When did the Paleozoic Era begin?
66 million years ago
400 million years ago
4 billion years ago
550 million years ago
The Paleozoic Era began approximately 550 million years ago and ended approximately 252 million years ago.
What is Paleozoic Era?The Paleozoic Era is a geological epoch that lasted about 541 million years and ended about 252 million years ago.
It is also known as the "Age of Invertebrates" because it witnessed the rise and dominance of numerous invertebrate groups, including trilobites, brachiopods, and ammonites.
From oldest to youngest, the Paleozoic Era is divided into six periods: the Cambrian, Ordovician, Silurian, Devonian, Carboniferous, and Permian.
Many significant events in the evolution of life on Earth occurred during this time period, including the Cambrian period's explosion of diversity, plant and animal colonization of land, and the emergence of reptiles and insects.
Thus, the answer is 550 million years ago.
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what is the temperature at which enzymes work best and worst?
Answer:
There is a certain temperature at which an enzyme's catalytic activity is at its greatest which is 37.5 oC
Enzymes are still proteins, and as with all proteins, temperatures above 104 degrees Fahrenheit, 40 degrees Celsius, will start to break them down.
Explanation:
The temperature for most enzymes is about 98.6 degrees Fahrenheit (37 degrees Celsius).There are also enzymes that work well at lower and higher temperatures.
Hope this helped!!
what type of rock can form deep below Earth's surface?
Answer:
Bedrock
Explanation:
in oretty sure it forma underground
Answer:
Igneous rocks
Explanation:
Igneous rocks that form below the Earth's surface are called intrusive igneous rocks (or plutonic). They form when magma enters an underground chamber, cools very slowly, and forms rocks full of large crystals. Igneous rocks that form above the Earth's surface are called extrusive igneous rocks.
Where do plants grow?
A. underwater
B. in the Sun
C. where plants can capture light
D. in a closed space with little oxygen
Answer:
C. where plants can capture sun light
Explanation:
Explain the process of evolution through isolation
that results in speciation.
Answer:
Speciation is the process of formation of a new genetically independent group of organisms, called species, through the course of evolution. The process of splitting of genetically homogenous population into two or more populations that undergo genetic differentiation and eventual reproductive isolation is called speciation.
Answer:
Explanation:
Evolution is a natural phenomenon by which inheritable characteristics of a species change over generations. It mainly relies on processes such as natural selection, genetic drift, migration, and mutation. ... Isolation (geographical or reproductive) prevent the flow of genetic material between the populations.
PLEASE PLEASE PLEASE HELP ME WITH THESE 4 QUESTIONS!!!!!!!!!!! PLEASE
Answer: they are blurry
Explanation:
Which molecules do cells need to release energy? (Can you make it look like 7th grade writing please well if you can)
Answer:
Cells need oxygen and glucose.
Without oxygen, electron transport chain cannot take place and the cells cannot get the energy they need (since the cell uses oxygen to break down glucose which os what produces energy). When the cells cannot perform their function, they die.
FIRST TO ANSWER 15 POINTS PLUS BRAINLIEST What is a benefit of Nuclear Energy?
Answer:
Explanat}
there is long term storage for nuclear waste
Because burning fossil fuels creates much pollution, alternatives are being investigated. What might limit the use of wind as a major energy source?
Answer:
There isn't wind all the time, so wind being used as a major energy source is very unlikely.
Answer:
there isnt always a lot of wind so it wouldnt be a reliable energy source
Explanation:
Which of the following processes causes the webbing to disappear?
Choose 1 answer:
А. Mitosis
B. Meiosis
C.Apoptosis
D.Fertilization
The answer is (A. mitosis)
What can make someone feel good, feel bad, and sometimes both?
saying good things like your so smart and your an angle and saying bad is your a devil
Answer:
eating, studying, taking care of yourself, taking drugs, falling in love when its a wrong time for it, being mean to parents
Explanation:
How is it possible for a mutation not to produce any visible effect in an
organism?
Answer:
Some mutations don't have any noticeable effect on the phenotype of an organism. This can happen in many situations: perhaps the mutation occurs in a stretch of DNA with no function, or perhaps the mutation occurs in a protein-coding region, but ends up not affecting the amino acid sequence of the protein.
POST-lab Question:
Most biological adaptations are specific to a certain habitat, and will not provide an advantage to
an organism that moves outside this environment. What evidence have you
seen in this lab that
would support this idea?
Answer:
me
Explanation:
becesu im the best guy
Science is the systematic study of
Answer: From internet put it in your own words . Hope this helped
Explanation: "Science is the intellectual and practical activity encompassing the systematic study of the structure and behavior of the physical and natural world through observation and experiment
A(n)\ is a system composed of living organisms and their interaction with the surrounding environment, where the main focus is the interaction and relationship between species .
