Answer:
Because Mercury and Venus are too close to the Sun and its gravity.
Explanation:
Mercury and Venus do not have moons because of their proximity to the Sun and their specific orbital characteristics.
Both planets are located relatively close to the Sun, and their gravitational interaction with the Sun is strong.
Additionally, their orbits are relatively stable, which means that any small celestial bodies that might have approached them in the past were likely captured by the Sun's gravitational pull or flung out of the solar system.
Unlike outer planets such as Jupiter and Saturn, which have strong gravitational influences and numerous moons, the inner planets like Mercury and Venus have not been conducive to capturing or retaining moons due to their specific orbital dynamics.
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Which symptom would an individual with a narrow foramen most likely experience?
A.
back pain from the compressed nerves
B.
lower blood pressure from increased blood flow
C.
poor posture from loss of tendon attachment sites
D.
increased flexibility from the constriction of muscle
Answer:
its A. back pain from the compressed nerves
20 POINTS + A BRAINLIEST!!!
Answer:
its 10 points but it's fine
----------------------
The answer is C
Explanation:
Answer:
I think the answer is C, so sorry if I got it wrong.
4. Assume that producers in an ecosystem have 1,000,000 kilocalories of en
ergy. How much energy is available to primary consumers? How much is available to the quaternary consumers?
Answer:
If an ecosystem has 1,000,000 kilocalories of energy in the producers only 100,000 kilocalories of energy would be available to the primary consumers.
Explanation:
Which of the following is an example of selective permeability?
a magnet
a window screen
a milk jug
a bottle rocket
A window screen is an example of selective permeability.
• Selective permeability is a characteristic and function of the cell membrane, which plays an important role in sustaining homeostasis by monitoring the passage of certain substances while inhibiting others from invading the cell.
• Of the given options, a window screen is an example of selective permeability.
• A window screen is also known as the bug screen, insect screen, wire mesh, or fly screen is created to cover the window opening.
• It is generally a mesh formed of fiberglass, metal, pieces of plastics, plastic wire, and pieces of metal or wood.
• It functions to prevent the entry of bugs, birds, debris, and other animals into the building, however, it does not prevent the entry of fresh air.
Thus, a window screen is an example of selective permeability.
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Organisms that perform chemosynthesis can be referred to as... (Select all that apply...)
Phototrophs
Heterotrophs
Autotrophs
Chemotrophs
A scientist argues that the Sahara Desert used to be part of the ocean. What piece of evidence would best help support her argument?
options:
A:Finding a fossil of a shark in the desert
B:Finding evidence of past earthquakes.
C:Finding a fossil of an arctic plant.
D:No evidence would support it. If it’s a desert now, it’s always been a desert.
IF RIGHT I GIVE BRAINLIST
Answer: A finding a fossil of a shark in the desert .
Explanation: with fossils we can dna test them and trace them back millions of years . If you find a fossil of a shark in the desert a dna test may be conducted and this can prove the point .
Which example is a body fossil?
A. dinosaur bone
B. an ornithopod track
C. shrimp burrow
D. dinosaur footprint
Answer:
A.) Dinosaur Bone
should be the answer
Read the scenario below and answer the questions that follow for 2 points each: Two Siamese and three Persian cats survive a shipwreck and are carried on driftwood to a previously uninhabited tropical island. All five cats have normal ears, but one carries the recessive allele f or folded ears, his genotype is Ff. The other four cats are not carriers, so their genotype is FF. Thus there are 10 total alleles within this population, 9 being F alleles and 1 being f. So, the frequencies are 9/10 or 0.90 for F the allele and 1/10 or 0.10 for the f allele. 1. Identify ONE of the five conditions required for Hardy-Weinberg equilibrium that this population of cats does not meet. 2. If you assume Hardy-Weinberg equilibrium for this population, what would be the frequencies of the two alleles after 10 generations? 3. Knowing that the frequency of the folded ears genotype ff is equal to to the frequency of the f allele squared (0.1 x 0.1), how many cats would have folded ears if after 10 generations there are 2,500 cats on the island?
Answer:
c
Explanation:
According to H-W, a population is in equilibrium if it meets five conditions, and have the same allelic and genotypic frequencies through many generations. 1) Infinite population size / 2) p=0.9 and q=0.1 / 3) 25 cats
-------------------------------------------------------
Let us review some theoretical framework about Hardy-Weinberg equilibrium, while we answer the questions.
