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Bumek [7]
4 years ago
14

Gram-positive bacteria have a thick cell wall composed of

Biology
1 answer:
weeeeeb [17]4 years ago
6 0

Answer: peptidoglycan

Gram positive bacterias cell wall is composed of peptidoglycan, a polymer consisting of carbohydrates and peptides, which protects the bacteria.

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rue or false: DNA replication in eukaryotes occurs unidirectionally from multiple origins of replication.
IrinaVladis [17]

Answer:

False

Explanation:

In eukaryotes, replication begins from multiple origins of replication and the replication forks move bidirectionally to replicate the DNA.

6 0
2 years ago
Explain how carbon can move through the organisms in that ecosystem
Ivanshal [37]

Answer: because its a chemical

Explanation: i dont know for sure but here is my theroy the animls eat it and it goes through out the ecosystem i dont want to get into to much detail but it can spread bc its a chemical it has a atomic number of 6

8 0
2 years ago
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In an important experiment, a radioactively labeled bacteriophage was allowed to infect bacteria. In a first trial, the phage co
aliya0001 [1]

Answer: C) the genes of this phage were made of DNA.

Explanation: the experiment described above wherein a radioactively labeled bacteriophage was allowed to infect bacteria ultimately led to the conclusion that the genes of the bacteriophage under study were made of DNA (a biopolymer of deoxyribonucleic acid, which is a type of nucleic acid composed of four different chemical groups, called bases: adenine, guanine, cytosine and thymine). Simply put, the experiment shows that the genetic material of the phage is DNA.

3 0
3 years ago
Does studying fossils show us that life, environments, or both of these change over time?
sp2606 [1]

Well, I know logically that both life and environment change over time. So I think the answer would be C, studying fossils shows us that both life and environments change over time. Hope this helps.

8 0
3 years ago
• 11. Thinking about trophic levels, the type of energy we use from a natural resource comes through a transfer of what, which c
Ber [7]

Answer:

Solar energy    

Explanation:

There are different kinds of energy, and one of them is radiation. By concept, radiation refers to the emission, propagation, and transference of energy in the form of electromagnetic waves or particles.  Living beings depend on solar energy from their origins.  

Throughout the trophic web, there exists a process of energy transference through the different trophic levels, in which every organism feeds on the preceding one and becomes food for the next one. Producers take solar energy and transform it into chemical energy, which is the one from one level to the other.  

<u>Energy flow</u>: From the whole quantity of solar energy that reaches the earth's surface, only 0.1 or 1% is absorbed by autotroph organisms or producers.    

From this input of solar energy, it begins a unidirectional energy flow through all the organisms in the ecosystem, from autotrophs to heterotrophs, until it is finally dissipated in the environment.  

At each trophic level, it occurs an energy transfer from one level to the next, with only 10% being usable in each of them. This assessment is called "The 10% rule". This is, as a general rule, only about 10% of the energy stored as biomass at one trophic level, per unit time, ends up as biomass at the next trophic level, in the same unit of time.

The progressive reduction of energy determines the number of trophic levels (4 or 5).      

6 0
2 years ago
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