Answer:
Every population experiences genetic drift, but small populations feel its effects more strongly. Genetic drift does not take into account an allele's adaptive value to a population, and it may result in loss of a beneficial allele or fixation (rise to 100% frequency) of a harmful allele in a population.
Explanation:
Which type of mining is likely the least harmful to the environment?
Answer:
Placer mining can be less damaging to the environment than surface mines, as the sediment is returned to the water after the minerals have been extracted.
Explanation:
What is the weather like at a front boundary?
Answer:
Because a stationary front marks the boundary between two air masses, there are often differences in air temperature and wind on opposite sides of it. The weather is often cloudy along a stationary front, and rain or snow often falls, especially if the front is in an area of low atmospheric pressure.
Will give 100 points and brainlest to do this assignment
Answer:
oki
Explanation:
Why do scientists believe that some tectonic plates are moving away from each other?
Please help me answer these two questions. Thanks
Answer:
2nd Answer: Animal would not be able to dive as long
The seal
Explanation:
Please give me BRAINLIEST and THANKS lol <(￣︶￣)>
AG CLASS HELP!!!!!!
Disney World employees 750 horticulturists and 30 nursery professionals to keep the parks 4,000 acres meticulously groomed.
True
False
Answer: True
Explanation:
U can add 750 to 30 and see how much u get and add that number to 4,000 and see how many acres meticulously were groomed.
1 pts
Question 9
Which of these is an example of biomass energy?
O A coal-burning generator.
O A gasoline-burning automobile.
O A wood-burning stove.
O An automobile that operates on fuel cells.
How can genes be turned on and off?
Answer:
please give me brainlist and follow
Each cell expresses, or turns on, only a fraction of its genes at any given time. The rest of the genes are repressed, or turned off. The process of turning genes on and off is known as gene regulation.
12. Traits are determined by the proteins that are synthesized according to instructions coded in DNA. Which sequence of biomolecules is responsible for the coded instructions?
A enzymes
B nucleotides
C glycoproteins
D carbohydrates
Answer:
B. nucleotides
Explanation:
Genetics can be defined as the scientific study of hereditary in living organisms such as humans, animals and plants.
A nucleotide can be defined as an organic molecule which forms the building block of nucleic acid such as deoxyribonucleic acid (DNA) and ribonucleic acid (RNA).
Deoxyribonucleic acid (DNA) is an organic complex-molecular structure found in all living organisms. It comprises of genes and is essentially the foundation block of all living organisms such as humans, animals and plants.
Basically, nucleotide comprises of the following parts;
1. Nitrogenous base: this includes adenine (A), thymine (T), guanine (G), and cytosine (C) which are mainly found in the DNA while adenine (A), guanine (G), uracil (U) and cytosine (C) are found in the RNA.
2. A phosphate group.
3. A penrose sugar: it is either deoxyribose in DNA or ribose in RNA.
The two parts or chemical components of a nucleotide which do not change throughout the structure of DNA are;
I. Five-Carbon Sugar also known as deoxyribose and it has hydrogen on its second carbon.
II. Phosphate: this is the structural backbone that provides support to DNA.
In conclusion, the proteins which are mainly synthesized based on the genetic instruction codes in deoxyribonucleic acid (DNA) determines the trait of living organisms. A sequence of biomolecules which are responsible for this coded genetic instructions in all living organisms is known as nucleotides.
Jan drew a diagram to compare centipedes and millipedes. Which belongs in the area labeled Y?
A.are active predators
B.have two pairs of legs on each segment
C.use specialized mouthparts to attach to hosts
D.use claws to inject venom
Answer:
BBB millipedes have two sets of legs on each segment.
Explanation:
i took the test.
Answer:
B.have two pairs of legs on each segment
Explanation:
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What happens when a person of blood type B receives blood type A?
Answer:
the white blood cells in your body would attack, in this case blood type A blood cells.
Explanation:
this happens because your body believes that the opposing blood type is bacteria, and is trying it kill you
reproductive isolation occurs when
Answer:
Reproductive isolation can occur when individuals or the populations exhibit differences in the timing of various activities like mating and so on .
Which of the following is an example of predation?
Organism A benefits, Organism B is unaffected
Organism A benefits, Organism B benefits
Organism A benefits, Organism B is harmed
Organism A is unaffected. Organism B is unaffected
1. Which of the following solid substances could be classified as the most dense?
A. Solid A
B. Solid B
C. Solid C
D. It cannot be determined from the given information.
Choose The Correct one answer.
Which statement describes the best evidence that two species share a recent common ancestor?
A) The species are about the same size.
B) The species eat the same type of food.
C) The species live in the same ecosystem.
D) The species have similar DNA sequences.
