Final answer:
Fins or flippers are the physical feature of the manatee that allows it to live in water, aiding in movement and stability within its aquatic environment.
Explanation:
Identifying an external physical feature of the manatee that allows it to live in water: fins or flippers are critical for the manatee's aquatic life. These appendages serve as adaptations that enable manatees to efficiently propel themselves through their aquatic habitat, facilitate maneuvering, and maintain stability in the water, which are essential for an aquatic mammal like the manatee. Unlike fish that have gills to 'breathe' oxygen in water, manatees must surface to breathe every so often. However, fins or flippers are more related to swimming in water than the manatee's need to breathe air.
Some other adaptations in different aquatic animals include gills in fish, streamlined bodies to minimize water resistance, and specialized muscles for movement. This contrasts with manatees, which rely on fins or flippers for locomotion and do not have gills since they are mammals and need to surface for air. Manatees also have other features, such as a thick layer of blubber for insulation and eyes adapted for underwater vision, which also support their life in aquatic environments. Hence, the correct answer is C. Fins or flippers.
Fill in the blank: Most fossils form when living things die and are buried by_______ that hardens into rock over time.
Um homem e uma serpente podem pertence a mesma população? e a mesma comunidade?
Which of the following statements is true about the structure of the cell membrane?
Kevin has a very detailed model of the solar system where each planet is made out of granite rock. Since his little sister really liked the model, he spent two weeks in his dad's workshop building her a Styrofoam copy. When he picked up the models to take them back inside the house, which physical property would he immediately notice upon picking them up?
Refracting telescopes got their name because they refract or ?
A natural or artificial body that revolves around a celestial body of greater mass is called a(n) _______.
A natural or artificial body that revolves around a celestial body of greater mass is called a satellite.
What is a satellite?A satellite or artificial satellite is an object intentionally placed into orbit in outer space. Except for passive satellites, most satellites have an electricity generation system for equipment on board, such as solar panels or radioisotope thermoelectric generators.
Moreover, there are hundreds of satellites in operation. They are used for diverse purposes such as weather forecasting, television signal, amateur radio and internet communications and the Global Positioning System.
Therefore, they are also used to look outward at the solar system for research and data gathering purposes.
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Which of these statements is true?
RNA codes for DNA which codes for proteins.
DNA codes for proteins which codes for RNA.
DNA codes for RNA which codes for proteins.
RNA codes for proteins which code for DNA.
Answer:
DNA codes for RNA which codes for proteins.
Explanation:
The central dogma of molecular biology describes the flow of genetic information:
A single strand of DNA is transcribed into RNA by a mechanism called "transcription". Subsequently, this RNA is translated into proteins by a process referred to as "translation"
What is a benefit of using technology to transport water?
D) Cities can be built in uninhabitable places
Methods for Transportation of water can be:
Aqueducts, which include pipelines, canals, tunnels and bridges.
Water transportation impacts every state, even those that do not border a navigable river or coast due to the volume of cargo that comes in and out of our country via water. An astonishing two billion tons of domestic and international cargo travels through ports and on waterways.
Thus, the benefit out of the following options for using technology to transport water is that cities can be built in uninhabitable places, i.e. option D.
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How does primary and secondary succession change ecosystems? Can you provide an example?
why is it important for DNA to be duplicated before mitosis?
DNA replication is vital before mitosis to ensure that each resulting daughter cell gets an identical copy of the DNA. Cell cycle checkpoints ensure that DNA duplication occurs without errors or mutations. This is especially important in sexual reproduction and during meiosis.
Explanation:DNA duplication, or DNA replication, is crucial before mitosis, which is a type of cell division. This process ensures that each resulting daughter cell receives an identical copy of the DNA so they can function correctly. The DNA replication happens during the synthesis phase or S phase of the cell cycle, prior to mitosis or meiosis.
To ensure that the DNA duplication happens without any errors leading to mutations, the cell has internal control mechanisms called checkpoints. These checkpoints confirm that conditions are favorable for progression to the next stage in the cell cycle and prevent compromised cells from further divisions.
The goal is to produce daughter cells that are exact duplicates of the parent cell. Hence, the DNA replication plays a critical part in sexual reproduction by providing every new cell a correct copy of DNA during cell division. This importance is highlighted during meiosis, where DNA replication precedes the two rounds of nuclear division, resulting in four daughter cells, each with half the number of chromosomes as the parent cell.
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Which of the following is not a physical change?
glass breaking
iron rusting
ice melting
help pls
The Cat Has Fleas . The Cat Is A ___ .
1. parasite
2. mimic
3. host
4. predator
What is the wave speed of a wave that has a frequency of 100 hz and a wave length of 0.30m?
Which occurrence represents an example of evolution
Examples of evolution include the variation in the peppered moth's color, the similar winter adaptations of the unrelated arctic fox and ptarmigan, and changes in the beak shapes of Galápagos finches due to natural selection.
Explanation:Examples of evolution can be seen in various forms. One of the classic examples often used in biology textbooks is the peppered moth. Changes in the population's allele frequencies in light and dark forms, which represents small-scale evolution, could be traced back to this species.
