Which is the first part of the immune system to attack an invader?

O

A. B cells

B. Macrophages

O

O

C. Lysozymes

O

D. T cells

Most cnidarians are known to produce toxins. In fact, it has been claimed that one particular species produces the most deadly of all toxins on the planet.

An advantage of sexual reproduction over asexual reproduction is that sexual reproduction does what?

The Hawaiian island of Mauna Loa is an active volcano. In areas where lava no longer flows, primary succession is taking place. Which of the following is an example of a pioneer species that can be seen here? Algae Orchids Pineapple trees Sugar cane

What is the benefits of recycling plastic and paper products to wildlife? a. fewer landfills b. less expense c. sustainable energy d. clean fuel

Which of the following mutations could result in a truncated protein? Choose all that apply. Which of the following mutations could result in a truncated protein? Choose all that apply.

Using a pH meter, you find that egg whites have a pH of nearly 8 and egg yolks have a pH near 6, if litmus paper turns blue in bases and red in acids, which part of eggs would turn litmus paper blue? A. both B. egg whites C. egg yolks D. neither

With all his gear neil armstrong weigh 360 pounds on earth when he landed on the moon he weighs 60 pounds why

Is a lion is a carnivore?

The process in which nuclear division occurs

Which did Kepler notice about planetary motion that caused him to propose Kepler's first law of orbital motion?