Answer:
Ptolemy
Explanation:
Ptolemy is the earliest earliest astronomer and mathematician in the list who lived and worked in the second century AD. Nothing is known about his personal life but his scientific work is well known.
He made his observations using naked eyes. In his opinion, the Universe is ''a set of nested, transparent spheres, with Earth in the center.''(Khan Academy). His argument was that the Moon, Mercury, Venus, and the Sun were all revolving around around Earth.
Although Ptolemy made significant contributions in Astronomy but he was wrong in positing that the earth did not move at all. This is inconsistent with our present day knowledge about the celestial bodies. Also, his work missed out other planets that were yet to be discovered then such as Uranus, Neptune, Pluto etc.
Which of the following describes a response controlled by the endocrine system?
A. Dodging a moving car
B. Release of melatonin to regulate sleep cycle
C. Pulling your hand off a hot stove
Answer:
B. Release of melatonin to regulate sleep cycle
Explanation:
Scientists studying the Delta water notice that levels of both chlorophyll and sediment in the water rise and fall on a regular cycle. Which of these hypotheses are consistent with their data? Select all that apply.
A.
Phytoplankton populations increase during warmer, summer months.
B.
Phytoplankton populations decrease as chlorophyll in the water increases.
C.
Sediment deposition in the Delta increases when snow melts during the summer.
D.
Phytoplankton populations increase after sediment is washed into the Delta.
E.
Sediment flow is impeded by the growth of plants and animals in the water.
Answer:
i think B can you help me plz
Explanation:
In water chlorophyll and sediment rise and fall when chlorophyll level and light increase it will increase the phytoplankton population when sediment is washed into the delta, hence option b is correct.
What is phytoplankton?Phytoplankton, which includes single-celled algae and other creatures that resemble plants, makes up the base of the ocean's food chain.
Chlorophyll and other light-harvesting pigments are used by phytoplankton, just like plants on land, to perform photosynthesis, absorbing atmospheric carbon dioxide to create sugars for fuel.
The stratification, or layering, intensifies with increasing surface water temperature and further inhibits mixing. As a result, phytoplankton productivity and nutrient transport from deeper water to surface waters both decrease.
Therefore phytoplankton population is affected by the chlorophyll and sediments to increase photosynthesis, hence option b is correct.
Learn more about phytoplankton, here:
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list 4 methods that can be used to separate mixtures
Answer:
filtration,separating funnel, sublimation, distillation, paper chromogtraphy
Explanation:
their are the 4 methods of separating mixtures
Describe how you could use the emulsion test to show the presence of oil in a sample of fish
Answer:
Explanation:
Yeah don’t sndndkond d. Deneb
Which characteristic do vertebrates have that invertebrates lack?
A. Bilateral symmetry
B. Backbone
C. Radial symmetry
D. Exoskeleton
Answer:
B. Backbone
I hope this helps!
Answer:
Backbone
Explanation: vertebrate means "having a backbone". Invertebrate means the opposite.
what is a tissue? .
Answer:
a soft paper to blow your nose
Explanation:
GIVING BRAINLY, FOLLOW AND STARS
what type of structure is a tree trunk
A. frame
B. combination
C. shell
D. mass
Answer:
b or d
Explanation:
using light intensity, carbon dioxide levels, temperature, and wavelength of light. what is the most ideal conditions for photosynthesis? and what factors limit affect oxygen production?
Answer:
1) light intensity and carbon dioxide. 2) temperature.
Explanation:
reason is that when photosynthesis is taking place carbon dioxide and light intensity is needed to make their own food. and due to high temperature
A person develops an elevated body temperature from a bacterial infection the fever is response from the body to help
Answer:
it helps to heal and maintain
Explanation:
4. In carnations, red and white flowers make pink flowers. What complex inheritance pattern is this? Also, create a Punnett square for a cross between a red flower and a pink flower. Then list the phenotypic and genotypic ratios of the offspring.
Answer: The correct answer is incomplete dominance.
Cell membrane part 2
Please help will give brainlist
The lining of the small intestine produces lactase. Lactase breaks down large polymers in lactoseto monomers for absorption through the lining of the intestine. Those people who do not produce lactase -
O Make lactose instead of breaking it down
O Convert lactose into toxic chemicals
O Break down lactase more quickly
O Are not capable of breaking down lactose
Answer:
O Break down lactase more quickly
Explanation:
Answer:
O Break down lactase more quickly
Explanation:
Which statement best explains why an object appears green in sunlight?
