Which of the following is a central idea of cell theory? (5 points)
All living things are made of at least two cells.
O Cells cannot live alone as single organisms.
O All living things have five or more types of cells.
Cells are the basic unit of structure and function in living things.
what genetic information can be obtained from a Punnett square? What genetic information cannot be obtained from a Punnett square?
Do you think a magnitude 9.0 earthquake will generate a tsunami?
PLEASE HELP WILL GIVE CROWN
Answer:
C E A hope it helps
Explanation:
Which is a difference between eukaryotic and prokaryotic cells? A. Nucleus, A. Cell membrane, C. Cell wall, D. Cillia
Answer:
Nucleus is a difference between eukaryotic and prokaryotic cells because nucleus is present in eukaryotes and nucleoid also called genophore / prochromosome is present in prokaryotes.
Analysis of mitochondrial DNA can answer interesting and important questions. For which of the questions would analyzing mitochondrial DNA be futile?
Answer:
to identify the father of the individual
Explanation:
Mitochondrial DNA (mtDNA) is the circular DNA molecule found in mitochondria, which is an organelle responsible for cell respiration by converting chemical energy from foods to ATP by the process of cellular respiration. In humans, mtDNA consists of about 16,500 base pairs (bp) and encodes for 22 tRNAs, 2 rRNAs and 13 proteins. In most of the species, including humans, mtDNA is inherited from the mother (i.e., it is maternally inherited), and therefore mtDNA cannot be used to trace the patrilineal ancestry of a given person or population.
An example of a renewable resource is
Answer:
solar energy
Explanation:
wind energy too
the rain shadow effect is caused by
4. Choose the correct list of five major current environmental challenges.
A. Climate change, species loss, environmental degradation, pollution, and environmental justice
B. Climate change, species loss, crime, food shortage, pollution
C. Species loss, crime, water shortages, global cooling, food shortage
D. Environmental degradation, water shortage, environmental justice, food shortage, pollution
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Answer:
The answer is A
Explanation:
A comet is a
meteoroid that travels through Earth’s atmosphere and hits the surface.
meteoroid that burns up in Earth’s atmosphere, producing a streak of light.
small, rocky object that orbits the Sun and is usually found in a belt between the orbits of Mars and Jupiter.
small object made of ice and dust that orbits the Sun and forms a coma as it approaches the Sun.
Why do you think so many people are ignorant on the topic of overpopulation and it's effects? Please answer in one paragraph (: thanks
Answer: Human overpopulation is among the most pressing environmental issues, silently aggravating the forces behind global warming, environmental pollution, habitat loss, the sixth mass extinction, intensive farming practices and the consumption of finite natural resources.
Answer:
I think they are ignorant because they don't understand what overpopulation can do to the world. Meaning overpopulation can cause less jobs for people. Less food to go around.
Explanation:
RNA is chemically similar to DNA except that its sugars have an additional oxygen atom,
and the base thymine is replaced by a structurally similar base called
Answer:
Uracil
Explanation:
Uracil is in RNA thymine is in DNA
A healthy, stable ecosystem is one in which many kinds of plants and animals -
A) Lack what they need to live
B) Produce only a few offspring
C) Are protected from all diseases
D) Are able to meet their needs
Answer:
D) Are able to meet all their needs
Explanation:
the description sounds like a pretty healthy ecosystem to me
Which of the following most nearly approaches the commonly preferred soil pH?
A pH of 8
A pH of 5
A pH of 14
A pH of 3
Answer:
I did the test and put A pH of 5 but I got it wrong so I redid the test and put
A pH of 8 and I got it right!
Explanation:
Which cells contain the most catalase: liver, apple, or potato?
Answer: I think it's the potato
Explanation:
3. Name two organelles in a plant cell that contain their own genetic material and
ribosome.
Answer:
Both, mitochondria and plastid possess their own genetic material and ribosomes.
Explanation:
If the fatty acid palmitate (16:0) radiolabeled with 14C in C-16 were metabolized by mammalian cells under anaerobic conditions, what compounds would be tagged with 14C and in what position
The options are missing from the question,
Below are the options.
A) Tag would be CO2
B) Acetate in C-2
C) 1 uvate in C-3
D) pyruvate in C-3
E) oxaloacetate on C-1
F) palmitate in C-16
The correct answer to the question is option B
ACETATE IN C-2
If palmitate (16:0) which is a fatty acid radiolabeled with 14C in C-16, when metabolized under anaerobic conditions by mammalian cells,the compound that will be tagged with 14C will be ACETATE and the position it will be will be C-2
In an anaerobic condition, anaerobic CoA which is formed after the oxidation of fatty acid will now move into the Kreb cycle as a result of oxygen deficiency, taking the form of acetate,it will enter cytosol and will further be used for other purposes.
