earth
Biosphere: all living things
Hydrosphere: all of Earth's water
Answer:
The stove represents the Sun’s energy input to the hydrosphere. The energy exchange between the water and the air represents the energy exchanged between the hydrosphere and the atmosphere.
Explanation:
The heart is one of the first parts of the embryo to develop. What part of the stem cells provides instructions for building the heart?
Answer:
answer d
Explanation:
DNA provides instructions for building the heart
Help with this??
Aaaaaaa
Answer and Explanation
25%
Answer:
25%
Explanation:
sorry
Most neighborhood streets are illuminated at night by streetlights. The streetlights are _____ and _____. Therefore, they are likely to be _____ by the competitive market. nonrival; excludable; underprovided nonrival; nonexcludable; underprovided rival; excludable; efficiently provided nonrival; nonexcludable; overprovided
Answer:
nonrival; nonexcludable; underprovided.
Explanation:
In a perfect competition, there are many buyers and sellers of homogeneous products, and there is free entry and exit in the market.
This simply means that, in a perfectly competitive market, there are many buyers and sellers (price takers) of homogeneous products (standardized products with substitute) and the market is free (practically open) to all individuals or business entities that are willing to trade all their goods and services.
Generally, a perfectly competitive market is characterized by the following features;
1. Perfect information.
2. No barriers, it is typically free.
3. Equilibrium price and quantity.
4. Many buyers and sellers.
5. Homogeneous products.
A substitute product can be defined as a product that a consumer sees as an alternative to another product and as such would offer similar benefits or satisfaction to the consumer.
For substitute products (goods), the cross-price elasticity of demand is always positive because the demand of a product increases when the price of its close substitute (alternative) increases.
A nonexcludable good simply means that it's near impossible for a user to effectively exclude others from using the good. Thus, each and every individual have access and can use the goods.
Basically, all public goods such as streetlights are nonrival and nonexcludable goods.
Similarly, nonrival goods refer to goods that can be accessed, processed and consumed (used) by multiple consumers at a specific period of time.
Additionally, any good that is nonrival and nonexcludable is said to be a public good.
In this scenario, most neighborhood streets are illuminated at night by streetlights. The streetlights are nonrival and nonexcludable. Therefore, they are likely to be underprovided by the competitive market and this is generally considered to be a market failure.
Hence, a market failure arises when there is inefficiency in the distribution or allocation of goods and services in a free market.
This ultimately implies that, the demand of the consumer of these goods and services are not being met with the level of supply (output) required i.e the forces of demand and supply are not efficient in producing the level of output required by the economy. Some of the causes of market failure are imperfect information, monopoly, oligopoly, externalities, etc.
How can embryos be more useful than adults to show evolutionary relationships among organisms?
Select one:
Related organisms always appear identical in embryonic stages.
Adults may have mutations that are not found in embryos.
Evolutionary relationships are more easily observed in more simple organisms.
Features found in embryos may not be found in adults.
Answer:
Related organisms always appear identical in embryonic stages.
Explanation:
Embryos of organisms that have a closer genetic relationship to one another tend to look similar for a longer period of time since they share a more recent common ancestor. Thus, embryology is frequently used as evidence of the theory of evolution and the radiation of species from a common ancestor.
In a population of 400 salamanders, some individuals have long toes and others have short toes. This phenotypic difference is due to a single gene with dominant and recessive alleles, T and t, where T confers long toes. If the toe length gene is in Hardy Weinberg equilibrium, and 256 individuals have short toes, how many individuals are heterozygous at the toe length locus?
Solution :
Total number of salamanders or population of salamanders is given = 400
Out of theses salamanders, some have long toes while others have a short toes.
Number of individuals of salamanders having short toes = 256
The short toe individuals [tex]$(q^2) = 256/400$[/tex]
Therefore, [tex]$q=\sqrt{256/400}$[/tex]
= 0.8
p + q = 1
∴ p = 1 - q
= 1 - 0.8
= 0.2
The number of the heterozygous individuals = (2pq x 400)
= ( 2 x 0.2 x 0.8 ) x 400
= 0.32 x 400
= 128
What is the term for the absolute worst type of inflation, where prices skyrocket out of control and a nation's economy becomes at risk of collapse?
Answer:
Hyperinflation is a term to describe rapid, excessive, and out-of-control general price increases in an economy.