1.habitat
2.biome
3.environemnt
4.ecosystem
Grass
Tree
Figure 34
Which of the following is a food chain in the food web shown in Figure 3-4?
A)
tree, rabbit, hawk, snake
B)
grass, grasshopper, frog, snake
grass, caterpillar, robin, hawk
D)
tree, deer, mountain lion, fox
Bacteria are capable of
reproducing quickly. Explain how
this adaptation is beneficial in
their ability to become resistant
to antibiotics
Answer:
Antibiotics, also known as antimicrobial drugs, are drugs that fight infections caused by bacteria. Alexander Fleming discovered the first antibiotic, penicillin, in 1927. After the first use of antibiotics in the 1940s, they transformed medical care and dramatically reduced illness and death from infectious diseases.
The term "antibiotic" originally referred to a natural compound produced by a fungus or another microorganism that kills bacteria which cause disease in humans or animals. Some antibiotics may be synthetic compounds (not produced by microorganisms) that can also kill or inhibit the growth of microbes. Technically, the term "antimicrobial agent" refers to both natural and synthetic compounds; however, many people use the word "antibiotic" to refer to both. Although antibiotics have many beneficial effects, their use has contributed to the problem of antibiotic resistance.
Antibiotic resistance is the ability of bacteria or other microbes to resist the effects of an antibiotic. Antibiotic resistance occurs when bacteria change in some way that reduces or eliminates the effectiveness of drugs, chemicals, or other agents designed to cure or prevent infections. The bacteria survive and continue to multiply causing more harm.
All of the humans in a particular city would be considered a population. True or False?
Answer:
The Answer is gonna be True:3
This is the right Answer :3
I hope you are having a great day ❤️❤️❤️❤️❤️
Select the correct answer from the drop-down menu. What are the two specific concerns of species diversity? Species diversity is concerned with both A, species survival
B, species richness
C, species growth rate
D, species demographic and A, evenness of species abundance
B, species survival
C, species growth rate
D, species gender
Answer:
The answer above was wrong. Maybe it wanted it put in a different way but don’t do what i did
Explanation:
Plato
The two specific concerns of species diversity are species survival and evenness of species abundance. The correct options are A and B.
What is species diversity?"Species diversity is defined as the number of different species present in an ecosystem and their relative abundance." When all of the species present are equally abundant in the area, diversity is greatest.
Species diversity is a measure of the number of different species found in a given ecosystem or habitat.
It is critical to be concerned about species survival because the extinction of a species can have a negative impact on the entire ecosystem.
Furthermore, the evenness of species abundance is important to consider because the dominance of one or a few species can have a negative impact on the diversity and stability of an ecosystem.
Thus, the correct options are A and B.
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Write the complementary base sequences below each given base (please someone help me)
AGTTACGA. CAGCCTTG. ATTAGCCT
Answer:
TCAATGCT. GTCGGAAC. TAATCGGA
Explanation:
Matching base pairs in a nucleic acid sequence may form a double-stranded structure.
C-A-T-G with a complementary base would be is G-T-A-C.
Ivan is interested in becoming an engineer in the field of improving communication technology. He hasn't yet decided if he wants to focus more on the hardware or software side of the technology.
What would Ivan be studying if he focused on software?
A. the soft parts of the technology, such as the rubber coating around the wires
B. the antenna within the technology that sends and receives the data
C. the computer that runs the physical parts of the technology
D. the programming that makes the physical parts of the technology run
Answer:
van is interested in becoming an engineer in the field of improving communication technology. He hasn't yet decided if he wants to focus more on the hardware or software side of the technology. What would Ivan be studying if he focused on software? ... the antenna within the technology that sends and receives the data.
Explanation:
Ivan would need to study the programming that makes the physical parts of the technology run if he focused on software. Thus, the correct option for this question is D.
What is Communication technology?Communication technology may be defined as a type of modern technology that transfers specific information among people within a fraction of a second and/or machines through the utilization of technology.
The software side of technology deals with all sorts of programming and its languages that make it possible to run physical parts of the technology. This side of the technology develops methods, programming languages, and tools to assists in exploring the function of physical parts.
Therefore, the programming that makes the physical parts of the technology run will the primary focus of Ivan if he focused on software. Thus, the correct option for this question is D.
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Explain how a carbon atom from a CO2 molecule in the air can end up as a carbon atom in a protein in a plant cell
Answer:
Photosynthesis and metabolism are among the most complex areas in biology so given the nature of this forum I've kept the answers simple and brief.
