14. Which immune cells circulate in the body, providing immunity by producing antibodies?

A. Antigens

B. T-cells

C. Lymph Nodes

D. B-cell

Write a short, precise phrase that describes the meaning of each vocabulary term below. For example, a short phrase to describe geologic time scale could be "organized life's history". A. index fossil B. epoch C. ribozyme D. bipedal

What does australia have that is not found elsewhere?

Are they threatened habitats in your area? What factors do you think led to the loss of these habitats? Is it possible for people to settle in a habitat without having a negative impact?

The process by which receptor cells detect stimuli is called:

This is a star less than mass of the main sequence star that has exhausted all of its nuclear fuel and has collapsed to a very small size.

Which is produced immediately after a plant sperm cell fertilizes an egg cell? a. a zygote b. plant nutrients c. sweet nectar d. a spore

In modern classification system, unicellular organisms that contain chloroplasts and a nucleus would be considered; A) annelids B) protists C) archaea D) chordates

The northern copperhead is Agkistrodon contortrix contortrix, the southern copperhead is Agkistrodon contortrix mokasen, and the cottonmouth is Agkistrodon piscivorous. Therefore, A. all are subspecies of Agkistrodon. B.

What's a primary consumer

After plants absorb energy from the sun the energy gets converted into blank energy for the plant to carry out life activities