A population of crabs live on a light-colored sandy beach. In this environment there is a population of birds that eat the crabs. One year, there is a volcanic eruption near the beach and dark volcanic ash covers the beach. The sand is now much darker than it used to be. Scientists studying the area are most likely to predict which outcome?
A.
Some of the light-colored crabs will try to change their body color to be darker and pass on those traits to their offspring.
B.
Some of the light-colored crabs will try to change their body color to be lighter and pass on those traits to their offspring.
C.
Some of the crabs born with the body color traits that do not allow them to escape the birds will likely survive and pass on those traits.
D.
Some of the crabs born with the body color traits that allow them to escape the birds will likely survive and pass on those traits.
Answers
Answer:
Your answer is D).
Explanation:
If the crabs are able to avoid being eaten by the birds, then they are most likely darkly colored to blend in with the dark ashen sand, and as Charles Darwin theorized: survival of the fittest.
P.S.- After the birds leave for the day, the crabs can finally get back to vibin' on the beach
Related Questions
The diagram below represents an impulse pathway.
Nerve gas interferes with the action of an enzyme that breaks down acetylcholine. This process allows the acetylcholine to remain in a synapse almost indefinitely. At which location does this inhibiting effect of the nerve gas occur?
A) A
B) B
C) D
D) C
Answers
Answer:
Thanks
Explanation:
Answer is B
Explanation: it’s the neuron synapse it answers it in the question
Phillip Gingrich finds an S-shaped bone in this partial skull, a sigmoid process, which is unique to
one particular order of animals in the water today... which one?
Answers
Answer:
A primitive whale which he named Pakicetus.
Explanation:
Philip Gingrich is a vertebrate paleontologist at the University of Michigan. He has performed extensive research on whales at the Egyptian desert of Wadi Hitan. His research team member discovered a skull whose braincase was bigger than that of a walnut. Gingerich was able to link the small-brained animal, to an early whale.
The auditory bulla had an s-shaped bony crest known as the sigmoid process and these two features helped whales to hear in water. The case, however lacked other features that helped whales hear beneath the waves. This led Gingrich to the conclusion that the unknown animal was semi-aquatic. This finding also lent credence to the possibility of whales evolving from terrestrial animals.
is protein production active or passive transport and why
Answers
Answer:
If the solute carries a net charge, however, both its concentration gradient and the electrical potential difference across the membrane, the membrane potential,influence its transport. ... Thus, transport by carriers can be either active or passive, whereas transport by channel proteins is always passive.
Explanation:
When blood is flowing through a vena cava, which main blood vessel will it flow through next?
A hepatic portal vein
B hepatic vein
C pulmonary artery
D pulmonary vein
Answers
Answer:
C.
Explanation:
When the ventricle is full, the tricuspid valve shuts. This prevents blood from flowing backward into the right atrium while the ventricle contracts.
As the ventricle contracts, blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs, where it is oxygenated.
What is used to cut the chromosome open?
Answers
Answer:
Restriction enzymes
Explanation:
what process does the urchin perform to obtain its energy
Answers
Answer:
The Purple Sea Urchin obtains oxygen through diffusion only the diffusion of oxygen into the organism. Also, oxygen diffuses from the canals into the rest of the body and carbon dioxide diffuses back into the canals to be released.
Explanation:
:)
The Purple Sea Urchin obtains oxygen through diffusion only the diffusion of oxygen into the organism. Also, oxygen diffuses from the canals into the rest of the body and carbon dioxide diffuses back into the canals to be released.
What is the best example of a hypothesis leading to new experimental methods?The best example of a hypothesis leading to new experimental methods as the Thomas Hunt Morgan continued the genetic research of Gregor Mendel, but Morgan used fruit flies.
The best example of a hypothesis leading to new experimental methods is that the Thomas Hunt Morgan continued the genetic research of Gregor Mendel, but Morgan used fruit flies.
Through Thomas Hunt Morgan's fruit fly experiments, he was able to discover and notice the inheritance of specific chromosomes. This experiment gave Mendel a great opportunity to publicize his idea of studying humans.
Therefore, The Purple Sea Urchin obtains oxygen through diffusion only the diffusion of oxygen into the organism. Also, oxygen diffuses from the canals into the rest of the body and carbon dioxide diffuses back into the canals to be released.
