Evolution19. What did the different kinds of finches that Darwin sti

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Answer 1

Answer: It showed that species of every kind develop and evolve over time to change and become different.

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What do anaerobic organisms have in common with photosynthetic organisms?A.) They both appeared on Earth at about the same time.
B.) They both can only exist as single-celled organisms.
C.) They both need an energy source in order to survive.
D.) They both produce carbon dioxide as a waste product.

Answers

Ans is option C. They both need an energy source in order to survive.

Energy is an absolute necessity to survive on this earth. All living organisms need energy be it anaerobic or photosynthetic. Photosynthetic organisms can make their own food in the presence of sunlight by photosynthesis and harness energy from it. Anaerobic organisms can also make their own food in the absence of sunlight with the help of inorganic molecules like hydrogen sulfide (H2S), ammonia (NH3), sulphur (S) etc.

Its just that anaerobic organism's way of harnessing energy is different from those of aerobes/photosynthetic organisms but they need energy source for sure.

Fill in the blank. Cells, ______, Organs, Organs Systems.

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cells, tissue, organs, organ systems

Why do phospholipids form a bilayer in water?

Answers

Phospholipids form a bilayer in water because of the shape and amphipathic nature of the lipid molecules

Further explanation

Phospholipids are a class of lipids, it are a major component of all cell membranes. Phospholipids are the shape and amphipathic nature of the lipid molecules that cause them to form bilayers spontaneously in aqueous environments. The most abundant membrane lipids are the phospholipids.

Phospholipids form a bilayer in water because of the shape and amphipathic nature of the lipid molecules. Phospholipids shape are cylindrical and the phospholipid molecules spontaneously form bilayers in aqueous environments. All of the lipid molecules in cell membranes are amphipathic. Amphipatic is the condition where phospholipids have a hydrophilic (water-loving) or polar end and a hydrophobic (water-fearing) or nonpolar end. The structure of the phospholipid molecule consists of two hydrophobic fatty acid "tails" and a hydrophilic "head". Phospholipids arrange themselves into two parallel layers called a phospholipid bilayer. The lipid bilayer or phospholipid bilayer is a thin polar membrane which is made of two layers of lipid molecules. This layer makes up the cell membranes and is critical to the ability of cell's function.

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Answer details

Grade: 9

Subject: biology

Chapter: phospholipids

Keywords: phospholipids

Final answer:

Phospholipids form a bilayer in water due to their amphipathic nature, with hydrophilic heads facing out and hydrophobic tails facing each other. This lipid bilayer acts as a barrier in the plasma membrane, separating materials on either side. Structures such as micelles, liposomes, and lipid-bilayer sheets are formed by phospholipids in water.

Explanation:

Phospholipids form a bilayer in water because of their amphipathic nature. The polar heads of phospholipids are attracted to water molecules, while the nonpolar tails are not. This leads to the arrangement of phospholipids with their hydrophobic tails facing each other and their hydrophilic heads facing out, resulting in the formation of a lipid bilayer.

This bilayer structure is essential for the plasma membrane as it acts as a barrier, separating the water and other materials on one side of the membrane from the water and other materials on the other side.

Examples of structures formed by phospholipids in water are micelles, liposomes, and lipid-bilayer sheets, which are the structural basis for cell membranes and various subcellular components.

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How does natural selection support the theory of evolution?A. Natural selection explains how the changes in life forms that evolve over millions of years take place over shorter periods of time.
B. Natural selection explains how certain life forms are able to survive and reproduce after changes in their environmental conditions.
C. Natural selection comes from the collection of fossil record data that shows how life forms.

Answers

The way natural selection supports the theory of evolution is because it explains how certain life forms are able to survive and reproduce after changes in their environmental conditions.

The answer is B, because natural selection is when some organisms die off due to changes in the environment and inability to adapt.

Based on your readings about Bt corn, express your opinion about whether or not farmers should continue planting Bt corn. Explain why you take this point of view.Identify the arguments made by Prince Charles and Professor Alison Smith on the issue of using genetically modified crops to reduce the problem of world hunger. Express your opinion about whether you agree with Prince Charles or Professor Alison Smith. Explain why you take this point of view.
Express your opinion about the need for more research into the safety of genetically modified organisms. Is this research necessary or not?

Answers

Farmers should discontinue the use of Bt corn (genetically modified maize)as their negative affects on the health of the consumers have not been fully over ruled by the recent research. In my opinion, genetically modified crops, although, are resistant to various pests, should not be encouraged because of the toxic chemical contents used during their production. There's a strong likelihood of these toxic chemicals entering our food chain and also being harmful to other naturally growing plants, hence there's a need for more research before this idea is pursued.

No, because GM maize has caused controversy with respect to possible health effects,
And also, the use of GM o can cause ill , pain, sickness, or even death in some serious cases

Hope this helps

The cell wall of fungi is composed of chitin, the same material found in the exoskeleton of a lobster.a. True
b. False

Answers

This statement is true.

Chitin is a polysaccharide made up of N - acetylglucosamine .

Fungi cell walls are made of chitin. Chitin is also the major ingredient of the exoskeletons of crustaceans and arthropods. Spiders, beetles, butterflies, lobsters, shrimps and crabs all have chitin in their protective armor.

when intermixed with protein and other pigments, it forms different levels of hardness and a variety of distinct colors. Alone, chitin appears translucent and not hard. In arthropods, it is secreted by epidermal cells.

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When blood supplies oxygen and food to a cell surface and these molecules diffuse across, we might expect some "resting time." However, if we inspected most cell membranes in a living human body, we would find a nearly continuous flow of substances back-and-forth across the plasma membrane. Which of the following is not a reason why? a) Cell metabolism is constantly using up oxygen and raw materials; this lowers their concentration so more will diffuse into the cell. b) Cell metabolism is constantly producing waste molecules; this increases their concentration so more will diffuse out of the cell. c) Cells produce useful secretions; this increases their concentration and more will diffuse out of the cell. d) Cell metabolism constantly produces carbon dioxide in respiration; this increases its concentration so more will diffuse out of the cell. e) Cells are living entities and in order to live can never "rest".

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