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bogdanovich [222]
3 years ago
5

Phylogenetic trees ________.

Biology
1 answer:
nirvana33 [79]3 years ago
7 0

B is the correct answer. They can sometimes show an extinction but not always.

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True of false Mendel realized that when he crossed two pea plants that were the offspring of a pea plant with yellow peas and a
Sonbull [250]

Answer:

False

Explanation:

Mendel realized that the F2 had a phenotypic ratio 3:1, meaning 3/4 = 75% were yellow and 1/4 = 25% green.

Mendel observed that the F1 expressed only one of the alternative variants (in this case, only yellow seeds appeared), while the other variant (green) disappeared. Mendel named dominant the expressed variant. Mendel allowed auto pollination and observed that in the second generation, F2, the other disappeared variant reappeared. Both alternative variants were present in the F2. Mendel named recessive the second alternative variant.

Mendel thought that hereditary traits determined by discrete factors were the possible explication for these phenotypes. These factors should have been present in the F1 in pairs. One of them came from one parental plant, and the other factor came from the other plant. These factors then separated again when sex cells were produced, giving two types of gametes, each with only one factor.

Mendel concluded that each individual (plant) has a pair of factors (alleles), one for each trait (yellow and green) and that the pair separates (segregates) during the formation of the gametes. This conclusion is known as the segregation principle (First Mendels´ Low).

4 0
2 years ago
In the northern hemisphere, the ______ occurs on June 21 or 22
Ede4ka [16]
The summer solstice
4 0
3 years ago
In pea plants, the allele for inflated pod seed, I, is dominant over the allele for constricted pod seed, i. The Punnett square
scoundrel [369]

Answer:

II

Explanation:

Since 'I' is the more dominant trait and 'homozygous dominate' is asking for the same dominante feature, II should be the answer

Hope this helps!

:)

7 0
3 years ago
Read 2 more answers
Define bicarpellary​
Olegator [25]

Answer: adjective. Botany (of an ovary) having two carpells.

6 0
3 years ago
An organism like a green plant that can make its own food is called
yKpoI14uk [10]
This type of organism is called an autotroph.They are organisms capable of self-nourishment by using inorganic materials as a source of nutrients and using photosynthesis or chemosynthesis as a source of energy 
3 0
3 years ago
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