Plants can have elaborate defense systems, and they can respond in sophisticated ways to their environment—for example, in preserving resources, they can go into a dormant state in winter. Given this, can plants have intelligence? Or is it only animals that have this trait, to one degree or another?
Bilateral symmetry is a condition in which:
a. no one animal species can overpower another.
b. the top and bottom halves of an animal are symmetrical.
c. two animal species evolve along parallel lines.
d. one side of an animal is symmetrical to the other.
e. one side of an animal is as strong as the other.
The female Atlantic oyster (Crassostrea virginica) can produce up to 100 million eggs per year, which she broadcasts into the water and provides no care for thereafter. By contrast, a human female will release 13 eggs per year on average (through ovulation), but in most cases will provide years of care to that small fraction of eggs that become fertilized and develop into babies. Why, with movement up the complexity scale in the animal kingdom, does a trend exist toward fewer eggs but greater parental care for each offspring?- Voclasses
A coelom is:
a. an enclosed body cavity, not found in sponges, cnidarians, or flatworms.
b. an enclosed body cavity, found only in vertebrates.
c. a digestive organ, found in all animals except sponges.
d. an example of a type of tissue.
e. an offspring that arises from asexual reproduction.