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.
Explain why contractile vacuoles would be of little value to one-celled organisms living in the ocean (salt water)
The organisms living in an aquatic environment have to undergo osmoregulation and survive in a hypotonic environment. The organisms such as paramecium, protists, and unicellular algae have contractile vacuoles.
The functions of the contractile vacuoles include:
1. Contractile vacuoles help in the osmoregulation, such that the movement of solute particles inside and outside of the cells.
2. The contractile vacuoles are also required to remove excess water from the organisms.
3. The vacuoles contract to discharge the fluid for the survival of organisms like paramecium and algae.
Thus, the contractile vacuoles contract to allow the organisms to survive in a hypotonic environment.
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3. How does a tongue help in the process of digestion?
Answer:
the tongue helps in the process of digestion by facilitation the movement of food while chewing and assisting the process of swallowing
Explanation:
the method of passing microorganisms by touching is called:
Answer:
it is called communicable
The input of sewage, fertilizer runoff, and animal waste can cause the formation of Choose one: A. an algal bloom. B. nutrient-poor soil C. fertile farmland. D. an artesian well.
Answer:
An algal bloom.
Explanation:
The input of sewage, fertilizer runoff, and animal waste can cause the formation of an algal bloom (abundances of cyanobacteria) because of the excess nutrients (nitrogen or phosphorus). If there are too much nutrients in the water (caused by the sewage, fertilizer runoff, and animal waste) it creates a perfect environment for excess growth, being an algal bloom. Algal blooms are toxic and are known to be harmful to the animals that rely on this source for their survival and humans as well.
to improve cardiorespiratory endurance the frequency of the workout sessions should be
Answer:
cardiorespiratory endurance?In summary, to improve cardiovascular fitness, a regular aerobic exercise program, repeated 3–5 times per week for 20–60 minutes and at an intensity of 142–186 BPM
Explanation:
Explain how a wholemeal sandwich with tuna and tomatoes will be broken down by the digestive system. Start the process from the mouth and end at the anus.
Answer:
All of our energy and nutrition come by way of the gastrointestinal (GI) tract. It is an amazing machine well designed for digesting and absorbing nutrients and for shielding the rest of the body from microorganisms, viruses and other foreign matter. The GI tract spans from the mouth to the anus, with each separate organ having a role in digestion, absorption or excretion.Lastly, if you would like to learn more about yourself and how you can best reach your own nutritional and fitness goals, we encourage you to take a look at the following home health testing guides and resources:
Food Sensitivity Testing Guide
DNA Health Testing Guide
Guide to Life Extension Products
Home Health Testing Guide
Everlywell Home Tests Guide
Home Testing for Heavy Metals
Explanation:
(: tsorry hope to help
as of may 2020, carbon dioxide levels have reached 417 parts per million. what level should they be at to have the world in a climate similar to that in which civilization first developed?
Given what we know about global carbon levels in the present and the past, we can confirm that in order to be at the level of early civilizations, the modern-day carbon level should be at 280 parts per million.
Global atmospheric carbon levels are measured in parts per million. What this means is that for every one million units of mass in the atmosphere, 280 of them were carbon. This means that in recent years, the global carbon levels in the atmosphere have doubled.
The primary cause of these increased carbon levels is industrial pollution. Chemicals are released into the atmosphere as a by-product of industrial processess. This began with a noticeable spike during the industrial revolution and has then increased without end.
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Which statement is supported by the atomic theory? A. Atoms combine to make all the substances on earth
Answer:
this is not true.
B) atoms of all substances are identical in all respects..
Dalton's theory said - all atoms of one substance are identical. Atoms of different elements differ.
Explanation:
can someone please help me!! ASAP!!
Thank uuu!!!
ANSWER
A
Explanation:
no explanation
When exponential growth is graphed, the trend line created looks like what letter of the alphabet?
help please
Answer:
letter J
Explanation:
The line creates a shape like the letter J and is sometimes called a J-curve. The symbols in this equation represent concepts. Here's how to translate the equation into words: The change (d) in number of individuals (N) over a change (d) in time (t) equals the rate of increase (r) in number of individuals (N).
The force the Earth exerts on the sun is equal in magnitude to the
force the sun exerts on the Earth.
O True
o False
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The given statement is true, because according to Newton's third law of motion ~ " Every action has an equal and opposite reaction " .
What are the most important benefits trees and fruit-bearing trees?
Answer:
Trees give off oxygen that we need to breathe. Trees reduce the amount of storm water runoff, which reduces erosion and pollution in our waterways and may reduce the effects of flooding. Many species of wildlife depend on trees for habitat. Trees provide food, protection, and homes for many birds and mammals.
Explanation:
Which of the following is a natural event that is part of the long-term carbon cycle? (1 point)
A. Earthquakes
B.Tsunamis
C.Blizzards
D. Volcanic eruptions
Answer:
Which of the following is a natural event that is part of the long-term carbon cycle?
A. EarthquakesWhat are Spore-bearing structures in fungi called what?
Answer:
Fruting bodies
Explanation:
Fungi can produce spores on somatic hyphae or on special spore producing hyphae which are arranged into structers called fruting bodies.
HELP PLEASE! TY
A. How are radio waves used to create radar maps?
B. How does reflectivity help meteorologists figure out the weather shown on
radar maps?
Answer:
A. These signals have been calibrated against actual visual and location readings for the amount of rain falling and cloud water content. ... Thus the computer generates a visual image according to the reflectivity of the amount of water in colors on a map.
B. Reflectivity of an object helps indicate the amount of water that a cloud may carry. The stronger the reflected signal from the radar signal sent out, the easier the meteorologist will be able to tell what to expect. ... This in turn is interpreted by the meteorologist from past experience as what to expect in the future.
Food travels from the mouth to the stomach via the __________. A. Gallbladder B. Liver C. Intestines D. Esophagus Please select the best answer from the choices provided. A B C D.
Answer:
Esophagus
Explanation:
The esophagus is a muscular tube extending from the pharynx and behind the trachea to the stomach. Food is pushed through the esophagus and into the stomach by means of a series of contractions called peristalsis.
Answer:
The answer is D. Esophagus
Glands that have branched ducts and secretory cells that form sacs at one end of the ducts are classified as ___________ glands.
Glands that have branched ducts and secretory cells that form sacs at one end of the ducts are called compound alveolar glands.
What is an exocrine gland?The exocrine gland secretes enzymes outside the gland through the duct. The gland can be unicellular, multicellular, compound, tubular, alveolar, etc. Their modes of functions vary too. An example of an alveolar gland is the mammary gland. Sweet glands are an example of tubular glands.
Hence, glands having branched ducts and sac-like secretory cells are called compound alveolar glands.
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Joanna was chewing gum and talking to her friend when suddenly she swallowed her gum. Which phase of swallowing was most likely involved in the accidental swallowing of her gum
The phase of swallowing that was most likely involved in the accidental swallowing of her gum is the pharyngeal phase.
There are different phases of swallowing is divided into three, namely:
oral phasepharyngeal phase andesophageal phaseThe oral phase is voluntary while the pharyngeal and the esophageal phase is involuntary.
The pharyngeal phase involves the movement of the bolus of food from the oropharynx into the esophagus.
Since the Joanna accidentally swallowed her gum, it is an involuntary action of the pharyngeal phase of swallowing.
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Arolium uses in a cockroach.pleasehelpme.
Answer:
just run away ........ ok save yourself
If there is oxygen around, how will yeast cells make ATP?
ummm mom mm mmmmmmmmmmmmmm
Javier is going to construct a physical model of Earth. What is the correct order, from inside to outside, of earths layer?
A. Crust,mantle,outer core, inner core
D. Lithosphere, asthenosphere, mesosphere, outer core, and inner core
( those are the two choices I ended up with and don’t know which one it is)
Answer:
Its c
Explanation:
its defo c
If an organism's DNA contains 30% adenine nucleotides, what percentage of its DNA is composed of thymine nucleotides
what hormone directly opposes the actions of natriuretic hormones?
The hormone that directly opposes the actions of natriuretic hormones is aldosterone.
Aldosterone is a hormone produced by the adrenal glands, specifically the adrenal cortex. It acts on the kidneys to promote the reabsorption of sodium ions and the excretion of potassium ions.
Natriuretic hormones, on the other hand, promote the excretion of sodium ions and the reabsorption of potassium ions in the kidneys, leading to increased urine production and decreased blood volume.