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Which two processes cycle carbon directly between the atmosphere and biosphere?
Answers
Annie wants to have children, but she and her husband have been unsuccessful so far.
Do her cells in her ovaries need to go through mitosis or meiosis? Choose one, and
explain why.
Answers
Answer:
meiosis
Explanation:
The germ cells that enter meiosis become oocytes, the source of future eggs. Consequently, females are born with a finite number of oocytes arrested in the first meiotic prophase. Within the ovary, these oocytes grow within follicle structures containing large numbers of support cells. (i don't know if the explanation is correct but i know that it is meiosis)
What conclusion can you draw from the information in the chart?
O The gorilla and human are the most closely related organisms with the fewest differences in their amino acid sequences.
O The chimp and human are the most closely related organisms with the fewest differences in their amino acid sequences.
O The human and horse are the most closely related organisms with the fewest differences in their amino acid sequences.
O The monkey and gorilla are the most closely related organisms with the fewest differences in their amino acid sequences.
Answers
Answer:
d
Explanation:
d
The monkey and gorilla are the most closely related organisms with the fewest differences in their amino acid sequences. Hence option d is correct.
What are amino acid?Amino acid is defined as any of the elements present in both plants and animals that come together to produce a substance (protein), which is essential for a healthy body and for growth. The metabolism of amino acids plays a crucial role in many biological processes that take place inside the human body.
An examination of the first complete sequence of the gorilla genome suggests that humans and gorillas last coexisted 10 million years ago. The gorilla is the last of the surviving great apes, including humans, chimpanzees, orangutans, and gorillas, whose entire genetic sequence has been compiled.
Thus, the monkey and gorilla are the most closely related organisms with the fewest differences in their amino acid sequences. Hence option d is correct.
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EASY POINTS!
In humans, brown eyes (B) is dominant over blue eyes (b). Teddy has brown eyes, his mother has brown eyes and his father has blue eyes. Their punnett square is represented in the picture attached:
Teddy says that all 4 children in his family have brown eyes. Is this possible?
Question 12 options:
a. Yes, because every child has a 50% chance of having brown eyes
b. No, they should be half brown eyes and half blue eyes
c. No, at least one of his siblings should have brown eyes
Answers
Answer:
A. Yes, because every child has a 50% chance of having brown eyes
Explanation:
This is the correct answer
According to the Punnett square that is given below, the argument made by Teddy may not have correct evidence. This is because it is not possible to have all 4 children in his family has brown eyes. So, the correct option for this question is B.
What is Punnett square?A Punnett square may be characterized as a type of table in which all of the plausible consequences for a genetic cross between two individuals with known genotypes are given.
According to the context of this question, the genotype of the mother is Bb which has a brown phenotype because brown eye (B) is dominant over blue eyes (b). While the genotype of the father is bb. This is blue eyes.
When both these genotypes are crossed, the genotypes of offspring are Bb, Bb, bb, and bb. This means that the individuals have both traits of blue and brown phenotypes by 50% each.
Therefore, the correct option for this question is B.
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In many parts of the United States, homeowners use a significant portion of their energy budget to heat their home in the winter. It has been determined that lowering a thermostat by 3°F in the winter can reduce the energy costs by about 10 percent in many homes. An individual homeowner lowers their thermostat by 3 degrees exactly halfway through the billing period. For the month that the thermostat was lowered, the heating bill was $95. How much money did the family save in the month in which they lowered the thermostat setting halfway through the billing period?
Answers
Answer:
B. $5
Explanation:
$95/10 percent = 9.5
9.5/2 (because it is halfway through the billing period) = 4.75
4.75 rounded up to the nearest tenths place is 5.
A billing period is a duration of time that starts from the last closing date of the statement of the specific invoice. The billing amount fluctuates according to the usage of the services taken or used.
$5 will be saved by the family in a month when they lower the thermostat setting halfway through the billing period.
The amount can be estimated by:Given,
The heating bill when the thermostat was lowered = $95Reducing thermostats can reduce energy costs by = 10%10% of the total bill will be:
[tex]\dfrac {\$95}{10\%} = 9.5[/tex]
Divide the value by 2 because the thermostat was lowered in the middle of billing time.
[tex]\begin{aligned} \dfrac{9.5}{2} & = 4.5\\ &= \$ 5\end{aligned}[/tex]
Therefore, 5$ was saved by the family.