Explanation:
Humans and baboon have noses with nostrils that face downward, but many other primates have noses with nostrils that face out to the sides. Humans and baboons are also more closely related to each other than they are to primates with outward-facing nostrils. Therefore, the fact that both humans and baboons share the downward-facing nostril orientation is an example of
Answer:
a shared derived trait.
Explanation:
Genetics can be defined as the scientific study of hereditary in living organisms such as humans, animals and plants.
Simply stated, a trait refers to the specific features or characteristics possessed by a living organism. It is essentially transferred from the parent of a living organism to her offspring and as such distinguishes him or her.
Heredity refers to the transfer of traits (specific characteristics) from the parent of a living organism to her offspring through sexual reproduction or asexual production. Some examples of hereditary traits are dimples, tongue rolling, baldness, weight, handedness, freckles, curly hair, hair color, blindness, complexion, height, etc.
All humans and baboons are created having noses with nostrils underneath i.e facing downwards but other primates such as platyrrhines have their nostrils facing sideways (face out to the side). Also, humans and baboons shared close similarities with each other when compared than they share with the primates having a outward-facing nostrils.
This ultimately implies that, both humans and baboons sharing the downward-facing nostril orientation is an example of a shared derived trait.
A shared derived trait can be defined as a trait or characteristic that is shared between two lineages and subsequently evolves leading up to a clade, which is a distinguishing feature from other species.
How did Mendel solve the problem of always observing the same traits in his experiments?
Factorise completely pq - q?
Explanation:
q(p-1) is the factorization of pq- q.
Alleles are represented by using letters. A dominant gene is
represented by what kinds of letters? Capital or small letters?
Answer:
Capital
- Refer to the basic theory in genetics.
A condition in the environment that can restrict a population's growth is
A recessive allele for blue eyes (b) has a frequency of .3 in population 1 and a frequency of .15 in population 2. Pollution causes a number of people in population 1 to go to population 2. After they migrate 35% of the people in population 2 consist of people from population 1. What would be the frequency of blue eyes in population 2 after the migration
Answer:
The frequency of blue eyes in population 2 after the migration is q₂´ = 0.195 ≅ 0.2
Explanation:
Whenever migration, m, occurs between two populations, there is genetic flow going on. Genetic flow is an evolutive strength only if migration > 0 and if the allelic frequency in one generation is different from the allelic frequency in the next generation.
Genetic flow acts homogenizing the allelic frequencies between the two populations, and it might introduce variability into the new one.
For genetic flow to be possible, there needs not only the movement of the genes from one population to the other but also the reproduction process on the new population. Hence, it involves an interaction between the dispersion pattern and the reproductive system.
Available data:
Population 1 → frequency of the recessive allele b = 0.3Population 2 → frequency of the recessive allele b = 0.15m = proportion of gametes coming from the population 1 = 30% = 0.31-m = proportion of gametes that remain in the populationp = frequency of the dominant allele in population 1 before migrationq = frequency of the recessive allele in population 1 before migrationp´ = frequency of the dominant allele in population 2 after migrationq´ = frequency of the recessive allele in population 2 after migrationTo calculate the frequencies of the gametes (p1, q1, p2, q2) after migration, we can use the following equations:
p₁’ = p₁ (1 - m) + p₂ x mq₁´ = q₁ (1 - m) + q₂ x mp₂’ = p₂ (1-m) + p₁ x m q₂´ = q₂ (1 - m) + q₁ x mSo to know the frequency of blue eyes in population 2 after the migration, we just need to replace the terms in the equation for the given values, and then calculate q₂´.
q₂´ = q₂ (1 - m) + q₁ x m
q₂´ = 0.15 (1 - 0.03) + 0.3 x 0.3
q₂´ = 0.105 + 0.09
q₂´ = 0.195 ≅ 0.2
Crop rotation improves the quality of soil because:
Select one:
Soil is not loosened so less erosion takes place
Weeds and vegetation are allowed to grow
It prevents pesticides from affecting crops
Humans mess with natural processes
Different plants require different nutrients
Answer:
2nd one
Explanation:
crop rotations with nitrogen fixing crops such as legumes and some cover crops, can help put nitrogen back into your soil naturally. this makes soil healthy and can increase yields
Can someone tell me if this is correct I need help with the percentage
Answer:
Hand = 75%
No hand = 25%
Explanation:
It's the same thing as last time. Since 3 of them are heterozygous and have 1 dominant allele, they have the dominant trait. And since one of them only has recessive alleles then it should have the recessive traits.
So the hand should have 75% and no hand has 25%.
