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belka [17]
2 years ago
14

Pretest: Unit 3

Biology
1 answer:
tankabanditka [31]2 years ago
6 0
The answer is A bc I’m smart
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Lady bird [3.3K]

awnser is high concentrations of oxygen

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3 years ago
If a heterozygous individual of genotype Bb is testcrossed to a recessive parent (bb), what will the phenotypic ratio of the pro
djverab [1.8K]
Bb × bb = 2 Bb : 2 bb = 1 Bb : 1 bb

Thus, the phenotypic ratio would be 1 Dominant Phenotype : 1 Recessive Phenotype.
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2 years ago
10. In which phase will crossing-over occur?
maxonik [38]

Answer:

C. Prohase 1

Explanation:

It is during prophase 1 of meiosis that crossing over occurs before tetrads or homologues pair of chromosomes are alligned across the equator of metaphase 1. In Meiosis 11, only the sister chromatics will be left or remain and the homologues pair of chromosomes would be moved to separate cells.

7 0
2 years ago
How many years ago did wolves begin to evolve into dogs
Mrrafil [7]

Answer:

a long time just kidding

Explanation:

20,000 and 40,000 years ago this can be proved by fossil evidence.

mark me brainliest please!

4 0
2 years ago
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What trait most likely helped young angiosperms in this way? plez help
andrezito [222]

Answer:

Vascular Tissues

Explanation:

Angiosperms higher flowering plants it is most diverse group in a plant kingdom nearly 300,000 species of flowering plants are found under this kingdom.The angiosperms have specialised cells and tissues that carry out their metabolic functions and evolved vascular tissues (xylem and phloem) that translocate the water and nutrient to all parts of the plant. They are terrestrial, root system absorbs water and mineral from the soil. the shoot system supports and leaves involved in the process of photosynthesis

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3 years ago
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