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Vsevolod [243]
2 years ago
12

* What helps prevent bacteria from entering your lungs? * HURRY!

Biology
1 answer:
masya89 [10]2 years ago
7 0

Answer:

MUCUS

Explanation:

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6 0
2 years ago
tall heterozygous pea plants were crossed and the resulting seeds grown. Out of 360 plants, 270 were tall and 90 dwarf. What des
lozanna [386]

Answer:

This question lacks options, the options are:

A. All 270 tall plants were heterozygous

B. All 270 tall plants were homzygous.

C. Only 90 plants were homzygous.

D. All dwarf plants were homzygous.

The answer is D.

Explanation:

This question involves a single gene coding for height in pea plants. The allele for tallness (T) is dominant over that of dwarfness (t). This means that a dwarf plant can only be homzygous recessive (tt) while a tall plant can either be homzygous (TT) or heterozygous (Tt).

According to the question, two tall heterozygous pea plants were crossed i.e. Tt × Tt. Based on this cross, a phenotypic ratio of 3:1 is expected, which is in accordance with the 270 tall plants and 90 dwarf plants (360 total) that was obtained in the cross. Since dwarfism in pea plants is a recessive trait, this means that all the dwarf plants produced in this cross (90) were homzygous (tt).

3 0
3 years ago
Answer some of this questions about Hellen Keller start chap 3 please help me
Allushta [10]
Chapter 3:
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Chapter 4:
1. Because she is blind and deaf.
3. She lacks remorse/sympathy because she is blind and deaf and does not sense the environment.
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