alex asked:


1) many different modes of reproduction have evolved in sexual species. organisms with distinct sexual identities in different individuals are the norm but variants do exist. species with separate male and female individuals are called

a. dioecious if plants and gonochoristic if an animal
b. monoecious if a plant or hermaphroditic

2) some flowers and some animal groups possess both male and female reproductive systems. which of the groups below have evolved both sets of reproductive systems in the same individual?

a. avacado trees
b. hibiscus, pine trees, pea plants and corn plants
c. tapeworms, leeches and earthworms
d. all except for a

Aaron

rhodeswatson asked:


I am not asking for a political opinion. I am asking for a biological opinion as to why all the Ponderosa Pines are being killed in Arizona. Is that clear?

Chase

embroidery fan asked:


I have a Blue Spruce tree in my front yard. It’s about 15 years old. This year, for the first time, I’ve noticed rust-colored branches occurring throughout it. Do you have any idea of the cause(s) of it, or any treatment(s) I should use?

Thanks for your help!

Jesus

Moose187 asked:


The has been accounts of this species of hardy palms growing in Canada and, more commonly, Switzerland. I wanted to replace the pine trees in my front yard with them.

Zachary

Joesph B asked:


I have a car crash in my yard and hit a very old oak of mine, the only damage that was done to the tree was a 12″ x 8″ peice of bark was knocked off the base of the tree, its not cracked or anything else what can i do to save my very old tree…..

Benjamin

Robert P asked:


My details: 1) The spots are either under or near trees that are 20+ years old 2) lots of tiny, tiny (web-like) surface roots are in these bare spots 3) no pets to cause problems 4) lawn is self-irrigated 5) trees have recently been trimmed by a professional arborist to allow light to come through to lawn 6) the rest of the lawn is healthy and thriving 7) a fertilizer company puts 5 lawn treatments on my yard each season these bare spots are growing larger each season and I want to stop this. Any help would be much appreciated! Thank you!

Matthew

laurietokarski@sbcglobal.net asked:


6 and 7ft tree’s now

Ian

dutara asked:


Two or three died, but most lived but most have bark peeling off at ground level to half way up trunks…trees are mostly water oaks, mostly mature, some 30 to 40 feet tall. The bark peel worries me because it was symtomatic of the ones that eventually died…but the ones that made it are hanging on..they look o.k. and leaves are healthy…the ones that died, died quick..Should I do anything to the trees that are peeling bark?

Grace

Kelloggs asked:


1. How have apples evolved to ensure their seeds will be dispersed?
2. What plants do bats, squirrels and woodpeckers help with seed dispersal?
3. How does the African melon manage to transport its seeds to new locations?
4. Describe how natural selection prompted the evolution of the Calvaria tree on the island of Mauritius.
5. How does the extinction of the dodo bird impact the survival of the Calvaria?
6. How is the survival of some plant species tied to periodic fires?
7. How is survival of the Jack pine related to survival of the Kirtland’s warbler?
8. Describe the link between fire, seed germination and nitrogen dioxide gas.
9. How do Whispering bells that live in desert environments prepare seeds for germination?
10. Describe “terminator technology;” what it is and why it was developed.

Anyone know the anwsers?

Robert

Donna T asked:


I thought real trees were supposed to smell great. BUT this tree really has no smell unless u get real close and take a whif of the branches…just curious as to why? We bought it from our neighborhood garden mill.

Gavin