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Y_Kistochka [10]
3 years ago
11

What organism is the first step in food chain/web? what organism is normally first step in aquatic food chain/web?\?

Biology
1 answer:
Solnce55 [7]3 years ago
4 0
Producers, such as kelp or seaweed, are always the first step in a food chain/web.
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The chromosomal mutation in the zygote can be traced back to which of the following? (4.3, 4.4)Immersive Reader
lawyer [7]

The chromosomal mutation in the zygote can be traced back to "Chromosome 6 in the egg cell".

<u>Option: B</u>

<u>Explanation:</u>

In germ cells i.e. egg or sperm cells, the mutations in chromosome often happen during the meiosis phase. The number of chromosomes in egg cells or sperm cells must be haploid, so that diploid chromosomes form zygote on fertilization. Chromosome mutation in meiosis leads in an additional set of chromosomes or structural defects in the chromosome.

Chromosomal mutations are often caused by chemical agents or by mutagens. The homologous chromosomes are segregated from sister chromatids throughout cell division, any abnormality at this point allows the chromosomes to be unequally divided or not disjuncted, same is observed in the situation seen in egg cell chromosome 6.

3 0
3 years ago
What time of year is chlorophyll present in deciduous plants?
just olya [345]

Answer: Autumn

Explanation:

3 0
3 years ago
What quantity is equal between two solutions that are isotonic ?
bazaltina [42]

An isotonic solution is a solution in which the amount of dissolved material is equal both inside and outside of the cell. Water still flows in both directions, but an equal amount enters and leaves the cell.  Hope this helps. :)

8 0
3 years ago
Which of these is thickes layer of earth
Vadim26 [7]

Answer: core

Explanation:

The core is the thickest layer of the Earth, and the crust is relatively thin, compared to the other layers.

5 0
2 years ago
How did you determine the types of cell division for both phases depicted in your model? Explain your answer.
klasskru [66]

Answer:

Cell division is a process that makes our skin, tissues, muscles, sex cells etc. It is the building block of our body.

Explanation:

When parents cells ahs been divided into two or more than two daughter cells then it is called division of cells. The division of cells occur as a larger cell. When we talk about eukaryotic cells, these cells divided into two distinct types of the cells, the vegetative cells.

The daughter cells are the identical to the parents cells genetically. There are two types of division such as mitosis and meiosis. When parents cells divides in daughter cells and daughter cells divided further, this process called the cells cycle. The mitosis cell division occur interphase. Meiosis cell division occur in two phase meiosis I and meiosis II.

3 0
3 years ago
Read 2 more answers
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