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horrorfan [7]
3 years ago
13

What are pteridophytes?​

Biology
2 answers:
laiz [17]3 years ago
6 0

Explanation:

a flowerless green plant of the division pteridophytes,which comprises the ferns and their relatives

ki77a [65]3 years ago
5 0

Answer:

A pteridophyte is a vascular plant that disperses spores. Because pteridophytes produce neither flowers nor seeds, they are sometimes referred to as "cryptogams", meaning that their means of reproduction is hidden. Ferns, horsetails, and lycophytes are all pteridophytes.

Explanation:

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​In garden peas, tall (T) vine is dominant over short (t) vine, and round pea pod (R) is dominant over wrinkled pea pod (r). Cro
Aleksandr [31]

Answer:

Explanation:

Given:

Traits

T (tall, dominant) and t (short)

R (round, dominant) and r (wrinkle)

Crossing parents

<u>hetero-zygous. tall wrinkled (</u><u>Ttrr</u><u>)</u>

phenotype tall is given hetero-zygous., so Tt

phenotype wrinkled is recessive, so must be homo-zygous rr

<u>Foiled genotypes</u> (Tr, tr, each with 50%)

<u>short hetero-zygous. round (</u><u>ttRr</u><u>)</u>

phenotype short is recessive, so homo-zygous rr

phenotype round is given heteroz. so Rr

<u>Foiled genotypes</u> (tR, tr, each with 50%)

Offsprings on a 4x4 punnett square

See diagram

6 0
3 years ago
What parts of a nucleotide make up the backbone of a nucleic acid? pairs of nitrogen bases pairs of sugars sugar and nitrogen ba
mixer [17]
A DNA molecule consists of two strands of nucleotides twisted together to form a double helix. The sugar-phosphate backbone is found on the outside of this helix and the bases are found braching towards the middle. Hydrogen bonds join the thenitrogenous bases and hold the two strands together.

Therefore your answer is sugar and phosphate.
4 0
3 years ago
Read 2 more answers
Which field studies viruses and bacteria and
tankabanditka [31]

Answer:

Ecology

Explanation:

7 0
1 year ago
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A scientist is planning to carry out an experiment on the effect of heat on the function of a certain enzyme which would not be
ANTONII [103]
If a scientist is planning to carry out such an experiment it wouldn't be appropriate to go and test this right ahead without any serious protection. It is always advised that scientists first collect data after they've created their initial hypotheses and read the required literature.
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Consider the following sentence: "The dog did not eat." Which of the following variations of this sentence is most like a frames
nasty-shy [4]

The answer is D. . . . . . . . . .

4 0
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