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Solnce55 [7]
3 years ago
6

In which phase of meiosis 1 do homologues separate?

Biology
1 answer:
Nitella [24]3 years ago
7 0
In phase meiosis 1 the homologous separate due to the chromosomes.
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A researcher has developed two stains for use with seed plants. One stains sporophyte tissue blue; the other stains gametophyte
sukhopar [10]

Answer:

A) The pollen grains will be pure red.

Explanation:

Plants have alternation of generations, this means that there are two different stages in their life-cycle: a sexual haploid (n) phase and an asexual diploid phase (2n). These phases occur in different individuals, so there is an haploid plant called gametophyte that carries gametes and after fecundation, it will rise a diploid sporophyte (asexual).  

In seed plants, the sporophyte is the plant that we normally see, and the gametophyte is reduced into an organ of the sporophyte. The male gametophyte is the pollen that is produced in the sporangium in anthers (parts of sporophyte).  When a pollen grain fecundes a female gametophyte (egg), it will produce a diploid embryo or new sporophyte.

Therefore, if the researcher exposes pollen to both stains, these grain will stain red, because red stain identifies gametophyte tissue.

3 0
3 years ago
In vertebrates with a double-loop circulation as illustrated in Figure 27–4, the loop that passes through the lungs is responsib
egoroff_w [7]
The correct answer among the choices provided is option A. Lung capillaries are responsible for exchanging carbon dioxide for oxygen from the air. Blood that comes from the heart gets oxygen from the alveoli. The carbon dioxide in the blood goes into the alveoli at the same time.
3 0
3 years ago
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Sydney wants to explain the concept of the axial and appendicular skeleton.if she uses an analogy of a coat rack,what would the
stealth61 [152]

The area residing in the center explains the bilatial tibulti, which precedents the bratuluti tubilitu. As for the rack itself, it has a half-moon (in laymens terms) axial, which appendages smoothly in all transition. The answer would certainty relate less to moving and a part itself, and more towards coordination or other terms (for which there are many), as this question is quite subjective.

In short, it has nearly free half-moon movement, though blocked in transition by its own quartsor axial.

5 0
3 years ago
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Sexual reproduction
ruslelena [56]

Sexual reproduction is a form of reproduction where two gametes fuse together. Each gamete contains half the number of chromosomes of normal cells. They are created by a specialized type of cell division, which only occurs in eukaryotic cells, known as meiosis.

So i'm gonna say that the answer is..B. helped maintain a slow rate of evolutionary change.

7 0
3 years ago
Segments of DNA that contain the code for specific proteins are called _____.
VLD [36.1K]

These segments of DNA that contain the code for specific proteins are called genes.

Actual coding region of DNA are called exons.

Explanation:

A segment of DNA that codes for one distinct protein is called a gene. Each chromosome carries thousands of various genes. The genetic code of the DNA ever prevails protected inside the nucleus.

a gene is a stretch of DNA. Nucleotide consists of a sugar, phosphate and a base.. Genes are organized and packaged in units named “chromosomes.” Humans have 23 pairs of chromosomes.

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3 years ago
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