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scZoUnD [109]
3 years ago
5

According to cell theory, what do these four organisms have in common?

Biology
2 answers:
timama [110]3 years ago
8 0
A. they are made of one or more cell
MaRussiya [10]3 years ago
6 0

Answer: A) They are made of one or more cells.

Cell theory was proposed by Schleiden and Schwann in 1839.

There are three basic principles of this theory, which are as follows-

  • All life forms are made up one or more cells.
  • The cell is considered as the basic unit of structure and organization in all living organisms.
  • All cells are obtained from already existing cells

Thus, the correct answer is A) They are made of one or more cells.

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A segment of a DNA molecule has the base sequence ATGAAC. Write a shorthand structure for this segment and for its complementary
Zanzabum

Answer: See attached picture.

Explanation:

DNA or deoxyribonucleic acid is the name for the molecule that contains the genetic information in all living things. This molecule consists of two strands that wind around each other to form a double helix structure.

The basic unit of nucleic acids are called nucleotides, which are organic molecules formed by the covalent bonding of a nucleoside (a pentose which is a type of sugar and a nitrogenous base) and a phosphate group. So each nucleotide is made up of a pentose sugar called deoxyribose, a nitrogenous base which can be adenine (A), thymine (T), cytosine (C) or guanine (G) and a phosphate group.

<u>What distinguishes one polynucleotide from another is the nitrogenous base</u>, and thus the sequence of DNA is specified by naming only the sequence of its bases. The sequential arrangement of these four bases along the chain is what encodes the genetic information, following the following criterion of complementarity: A-T and G-C. So the sequence of these bases along the chain is what encodes the instructions for forming proteins and RNA molecules. In living organisms, DNA occurs as a double strand of nucleotides, in which the two strands are linked together by connections called hydrogen bridges.

The chemical convention of naming the carbon atoms in the pentose nucleotide pentose numerically confers the names 5' end and 3' end ("five prime end" and "three prime end" respectively). The 5'-end designates the end of a DNA strand that coincides with the phosphate group of the fifth carbon of the respective terminal deoxyribose. A phosphate group attached to the 5'-end allows the ligation of two nucleotides; for example, the covalent bonding of the 5'-phosphate group to the 3'-hydroxyl group of another nucleotide, to form a phosphodiester bond.

3 0
2 years ago
What is population density? answers are A. the number of organisms of a species
Harlamova29_29 [7]

Answer: Option C.

Population density is the total number of organisms within a fixed area.

Explanation:

Population density is the total number of organisms per unit area. Population density is calculated by dividing the number of organisms by the unit area either in square kilometers, squaremeters, square miles.

Population density =number of organisms ÷ unit of land area.

5 0
2 years ago
In which of the following groups of organisms, food material is broken down outside the body and
dimaraw [331]

Answer:

b.yeast,mushroom,bread mould

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3 years ago
Which of the following would be the LEAST likely to be associated with the development of motion sickness? driving rapidly over
Setler79 [48]

Answer: Having a non-functional vestibular apparatus.

Explanation:

Motion sickness is a feeling of sickness that is caused by the movement. It occurs in a vehicle like boat, car, train or bus. It can also occur in the amusement rides. This is not life-threatening. It can make the ride or traveling unpleasant. Motion sickness happens when the brain receives the disturbing message related to the motion and the body's position. These messages are delivered from the ear, eyes, skin receptor, muscles and the joints sensors.

Among the options given, Having a non-functional vestibular apparatus. is not the associated with the development of motion sickness. The vestibular apparatus is associated with ear if the ear sensory system becomes non-functional then it will reduce the sensing of motion sickness.

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With the valve between the collecting duct and the urinary bladder closed and with the pressure increased, _______.
UkoKoshka [18]
Ureters is the correct answer :)
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