⇒ Hardy-Weinberg assumption for a population in equilibrium:
Random matings No superposed generations No mutations No migration Infinite population size ⇒ No genetic drift No natural selectionQ1. Identify ONE of the five conditions required for Hardy-Weinberg equilibrium that this population of cats does not meet.
Since this population is composed of two Siamese and three Persian cats, the condition that this population does not meet is infinite population size.
This population is under the effect of genetic drift for being only 5 individuals colonizing an island.
*****************
⇒ According to Hardy-Weinberg, p and q represent the allelic frequencies in a locus, referring to the allelic dominant or recessive forms.
The genotypic frequencies after one generation are p² (H0m0zyg0us dominant), 2pq (Heter0zyg0us), q² (H0m0zyg0us recessive).
Populations in H-W equilibrium will get the same allelic frequencies generation after generation.
The sum of these allelic frequencies equals 1, this is p + q = 1. The genotypic frequencies sum also equals 1, this is p² + 2pq + q² = 1.
Being
p the dominant allelic frequency, q the recessive allelic frequency, p² the h0m0zyg0us dominant genotypic frequency q² the h0m0zyg0us recessive genotypic frequency 2pq the heter0zyg0us genotypic frequencyQ2. If you assume Hardy-Weinberg equilibrium for this population, what would be the frequencies of the two alleles after 10 generations?
Allelic frequencies, f(x), are
f(F) = p = 0.9f(f) = q = 0.1If this population is in H-W equilibrium, the allelic frequency will be the same through many generations.
So, after 10 generations, the allelic frequencies will still be p = 0.9 and q = 0.1.
Q3. Knowing that the frequency of the folded ears genotype ff is equal to to the frequency of the f allele squared (0.1 x 0.1), how many cats would have folded ears if after 10 generations there are 2,500 cats on the island?
We know that,
f(F) = p = 0.9f(f) = q = 0.1N = 2500 catsTo get the number of individuals with folded phenotype, we should get the phenotypic frequency, which equals the genotypic frequency because it is the recessive phenotype.
Genotypic and Phenotypic Frequency
F(ff) = q² = 0.1 = 0.01Now that we have the phenotypic frequency, we just need to multiply it by the total number of individuals in the population, N.
N = 2500 individuals
Individuals with folded ears = 0.01 x 2500 = 25So, after 10 generations and a population size of 2500 cats, there will be 25 folded-eared individuals.
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A lab technique called centrifugation of a cell results in the rupture of the cell membrane and its contents compacting into a pellet in the bottom of the tube. Bathing this pellet with a glucose solution yields metabolic activity including the production of ATP. Which is most likely in the pellet
Answer: mitochondria
Explanation:
In all body cells, with the exception of a few, mitochondria are present. Depending on the function of that type of cell, there are typically several mitochondria present in one cell. Mitochondria are found along with other organelles of the cell in the cytoplasm of cells.
1 point
14. A scientist is using potassium-40, which is a radioactive isotope of
potassium, to discover the absolute age of a fossil by radiometric dating.
The scientist determines that about three-fourths of the original
potassium-40 atoms in the fossil now remain in the fossil. What additional
information is necessary for the scientist to determine the absolute age of
the fossil? *
the half-life of potassium-40
O O
the identity of an index fossil
the atomic mass of potassium-40
the total mass of the fossil
Answer: c. the ratio of the mass of potassium-40 to stable potassium isotopes
Explanation:
The hierarchical order of organization of multicellular organisms is shown below.
cells → tissues → organs →
What level of organization is next in the hierarchy?
Which region of the spine is highlighted in yellow in the image below?
A diagram of the spine.
sacrum
thoracic
lumbar
cervical
Answer:
The answer is lumbar.
Can males be carriers? Explain.
Normal traits -
Sex-linked traits -
Answer:
yes due to any kind of sexual activity, if the person has a sexual disease it can be transferred to a male via orally or vaginally
What type of atmospheric conditions does climate describe? (5 points)
Answer: Averge
Explanation:
8. What makes early
onset Alzheimers more
likely to occur in Down
Syndrome patients? *
Explanation: Scientists believe the increased risk is due to the extra chromosome, chromosome 21, that causes Down syndrome. Persons born with Down syndrome have three copies (instead of the normal two copies) of this chromosome.
The end result of the formation of the female gamete is? A. The formation of 4 daughter cells identical to the mother. B. An ootid and 3 disintegrating polar bodies. C. 4 identical haploid cells. D. 2 daughter cells identical to the mother.
