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valentina_108 [34]
3 years ago
6

1. What is meant by the term gaseous exchange?

Biology
1 answer:
natali 33 [55]3 years ago
6 0

Explanation:

2=for easy diffusion air

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4. One reason biodiversity is such an important aspect of sustainability is that it
enot [183]

Answer:

9u

Explanation:

8 0
2 years ago
If blood cells don't have a nucleus and don't reproduce, how do we get more blood?
lina2011 [118]

Answer:

Red blood cells are considered cells, but they lack a nucleus, DNA, and organelles like the endoplasmic reticulum or mitochondria. Red blood cells cannot divide or replicate like other bodily cells. They cannot independently synthesize proteins,The nucleus is the cell's brain which controls much of its functions. An animal cell or eukaryotic cell will therefore die without a nucleus. The cell would not know what to do without a nucleus and there would be no cell division. The synthesis of proteins will either stop or shape wrong proteins.When red cells die, hemoglobin is broken up: iron is salvaged, transported to the bone marrow by proteins called transferrins, and used again in the production of new red blood cells

Explanation:

3 0
3 years ago
Explain the relationship between DNA, genes, chromosomes, and traits.
galina1969 [7]

Answer:

Genes are contained in chromosomes, which are in the cell nucleus. A chromosome contains hundreds to thousands of genes. Every normal human cell contains 23 pairs of chromosomes, for a total of 46 chromosomes. A trait is any gene-determined characteristic and is often determined by more than one gene

6 0
2 years ago
How many amino acids are affected by frameshift mutation?
puteri [66]
A reading frame consists of groups of 3 bases that each code for one amino acid<span>. A frameshift mutation shifts the grouping of these bases and changes the code for amino acids. The resulting protein is usually nonfunctional. Insertions, deletions, and duplications can all be frameshift mutations.

Hope this helps.</span>
4 0
3 years ago
The double-stranded DNA molecule of the newly discovered Elradicus libanii has a length of 34 micrometers. How many base pairs a
ddd [48]

Answer:

100 000

Explanation:

The average length of a base pair (bp) is 340 pm [340 × 10^(-12) m]

Length of DNA = No. of bp × length of bp

34 × 10^-6 m = n × 340 × 10^-12 m

n = (34 × 10^-6)/(340 × 10^-12) = 100 000

The DNA molecule contains 100 000 base pairs.

7 0
2 years ago
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