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What events cause exhalation?
Answers
Answer:
The process of exhalation occurs due to an elastic recoil of the lung tissue which causes a decrease in volume, resulting in increased pressure in comparison to the atmosphere; thus, air rushes out of the airway. There is no contraction of muscles during exhalation; it is considered a passive process.
Explanation:
A chimpanzee pushes a brown box on a wood floor. Then he uses the same force to push a blue box on the carpet. The boxes are identical except for color. Which box will move farther?
It's impossible to know
the blue box
the brown box
They will both move the same distance.
Answers
Determine if the gene for this trait resides on an autosome or sex chromosome. Use evidence to support your answer
Answers
Answer:
autosome
Explanation:
if it were on a sex chromosome then either more females would have it or more males would have but it's almost split evenly
Read the following passage on Hox genes. Using the information presented, write a short passage to support the claim that many Hox genes are regulatory genes.
The genome of an organism can be many millions of base pairs long. Genes are regions of the chromosome that code for protein products. They are scattered throughout the chromosome with little logical reason for their placement. There is an exception to this disorder—Hox genes, which are a family of genes that produce transcription factors. Hox genes are found in most eukaryotes. They are clustered together in the genome and always found in a particular order. The genes are in the same order as the characteristics are found along the body axis in the organism itself. These genes specify segment placement, such as whether a segment will form part of the head, thorax, or abdomen. For example, Hox genes related to structures in the head of an organism are found first in the Hox cluster.
Hox genes have been studied in fruit flies. A cluster of 8 Hox genes are activated very early in development, laying out the segmented body plan of the head, thorax, and abdomen. There are very clear boundary lines of expression for each Hox gene. In fact, forcing embryonic Hox gene expression in a wrong part of the body can cause another region’s body parts to develop. Scientists created a fly that had legs where its antennae should be through induced Hox expression!
Answers
Answer:
hox genes are a subset of regulatory genes that encode transcription factors and they are important for embryonic development. they are activated by a cascade of regulatory genes and the proteins encoded by the early genes regulate expressions of later genes
Explanation:
The orderly arrangement and clear boundary lines of expression for each Hox gene suggest that many Hox genes are regulatory genes. Hox genes produce transcription factors that control the expression of other genes, regulating the developmental processes that determine segment placement and body plan.
Describe more about Hox genes ?The placement of Hox genes in a particular order along the chromosome is also indicative of their regulatory function. Hox genes are clustered together and in the same order as the body axis of the organism, suggesting that their arrangement is not random but rather a functional design.
Additionally, the ability to induce Hox gene expression in the wrong part of the body and cause the development of body parts from a different region of the organism further supports the regulatory role of Hox genes.
This shows that Hox genes have the ability to control the fate of cells and determine the formation of body structures. Therefore, it is clear that many Hox genes are regulatory genes that play a critical role in controlling the complex developmental processes of organisms.
Hox genes are also known for their role in evolutionary biology. Changes in the expression pattern or function of Hox genes can result in significant changes in body plan and morphology, leading to the development of new structures and functions.
For example, it is believed that the evolution of the arthropod body plan and the development of the jointed appendages in insects was due to changes in the expression of Hox genes. Similarly, changes in the Hox gene expression pattern have also been linked to the evolution of the vertebrate body plan and the development of the vertebrate limb.
Moreover, Hox genes have been linked to several human genetic disorders. Mutations in Hox genes can cause developmental abnormalities such as synpolydactyly, a condition where fingers and toes are fused together, or polydactyly, where there are extra fingers or toes. Mutations in Hox genes have also been associated with some forms of cancer, such as leukemia.
In summary, Hox genes are a family of regulatory genes that play a critical role in controlling the complex developmental processes of organisms. They are known for their role in determining segment placement and body plan and have been linked to evolutionary changes, developmental abnormalities, and some forms of cancer.
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can some one please confirm my answers please
Answers
Answer:
the answer above this is correct
Explanation:
Where does the mRNA go after it is produced?
Answers
Answer:
if youre talking about after transcription then...
Explanation:
it leaves the nucleus, goes to the cytoplasm, binds to a ribosome to be read
Answer:
it goes to the cytoplasm
Explanation:
binds to a ribosome to be read
Which best describes the relationship between population size carrying capacity and limiting factors
Answers
What is DNA and why is it such a big deal to change an organism’s DNA?
