Bears Have Babies While They’re Hibernating

The video explains how bears hibernate during winter, a state of reduced activity called torpor, to conserve energy when food is scarce. Unlike smaller animals, bears maintain a higher body temperature, allowing them to react quickly to threats. During hibernation, female bears give birth, relying on stored fat to nourish themselves and their cubs. This strategy allows them to focus on foraging when food is abundant and protects the cubs from predators. Successful pregnancies depend on sufficient fat reserves, as bears delay embryo implantation until conditions are favorable.

What is the primary reason bears give birth during hibernation?

• To maintain a constant body temperature

• To avoid predators

• To conserve energy

• To ensure cubs are born when food is abundant

How do bears differ from smaller hibernators like squirrels in terms of body temperature during hibernation?

• Bears' body temperature increases

• Bears' body temperature remains almost constant

• Bears' body temperature drops significantly

• Bears' body temperature fluctuates widely

What physiological change occurs in pregnant black bears as their pregnancy progresses?

• Their heart rate decreases

• They stop hibernating

• Their heart rate increases

• They become more active

Why is it crucial for female bears to have sufficient fat reserves before hibernation?

• To avoid predators

• To ensure successful pregnancy and cub survival

• To keep warm during hibernation

• To maintain a high metabolism

What happens to the fertilized embryo in bears if the female does not have enough stored fat?

• It develops into a cub regardless

• It implants immediately

• It is absorbed by the body

• It waits to implant until conditions are right