The correct answer is D. Vesalius
Explanation:
Andreas Vesalius was a Flemish scientist and anatomist that lived during the 16th century, considered as the father of modern anatomy. During this life, Vesalius studied anatomy mainly using dissection and observing the tissues, organs, and structures in them, especially those in animals and humans. Also, he used his findings and ideas to create written works that were the base for later studies in anatomy. Besides this, as compound microscopes for studying living organisms had not been created during Vesalius time, he only used regular observations different to other scientists such as Hooke or Malpighi. Thus, it was Vesalius the one that formed his ideas by performing observations without using a microscope.
A shark's skeleton is different from a goldfish because
a. the shark's skeleton is very dense.
b. the shark's skeleton is quite rigid.
c. the shark's skeleton is composed of bone.
d. the shark's skeleton is composed of cartilage.
Explain why the chromosomes in the second drawing have sister chromatids, but the chromosomes in the third drawing do not. What happened to the sister chromatids?
The chromosomes in the second drawing have sister chromatids because DNA has replicated during the S phase of interphase, resulting in two identical copies that are joined at the centromere. By the third drawing, the sister chromatids have likely separated during anaphase, making them individual chromosomes.
Explanation:The chromosomes in the second drawing have sister chromatids because during the S phase of interphase, DNA replication occurs, which results in each chromosome being composed of two identical copies. These copies, called sister chromatids, are joined together at a region known as the centromere and are visible under a light microscope in the familiar "X" shape. The absence of sister chromatids in the third drawing is likely due to the chromosomes having moved into a stage of cell division known as anaphase, during which the sister chromatids are pulled apart toward opposite poles of the cell, thus no longer existing as attached pairs but as individual chromosomes.
Because second drawing twins (chromatids) separate in phase three, becoming solo chromosomes.
Here's why the chromosomes in the second drawing have sister chromatids, but those in the third drawing don't:
Second Drawing:
* The chromosomes in the second drawing have sister chromatids because they are in the prophase stage of cell division. In prophase, DNA replication has already occurred, resulting in each chromosome being duplicated. These two identical copies stay attached at the centromere and are called sister chromatids.
Third Drawing:
* The chromosomes in the third drawing lack sister chromatids because they are in the anaphase stage of cell division. During anaphase, the spindle fibers pull the sister chromatids apart towards opposite poles of the cell. This means each chromatid becomes an independent chromosome.
Therefore, the sister chromatids in the second drawing have simply separated and moved to opposite poles in the third drawing. This separation is a crucial step in cell division, ensuring that each daughter cell receives a complete set of chromosomes.
What does it mean if a scientist fails to reject a hypothesis?
what form of carbon do plants remove from the air?
Why must organisms of the estuary be adapted to varying levels of salinity? A.Fresh river water flows into the estuary
B.Saline ocean water flows into the estuary
C.Ocean tides increase and decrease the amount of ocean water
D.All of the above
Organisms in estuaries must adapt to varying levels of salinity due to the unique environment where fresh river water and saline ocean water meet, creating varying and changing salinity levels. Fresh river water, saline ocean water, and ocean tides all contribute to these salinity changes.So, the correct answer is D. All of the above.
Explanation:Organisms in the estuary must be adapted to varying levels of salinity because of the unique factors of their environment. The estuary is a transitional zone where fresh river water meets marine or saline ocean water. This creates varying levels of salinity, which can even change with the tides. Therefore, organisms living there have to adapt to this ever-changing salinity environment.
This happens because of a combination of the factors mentioned in options A, B, and C. Fresh river water from inland sources flows into the estuary (option A), increasing the freshwater content. On the other hand, saline ocean water also flows in (option B), increasing the salinity. Furthermore, the rise and fall of ocean tides can increase and decrease the amount of saline water entering the estuary (option C). So, the correct answer is D. All of the above.
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Which of the following is an indicator of good water quality?
High levels of nitrates
High levels of phosphates
All of the above
Zero turbidity
I would think that it is B. Nitrates can be a form of pollution and D is usually from the speed of the water moving.
Answer:d
Explanation:took test
Which statement best summarizes "Save the Coral Reefs”?Coral reefs are a very important component of the ocean’s ecosystem because they support sea life, such as crabs and sea turtles. In fact, over four thousand species depend on the survival of the reefs, which are being destroyed by bleaching. More must be done immediately to save the reefs.
Development along the coastal regions has significant negative effects on coral reefs. The reefs are an essential part of the ocean’s ecosystem, and when people build structures on top of them, they are easily damaged because they are so fragile.
