No, a creature with summoning sickness cannot block an opponent's creature.
No, you cannot block with a creature that has summoning sickness in Magic: The Gathering.
Yes, summoning sickness can prevent a creature from attacking or using its abilities on the turn it enters the battlefield.
No, creatures with summoning sickness cannot block other creatures.
Defending creatures deal damage to an attacking creature's toughness when they block equal to their power. It's called 'blocking', not 'attacking back'. Summoning sickness has no affect on blocking. Summoning sickness is the inability of a creature to use tap (tap symbol) abilities or attack until the next turn of the owner who summoned it.
In Magic: The Gathering, the keyword "menace" makes a creature harder to block by requiring two or more creatures to block it. This ability can make the creature more threatening and difficult for opponents to deal with in combat.
No, in Magic: The Gathering, you can only block one creature with one creature.
No, you cannot block a creature with protection against your creatures.
Yes, in a game of Magic: The Gathering, you have to tap a creature to use it to block an attacking creature.
In Magic: The Gathering, multiple creatures can block a single creature. There is no limit to the number of creatures that can block a single attacking creature.
Yes, in Magic: The Gathering, you can block more than one creature with a single creature if it has the ability to do so.
Yes, when a creature is assigned to block an attacking creature in a game of Magic: The Gathering, it does tap as part of the blocking process.
No, in Magic: The Gathering, one creature can only block one attacker at a time.