Another example of evolution is the evolutionary convergence observed in unrelated species sharing the same environments. The arctic fox and ptarmigan, though not related, adapt to white phenotypes during winter to blend with the snow and ice, a testament to similar selection pressures.
Additionally, the Galápagos finches offer an illustration of evolution through natural selection. Shifts in the distribution of beak shapes from one generation to the next, caused by variations in environmental conditions, show how traits passed on can influence survival and reproduction.
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What country has more coal reserves than any other country in the world
what is the difference between an element and a compound?
if the mother is heterozygous and the father is heterozygous what is the genotype probabilities?
When both parents are heterozygous for a trait, the offspring have an equal chance of inheriting the four possible genotype combinations 'AA', 'Aa', 'aA', or 'aa'. Phenotypically, this equates to a 3:1 ratio of dominant to recessive traits. The probability of an offspring exhibiting the dominant phenotype is 3/4, and for the recessive phenotype, it's 1/4.
Explanation:If both the mother and the father are heterozygous for a trait, we can use the product and sum rules to calculate the genotype probabilities. In this scenario, we can adopt a method known as a Punnett Square to visualize the possible outcomes. Consider each parent can donate one of two different alleles. Let's denote these alleles as 'A' and 'a'.
Because each parent is heterozygous ('Aa'), the possible allele combinations for the offspring are: 'AA', 'Aa', 'aA', or 'aa'. Each of these combinations, representing the different genotypes, have equal likelihood of occurring. Therefore, the offspring show a genotypic ratio of 1 AA: 2 Aa :1 aa.
Now considering phenotype, the 'AA' and 'Aa' combinations would exhibit the dominant phenotype, and 'aa' would exhibit the recessive phenotype. Hence, if we apply the sum rule of probability, we expect the offspring to show a phenotypic ratio of 3 (dominant):1 (recessive). This means, the probability of an offspring exhibiting the dominant phenotype is 3/4 and the recessive phenotype is 1/4.
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in ecology, PPDF stands for
Pathogenic organisms do not include _____.
bacteria
viruses
rickettsiae
ticks
Who do the animals in an ecosystem mainly acquire the sun' s energy
Which of the following remains relatively constant in an ecosystem?
Answer:
the amount of matter
Explanation:
study island
The transfer of energy that occurs when molecules bump into one another is called ____.
Write at least one sentence for each. What is a winter storm Advisory?
which of the following is responsible for transporting oxygen throughout the body
What is a kangaroo rat?
Primary Producer
Secondary Producer
Primary Consumer
Secondary Consumer
A kangaroo rat is a Primary Consumer. It is a small rodent that lives in arid regions, named for its resemblance to kangaroos in its hopping movement. It primarily feeds on plant material, making it a primary consumer in the food chain.
Explanation:Kangaroo rats are small rodents that live in arid regions of the United States and Mexico. They are named 'kangaroo rats' because of their large hind feet and long tails, which enable them to hop like kangaroos.
As for their position in the food chain, kangaroo rats, like all herbivores, are primary consumers. This means that they predominantly feed on seeds, leaves, stems, and other plant material. This plant material is produced by primary producers (plants), and the kangaroo rats, in turn, provide a food source for secondary consumers (predators).
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Obsidian is a rock with glass-like characteristics. Obsidian is formed by rapid what and why?
(a) weathering
(b) erosion
(c) cementation
(d) cooling
Why would a long taproot be beneficial for large woody dicot such as a tree?
A long taproot benefits large woody dicots, like trees, by accessing deep water, storing food, anchoring the tree firmly, and efficiently using soil nutrients.
Benefits of a Long Taproot for Large Woody Dicots
A long taproot is highly advantageous for large woody dicots, such as trees, due to several reasons:
Deep Water Access: A taproot can penetrate deep into the soil, reaching water sources that are inaccessible to other plants, which is crucial for survival during droughts.Food Storage: The large central root can store significant amounts of food and water, providing energy reserves during unfavorable conditions.Anchorage: The strong primary root anchors the tree firmly into the ground, helping it resist strong winds and preventing uprooting by herbivores.Soil Quality Utilization: Secondary roots branching from the taproot can exploit high-quality soil areas, maximizing nutrient and moisture uptake.This root system ensures the tree's robustness and longevity in varied environmental conditions.
Explain the important role pioneer species play in succession
Pioneer species are the first plants and animals to colonize an area that has been disturbed or newly formed, and these species are adapted to harsh environmental conditions such as high winds, harsh temperatures, a lack of nutrients, etc.
What is the pioneer species?The important role of pioneer species in succession is that they prepare the way for other species to establish themselves in the ecosystem and help to break down rocks and other materials, making the soil more fertile and hospitable for other plants to grow. They also help to trap sediment and organic matter, creating a layer of soil that can support other types of vegetation.
Hence, pioneer species are the first plants and animals to colonize an area and are adapted to harsh environmental conditions such as high winds, harsh temperatures, a lack of nutrients, etc.
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Wich of the following is not a major characteristic used to identify minerals
hermit crabs live in shells made and then abandoned by snails