Prokaryotes are identified with bacteria: most live as single-cell organisms but some bacteria associate in a chain. Prokaryotes have their DNA in the cytoplasm of the cell. Eukaryotes ("Eu" for true) have a nucleus, a compartment separated from the rest of the cellular content, which contains the DNA.
In both of eucaryotic an procaryotic cell, you can find DNA, all kinds of RNA, Cytoplasm, ribosomes, and a cell membrane,
In procaryotic cell only you can find: a cell wall (located outside the cell membrane), you may find also pili, capsids, plasmids, and flagella.
In a eucaryotic cell only, you can find Nucleus (which contain the DNA), mitochondria, endoplasmic reticulum,
This attracts male wasps and they can pollinate the orchid.
Answer:
C. a population in Florida
Explanation:
Population is described as a group of interbreeding organisms of the same species living together in an area. Here, all the rattlesnakes can breed with each other which makes them a population of rattlesnakes. The report dealt with all the attributes of a population like breeding rate and average size. There are more attributes which can be considered in a population like birth rate, mortality rate etc.
A community is a group of organisms of different species which interact with each other and the surrounding environment. A biome is a collection of ecosystems which reside in a big area with similar environmental factors.
The correct answers are: The lipid bilayer and proteins exist side by side without covalent bonds between them and Some proteins and lipids undergo lateral diffusion along the inner or outer surface of the membrane
According to fluid mosaic model, there is a lipid bilayer that gives fluidity and in which the protein molecules are embedded.
The membrane is mosaic because there is a pattern of different types of molecules that are put together. Molecules are constantly moving in two dimensions.
Components of the cell membrane include:
• Phospholipids – Form a bilayer
• Cholesterol –improves stability and reduce fluidity
• Proteins –integral (transmembrane) or peripheral
• Sugars-usually attached to proteins.
Answer:
4) It allows the exchange of nutrients between the embryo and the mother, while at the same time filtering out harmful material.
Explanation:
The placenta is an organ present in all mammals. She is confirmed between the 6th and 8th week of pregnancy and has as main function the exchange of substances between the mother and the fetus. Among these substances are nutrients, gases and even secretions. The placenta also has the function of fighting infections and promoting immunity to the fetus, in addition, it can act as the lung, the intestine and the liver, while the fetus does not develop its organs.