Answer;
-Coral reefs are a very important component of the ocean’s ecosystem because they support sea life, such as crabs and sea turtles. In fact, over four thousand species depend on the survival of the reefs, which are being destroyed by bleaching. More must be done immediately to save the reefs.
Explanation;
-Coral reefs are important for many different reasons aside from supposedly containing the most diverse ecosystems on the planet.
-They protect coastlines from the damaging effects of wave action and tropical storms ( they provide a buffer, protecting our coasts from waves, storms, and floods, helping to prevent loss of life, property damage, and erosion) and also provide habitats and shelter for many marine organisms.
Answer:
Coral reefs are a very important component of the ocean’s ecosystem because they support sea life, such as crabs and sea turtles. In fact, over four thousand species depend on the survival of the reefs, which are being destroyed by bleaching. More must be done immediately to save the reefs.
Explanation:
Fertilization occurs when _____. an organism clones itself two gametes come together and chromosomes combine binary fission takes place gametes are produced
Answer: the correct answer for the fill in the blank is- Gametes come together and chromosomes combine.
Fertilization is a process in which sex cells ( also called male and female gametes that are haploid) are fused together and form zygote ( diploid) that eventually develops into new organism.
There are two types of fertilization that is internal ( inside the body) and external fertilization ( outside the body).
The animals in the food web release _____ into the enviroment , which plants then use for ______ ?
Cells of a multicellular organism are specialized. What does this statement mean?
A.
Cells of a multicellular organism can perform all the life functions the organism needs to survive.
B.
Cells of a multicellular organism perform all life functions but not at the same time.
C.
Cells of a multicellular organism are adapted for performing a specific function.
D.
Cells of a multicellular organism are specialized because they have a complex structure.
Students on a field trip to a potato farm examine a few potatoes. Which of the following features will help them conclude that the potato is an underground stem? the presence of a swollen portion indicating food storage, which is a function of stems the presence of fine roots that develop into new plants the presence of buds located in the potato eyes, which represent the nodes
The presence of buds located in the potato eyes, which represent the nodes, will help the students conclude that the potato is an underground stem. Each 'eye' of a potato is a node where a new shoot could emerge, indicating its stem nature.
which research question about the largemouth bass and whirligig beetle would best match the scientists' observations?
a.how log do fish spend rinsing their food?
b.what is the favorite food of a larrgemouth bass?
c.which insects produce the most foul-tasting substances?
d.does the slow release of a foul-tasting substance increase survival?
Because of when the chromosomes pair up during meiosis, crossing-over must occur during
describe the role of proteins in the release of energy stored in ATP
The role of proteins in the release of energy stored in ATP is that protein is the holder of ATP that is broken down.
What are proteins?Proteins are big, complex molecules that perform numerous important functions in the body. They are essential for the structure, function, and regulation of the body's tissues and organs and do the majority of the work in cells.
Proteins are also used in the synthesis of ATP. Other than proteins, glucose, and fats synthesize energy. Proteins break down the bonds in ATP to release energy. Proteins can either form pyruvate or Acetyl Co-A and participate in aerobic respiration to produce ATP.
Therefore, proteins play a part in the release of energy held in ATP by acting as the keeper of the ATP that is broken down.
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Considering only personal water use, people in the developed world use about _____ than people in the developing world
When we consider personal water use, people in developed countries use more water compared to those in developing countries.
How is water usage in developed countries different from developing countries?In a developed country like America, the average water use by a family is about 552 gallons comparing it to an African family which uses about 5 gallons of water every day. In developing countries, women have to walk about 4 miles to fetch water. An average person needs 20 to 50 liters of water each day for cooking, cleaning, drinking, and sanitation.
Water is one of the most important resources for human health, environmental protection, poverty alleviation, sustainable development, peace and security. Yet, more than 40% of people worldwide lack access to clean water.
Water scarcity affects several sectors, such as food security. About 70% of global freshwater is used by agriculture. Water scarcity, flooding, and water quality are the primary causes of water-related diseases in developing countries. In the developing world, water-related illnesses account for up to 80%.
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A prokaryote is most likely to use which of the following modes of metabolism to release energy if it is in an environment without oxygen, dies when exposed to oxygen, and uses fermentation?
A. Photoautotroph
B. Facultative anaerobe
C. Obligate anaerobe
D. Heterotroph <---- is the right answer
The pictures below show a cave and a geyser.
Which of these statements is correct about the cave and geyser shown in the pictures?
a. Both are formed when groundwater gets heated.
b. Both are formed when groundwater reacts with the limestone in rocks.
c. The cave is formed when groundwater reacts with the limestone in rocks and the geyser is formed when groundwater gets heated.
d. The cave is formed when groundwater gets heated and the geyser is formed when groundwater reacts with the limestone in rocks.
