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Sophie [7]
3 years ago
12

What goes on at the center of earth?

Biology
2 answers:
Natasha_Volkova [10]3 years ago
7 0
Lava is at the center of the earth witth lava 
Kipish [7]3 years ago
4 0
Lava is in the middle of the core of the earth . Sometimes the lava explodes or erupts and then that it what causes a earthquake sometimes
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If a circle has a diameter of 16 feet, which expression gives its area in square
bagirrra123 [75]

Answer:

The options are unclear but the answer is 8^2π square feet or 64π sqfeet

Explanation:

Area of a circle is denoted by: πr^2 where r is the radius of the circle.

In this question, the diameter was given. The diameter of a circle is twice the radius. Therefore, in order to get the radius, we divide the diameter by 2 i.e. r = d/2

= 16/2 = 8 feet.

Thus, the radius = 8 feet.

Hence, Area of a circle = πr^2

= π × 8^2

= 64π or 8^2π sqfeet.

6 0
3 years ago
Wild diploid wheat has seven chromosomes in its pollen. Discuss the major events that had to occur for tetraploid pasta wheat to
lianna [129]

Answer:

Tetraploid wheat evolved by allopolyploidization and subsequent diploid-like behavior due to cytological diploidization

Explanation:

Durum wheat (<em>Triticum durum</em>) or pasta wheat, is a tetraploid wheat species that has 28 chromosomes, i.e., seven pairs in each genome (2n = 4x = 28). Durum wheat was domesticated from wild emmer wheat, which originated by hybridization of two diploid wheat species with 14 chromosomes: <em>Triticum monococcum</em> (genome AA) and one wild progenitor (genome BB). <em>Triticum durum </em>is a typical example of evolution by hybridization and polyploidization, where the resultant tetraploid species has two complete sets of chromosomes. Allopolyploidization is one of the most common types of plant speciation. During meiosis, 28 chromosomes form 14 homologous chromosome pairs, because homologous chromosomes have developed 'restriction of pairing' (i.e., cytological diploidization). The restriction of pairing to fully homologous chromosomes ensures a correct meiotic behavior, which otherwise would be altered due to the high level of homology that still exists among chromosomes from different wheat progenitors.

5 0
3 years ago
Which statement is not true about prokaryotic cells? They are always single-celled organisms, and they never contain mitochondri
IRINA_888 [86]

Answer:

They lack a nucleus, but they do have ribosomes.

Explanation:

Prokaryotes are unicellular organisms that lack organelles or other internal membrane-bound structures. Therefore, they do not have a nucleus, but, instead, generally have a single chromosome: a piece of circular, double-stranded DNA located in an area of the cell called the nucleoid.

6 0
3 years ago
Read 2 more answers
Which of the following is true about the speed of light?
Arte-miy333 [17]

Answer:

<em>It is a constant when the light is traveling in a vacuum.</em>

Explanation:

7 0
3 years ago
Do you know any clever ways to repurpose leftover banana peels?
baherus [9]
Blend the banana peels with coffe grounds and egg shells to make a homemade fertilizer!
5 0
2 years ago
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