Answer:
I hope this helps you :)
Explanation:
Homologous structures provide evidence for common ancestry, while analogous structures show that similar selective pressures can produce similar adaptations (beneficial features). Similarities and differences among biological molecules (e.g., in the DNA sequence of genes) can be used to determine species' relatedness.
The statement that describes the best evidence that two species share a recent common ancestor is that the species have similar DNA sequences, which is present in Option D, as the DNA is the genetic material.
What role does the DNA sequence play in evolution?DNA sequence comparisons have become an increasingly important tool in determining evolutionary relationships between organisms, and after comparing the DNA sequences of different organisms, scientists can determine the degree of similarity between them such as similarities in size, diet, or ecosystem may indicate some degree of similarity between two species, but they do not necessarily provide evidence for a recent common ancestor.
Hence, the statement that describes the best evidence that two species share a recent common ancestor is that the species have similar DNA sequences, which is present in Option D.
Learn more about the DNA sequence in evolution here.
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PLEASE HELP !! ILL GIVE BRAINLIEST *EXTRA 40 POINTS* DONT SKIP :(( .!
Answer:
C
Explanation:
Animals that don't adapt to their new environment die
During the rock cycle, ______________ follows erosion. *
Answer:
deposition
Explanation:
Hope this helps and have a great day!!!!
[tex]\small\sf{During\: the\: rock \:cycle, \:{\underline{\bf{\red{\:\:\:\:Deposition\:\:\:\:}}}}follows\: erosion.}[/tex]
what is the strongest known poison that is undetectable completely
Answer:
The strongest known poision that is undectable completely are:
Arsenic,Cyanide, Thallium
Traits or structures that likely developed from common ancestors are called _______ structures.
Answer:
I believe these are called homologous structures.
Explanation:
Homologous structures are similar to each other and likely descend from common ancestors.
2. A chef pours a cup of rice into a pot of boiling water and observes the rice swirling around in the plot. Which of the following explains the cause of this motion?
A. Heat transfer by radiation makes the rice vibrate.
B. The rice is carried along by conduction.
C. The chef stirred the pot before the rice was added.
D. The rice is carried along by convection currents.
Choose one correct answer.''
Answer:
D
Explanation:
Not A > Radiation comes from the sun
Not B > Conduction involves direct contact with a heat-conducting object (if the rice were to
Not C > Irrelevant to heat transfer
Need help asap explain how scientists can use spectra to determine substances on another planet is what it says at the bottom
You can use spectra to determine substances on another planet is what it says at the bottom. This explains how scientists can use spectra to determine.
Plz help asap 1 and 2 plz
Answer:
1- Ans:Molecules
2- Ans:Atoms
PLEASE ANSWER FAST
Which type of nerve cell receives messages from the environment?
A. Interneuron
B. Outer nerve cell
C. Motor neuron
D. Sensory neuron
Answer:
D. Sensory Neuron
Explanation:
Sensory neurons are the nerve cells that are activated by sensory input from the environment.
Answer:
D. sensory neurone
Explanation:
sensory neurone receives information via their receptors, which are part of the peripheral nervous system, and convert this information into electrical impulses.
Question 5 (5 points)
Plants and animals are both in the domain Eukarya - how are they similar?
| a)
Both have prokaryotic cells
| b)
Both are autotrophs
10
Both are heterotrophs
d)
Both have eukaryotic cells
А
B
0а
Oь
Ос
Od
C
D
Answer:
D) both have eukaryotic cells
Explanation:
Animals and plants are classified as Eukarya because they are eukaryotic meaning they have a nucleus. However, this doesn't mean that they get food the same way
g Sickle-cell anemia arises from a mutation in the gene for the beta chain of human hemoglobin. The change from a GAG to a GTG in the mutant eliminates a cleavage site for the restriction enzyme MstII, which recognizes the target sequence CCTGAGG. These findings form the basis of a diagnostic test for
Answer:
The sickle-cell gene.
Explanation:
The sickle cell mutation is in the gene encoding the β subunit. The sickle cell gene is located on the short arm (p) of chromosome 11, at position 15.5. Sickle cell anemia is a genopathy caused by a single mutation that results in the substitution of an amino acid in the β chains of the tetrameric protein hemoglobin. It characterized by the presence of sickle cells in the bloodstream, which are red cells or sickle-shaped erythrocytes. This form causes difficulty in the circulation of red blood cells. Confirmation of sickle cell anemia is obtained through tests that determine the presence and relative amount of hemoglobin S in a blood sample, that is, by checking the phenomenon of sickle cell disease, in a drop of blood between the slide and covers objects, or the presence of hemoglobin S by means of electrophoresis.
Rhesus monkeys are more closely related to rabbits than they are to horses. (B) Horses and cows have identical amino acid sequences in their cytochrome c. (C) Humans are more closely related to rabbits than they are to rhesus monkeys. (D) Plants and animals have no similarities at all. (E) Mammals are more closely related to reptiles than they are to fish.
