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dedylja [7]
3 years ago
7

How many neutrons does element X have if its atomic number is 36 and its mass number is 91?

Biology
1 answer:
Viefleur [7K]3 years ago
5 0
55 is the answer
!!!!!!!!!!!!!!!!!!!!!!!!!!
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Hoe do compounds differ from elements
pogonyaev
Compounds are made up of elements.

Elements are the ones we pull straight out from the periodic table.

For example:
H2O, HCl, NaCl, NaOH --> these are all compounds

H, N, B, Ne, Na, Cl, O, K --> these are all elements.
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3 years ago
Which rocks cool the slowest.
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Dioride, gabbro, granite - they're intrusice ingeour rocks.
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3 years ago
Geologic time helps explain...
kap26 [50]

Answer:the answer should be Different locations of extinct organisms on earth

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4 0
2 years ago
Use the mechanisms of meiosis to explain why most mules are sterile.
Tema [17]

Answer:

3. An even number of chromosomes are required for synapsis during prophase I and proper pairing during metaphase

Explanation:

Mules are hybrids of a cross between a female horse and a male donkey. Horses contain 64 chromosomes while donkeys contain 63 chromosomes in their somatic cells respectively. This means that they each produce 32 and 31 chromosomes respectively during meiosis. A mule, hence, contains 32+31= 63 chromosomes in their somatic cells.

This chromosome number in mules are uneven for meiosis to occur because meiotic division requires that an even number of homologous chromosomes pair together in a process called SYNAPSIS during prophase I of meiosis I. This is impossible in a mule because of the uneven number of chromosomes in its cells.

Also, during metaphase of meiosis, the homologous chromosomes need to be properly aligned at the equator for separation to occur. This is also impossible in a mule considering the number of chromosomes that don't add up.

Due to this reason of unevenness in the number of chromosomes present in a mule, meiosis will not occur and if meiosis (gamete formation) does not occur, reproduction cannot take place. Therefore, the mule is a sterile species i.e. cannot produce offsprings via sexual reproduction.

4 0
3 years ago
40 point just answer it
Arte-miy333 [17]

Answer:

C. both sexual and asexual

Explanation:

In both cases, the parent(s) of the offspring pass down characteristics. Asexual reproduction makes a carbon copy of the parent so they would obviously have the parent's characteristics. Sexual reproduction passes down characteristics of both parents to the offspring.

7 0
3 years ago
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