Answer:
c
Explanation:
For a given species, an increased evolutionary rate would cause a decrease in A) biodiversity. B) fitness of a species. C) similarity of the individuals in the species. D) the number of new genes in the DNA of the species.
Answer: C) similarity of the individuals in the species
Explanation: Similarity of the individuals in the species. It would be expected that increased evolutionary rate would cause individuals in the species to resemble each other less.
Which of these is not a component of the cell membrane? question 19 answers phospholipids rna cholesterol proteins?
state the numbered position of the moon that could result in a lunar eclipse
Final answer:
A lunar eclipse occurs when the Moon enters the Earth's shadow during its full phase when the Sun, Earth, and Moon are aligned.
Explanation:
A lunar eclipse occurs when the Moon enters the shadow of Earth. This event can only happen when the Sun, Earth, and Moon are precisely aligned, meaning the Moon has to be in its full phase. During a lunar eclipse, if you imagine the Earth's dark shadow as a numbered area, the Moon must be in the number corresponding to the darkest part of the Earth's shadow. This is a necessary condition for a lunar eclipse to occur and for the phenomenon to be observable from Earth.
An eclipse of the Moon, also known as a lunar eclipse, can occur when the Sun, Earth, and Moon are in a line. The Moon enters the shadow of the Earth, causing it to darken. The numbered position of the Moon that could result in a lunar eclipse is position 1, where a total eclipse occurs.
Imagine that a chromosome contains the following chromosome order ZYXWVUT. What type of mutation happens to produce ZYXWWVVUT?
Fish, trees, and animals are important wildlife resources that we depend on for survival. Fish are a main source of food for many of the people in the world. Trees have been used to build and heat homes, make paper, and provide food for centuries. Humans hunt land animals such as deer, fox, antelope, and buffalo for food and other products. What can we do to protect wildlife resources so they will be around for future generations?
Answer:
harvest fast-growing trees, impose fishing limits, and impose laws to prevent poaching and illegal hunting
Explanation:
i got it right
Which of the following best describes a feature of the cell membrane's structure that allows molecules such as oxygen and hydrocarbons to easily cross the membrane and enter the cell?
a. The bilayer contains mostly polar molecules.
b. The interior of the lipid bilayer is hydrophobic.
c. The bilayer is embedded with transport proteins.
d. The exterior of the lipid bilayer is unsaturated.
Answer:
The interior of the lipid bilayer is hydrophobic (Ans. B)
Explanation:
The plasma membrane is selective in nature some of polar molecules and hydrophobic molecules can pass through the lipid bilayer of the cell membrane, large polar molecules and ions cannot pass through it.
By active and passive transport integral membrane proteins enables large polar molecules and ions to pass through the membrane. 3 primary factors which determine weather a molecule can diffuse through a membrane or not are : Size, Concentration and Charge.
Electrons are excited in photosystem I. With what do these electrons combine to produce an energy-carrying molecule?
A.ADP
B.Glucose
C.ATP
D.NADP+
What did robert koch discover by using the compound microscope?
If matter cannot be created or destroyed within the physical universe, then the total quantity must be _____????????
A good example of something that is biodegradable is __________.
a leaf in a compost pile
a plastic milk jug in a landfill
a plastic six-pack can holder in an estuary
a polystyrene burger container in a trash can
A biologist observes that ocean temperature decreases with increasing depth and concludes that deep sea creatures are superior animals because they can survive in harsher environmental conditions. Why is this an invalid scientific conclusion?
A. The data was not compared among several sampling sites.
B. The data did not specify the measurement system used.
C. Scientific data cannot be used to make judgments of organism superiority.
D. Scientific data cannot be used to measure temperatures that are inaccessible to humans.
if a codon in RNA was GAC, what would it's copy be?
The weather department in Richmond is forecasting a snowstorm. What is likely to happen to the barometer and thermometer readings in Richmond?
A. Barometer readings will decrease, and thermometer readings will increase.
B. Barometer and thermometer readings will increase.
C. Barometer and thermometer readings will decrease.
D. Barometer readings will increase, and thermometer readings will decrease.
E. Barometer and thermometer readings will not change.
The correct answer is option D. Barometer readings will increase, and thermometer readings will decrease.
The barometers are the devices, which are used for the measurement of the pressure and the thermometer is a device, which is used for the measurement of the temperature. During snowstorm, the temperate is decreased and the pressure is high. So, the reading on the thermometer would decreased, and the reading on the barometer would be increased.
Answer:
D.
Explanation: