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Andrei [34K]
3 years ago
13

A cell is a complex system. Like most systems, a cell contains a boundary that separates things that are inside the system from

those that are outside of the system. Which part of the cell functions as a system boundary
Biology
1 answer:
sineoko [7]3 years ago
6 0
The cell membrane of the cell works as a system boundary. It controls what can enter of leave the cell.
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What are the two ways that organisms on the bottom of deep sea food chains acquire energy? a. photosynthesis and chemosynthesis
aliina [53]

The correct answer is (B)  chemosynthesis and marine snow  are the two ways that organisms on the bottom of  deep sea food chains acquire energy.

What is the meaning of chemosynthesis and marine show?

Chemosynthesis is the utilization of energy supplied by inorganic chemical processes to make food in bacteria and other organisms. To generate a sugar, all chemosynthetic organisms require energy provided by chemical processes, although various species employ different methods.

Marine snow is a shower of biological particles that falls from the upper ocean to the deep sea.  Marine snow refers to biological material that descends from higher in the water column. Some flakes fall for several weeks before reaching the ocean floor.

Learn more about chemosynthesis and marine snow refer:

brainly.com/question/4821668

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7 0
2 years ago
Help needed thx btw.
xeze [42]
Which of the following amino acids can function as a neurotransmitter in the CNS?

1. Glutamic Acid it's because the vital inhibitory neurotransmitter in the CNS.

2. Huntington’s chorea has been linked with a deficiency in the amino acid ______.

Gaba  because its the chief inhibitory neurotransmitter in the mammalian central nervous system. 

3. Which of the following is not considered a monoamine?

Adenosine this has nothing to do with neurotransmitters that's linked to the heart.
7 0
3 years ago
Why are functional MRIs useful to doctors?
tresset_1 [31]

Answer:

measures brain activity by detecting changes associated with blood flow.

Explanation:

5 0
3 years ago
Is the fibula distal to the femur?
Alexxx [7]

Answer:

yes

Explanation:

The femur is the single bone of the thigh. The patella is the kneecap and articulates with the distal femur. The tibia is the larger, weight-bearing bone located on the medial side of the leg, and the fibula is the thin bone of the lateral leg. The bones of the foot are divided into three groups.

5 0
3 years ago
Contrast the genetic content and the origin of sister versus nonsister chromatids during their earliest appearance in prophase I
Bogdan [553]

Answer:

<u>Sister chromatids are identical  forms of chromatids  of a chromosomes. They are mostly  formed by semi-conservative replication of DNA molecule of a single  chromosome.Thus they  are  like  </u><u>'photocopies' </u><u> of  original parent  chromosomes; joined together at the Centromere</u>.

They are exactly similar in all ramification; with the same gene and allele compositions..

<u>However; slight differences  arise between the two identical sisters due to  </u><u>mutation</u><u> from</u><u> errors </u><u>at replication;and also in  the  length of telomere repeats.</u>

Non-sister chromatids are dissimilar forms of  chromatids of a chromosomes formed  when each half of  a chromosome  at fertilisation from separate   haploid sex-cells, of each parent. fused.They contain different genetic composition;because  they are not on the same homologous chromosomes.Therefore crossing -over ensure variation.

<u>However, they are genetically  similar in composition; if they  are contained in homologous chromosomes</u>. This is because Synapsis of bivalent of these chromosomes allow genetic material to be shared by  chromosomal crossing-over between the non-sister chromatids  on the chromosomes ; therefore identical genetic characteristics are shared .

Explanation:

7 0
3 years ago
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