The object absorbs most white light and refracts most green light.
The object refracts most white light and absorbs most green light.
The more green light is absorbed while more red and blue light are reflected.
More green light is reflected while more red and blue light is absorbed
Answer:
More green light is reflected while more red and blue light is absorbed. is D
Explanation:
An object appears green in sunlight because it reflects more green light and absorbs more red and blue light. So the correct option is D.
Why do we see colours?The overall perception of colours depends on the length of the energy wavelengths. Red colour has the longest energy wavelength and violet colour has the shortest energy wavelength.
When sunlight hits an object, a material will absorb a specific wavelength. Sunlight is a combination of all wavelengths. The wavelengths that are not absorbed by an object are reflected.
The reflected light reaches our eyes and is perceived. Thus, the colour that we associate with an object depends on what wavelength is reflected.
When the sunlight reaches our eyes, the rods and cones of the retina are stimulated. This stimulation signals the brain of our colour perception. The rods and cones have specific colours and lighting by which they are activated.
Therefore, an object will appear green because it absorbed red and blue light and reflects green light. The correct option is D.
Read more about colour perception, here
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I NEED HELLLLLLP!!
which horse is the common ancestor to all horse species
Answer:
Umm its a horse
Explanation:
How does the carbon atom travel though a plant cell. explain by steps.
15 pts
Answer:
Carbon molecules are then rearranged and moved to the electron transport train. the electron transport train is a transport for electrons and molecules throughout the membrane of a cell. Many useable ATP are made here. The Carbon Atom is involved throughout this process and repeats this process multiple times.
Explanation:
I hoped this helped! <3
All things nature gives are called ____ a. pantries b. ores c. natural resources d. renewable resources
What type of molecule contains the most energy?
Answer:
Lipids
If i were to guess, without any answer choices, I would say that we get out energy from carbohydrates, and we store energy in lipids, so Lipids (being long chains) might have the most energy.
Explanation:
Please tell me if this is wrong, I did not have much to work with without any answer choices, and this was very broad. :)
Where does Cellular Respiration occur within a cell?
Nucleus
Mitochondria
Ribosomes
Cytoplasm
Answer:
answer is Mitochondria
Answer:
Mitochondria
Explanation:
Im taking bio this year hope this helps
Place the four images from the cell cycle in the correct chronological order.
A, D, B, C
C, D, B, A
C, B, A, D
B, C, D, A
Answer:
C, B, A, D
Explanation:
The images in this question is portraying the stages involved in MITOSIS, which is a kind of cell division that forms two genetically identical daughter cells. The four stages of mitosis represented in the image are as follows: interphase, prophase, metaphase, and anaphase
- INTERPHASE: This stage is regarded as the resting stage of the cell. The chromosomes are found to be supercooled together as chromatins as seen in image C.
- PROPHASE: In the prophase stage, the chromosomes become condensed and more visible as seen in image B.
- METAPHASE: In the metaphase stage, the chromosomes align at the equator of the cell in order to be pulled apart by microtubules as seen in image A.
- ANAPHASE: In the Anaphase stage, the chromosomes are pulled apart into opposite poles of the cell as depicted in image D.
The images of the cell cycle in the correct chronological order would be C, B, A, D.
The order of the cell cycle is from the interphase to the m phase.
The interphase order is:
G1 phase - cell growth and developmentS phase - DNA synthesisG2 - protein synthesisThe m phase order is:
Prophase - nuclear envelope dissolves, chromatin condensesMetaphase - chromosomes align at the equatorAnaphase - sister chromatids are pulled apart and migrate to opposite polesTelophase -migration of sister chromatids completeIn the image:
A - metaphaseB - S phase C - G1 phaseD - telophaseHence, the order would be C, B, A, and D.
More on the cell cycle can be found here: https://brainly.com/question/25282664?referrer=searchResults
2. Which blood cell is part of the immune system? A red blood cell B platelet C white blood cell
Answer:
red blood cells
Explanation:
Answer:
Blood cells formed in the bone marrow start out as stem cells. A stem cell (or hematopoietic stem cell) is the first phase of all blood cells. As the stem cell matures, several distinct cells evolve. These include red blood cells, white blood cells, and platelets.
Explanation:
8. Which of the following are functions of external regulators of the cell cycle?
Select two answers.
a. regulate checkpoints
b. make sure chromosomes have replicated
c. speed up or slow down the cell cycle
d. stop the cell cycle
Speed up or slow down the cell cycle are functions of external regulators of the cell cycle.
The regulation of cell proliferation, growth and DNA synthesis are controlled by the regulatory machinery of the cell cycle.
Cell cycle progression is activated directly by a series of heterodimers formed by cyclins and cyclin-dependent kinases (CDKs).
Cyclin D, by forming a complex with the cyclin-dependent kinases CDK4, activates the action of the kinase whose main substrate is the Rb protein. Cyclin D are proteins that respond to external signals in cells and execute responses such as acceleration of the cell cycle.Cyclin D1 is a protein encoded by the CCND1 gene this acts on the cell cycle by accelerating the G1 phase.In the hypophosphorylated state, the Rb tumor suppressor protein is active and performs its function by inhibiting cell cycle progression.Therefore, we can conclude that speed up or slow down the cell cycle are functions of external regulators of the cell cycle.
Learn more here: https://brainly.com/question/22558385
How do adaptations affect organisms such as orchid plants
Answer:
Orchids are very well-adapted to life in the canopy. They have roots with a large surface area for rapid absorption of nutrients and water. Their secondary stems can hold stores of water so the plant can withstand periods of drying. ... Orchids also utilize insects to spread their pollen.
PLEASE ANSWER ASAP!!! PLEASE WILL GIVE BRAINLIEST IF RIGHT
Animals breathe in oxygen and breathe out carbon dioxide. Where does the carbon dioxide come from?
it is produced during photosynthesis
It is a product of cellular respiration
It is needed to create energy for cells
it is created when plants are consumed.
Answer:
It is a product of cellular respritation
Answer:
Explanation:
It is a Product Of cellular Respiration
Deep ocean technology has discovered organisms in hydrothermal vents that do not rely on sunlight to survive.what do these organisms use as there energy source ? A-chemosynthesis B-hydropower C-thermal heat D-electrical
w
hollowing statements
false
Tue
false
Dre offrog TO
to completed with in 12 weeks
Answer:
i think this question is incomplete
Scientists are creating a new variety of corn. They have two requirements: the new corn must resist pests and it must contain vitamins. What method will they most likely use to create this corn?
a. insert a gene from one cell into another
b. insert a gene from one organism into another
c. remove cell walls of plant cells in culture
d. remove a gene from a plant cell
Answer:
i think the answer is b.
Answer:
insert a gene from one organism into another
Explanation:
they must transfer a gene that is able to fight against pests, while also containing vitamins, to do this they'd need to transfer a gene with these traits from one organism into another
Plz answer You will get 26 points!
Which correctly lists the three processes that are affected by freeze and thaw cycles?
creep, landslide, and deposition
deposition, creep, and weathering
landslide, slump, and deposition
slump, weathering, and creep
Answer: B
Explanation:
Answer:
d
Explanation:
At a divergent boundary of TWO OCEANIC plates, what landform is
made?
O trench
valley
O mountain
O earthquake
O volcano
Answer:
Trench and mountain
Explanation:
In the image below, which region is showing an abnormally high sea level? Color-coded map showing the height of the world's ocean surfaces at a particular time. Purple areas correspond to approximately 10 centimeters below normal. Light blue areas correspond to approximately 2 centimeters below normal. Green areas correspond to approximately 3 centimeters above normal. Red areas correspond to approximately 10 centimeters above normal. In this map, area A is colored green, area B is colored red, area C is colored purple, and area D is colored light blue. Public Domain A B C D
Answer:
can you import the image
Answer:
b
Explanation:
5. Blood cells, which are part of the circulatory system, or created by marrow. This demonstrates that the circulatory system interacts with which of the following systems?
A respiratory B skeletal C excretory D integumentary
Answer:
B
Explanation:
Answer:
B, skeletal
Explanation:
hope this helped! I took it on edge and i think i got it right