( I saw someone else just post a link so I answered it in that question box, but it got deleted so i'm just writing it out here ig)
There are 150 Pakicetus in the population at present. Assume Charles had another mutation; this one at the B locus, to produce allele b. What is the gene frequency of allele b in the population if the population of Pakicetus reaches 100,000
Answer: Hello your question is incomplete below is the complete question
Let’s look at a different gene locus, we’ll call it B. The normal, wild type, the population was 100% BB. There are 150 Pakicetus in the population at present. Assume Charles had another mutation; this one at the B locus, to produce allele b. What is the gene frequency of allele b in the population if the population of Pakicetus reaches 100,000
answer : ≈ 1
Explanation:
Determine the Gene frequency of allele b
Population = 100,000
There are 150 Pakicetus in population i.e. 300 alleles at locus B
hence the frequency of b = 1/300 = 0.33%
Increase in population does not affect frequency of b ( HW equilibrium )
therefore the Gene frequency of allele b
= 0.33% * 0.33% * 100000 = 1.08
≈ 1
birth defects due to radiation are a concern also. why is a fetus especially at risk?
Of the babies that survive, however, few will have birth defects related to the exposure, regardless of how much radiation they were exposed to. Large radiation doses to the fetus during the more sensitive stages of development (between weeks 2 and 18 of pregnancy) can cause birth defects, especially to the brain.
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A _____is the organism's role in its habitat.
Answer:
niche i think
Explanation:
brainliest?????
I need answer for question B please!!
Answer:
the time of day cause the differences in wind patterns
Explanation:
Help 7 grade science
Answer:
rotifer
Explanation:
An omnivore feeds on both plants and animals. I'm this food web the rotifer is eaten by the copopod. The copepod feeds on golden algae (plant) and rotifer (animal), which makes it an omnivore. As such, the correct answer is rotifer because it is feed on by the omnivore, copepod.
Give an example of
how radiation is
transformed into
other forms of
energy.
help me
Answer:
Radio waves. Electricity. A surface heated by the sun converts the energy of the light into infrared energy which is a form of radiant energy.
Explanation:
;P
g Neuron A and neuron B interact with neuron C. Neuron A will produce an IPSP of -2mV in neuron C; neuron B produce an EPSP of 3mV in neuron C. The resting membrane potential is -70mV and the threshold is -50mV. Neuron A fires 6 times rapidly at the same time that neuron B fires 4 times rapidly. What is the resulting membrane potential in neuron C
Answer:
-70 mV
Explanation:
Given that Neuron A and Neuron B interact with Neuron C
Neuron A produces ; - 2mV of IPSP and fires 6 times
Neuron B produces ; 3mV of EPSP and fires 4 times
Resting potential = - 70mV
threshold = - 50mV
The resulting membrane potential in neuron C
= -70 + 6(-2) + 4(3)
= -70 - 12 + 12 = -70 mV
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1. What is the desired FUNCTION of a garden?
2. What are the subsystems in a garden? Explain.
Answer: A garden is a planned space, usually outdoors, set aside for the display, cultivation, or enjoyment of plants and other forms of nature, as an ideal setting for social or solitary human life. The single feature identifying even the wildest wild garden is control.
Explanation:
Everything in Earth's system can be placed into one of four major subsystems: land, water, living things, or air. These four subsystems are called "spheres." Specifically, they are the "lithosphere" (land), "hydrosphere" (water), "biosphere" (living things), and "atmosphere" (air). which means gardens to i think
What is the temperature of the middle most layer of the Sun's atmosphere?
What did fungi diverge from?
Which of the following is an abiotic factor in a biome
Answer: C
Explanation: Abiotic means non living so Wind, sunlight, soil, temperature, atmosphere, and water.
PLEASE HELP! Scientists performed studies on mussels and clams. They placed these different species in fresh water that had contaminants commonly found in agricultural runoff and human and animal waste. Within a few days, the mussels and clams had removed the majority of the contaminants. How do these findings relate to ecosystem services in natural environments?
A.
Introducing new species of mussels and clams will help reduce erosion and runoff into rivers.
B.
Increasing the biodiversity of mussels and clams in freshwater ecosystems will improve water quality.
C.
Growing mussels and clams in rivers will provide humans with a steady source of food.
D.
Using a single species of mussel or clam will remove greenhouse gasses from the atmosphere.
Answer:
b
Explanation:
biodiversity means increase value or increase the amount of mussels and clams in rivers to increase water quality