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nydimaria [60]
3 years ago
14

Which statement is true for chordate nerve cord?

Biology
1 answer:
amm18123 years ago
3 0
Chordates (phylum Chordata) are animals which are either vertebrates or one of several closely related invertebrates. They are united by having, for at least some period of their life cycle, a notochord, a HOLLOW DORSAL NERVE CORD
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Microbiology symbiosis
Helen [10]

do u mean microbial symbiosis?

Answer:

Symbiosis is a relationship between two organisms

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Positive interaction: Mutualism, Syntrophism, Proto-cooperation, Commensalism

Negative interaction: Ammensalism (antagonism), parasitism, predation

6 0
3 years ago
Describe the difference between a food chain and a food web
vivado [14]
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6 0
3 years ago
Read 2 more answers
Which statement is true of both active transport and facilitated diffusion?
enyata [817]

The correct answer is option (D) The active transport and the facilitated diffusion both involve the proteins present in the cell membrane.

Facilitated diffusion transport the large and the charged molecules through the protein transport channels present in the cell membrane. In this case, the solute move from a region of higher concentration to lower concentration and it does not require energy.

Active transports takes place when the molecules move from a region of lower concentration to higher concentration via the membrane protein channels.

Both facilitated diffusion and active transport requires the proteins present in the cell membrane.

7 0
3 years ago
What is theory of to observe the neucles in cheek cells​
solong [7]

Answer: The theory of cheek cells is used for the identification of cheek cells.

Explanation:

The cells of cheek do not have cell wall. They have a cell membrane which allows on certain molecules to pass through it. The nucleus is located centrally in the cheek cells and it stores the DNA. It can be stained with the help of the methylene blue reagent. It appears blue in color which can be observed under the microscope. The cheek cells can be isolated from the buccal cavity by using cotton buds and cotton swabs can help in isolating the cells.

5 0
3 years ago
The researchers introduced a small RNA complementary to a portion of the mRNA encoding protein A into the Brec-MUT cells growing
Sonbull [250]

Answer:

Delivered small RNAs can inhibit protein A production through the RNA interference (RNAi) mechanism, and thus impairs angiogenesis  

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The pregnancy-associated plasma protein-A is a protease enzyme involved in the formation of new blood vessels by increasing insulin-like growth factor I (IGF-I) bioavailability. Moreover, small RNAs (<200 nucleotides in length, generally 18 to 30 nucleotides) are non-coding RNA molecules that function in RNA silencing through the RNA interference (RNAi) pathway. Small RNAs are widely used in molecular biology laboratories because they can be delivered into specific cells in order to silence target mRNAs such as, in this case, the mRNA encoding protein A, by complementary base pairing and thereby inducing translational repression. In consequence, mRNAs complementary to delivered small RNAs are silenced through RNAi pathways, i.e., by cleavage of the target mRNA and/or mRNA destabilization.

3 0
3 years ago
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