Complete question:
A scientist used the amino acid sequence of cytochrome c in different species to consider evolutionary relationships.
The data below summarizes the numbers of differences in the amino acid sequences of cytochrome C found in the selected species
Species compared Number of differences
Human-chimpanzees 0
Human-Rhesus monkeys 1
Human-Horses or Donkeys 7
Human-Cow, Pigs or sheeps 7
Human-Rabbits 7
Mammals-Birds and reptiles 10-15
Mammals-Fishes 18-20
Mammals-Plants 45-48
Interpretation of the data supports which of the following statements?
(A) Rhesus monkeys are more closely related to rabbits than they are to horses.
(B) Horses and cows have identical amino acid sequences in their cytochrome c.
(C) Humans are more closely related to rabbits than they are to rhesus monkeys.
(D) Plants and animals have no similarities at all.
(E) Mammals are more closely related to reptiles than they are to fish.
Answer:
(E) Mammals are more closely related to reptiles than they are to fish.
Explanation:
So, what you need to do here is to compare the number of differences found in each comparison. Remember that this information is only regarding cytochrome C. For instance, we can see that between humans and chimpanzees, the number of differences is 0. Their amino acid sequences do not differ at all. On the contrary, the comparison of mammals and plants threw a value of 45-48 differences, meaning that they are very different from each other, almost 50%.
So, this is how you need to interpret the values of the differences in this table. Now, let us go to the options,
(A) Rhesus monkeys are more closely related to rabbits than they are to horses. Rhesus monkey was not compared to any group other than humans, so we could not say that they are more related to one animal or the other.
(B) Horses and cows have identical amino acid sequences in their cytochrome. When comparing humans with horses and then humans with cows, the number of differences was the same -7-. But these results do not indicate which are the differences. Remember that we are comparing amino acid sequences, so probably the number of differences of each group with humans is the same, but the amino acid sequences between horses and cows are not.
(C) Humans are more closely related to rabbits than they are to rhesus monkeys. Humans and rhesus monkeys express only one difference in the amino acid sequence, while humans and rabbits exhibit seven differences. This result means that humans are more closely to rhesus monkeys related than they are to rabbits.
(D) Plants and animals have no similarities at all.
As we mentioned before, plants and mammals have a difference of almost 50% in their amino-acidic sequences. It does not mean that the other 50% is also different.
(E) Mammals are more closely related to reptiles than they are to fish.
The amino acid sequence of mammals and reptiles show 10-15 differences
The amino acid sequence of mammals and fish show 18-20 differences
So yes, mammals seem to be more related to reptiles than to fishes because the number of differences with reptiles is fewer.
What might be limiting resource for sharks in their ecosystem
Answer:
Sharks keep ocean ecosystems in balance
Sharks limit the abundance of their prey, which then affects the prey of those animals, and so on throughout the food web. Because sharks directly or indirectly affect all levels of the food web, they help to maintain structure in healthy ocean ecosystems. HOPE THIS HELPS!!!!!!!!
Explanation:
Examine the photographs of 16 species of anole lizards and sort them into as many groups as you want according to how they appear in the photographs. Explain how you grouped the lizards and your rationale for the various groupings. If you picked a body feature, speculate about the advantages or disadvantages of such a body feature in the environment that species occupies.
Answer:
On the basis of physical appearance.
Explanation:
We grouped the lizards into various groups on the basis of similarities and differences in the body structure, appearance and colour etc. The legs of anole lizards are small legs with pads on their feet for gripping surfaces which give them the advantage to climb up the trees while on the other hand, these small legs can't help in the survival on the land because they can't run too fast from their predators with these short legs so these legs has benefit in climbing the tree but disadvantage in running on the land.
please I need help! will give brainlist
1. What types of geological events or changes occur at divergent plate boundaries?
2. What types of geological events or changes occur at convergent plate boundaries?
3. What types of geological events or changes occur at transform plate boundaries?
Answer:
1. Seafloor spreading, Volcanoes, earthquakes, and ocean formation.
2. Island chains, mountains, earthquakes, and volcanoes.
3. Earthquakes, faults, and volcanoes.
Explanation:
What is the benefit of an arthropod’s exoskeleton.
Question 5 options:
A. It allows arthropods to breathe.
B. It protects and supports the arthropod’s body.
C. It allows the arthropod to get food.
D. It allows the arthropod to see far distances.
Answer:
B
Explanation:
Beyond support, the exoskeleton provides protection against predators and strength against prey. And it protects arthropods from the environment, for example, keeping ocean-dwellers from being affected by small changes in saltiness and preventing land-dwellers from drying out.