What are the adaptations that Embryophytes have for life on land?
Answer:
Explanation:
"Plants have evolved several adaptations to life on land, including embryo retention, a cuticle, stomata, and vascular tissue."
What is one of the ways we can conserve?
A. use more nonrenewable resources
B. use products made with plants or animals from the rainforest
C. use recycling centers
c
because using recycling centers can help things be reused.
1. A student conducted research about the roles of molecules in metabolic processes
such as digestion. She found one experiment that revealed the following about a
certain molecule:
• The molecule can break down proteins into amino acids.
• The molecule itself can be broken down into amino acids.
• The molecule is found in high concentrations in the small intestines of humans.
The molecule is most likely-
Answer:
Enzyme- Peptidase/protease
Explanation:
According to this question, a student is conducting an experiment to determine the roles of molecules in metabolic processes such as digestion. Based on what she found out that the molecule, which itself can be broken down into amino acids, can also break down proteins into amino acids, this suggests that the molecule being described is a PROTEOLYTIC ENZYME.
This is because an enzyme is made up of proteins which can be denatured or broken down into its simplest unit (amino acids) and also, a substance that breaks down amino acid is said to be PROTEOLYTIC.
However, another observation that the molecule is found in high concentrations in the small intestine was made, hence, the enzyme is a PEPTIDASE OR PROTEASE, which are secreted into the small intestine by the pancreas to aid digestion of proteins.
How do was the carbon cycle most different before 1900s
Answer:
I would probably say that it was most different because of the cars. The first car was released in 1885, but they weren't really popularized in America until the 1920s. So therefore, Earth's atmosphere was much better than it is now.
Which of the following factors is most likely to decrease the stability of an ecosystem?
A
The removal of a species
B
An increase in plant biodiversity
C
The removal of an individual animal
D
An increase in animal biodiversity
Answer:
A
Explanation:
The removal of a species can reduce the food source of another species, which can cause that species to slowly die out, where other animals that consume the dying species start dying out... ect.
So it decreases the biodiversity which can mess with populations.
If the species is a herbivore, it could cause the plants that are eaten by that herbivore to get out of control in population, which can fight for sunlight and resources with other species causing ecosystem collapse.
In an ecosystem, the removal of a species can decrease the stability. Thus, option A is correct.
What are the biotic factors of an ecosystem ?Biotic factors are the basic unit of ecosystem where the living beings interact with each other and their environment.
There are two components of an ecosystem such as biotic and abiotic components, include distribution of energy in our environment.
Biotic components can be classified into autotrophs, heterotrophs and decomposers based on mode of nutrition.
Autotrophs are producer such as plants as they produce food through the process of photosynthesis.
Heterotrophs are the consumer depend on producer for their nutrient, which is further classified into three categories.
Primary consumers are herbivores rely on producers for food while secondary consumers depend on primary consumers. They can be carnivores or omnivores.
Tertiary consumers depend on secondary consumers for food. some quaternary consumers are also seen in some food chains.
Decomposers include saprophytes such as fungi and bacteria which lie on decaying organic matter and essential for the ecosystem
Hence, option A is correct.
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Fireflies emit light. The production of light by an organism is called bioluminescence. To generate visible light, cells in a firefly's tail produce thousands of luciferase enzymes. Luciferase binds to a chemical called luciferin. Once bound, the luciferase enzyme speeds up a chemical reaction that combines an oxygen molecule and luciferin to produce oxyluciferin. This reaction requires energy and releases light. Which of the following best describes how the luciferase enzyme speeds up the chemical reaction? F Luciferase increases the amount of time the light is visible. G Luciferase decreases the amount of energy required for the reaction to start. H Luciferase increases the number of sites on luciferin that must bind to oxygen. J Luciferase decreases the temperature of the environment inside the body of the firefly.
Answer:
Fireflies emit light. The production of light by an organism is called bioluminescence. To generate visible light, cells in a firefly's tail produce thousands of luciferase enzymes. Luciferase binds to a chemical called luciferin. Once bound, the luciferase enzyme speeds up a chemical reaction that combines an oxygen molecule and luciferin to produce oxyluciferin. This reaction requires energy and releases light. Which of the following best describes how the luciferase enzyme speeds up the chemical reaction?
Explanation:
b
The description that best describes how the luciferase enzyme speeds up the chemical reaction is - Luciferase decreases the amount of energy required for the reaction to start.
Fireflies generate a chemical reaction that allows their body to emit light, inside their body. This light generation is called bioluminescence. This process involves various steps:
Oxygen binds with calcium, luciferin chemical with ATP to make oxyluciferin.In the body of fireflies, there is the production of an enzyme called luciferase.This chemical reaction takes place in presence of luciferase that speeds up this reaction by decreasing the activation energy of the reaction.At the end of the reaction body of fireflies light up.Thus, the correct answer is - Luciferase decreases the amount of energy required for the reaction to start.
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The discovery of cells was made possible by the invention of microscopes. Today, several different types of microscopes are used by scientists. Which of the following best describes transmission electron microscopes? A.Transmission microscopes produce images of cell surfaces. B.Transmission microscopes produce three-dimensional images of cells. C.Transmission microscopes produce highly detailed images of cell structures. D.Transmission microscopes produce images of living cells.
Answer:
C
Explanation:
:)
The statement that best describes transmission electron microscopes is:
C.Transmission microscopes produce highly detailed images of cell structuresA microscope is the instrument that is used to view microorganism and magnify them so that they cab be visible to the human eyes.
The transmission electron microscopes are those micrpsccp[es wjich makes use of a particle beam in order to produce a well magnified image and can magnify an object uo to two million times.
As a result of this, they produce highly detailed images of cell structures.
Therefore, the correct answer is option C
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What type of pollution causes health problems primarily through decreased mental health and stress?
A. Species extinction
B. Acid rain
C. Noise pollution
D. Water pollution
Answer:
Noise pollution
Explanation:
Pure substances can be classified as or compounds. Answer here
Answer:
Elementshope it helps....
Using the above graph, look at the solid blue trendline. What is that telling us?
Group of answer choices
A. The deer population is highly unstable.
B. The deer population is reduced after the introduction of wolves.
C. The deer population and the wolf population are the same.
D. The deer population changes with the seasons.
Answer: Which of the following statements regarding the human
population are TRUE? Select TWO.
The world's population of humans is
increasing.
In every country, the human population is
increasing
In some countries, the human population is
decreasing or staying the same.
The world's population of humans is
staying constant.
Explanation: Which of the following statements regarding the human
population are TRUE? Select TWO.
The world's population of humans is
increasing.
In every country, the human population is
increasing
In some countries, the human population is
decreasing or staying the same.
The world's population of humans is
staying constant.
Which of the following statements regarding the human
population are TRUE? Select TWO.
The world's population of humans is
increasing.
In every country, the human population is
increasing
In some countries, the human population is
decreasing or staying the same.
The world's population of humans is
staying constant.
What are some examples of disturbances that lead to secondary succession
Answer:
Secondary succession occurs when the severity of disturbance is insufficient to remove all the existing vegetation and soil from a site. Many different kinds of disturbances, such as fire, flooding, windstorms, and human activities (e.g., logging of forests) can initiate secondary succession.
Explanation:
Which part of scientific design occurs when an experiment is conducted by more than one scientist to determine the validity of results?
Replication
Research
Trials
Variables
The answer is: Trials.
Trials part of scientific design occurs when an experiment is conducted by more than one scientist to determine the validity of results. Thus the correct option is C.
What is trail?Researchers gather information, group volunteers according to broad characteristics, and compare changes over time.
Repeated trials are when researchers do a measurement multiple times - at least three, commonly five, but the more the better. When they measure something once, the chance that the number he get is accurate is much lower. But if researcher measure it several times, then he can take an average of those numbers and get a result that is much closer to the truth.
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Answer:
D
Explanation:
Planets that orbit the sun is a gas giant, terrestrial, or dwarf planet.
Answer:
Terrestrial i think:)
Explanation:
A solar system is made up of a star and the planets that orbit it. Our solar system’s four inner planets—Mercury, Venus, Earth, and Mars—are closest to the sun. They are called terrestrial planets, and are largely composed of rock and metal. The four outer planets—Jupiter, Saturn, Uranus, and Neptune—are gas giants.
it's known that only 9 planets orbit the Sun. There have been many solar system objects that have been discovered recently, but none of them have been classified as planets.
Gas dwarf A low-mass planet composed primarily of hydrogen and helium.
Gas giant A massive planet composed primarily of hydrogen and helium.
