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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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Describe in detail how a heterotrophic organism makes energy available for cellular processes.
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Answer:

Heterotrophs obtain energy by consuming other organisms; Autotrophs obtain energy by consuming the foods they make. ... A Single molecule of glucose stores more than 90 times the energy stored by ATP. ATP transfers energy quickly and is used by the cell as an immediate source of energy.

Explanation:

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8 0
3 years ago
What is the first thing to occur in dna replication?
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4 0
3 years ago
Correct answer gets brainliest.
Vladimir [108]

There are three domains:

the ARCHAEA, BACTERIA, and EUCARYA

oragnisms from ARCHAEA and BACTERIA have a prokaryotic cell structure, whereas organisms from the domain EUCARYA encompass cells wirh a nucleus confining the genetic material from the CYTOPLASM.

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7 0
3 years ago
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Which two cellular organelles in eukaryotes have both electron transport systems and chemiosmotic mechanisms?
aalyn [17]

Answer:

Mitochondria and the chloroplast

Explanation:

Electron transport refers to the transfer of of electrons from electron donors to electron acceptors via a reduction-oxidation reaction.  

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Chemiosmotic mechanisms allow the movement of ions across a semi-permeable membrane down their electrochemical gradient.

In both mitochondria and chloroplast,have these mechanisms for the production of ATP .

7 0
3 years ago
​ A polysome is ____. a. ​ the complex that adds a poly(A) tail onto an mRNA b. ​ an mRNA transcript to which multiple ribosomes
WARRIOR [948]

Answer:b. ​ an mRNA transcript to which multiple ribosomes are attached

Explanation: polysome consist of mRNA complex and two or more ribosome coming together to translate mRNA into a polypetide or amino acid. It helps produce many polypeptide from a single mRNA.

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