No that's aphids, bees are collect pollen and nectar.
No, bees collect nectar from nectary glands and pollen from the anthers in their pollen sacks. A lot of pollen also gets stuck to them elsewhere, and this can brush off in other flowers to pollinate them.
Honey is mostly made from nectar, a sugary liquid which bees collect from flowers. Sometimes bees will collect a substance called honeydew, which is sugar-rich sticky substance, secreted by aphids and some scale insects as they feed on plant sap.
Beekeepers will feed their bees sugar-syrup before winter and in early spring - a mixture of water and sugar.
Firstly, bees don't eat aphids: they are strictly vegetarian and eat nectar, pollen and honeydew, and it is the honeydew that is the problem here. Aphids feed on plant sap by puncturing the leaves with their mouth parts. Sap is mainly water so they need a lot of sap to get all the nutrients they require, and they excrete the surplus as honeydew. This is what the bees feed on. Unfortunately certain trees, such as lime, have narcotic or toxic chemicals in their sap which don't affect the aphids but when concentrated in the honeydew will stupefy or kill the bees.
The worker bees go out to collect pollen and nectar which they bring back to the Hive for food and to make honey. Honey bees eat honey and pollen as their primary food, but they also gather liquids and juices from plant and fruit exudates. When honey bees come across insects that secrete honeydew, they gather the liquid and store it as honey. When pollen, nectar, or honeydew aren't available, honey bees can collect and store plant spores and dusty animal feed as well.
Worker bees.
Bees collect nectar from flowers and then produce honey.
Honey bees are likely visiting your live oak acorns to collect the sweet secretions, known as honeydew, produced by certain insects that may be feeding on the acorns. Additionally, they might be foraging for pollen if any flowers or other plants are nearby. Acorns themselves are not a primary food source for bees, but they can be attracted to the area due to the presence of other resources.
Honeydew is produced by aphids and related insects who suck the sap out of resinous trees. Most of the sap passes through their bodies and crystalises on the plant. Bees are very attracted to this honeydew and the honey they make from what is actually the excrement of the aphids is popular in some circles.
Yes, bees collect nectar from flowers of the plants
Bees collect pollen and nectar from open flowers, and they also collect propolis -- a resinous substance -- from buds, particularly tree buds.
pollen grains
Bees eat nectar and pollen that they collect off of the flowers. Honey bees will even eat the honey that they make from the pollen that they collect.