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Sedbober [7]
3 years ago
6

The scientist who proposed the idea of continental drift was _____. Albert Einstein Carl Hubbell James Watson Alfred Wegener

Biology
2 answers:
Ulleksa [173]3 years ago
6 0
Set forth in 1912 by Alfred Wegener.

S_A_V [24]3 years ago
3 0

Answer:

It was Alfred Wegener who proposed the idea of continental drift theory.

Explanation:

Biogeographical map of the world is that in which the six major biogeographic realms are present. Geologists believe that many million years ago, all the continents we demarcate today, were in the form of a single land mass called pangea. On account of geological changes, especially movements of crustal plates below the surface of the earth, huge land masses broke off and drifted apart from one another. As these land masses (continents) moved away, the seas separated them and acted as barriers to the free movement of organisms among the continents. Over centuries, plants and animals evolved independently in each biogeographical region.

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Arrange the events taking place during transcription in order: i) The pre-RNA undergoes processing ii) RNA polymerase moves down
Anastasy [175]

Answer:

RNA polymerase binds to the promoter

Polymerase initiates RNA synthesis at the start point on the template strand

RNA polymerase moves downstream unwinding the DNA

RNA transcript is released and polymerase detaches from the DNA

The pre-RNA undergoes processing

Explanation:

The promoter is the specific DNA sequence that serves as a binding site for RNA polymerase. The enzyme RNA polymerase recognizes the promoter sequence and binds to it to begin the process of RNA synthesis. The process of RNA synthesis begins at the start site where the process of the unwinding of DNA duplex is initiated.

The unwinding separates the two DNA strands at the start site where RNA polymerase begins the process of synthesis of the new RNA strand. The newly formed RNA strand and RNA polymerase are released from the template strand after the termination of the process.

In eukaryotes, the primary RNA transcript undergoes the process of splicing of introns, the addition of poly-A tails and 5' cap which in turn transform it into the mature mRNA.

8 0
3 years ago
PLZ HELP! WILL GIVE BRAINLIEST!
dusya [7]

Answer:

1) Oxygen, sugar, water and carbon dioxide are the main starting material and products of both photosynthesis and cellular respiration.

2) The diagram shows that cellular respiration which requires oxygen and sugar is the opposite of photosynthesis which requires water and carbon dioxide. The products of cellular respiration are the starting materials or photosynthesis and the products of photosynthesis are the starting materials for cellular respiration.

6 0
3 years ago
1. How are Lipids and Fatty Acids similar? How are they different?<br><br> Use evidence
Eduardwww [97]

Explanation:

Similar: Fatty acids are generally long chains of hydrocarbons with a carboxylic acid group at one of the ends. While Lipids are polymers of fatty acids with a nonpolar hydrocarbon chain and a small polar oxygen group.

Different: Fats are actually a type of lipid. Lipids are a major class of biochemical compounds that includes oils as well as fats. Organisms use lipids to store energy and for many other uses. Lipid molecules consist mainly of repeating units called fatty acids.

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Suppose that your friend is moving far away and describing his new location. He mentioned that Derreck gets a lot of precipitati
svet-max [94.6K]
<span>d. Tropical dry forest

</span>A biome is composed of various diverging ecosystems that relates with the community. Biomes can either be deserts, grassland, savanna, tropical rain forest, taiga, boreal and etc. <span>An ecosystem involves both the biological (plants, animals, human beings) and non-biological (land, water, soil, and atmosphere) community which interacts as a system. </span>
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3 years ago
Saccharomyces cerevisiae is a diploid yeast species that can reproduce either sexually or asexually. An experiment was performed
Savatey [412]

Answer:

D. The first division will reduce the number of chromosomes by half for each daughter cell, and the second division will move single chromatids to each daughter cell.

Explanation:

Gametes are formed by meiosis in diploid gamete mother cells. During gamete formation, the gamete mother cell in the yeast would undergo meiosis I. During first division (meiosis-I), the process of crossing over during prophase-I creates genetic variations and movement of homologous chromosomes to the opposite poles during anaphase-I reduces the chromosome number to half in each daughter cell.

Two daughter cells are formed by the end of meiosis-I each of which enters meiosis-II. Splitting of centromere and separation of sister chromatids during anaphase-II of meiosis-II results in the movement of single chromatids to the opposite poles of the cells.

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