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aivan3 [116]
3 years ago
9

A main difference between asteroids and comets is usually NOT: a. Composition B. Size C. Appearance D. Place of origin

Biology
1 answer:
hammer [34]3 years ago
4 0

Answer:A: Composition

Explanation: While asteroids consist of metals and rocky material, comets are made up of ice, dust, rocky materials and organic compounds. When comets get closer to the Sun, they lose material with each orbit because some of their ice melts and vaporizes. Asteroids typically remain solid, even when near the Sun.

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Which of the following contributes to the diversity of an ecosystem?
Luda [366]

Answer:

Increased keystone species

Explanation:

An organism is a keystone species when it contributes to the definition of a given ecosystem such that the absence of the keystone species in an ecosystem, the ecosystem will change dramatically or be gradually wiped out

The effect of the keystone on its environment is unevenly large when compared to its abundance relative among other organisms within the ecosystem

The keystone is therefore, a prime source of balance of nature, diversity and well-being of the ecosystem

Therefore, the option that contributes to the diversity of the ecosystem is;

Increased keystone species.

8 0
3 years ago
Energy is required for cellular growth, development, and repair. In which of the following forms must energy be provided in orde
dimulka [17.4K]

The answer is ATP                          

It make sthe cell function good and i got the asnwer wrong

4 0
3 years ago
A mother carries one allele of a recessive gene for a disease on an autosome, and the father carries no recessive alleles of the
kifflom [539]

What is the likelihood of their child having the disease is:

A. 0%

Explanation:

  • The mother is  heterozygous, thus she has an allele which is recessive and the other allele which is dominant.
  • The father has no recessive allele for the gene.
  • During meiosis in mother , two types of gametes will be produced. One type of gamete will have the recessive allele and the other type of gametes will have dominant allele.
  • During meiosis in father, only one type of gametes will be formed which will have the dominant allele only.
  • In a situation a female gamete with recessive allele is fertilized by a male gamete with dominant allele. The resulting zygote will be heterozygous.The effect of the recessive allele will be masked by the dominant allele and the child will not have the disease.
  • In a situation a female gamete with the dominant allele is fertilized by a male gamete with dominant allele then the resulting zygote will be homozygous  for dominant allele and obvioiusly the individual will not have the disease.
  • Thus, in this case we can conclude that there is 0% chance of child having the disease.
3 0
3 years ago
What is the main difference between a mixture and a pure substance
Gre4nikov [31]

Well a mixture you have to use ingredients to make and a pure substance you don’t need ingredients to make

7 0
3 years ago
What would happen to a forrest ecosystem if a disease killed off all the decomposers?
statuscvo [17]
If that happened there would be dead organisms all over the place!!

Hope this helps!! :-)
5 0
4 years ago
Read 2 more answers
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