Therefore, aldosterone counteracts the effects of natriuretic hormones by increasing sodium reabsorption and reducing potassium excretion, which helps to retain water and maintain blood pressure.
In summary, while natriuretic hormones promote sodium excretion and water loss, aldosterone works in the opposite direction by promoting sodium reabsorption and water retention.
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Question 2 (Multiple Choice Worth 2 points)
(01.02 MC)
Sucrose and lactose are two carbohydrates that have the same molecular formula (C12H22011). Which of the following
O They are made up of differentlmino acids.
O They are monosaccharides with different atoms bonded to their rings.
O They each have two glucose molecules, but the arrangement differs.
O They are made of different combinations of monosaccharides.
Question 3(Multiple Choice Worth 2 points)
Answer:
Last one is correct
Explanation:
Sucrose is made of glucose and fructose
Lactose is made of glucose and galactose
Which of the following is the female gamete?
Answer:
a. Ovum is correct
Explanation:
The movement of water across cellular membranes through aquaporins is known as?(1 point)
endocytosis
active transport
simple diffusion
osmosis
Answer:
- osmosis -
Explanation:
The quick trick is that osmosis can only occur in water or insolvent movements!
Think of fish, fish have a lot to do with osmosis because the water will go through the fish's skin/gills which will help them breathe and thrive.
!! hope that helps love you guys !!
The movement of water across cellular membranes through aquaporins is known as osmosis. Water moves down the concentration gradient. The fourth option is the correct answer.
How do molecules move across the cell membrane?Molecules can pass the cell membrane both actively and passively. In passive transport, no energy or ATP is required. Molecules can move from a higher concentration to a lower concentration.
Diffusion and osmosis are examples of passive transports. In diffusion, gases and other small molecules pass the cell membrane from a higher to a lower concentration. Water is a polar molecule, so it doesn't pass the membrane due to its nonpolar nature. Cells have aquaporin channels that are made for water.
Through aquaporins, water passes into the cell. This is called osmosis. In active transport, energy is required. When a molecule passes from a lower concentration to a higher concentration, energy is needed. An example is sodium-potassium ATPase.
Hence, the correct answer is osmosis. The fourth option is the correct answer.
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what is prophase, meta phase and anaphase labled under?
1.Mitosis
2.DNA replication
3.Meiosis
4:Photosynthesis
Answer:
Technically Mitosis and Meiosis
Explanation:
Mitosis is the spliting of Body Cells. Mitosis goes through 4 phases that are easy to remember as PMAT. Mitosis starts with Interphase then moves to Prophase, Metaphase, Anaphase, and Telephase. These steps also occur in Meiosis. However Meiosis goes through these step twice. If you need further explaination of mitosis and meiosis I recomend the amoeba sisters.
Hope this helps!!
the organ of smell and taste are closely related discuss?
Answer:
They are closely related because the bose and mouth are connexted through the same airway. You taste and smell at the same time.
explain how a molecule of carbon dioxide from the atmosphere teaches the site of photosynthesis in a leaf
Answer: On the surface of the leaves of the plants there are a large number of tiny pores known as stomata or stoma. For photosynthesis green plants take carbon dioxide from the air. The carbon dioxide enters the leaves of the plant through the stomata present on their surface. Each stomatal pore is surrounded by a pair of guard cells.
Explanation:
if the carrying capacity for the north atlantic cod on the grand banks of newfoundland is 500,000 tons, when do you expect that the rate of population growth would be greatest?
If the carrying capacity for the North Atlantic cod on the newfound land is 500,000 tons, then we would expect that when there are 250,000 tons of cod on the grand banks, the population growth will be greatest.
The carrying capacity speaks volumes about the maximum amount of a species population that the ecosystem can sustain permanently provided there is the availability of water, food, habitat, and other life essentials.
In terms of population ecology, it is defined as the maximum burden that the environment can tolerate.
In population ecology, populations normally decrease above the carrying capacity while they increase below the carrying capacity. A decline in population size above the carrying capacity can be caused by a variety of factors, such as a lack of sunshine, space, or food availability.
Therefore, we can conclude that If the carrying capacity for the North Atlantic cod on the newfound land is 500,000 tons, the rate of population increase will be maximum and greatest when there are 250,000 tons of cod on the Grand Banks.
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