Carbon is of central importance to all biological systems due to its special bonding properties allowing it to form various bonds with other atoms and produce a wonderfully complex range of molecules used by life.
In photosynthesis inorganic carbon in carbon dioxide gas is fixed to hydrogen to produce sugar, an organic molecule. In this case the carbon gains electrons so it is 'reduced' and this process requires energy in the form of light. Once in sugar form, the process can be reversed and the carbon can be oxidised back into carbon dioxide during cellular respiration, releasing energy.
So in photosynthesis, the carbon from carbon dioxide is reduced to form a sugar molecule. When transitioning to respiration, the carbon in the sugar is oxidised to form carbon dioxide again in the reverse reaction to photosynthesis.
The carbon is transferred between molecules through various intermediate steps during these processes, involving enzymes (biological catalysts) to assist in cleaving specific bonds at each stage. During cellular respiration (an energy release reaction) as the carbon is successively oxidised electrons are liberated that are used as part of the energy release. These electrons are captured or 'carried' by special organic molecules called NAD and FAD (reducing them) which in turn can then be oxidised to produce the universal energy currency of life: ATP molecules. ATP is a small bio molecule containing a high energy phosphorous bond that can be broken to release energy to do cellular work. It is used by all life that we know of and is the ultimate product of cellular respiration.
The carbon atom in a CO₂ molecule in the air can become a part of the
cellulose molecule in a plant by the carbon dioxide molecule reacting with the water during photosynthesis to form Glucose.
This formula can use for the reaction: 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂
The glucose molecule formed is then translocated to other parts of the
plants which are such as the roots and stems and help in the formation of cellulose.
Also, aThis is basically how the carbon atom in carbon dioxide becomes a cellulose molecule.Learn more about:
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how does the effectiveness of hand washing show the major function of the integumentary system?
Answer:
Handwashing with soap removes germs from hands. This helps prevent infections because People frequently touch their eyes, nose, and mouth without even realizing it. Germs can get into the body through those said body parts and make us sick.
Hope i answered your question! xoxo
Do catfish have hair?
a. yes
b. no
Answer:
no they do not have hair, even tough it may look like they have hair its only pieces of skin.
Explanation:
Catfish do not have hair. They have barbels, which are long, thin feelers that are used to sense their surroundings. Hence option B is correct.
The barbels are covered in taste buds, which allow the catfish to taste the water and find food. Hair is made of keratin, which is a protein. Catfish do not have keratin in their skin, so they cannot grow hair.
However, some catfish species have barbels that are covered in small, hair-like projections. These projections are not actually hair, but they are similar in appearance.
Therefore, option B) No is correct.
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transforms one strand of nucleic acid into two sets so that each set may be passed on to daughter cells in cell division
Answer:
If you`re asking what the term for this definition is, it`s DNA replication
Explanation:
Answer:
DNA Replication
Explanation:
In molecular biology, DNA replication is the biological process of producing two identical replicas of DNA from one original DNA molecule. DNA replication occurs in all living organisms acting as the most essential part for biological inheritance. Additionally, Walther Flemming's drawing of chromosomes. This process involves replication of the cell's chromosomes, segregation of the copied DNA, and splitting of the parent cell's cytoplasm. The outcome of binary fission is two new cells that are identical to the original cell.
Write down FOUR steps in growing bacteria cultures
Answer: Bacteria reproduce when one cell splits into two cells through a process called binary fission. Fission occurs rapidly in as little as 20 minutes. Under perfect conditions, a single bacterium could grow into over one billion bacteria in only 10 hours!
Hope this helps :3
Explanation:
https://learning-center.homesciencetools.com/article/bacteria-experiment-guide/
Answer:
What bacteria needs to grow and multiply:
Food (nutrients)
Water (moisture)
Proper temperature.
Time.
Air, no air, minimal air.
Proper acidity (pH)
Salt levels.
Can i have a brainliest pleaseee:)
I'll mark brainliest
Answer:
The box on top of warm, moist air rising goes first. Next is the Rain shadow effect. Then lastly air cooling and condensing.
Explanation:
Which of the following body systems work together for support, protection, and movement?
A. respiratory and cardiovascular
B. skeletal and muscular
C. skeletal and integumentary
D. digestive and respiratory
Answer:
B
Explanation:
The skeleton helps in support and movement...
hope this helps
Which best matches objects that a scientist would include on a list describing a forest ecosystem?
different types of animals and plants and the forest soil
O one animal species, the soil, water, and nutrients
o hall the living things in the forest ecosystem
O different types of soil, rocks, and water sources in the forest
Answer:
all the living things in the forest ecosystem
What expression represents chromosome numbers during fertilization?
Answer:
n + n = 2n I think.