Answer:
C
Explanation:
bc i did it and got it correct:)
it is an infunction of the lungs caused by bacteria virus fungi or protozoa in rare condition
Answer:
Pneumonia is an infection of the lungs caused by bacteria virus fungi or protozoa in rare condition.
Identify the organelles in the cell to the right. A b c d e f
Answer:
A) Cytoplasm
B) Chloroplast
C) Plasma membrane
D) Cell membrane
E) Smooth endoplasmic reticulum & Rough endoplasmic reticulum
F) Cell wall
Explanation:
Look at the picture below
Which of the following is not a cnidarian?
a. hydra
b. sea anemone
c. clam
d. coral
Answer:
clams is NOT A CNIDARIAN
Explanation:
Hope this helps!!
Answer:
coral
Explanation:
1. The type of environment that is suitable for a certain species is its
A. habitat
B. community
C. geographical range
D. population
Answer:
Habitat
Explanation:
Definition: he natural home or environment of an animal, plant, or other organism.
"wild chimps in their natural habitat"
Anybody who helps me with this gets 10 brainly points.
Answer:
Explanation: in tracking the zebra the scientists are trying to monitor the movement of these zebras, in so doing can have a comprehensive understanding of what happens to these zebras during the movement.
When an organism is classified as an autotroph, these organisms ___.
A. produce their own food.
B. can not move from one place to another.
C. can not produce their own food.
D. move very fast.
Answer:
I believe the answer is A. Produce their own food.
Hope this helped :)
What else erupts besides lava?? PLEASE SOMEONE HELP ME ASAP
Answer:
Smoke would make sense but I cant be sure. Is it a multiple choice question?
(also it could be water from a geyser)
Every fall, Mrs. Rockel and her family rake over 100 bags of leaves. This year we raked only 60 bags, a considerable decrease compared to the past several years. Using your knowledge of the process of photosynthesis, construct a logical hypothesis to explain why.
Please help
Answer:
''Photosynthesis directly affect the vegetative growth of plants''
Explanation:
''Photosynthesis directly affect the vegetative growth of plants'' is the hypothesis that shows decrease occur in the bags of leaves. Photosynthesis is directly related to vegetative growth because Photosynthesis is a process of making food by using sunlight, this food is used by the plant to bear more number of leaves so if the process of photosynthesis is done properly, no decrease occur in the bags of leaves.
Where can you find the human sex chromosomes in a karyotype
Answer: According to international conventions, human autosomes, or non-sex chromosomes, are numbered from 1 to 22, in descending order by size, with the exceptions of chromosomes 21 and 22, the former actually being the smallest autosome. The sex chromosomes are generally placed at the end of a karyogram.
What turns on and off the lac operon
Answer: off: lac repressor, on: CAP
Explanation:
Where do sperm mature?
A. Vas deferens
B. Urethra
C. Epididymis
D. Seminiferous tubules
Answer: Epididymis
Explanation:
This is where the sperm matures at
The sun shines down on this family as they play on the beach. What is this called?
A) conduction
B) no answer text provided
C) convection
D) radiation
Answer:
i think that is radiation
Explanation:
The sun shines down on this family as they play on the beach. is this called radiation. Option D. This is further explained below.
What is radiation?Generally, the removal of electromagnetic waves energy, particularly magnified energy particles that induce ionization.
In conclusion, The sun radiates and its energy is called the solar waves.
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Distinguish the steps involved in the impact theory of lunar formation.
The giant impact theory — the idea that a catastrophic collision about 4.5 billion years ago between Earth and a protoplanet about half Earth's size created a disk of molten rock, gas and debris that consolidated to form the moon — was first set forth in the mid-1970s.
The most normally invoked grounds for lunar formation maintain that a giant protoplanet is sometimes called Theia.
What is lunar formation?
When the Chemical differentiation and crystallization delivered dense material that sank to the bottom of the lunar magma ocean and a spirited crust that created the lunar highlands.
The numerous commonly invoked justification for lunar formation holds that a giant protoplanet, sometimes called Theia, struck the recently formed Earth 4.5 billion years heretofore and formed a cloud of debris that fast coalesced into the moon.
But that hypothesis has mourned from a nagging flaw. Simulations of moon-forming crashes have shown Theia would have stood as the immediate donor of lunar material.
But commentaries of Apollo moon rocks have authenticated that the moon appears in many ways a chemical clone of Earth, not Theia.
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Genes are passed down from parents to offspring. Tor F
Answer:
True
Explanation:
