1. combined to produce
2. combining to produce
3. combining as a product of
4. combined for the production of
1. of two different species
2. with different two species
3. for two species of difference
4. as the difference of two species
1. also are intentionally produced
2. are produced intentionally also
3. can be also intentionally produced
4. can also be produced intentionally
1. is of particular importance
2. looks particularly important
3. have importance particularly
4. are of importance particularly
1. are usually larger and healthier
2. usually are larger and healthier
3. are larger and usually healthier
4. are larger usually and are healthier
1. but more resistant than
2. and more resistant to
3. with more resistance than
4. despite more resistance to
1. features for special plants
2. plants with special features
3. special features from plants
4. special plants with features
1. that has
2. when it has
3. which it has
4. which is having
1. Two of these offspring may be a tree
2. A tree of these two may be the offspring
3. These two may be a tree of the offspring
4. The offspring of these two may be a tree