Hornworts are the sister phylum to the select one:

a. tracheophytes.

b. mosses.

c. club mosses.

d. mosses, club mosses, ferns and allies, and seed plants.

e. nontracheophytes.

What are types of archaea

When a particular mutagen identified by the Ames test is injected into mice, it causes the appearance of many tumors, showing that this substance is carcinogenic.

1. brain is the main organ of this system respiratory system 2. produces hormones endocrine system 3. breaks food down for body's use excretory system 4. sends nutrients to all the body's cells circulatory system 5.

In a pediatric unit, a child's caregiver asks the nurse, "How is hepatitis B immunoglobulin administered to an infant?" Which statement by the nurse is an appropriate response?

Which one of the following is NOT a cause of acid precipitation? a. sulfur dioxide from burning coal b. nitrogen oxides from car exhaust c. destruction of the ozone layer

Biologists identify four major components in an ecosystem: producers, consumers, decomposers, and the abiotic environment. what links them?

Discuss the meaning and importance of selective toxicity as it relates to antimicrobials.

The plasma proteins involved in fighting infections are

Which of the following statements concerning enzymes is FALSE? A) They are usually, but not always, proteins. B) They function best at 37°C. C) They can be denatured if the pH of their environment is too high or too low.

Why do breeders look at pedigrees before breeding dogs? Or in different words, how do pedigrees play a part in breeding dogs?