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Anton [14]
3 years ago
9

In seed plants, which of the following is part of a pollen grain and has a function most like that of the seed coat?

Biology
2 answers:
Andreyy893 years ago
8 0
The correct answer would be B.
lions [1.4K]3 years ago
5 0

The correct answer is B. Sporopollenin

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True-breeding flies with singed bristles (s) and normal wings (L) were crossed to true-breeding flies with normal bristles (S) a
mina [271]

Answer:

The correct answer is -

Possible F2 offspring genotypes and phenotypes:

SsLl: normal bristle, normal wing

Ssll: normal bristle, vestigial wing

ssLl: singed bristle, normal wing

ssll: singed bristle, vestigial wing

Explanation:

In this case, the genes 's' and 'L' and genes 'S' and 'l' are linked, they will be passed on to the gamete together.

The cross would be as follows:

F1:

Parents: singed bristles and normal wings   x    normal bristles and vestigial wings

Genotype:          ssLL                                                          SSll

Gametes:             sL                                                             Sl

F1:                      SsLl ( normal bristles and normal wings )        

For F2,

Parents: normal bristles and normal wings    x   singed bristles and vestigial wings

Genotypes:            SsLl                                                         ssll

Gametes:                               SL, Sl, sL, sl

Cross:  

          SL        Sl         sL        sl

sl       SsLl     Ssll       ssLl      ssll

Thus the possible offspring will have -

SsLl: normal bristle, normal wing

Ssll: normal bristle, vestigial wing

ssLl: singed bristle, normal wing

ssll: singed bristle, vestigial wing

4 0
3 years ago
Which blood pressure reading is taken when the heart contracts?
butalik [34]

Answer:

systolic

Explanation:

5 0
3 years ago
Which property allows water to resist changes in temperature?
Sholpan [36]
High specific heat allows water to resist temp changes
4 0
3 years ago
List the rules for writing a scientific name.
Ket [755]

Answer:

The binomial name consists of a genus name and specific epithet. The scientific names of species are italicized. The genus name is always capitalized and is written first; the specific epithet follows the genus name and is not capitalized. There is no exception to this.

Explanation:

6 0
3 years ago
Read 2 more answers
Consider two pairs of grandparents. The first pair has 4 grandchildren and the second pair has 32 grandchildren. Which of the tw
schepotkina [342]

Answer:

The second pair of grandparents have approximately 12 to 19 boys as grandchildren.

Explanation:

The probability of a grandchild being a girl or a boy is same, i.e., \frac{1}{2}.

The first pair of grandparents have 4 grandchildren.

The second pair of grandparents have 32 grandchildren.

If first pair of grandparents have between 40% to 60% boys as grandchildren then the number of boys are in the limit,

(40\%\ of 4,\ 60\%\ of 4)=(1.6, 2.4)\approx(2, 3)

Thus, the first pair of grandparents have approximately 2 to 3 boys as grandchildren.

If second pair of grandparents have between 40% to 60% boys as grandchildren then the number of boys are in the limit,

(40\%\ of 32,\ 60\%\ of 32)=(12.8, 19.2)\approx(13, 19)

Thus, the second pair of grandparents have approximately 12 to 19 boys as grandchildren.

So, it is clear that the second pair of grandparents are more likely to have between​ 40% and​ 60% boys as​ grandchildren.

Also according to the law of large numbers as the sample size increases the probability of an event gets closer to the theoretical probability.

5 0
3 years ago
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