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zheka24 [161]
3 years ago
10

Archaeplastida, which include red and green algae and land plants, are thought to have descended from a heterotrophic protist th

at engulfed a(n) _____.
Biology
1 answer:
mafiozo [28]3 years ago
4 0

Answer:

The correct answer is - cyanobacterium.

Explanation:

According to the endosymbiotic theory eukaryotic cells are rise through the engulfing the endosymbiotic cyanobacteria by prokaryotic cells and from cells with specialized cell structure like chloroplast and mitochondria.

Archaeplastida are all the plant kingdom with red green algae and land plants included in this group are descended from heterotropic protist by the process of engulfed an cyanobacteria.

Thus, the correct answer - cyanobacteria.

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Answer:

See the answer below

Explanation:

1. <u>Only one phenotype</u> is present in the F1 generation offspring. Since tallness was dominant over shortness, all the offspring in the F1 generation appeared tall.

2. <u>Two phenotypes </u>are present in the F2 generation - 9 tall and 3 short. The short trait reappeared at the F2 generation.

3. The genotype of the F1 offspring would be heterozygous. Assuming the purebred tall is AA and the purebred short is aa:

     AA   x   aa

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All the F1 offspring will appear tall and their genotypes would be heterozygous.

4. Assuming that the allele for height is denoted with A (a), <u>the genotype of the purebred tall plant would be AA. </u>

5. In a similia vein, <u>the genotype of the purebred short plant would be aa. </u>

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3 years ago
True or false the typical X shaped chromosomes is the result of DNA replication​
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Answer:

True

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Truly, the typical X shaped chromosomes is the result of DNA replication. When the DNA has replicated, it then condenses and coil into the X-shaped of the chromosome. This then implies that replicated chromosomes take the X-shaped structures seen under a microscope.

When this replication occurs, the chromosome is made of two structures that are identical. They are known as the sister chromatids. These chromatids are actually joined at the centromere.

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How could the speed and direction of motion of an object be changed?
kifflom [539]

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Unbalanced forces can cause an object to change its motion.

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