The main aspect used to differ coniferous tree are their leaves. Coniferous leaves look like elongated needles, instead of the regular flatend out leaves we're used to
Further characteristics:
Seeds are hard and grow in large groups, stuck to eachother.
Coniferous are evergreen trees (don't shed leaves nor change the colour of these, although this rule does not apply to all of them).
They have spread worldwide.
Can withstand low temperaurees and can be found even in places like the Artic circle.
I've pasted some images down below that might help you a lot. (Left - leaves; Right - coniferous trees).
Hope it helped,
Happy homework/ study/ exam!
Answer:
natural selection- if the mutation is more helpful than regular genes it will prevail better in the gene pool
Explanation:
Answer:
you expect to see that 75% of your F2 generation rabbits have floppy ears and 25% of your rabbits have black fur.
Explanation:
<u> Available data:</u>
- Two true-breeding groups of rabbits.
- The first group has floppy ears and white fur.
- The second group has straight ears and black fur.
- 100% of the F1 generation has floppy ears and gray fur.
- Each of these traits is determined by a single gene and undergo independent assortment.
Having this information we can infer that floppy years, expressed by F allele, might be dominant over straight ears, expressed by f allele. And that the fur color is affected by incomplete dominance, being B the allele expressing black color, b the allele expressing white color and Bb the genotype for grey color.
Incomplete dominance is a condition where neither of the alleles completely dominates over the other one. Descendents possess an intermediate phenotype between the two parental phenotypes and not the dominant one.
Cross between groups
Parental) FFbb x ffBB
F1) FfBb
<u>Cross for the ear traits:</u>
Parental) Ff x Ff
Gametes) F f F f
Punnet square) F f
F FF Ff
f Ff ff
F2) 75% of the progeny have floppy ears, FF and Ff
25% of the progeny have straight ears, ff
<u>Cross for the fur color traits</u>:
Parental) Bb x Bb
Gametes) B b B b
Punnet Square) B b
B BB Bb
b Bb bb
F2) 25% of the progeny have black fur, BB
50% of the progeny have grey fur, Bb
25% of the progeny have white fur, bb
The answer is d clinical deficiency
The sediments rub together to become smoother. Sediments which are transported in a mass by water or stream are in motion with respect to the motion of the stream water. They bump into each other which makes extruding parts vulnerable to getting knocked off which makes these particles round after a while.