Answers
Answer:
DNA Stands for Deoxyribonucleic acid and is the bodys' chemical blueprint. Changeing an organisms DNA can make the organism produce too much or too little protiens and can be fatal if the mutation/chance is significant enough.
Explanation:
Create cladograms for the primates and animals groups (skip the Artiodactyla for now). These Claudio grams are a little more complex and you may have to include multiple branches at the same level such as in the example shown at the right. When you had built Cladograms with the lowest possible parsimony score compare them to the accepting Cladogram
Answers
Answer:
b
Explanation:
If RrYy is crossed with another organism with the genotype RrYy, what would be the expected phenotypic ratio of
the F1 generation
Answers
Explanation:
TRICKY Q.
ACCORDING TO ME:
P1 ---> RrYy n RrYy
F1 ----> RY , RY , ry , ry hence 1:1:2:2
IN DIHYBRID CROSS
PHENOTYPIC RATIO : 9:3:3:1 FOR F2 GENERATION
GENOTYPIC RATIO : 1:2:2:4:2:2:1:1:1 FOR F2 GENERATION
GOOD LUCK FOR FUTURE! :)
Organisms, like humans, look different because we share all the same variations of traits, but have different traits.
true
false
Answers
Answer:
true
Explanation:
It's like zebras can never have the same stripes. Nothing can be created exactly the same.
3. The sequence of nitrogenous bases is unique to each organism. The sequence of the
bases in DNA is most important for which of the following?
Answers
how might a virus infect a cell and remian inside the cell without killing it
Answers
Answer: As you've learned, some viruses are released when the host cell dies, and other viruses can leave infected cells by budding through the membrane without directly killing the cell.
Explanation:
If prey are keeping predator population sizes in check then we would consider this interaction to be
O prey abusing their position of power! Throw the bums out! Vote predator!
O top-down control
O carrying capacity control
O bottom-up control
below control
Answers
Answer:
The correct answer is C
(Bubble #3)
A confounding variable is an outside variable beyond the control of the race teams and official. What are some confounding variables that could contribute to the speed of the tracks?
Answers
Answer:
rain and turns
Explanation:
There are various confounding variables that could contribute to the speed of the track, one of which is rain. Rain is something that the race teams and officials cannot control and affects the speed at which racecars can operate on a track. This is because the Rain wets the tracks which prevents the cars wheels from properly gripping the track and instead causes them to skid. Another confounding variable would be turns. A track that has more turns would drastically decrease the speed of the tracks as cars would need to slow down for each turn.
What is the control of conditions inside the body called
Answers
Answer:
Homeostasis
Explanation:
Conditions inside our body must be very carefully controlled to function effectively.
I guess Homeostasis
Explanation:
The condition inside our body must be very carefully it the body is to function effectively. Homeostasis is the maintenance of a constant internal environment
If two goats heterozygous for coat color (Bb) are crossed, which is the probability that their offspring would have the genotype (bb)?
Group of answer choices:
A. 0%
B. 50%
C. 25%
D. 75%
Answers
Explanation: look it up
My fish its not so active all the time and im worried about him.. what shoud i do?
Answers
Answer:
You must make the fish happy and healthy
Explanation:
Making Sure Your Fish Is Adapting. Fish like most animals have their adaptability to certain environments. ...
Do It For More Than Decor. ...
Re-create A Natural Environment. ...
Keep The Water Conditioned. ...
Keep The Aquarium Clean! ...
Keep The Tank The Right Temperature. ...
Remove Excess Algae. ...
Introducing New Fish To The Aquarium
Two biological processes that occur in certain organelles are represented in the diagrams below.
**Which statement is correct regarding the types of organisms able to carry out these processes?
a. Process X occurs in heterotrophs, but not in autotrophs.
b. Process Y occurs in consumers, but not in producers.
c. Both processes X and Y occur in all living things.
d. Both processes X and Y occur in green plants.
Answers
Answer:
A
Algebra For what values of the variables must ABCD be a parallelogram?
B
23. A 2y + 2 B 24. B
(3x + 10)
(8x + 5)º
3x + 6
54°
D
С
D
A
Зу - 9 с
ly+4
Answer: The answer is D :)
Explanation: