Circle the letter of the phrase that best completes the sentence.
The cell theory was
a. first identified in 1665
b. the end result of many scientific investigations.
c. described by Rudolf Virchow.
d. Both (a) and (b)

Answers

Answer 1

Answer: D

Explanation: the cell theory took many years to fully learn about and publish and many different scientists, biologists etc had to investigate in order to finalise the hypothesis. Also, it was first identified in 1665 by Robert hooke.


Related Questions

The __________ __________ of the midbrain receive auditory input and trigger the head-turning auditory reflex.

Answers

Answer:inferior colliculi

Explanation:

What percentage of body weight must be lost due to dehydration before delirium, exhaustion, and collapse occur

Answers

Answer:

7-10 percent of body weight must be lost due to dehydration before delirium, exhaustion, and collapse occur.

Explanation:

Hope this helps!

what are thallophytic plants?​

Answers

Answer:

Thallophytes are a polyphyletic group of non-motile organisms traditionally described as "thalloid plants", "relatively simple plants" or "lower plants". They form an abandoned division of kingdom Plantae that include lichens and algae and occasionally bryophytes, bacteria and slime moulds.

Explanation:

gamsahamnida

Answer:

Thallophytic plants are plants of a group of plants or plant organisms (such as algae and fungi) that lack differentiated stems, leaves, and roots.

Explanation:

Hope this helped :>

Explain how hydrogen fuel cells work, and why they provide a healthy, clean way to produce heat and electricity. (Site 1).

Answers

Answer:

As there are no moving parts, fuel cells operate silently and with extremely high reliability. Due to their chemistry, fuel cells are very clean. Fuel cells that use pure hydrogen fuel are completely carbon-free, with their only byproducts being electricity, heat, and water.

Answer:

As there are no moving parts, fuel cells operate silently and with extremely high reliability. Due to their chemistry, fuel cells are very clean. Fuel cells that use pure hydrogen fuel are completely carbon-free, with their only byproducts being electricity, heat, and water.

How can we conserve WATER? describe in short.
Please answer as soon as possible pls I need help please ​

Answers

Explanation:

Turn off the faucet while brushing your teeth.

Only run the washing machine and dishwasher when you have a full load.

Use a low flow shower head and faucet aerators.

Fix leaks.

Install a dual flush or low flow toilet or put a conversion kit on your existing toilet.

Students observed the shape of the Moon with the same amount of time between each observation. They drew this sequence.



Complete each of the 2 activities for this Task.
Activity 1 of 2
How long did it take them to record this sequence?



(Mark the one best answer.)



A.
About 2 days

B.
About 2 weeks

C.
About 2 months

D.
About 2 years

Answers

Answer:

B about 2 weeks

Explanation:

Two weeks is how long it would take to observe five moon phases. Rather that 2 months which would show two full moon cycles.

Which of the following are water problems? Select the three correct answers.

droughts


condensation


pollution


conversation


runoff

floods

Answers

Answer:

floods are the water problem

Floods is a problem

1- List the 3 functions of the Digestive System

2- list the 2 function of the exretory system

3- describe the path of food,beginning in the mouth

4- describe the path of urine formation begginning in the kidneys

5- how does the urinary system maintain homeostasis

Answers

Answer:

1. transportation, digestion, and absorption of food. 

2. Remove and concentrate waste products from body fluids and return other substances to body fluids

3. Food starts to move through your GI tract when you eat. When you swallow, your tongue pushes the food into your throat.

4. Urine then flows through the nephrons, through a system of converging tubules called collecting ducts.

5. filtering out excess fluid and other substances from the bloodstream and secreting waste.

(20 points) {brainliest} PLEASE HELP MEEEE <33333


Which company was given permission by the US Supreme Court to patent genetically modified organisms in 1980?


A. Ford Motor Company

B. General Electric

C. Dow Chemical

D. Genentech

Answers

Answer: B. General Electric

Explanation:

I hope this helps if you still needed the answer.

Answer:

B. General Electric

Explanation:

PENN

Photosynthesis takes place in two separate but dependent series of steps:
First, the light dependent reactions and then the light independent reactions.The light independent reactions (AKA the dark reaction/Calvin cycle) of photosynthesis occurs:

A.Only in the dark in plants

B.In the light and dark in plants

C.Only in the light in plants

D.None of the above

Answers

Answer:

Your answer wold be B: In the light and dark in plants

Explanation:

In the light and dark in plants is the correct answer

The option (B) is correct. In the light and dark in plants.

What do you mean by photosynthesis?

Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that, through cellular respiration, can later be released to fuel the organism's activities.

Moreover, photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that, through cellular respiration, can later be released to fuel the organism's activities.

Hence, the primary function of photosynthesis is to convert solar energy into chemical energy and then store that chemical energy for future use. For the most part, the planet's living systems are powered by this process. It's not particularly efficient by human engineering standards, but it does the job.

Learn more about photosynthesis:

https://brainly.com/question/1388366

#SPJ2

You observe a yellow zone surrounding growth on mannitol salt agar. What does this indicate about the organism

Answers

Answer:

The organism is able to ferment mannitol.

Explanation:

Which of the following does not directly cause erosion?
O Ice
OLichen
ОSun light
oChemicals

Answers

Answer:

a ice

Explanation:

ice doesnt cause erosion directly

It’s either ice or chemicals

What are the two types of force in simple machine?​

Answers

Answer:

there are many..

Explanation:

wheel and axel are two type of forces in simple macine

Explanation:

any two types of force are : contact force & frictional force.

hope this helps you.

True or false?

It takes too much time for oxygen to get into cell and carbon dioxide out if cells are too large.

Answers

Answer:

false....

Explanation:

hopes this helps

Answer:

false

Explanation:

It doesn't take too much time for oxygen to get into cell and carbon dioxide out if cells are too large.

which statement is a feature of both prokaryotic and eukaryotic genes?

Answers

Answer:

DNA‑binding proteins influence the ability of RNA polymerase to initiate transcription of a gene

Explanation:

Why must the number and type of atoms be the same in the products of a chemical reaction as in the reactants?

Answers

Because atoms are rearranged in a chemical reaction, there must be the same number of sodium atoms and chlorine atoms in both the reactants and products.

hope it helps

describe in detail, the pathway of an oxygen molecule as it moves from the air outside your body, into your blood and to cell in a muscle in your arm

Answers

Answer:

The oxygen molecule enters the human body from the mouth or nose and reaches the phraynx and then the larynx, trachea and the bronchus. It then enters the lungs which then the red blood cells takes the oxygen from the blood and carries it to the muscle in the arm.

The pathway of an oxygen molecule from the air outside your body to a muscle cell in your arm involves several sequential steps, including inhalation, gas exchange in the lungs, transportation through the bloodstream, and diffusion into muscle cells.

During inhalation, you breathe in air through your nose or mouth. The air travels through your respiratory system, passing through the trachea (windpipe) and into the bronchi, which branch into smaller tubes called bronchioles. Eventually, the inhaled air reaches the alveoli, tiny air sacs located at the end of the bronchioles in the lungs.

In the alveoli, oxygen molecules diffuse across the thin walls of the air sacs and into the surrounding capillaries. Oxygen diffuses from an area of higher partial pressure (in the alveoli) to an area of lower partial pressure (in the capillaries). Hemoglobin, a protein within red blood cells, binds to the oxygen molecules in the capillaries, forming oxyhemoglobin.

To know more about lungs here

https://brainly.com/question/2619922

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If there is oxygen around, how will muscle cells make ATP?

Answers

Answer:

Muscle cells can continue to produce ATP when oxygen runs low using lactic acid fermentation. ... Many yeast use alcoholic fermentation to produce ethanol

label the diagram below of the root cross section
Plzzzzz help ASAP

Answers

The labeling of the root cell is as follow:

The outer red part is the Epidermis. The inner white part is the Cortex. The innermost pink part is the Xylem.

Parts of a Root Epidermis - protects the tissues. Cortex - allows for transportation of materials. Xylem - allows for transportation of water.

In conclusion, the root is quite complex and has various parts to allow it fulfil its functions in keeping the plant alive.

Find out more about the xylem at https://brainly.com/question/14197052.

Biology questionnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn

Answers

Answer:

3rd one

Explanation:

Answer:

c. firewood

Explanation:

its a chemical reaction

5) Which of these best describe a physical change? A) Waste products are formed. B) Biting into a piece of bread. Simple sugars in the small intestine are broken down into glucose. D) Saliva in the mouth breaks the bread into smaller molecules like maltose.​

Answers

Answer: Biting into a piece of bread

Explanation:

Answer:

B Biting into a peace of bread

Explanation:

I took the test and as well. the first physical thing that changes whenever any type of food goes into your mouth is the way it breaks apart/turns into a smaller part of the food so that your esaphgous can swallow it. Hope this helped :)

Explain how the surface area and volume of a cell are related to molecule transport through the cell membrane.
Think about filling a small room and a large room with people. Which room takes less time to fill?

Answers

Answer:

Explanation:

I really wish to help but if you need help with that question it can be found on the internet

what gives animal cells their shape and structure?

Answers

Answer: Animal cell's shape and structure are determined by the cytoskeleton.

What is the cytoskeleton?

The cytoskeleton is present in all animal cells, prokaryotic (bacterial) cells contain a very rudimentary version of it, while plant cells do not have one at all. It consists of several types of large molecules that provide physical support to the cell as well as internal transport along its length for organelles like endoplasmic reticulum (ER), mitochondria, vacuoles, etc. The three main components are microtubules, intermediate filaments and microfilaments which give rise to different structures within the cell. Microtubules are long cylindrical tubes made up of two protein subunits (alpha and beta tubulin) that form a hollow tube. These are the main components of the cytoskeleton, they provide support to the cell while also having transport capacity for organelles like endoplasmic reticulum (ER), mitochondria, vacuoles, etc. Microtubules are dynamic structures which means their state is constantly changing i.e., growing, shrinking or moving around depending on requirements of the cell.

The most extreme state of __________________ is a life-threatening condition called thyroid storm, in which enormously excessive quantities of thyroid hormones are released into the bloodstream.

Answers

Answer:

thyrotoxicosis

Explanation:

19. Engineer It In some rivers and lakes, dams
are constructed to harvest energy by converting the
kinetic energy of moving water into electrical energy.
Water from behind the dam flows through a turbine
that transforms kinetic energy into mechanical
energy. The turbine turns a generator that converts
mechanical energy into electrical energy.
The water from behind the dam could flow to the
turbine either through an opening near the middle or
top of the dam or by flowing over the top of the dam.
Which type of water flow would be the best design for
sending a consistent flow of water past the turbines?
Explain your reasoning.

Answers

Answer:

A hydroelectric dam converts the potential energy stored in a water reservoir behind a dam to mechanical energy—mechanical energy is also known as kinetic energy. As the water flows down through the dam its kinetic energy is used to turn a turbine.

Explanation:

ANSWER ASAP FOR BRAINLIEST!!!!

Answers

i agree number 2 is the most reasonable

pls help science kills me

Answers

Answer:

false

Explanation:

its the other way round!

Answer:

i am 90% sure its false

Explanation:

proteins for sure helps with strength and elasticity, id k what minerals do.

the earth’s_______and position relative to the________effects the lengths of_________and________.

*not multiple choice*

i need it asap. thanks!

Answers

distance

sun

day

night

The Earth's distance and position relative to the sun effects the lengths of day and night.

PLEASE HELP ME IM TIMED!

Answers

Answer:

protein i believe

Explanation:

cultivation of plant populations of a single species​

Answers

Single species population-dynamic models for annuals with dormant seeds growing seasonal
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