I need help with this question
Answer:
Carboniferous period.
Explanation:
What is the difference between the cloud model of the atom and the modern model?
Bohr's model treats electron energy levels as clearly defined orbital paths around the nucleus like planets orbit the Sun. The cloud model treats the energy levels as probability clouds, regions in which electrons are likely to be found.
help plsssss Thomson's contribution to the atomic theory was the discovery that negatively-charged electrons were embedded within a positively-charged "soup". Later on, Rutherford performed the gold foil experiment which altered Thomson's contribution. What were the conclusions of Rutherford's Gold Foil Experiment? Group of answer choices
The atom is made up of mostly empty space with a tiny, dense, positively-charged nucleus.
The atom is mostly empty space, with negative charge concentrated at the center.
The atom is mostly empty space, with positive charges spread evenly across it.
The atom is mostly empty space. No other conclusions could be made.
Answer:
A. the atom is made up of the mostly empty space with tiny, dense, positively-charged nucleus.
Explanation:
How are cells, tissues, organ, and systems related?
Answer: Cells
Explanation:
The body has levels of organization that build on each other. Cells make up tissues, tissues make up organs, and organs make up organ systems. The function of an organ system depends on the integrated activity of its organs.
The ________ is a substage lens that concentrates light on the specimen.
Answer:
microscope's condenser
Explanation:
The microscope's condenser is a substage lens that concentrates light on the specimen.
The condenser of a microscope is a structure that helps concentrate light rays from the light source to illuminate the specimen on the stage of the microscope. It is made up of a system of lens that converges the ray of light and an aperture diaphragm that can be used to control the amount of light that gets to the specimen on the stage of the microscope.
Which of the following constitutes the basic structural organization of life?
A) species living in an environment
B) cells that make up tissues and structures
C) cell organelles that combine to form nuclei D) weather conditions in a habitat
"Cells that make up tissues and structures" is the statement that best describes the basic structural organization of life.
What is the basic structural organization of life?It is the internal organization of living beings that corresponds to cells, tissues, organs and systems.
Characteristics of the basic structural organization of lifeThe cell is the structural and functional unit of life that carries out all the processes that make the constitution of vital transformations possible.According to their functions and needs, the cells group together and form tissues, structures with similar cells that perform the same function, ultimately constituting a complex system that is the organism.Therefore, we can conclude that the cell is the basic, structural and functional unit of living beings; the simplest unit that can exist as an independent living system.
Learn more about the basic structural organization of life here: https://brainly.com/question/2809543
How long have people been debating the idea of evolution?
What was the reason NASA almost crashed a $200 million orbiter into Mars? Group of answer choices A conversion error between two measurement systems A miscalculation on the Mars' graviational pull A launch error The power went out
Answer:
A conversion error between two measurement systems
Explanation:
Which correctly lists three tools that are currently used to collect images during space exploration? A. rover, satellite, space station
B. orbiter, space station, space shuttle
C. satellite, rover, orbiter
D. space shuttle, space station, rover
Answer:
D
Explanation:
Answer
A) rover, satellite, space station
Experiment 1: A scientist is interested in whether increasing the temperature when germinating seeds will decrease the amount of time it takes for germination. Pepper seeds in two equivalent germination rooms will be included in the study. One room is maintained at 85 degrees, the other room is left at the usual temperature of 75 degrees.
- What is the independent variable, dependent variable, and control? *choices are 75 degree room, temperature, and germination rate
Answer:
3
Explanation:
The diagram is a model of the structure of glucose. The structural formula of glucose, C6H1206, shows a ring of 5 carbon atoms and 1 oxygen atom. 4 carbons in the ring are each bonded to an -H and an -OH group in addition to 2 neighboring atoms in the ring. The fifth carbon is bonded to a CH2OH group. What structural feature does glucose share with larger carbohydrates? A. a ratio of 1 carbon atom to 2 hydrogen atoms to 1 oxygen atom B. the presence of double covalent bonds between carbon atoms C. strong bonds between carbon atoms that cannot be broken D. ionic bonds between carbon atoms and oxygen atoms
Answer:
The correct answer is : A. a ratio of 1 carbon atom to 2 hydrogen atoms to 1 oxygen atom
Explanation:
Carbohydrates are the primary and major component of diet, these molecules give vitality to the body, predominantly by means of glucose, a fundamental sugar, which is an part of the starch and a fixing in different staple nourishment diet choices.
the significant chemical formula of carbohydrates is (CH2O)n. It can be exhibited or express by the proportion of the carbon to hydrogen to oxygen which is 1: 2: 1 in the particles of starches. Starches are additionally arranged into three sub-sorts, that is, monosaccharides, disaccharides, and polysaccharides. The monosaccharides are the basic sugars, for instance, glucose.
Thus, the correct answer is : A. a ratio of 1 carbon atom to 2 hydrogen atoms to 1 oxygen atom
The structure below is used in agriculture. What could be a benefit of this
technology?
The answer is c hope this help you
are cows and bulls in the same family? what is the name of the family?
Answer: hey friend! answer is yes, they in the same family called bovidae
Explanation: hope this helps!
Eclispe of the Sun
(b) Based on the diagram shown above, what can be observed on the surface of the globe?
Answer:
ANNULAR SOLAR ECLIPSE
Explanation:
BECAUSE THE SHADOW OF THE MOON DOES NOT EXACTLY REACH THE EARTH,THERE WILL STILL BE SOME LIGHT REMAINING
what is a filament? (plant topic)
Answer:
The stamen of a flower — the part that produces pollen — consists of a slender stalk, called a filament and an anther. The filament supports the anther, which is where pollen develops. The word filament is from the Latin word filum, which means "thread." Filament, in fact, can be a synonym for thread.
Answer:
A filament is the slender threadlike object or fibre, especially one found in animal or plant structures.
a filament can also be defined as the slender part of a stamen that supports the anther.
Explanation:
Why are interactions between organisms important
Which element has fewer than four dots in its electron dot diagrams?
O arsenic (As)
sulfur (S)
krypton (KI)
O gallium (Ga)
Answer:
O gallium (Ga)
Explanation:
Your Welcome;)
The element that has less than four dots in its dot structure is gallium.
What is Lewis structure?The term Lewis structure has to do with the arrangement of outermost electrons in an atom. The Lewis structure consists of the symbol of the element as well as the number of electrons in the outermost shell shown as dots.
Gallium is a member of group 13 hence it has three electrons in its outermost shell. Therefore, gallium has less than four electrons in its dot structure.
Learn more about dot structure: https://brainly.com/question/16357973?
Which of the following statements about eukaryotes is not true?A) They contain organelles like mitochondria, chloroplasts, the endoplasmic reticulum and the nucleus.B) They are usually 10 to 100 microns in diameter.C) They can be either unicellular or multicellular.D) They are also called archaea.E) All of the above are true of eukaryotes.
Answer: Option B, D and E.
They are usually 10 to 100 microns in diameter.
They are also called archaea.
All of the above are true of eukaryotes.
Explanation:
Eukaryotes are organisms that have nucleus and it is surrounded by nuclear envelope and membrane bound organelles in the cell cytoplasm.
They can either be unicellular or multicellular compared to prokaryotes that are Majorly unicellular.
They are not usually 10 to 100 microns because most eukaryotes are multicellular organisms and they are bigger in sizes visible to the eyes like fish, goat,humans.
Eukaryotes are not usually archaea because archaea is are Majorly prokaryotic organisms that are unicellular and have no nucleus.
Plants and fungi were once classified in a single kingdom. Which similarity between plants and fungi led to this classification?
OOOO
their photosynthetic energy acquisition
their nonmotile, fixed body structures
their decomposer role in ecosystems
their predation on bacteria
Answer:
their photosynthetic energy acquisition
Explanation:trust me and thank me later
If a pea plant's alleles for height are tt, what is true of its parents?
A. Both parents were tall.
2 Pts
B. Both parents were short.
C. Both parents contributed a recessive allele.
А E
D. Both parents contributed a dominant allele.
Answer:
C
Explanation:
tt is a recessive allele so it can only be tt if the parents were both tt&tt or Tt&Tt
Answer:
C.
Reason:The plant got it's tt alleles from it's parents, so they would have had to have the recessive alleles to pass it down. This does not necessarily mean that the plants were short, though, as parent plants who both had Tt alleles would have had a chance to have an offspring with tt alleles also.
what is the function of a nerve cell in a multicellular organism
Answer:to help the other cells function
Explanation:
Answer: carry and transmit signals
Explanation:
No system is completely closed off from its surroundings
Which example represents a system that is almost completely closed
A- a wood burning-fireplace
B- A capped thermos
C- An uncapped soda bottle
D- a pot of boiling water
Answer:
B a capped thermos
Explanation:
A scientist observed that penguins move efficently through water.the scientist makes a that if a boat is designed with a propulsion system that moves like a penguin, then the boat will be more efficient than traditional boats
Answer:
i think it is its wont
Explanation:
What is a unique characteristic of stem cells that makes them important
A solution with pH of 7 is ??
Answer:
neutral solution
Explanation:
This pH value of 7 is important because it indicates a neutral solution. All other substances are compared to this neutral point. Any solution that has a pH of less than 7 is considered acidic, and anything above a pH of 7 is basic
why might a newborn baby bleed more from a cut than a baby who is 1 month old.
Answer:
A newborn baby bleed more from a cut than a baby who is 1 month old because they are more delicate and have more of a thin skin compared to a 1 month old.
Hope it helps.
Questions:
1. How is a cell membrane like the plastic bag in the experiment?
2. Define diffusion.
3. List two reasons why molecules will not diffuse into cells.
Explanation:
1. cell membranes are partialy permeable, only allowing passage to some certain molecules.
2. diffusion is the movement of molecules across partially permeable membrane down concentration gradient.
3. the molecules are too big to pass through partially permeable membrane. the concentration of the molecule might be higher in the cell than in the solution/surroundings.
why might the nucleus be referred to as the brain of the cell
Answer:
The nucleus is called the "brain" of the cell because it holds the information needed to conduct most of the cell's functions. Other molecules make proteins from that information on a regular basis - each moment of our lives
Hope this helps!
Suggest one safe way to observe the eclipse of the sun
Answer:
there r eclipse glasses a way to observe eclipse of sun!
hope it helps!
40. When a typical male speaker phonates, his vocal folds open and close
times per second.
Select one:
a. 2
b. 10
c. 125
d. 500
e. 1,000
Answer:
The correct answer is - option C. 125.
Explanation:
Phonates are the ability to produce or articulate the sound especially with the lp of the viba\ration by his or her vocal folds. When an individual vibrates his vocal folds or speaks the sound produces which is known as the phonation.
When a typical male speaker phonates, his vocal folds open and close
125 times per second.
The correct answer is - option C. 125.