Which of the following animal groups is entirely aquatic?

A) Mollusca

B) Crustacea

C) Echinodermata

D) Arthropoda

E) Annelida

why would you predict that females in species with internal fertilization and long periods of gestation would be choosier in selecting their males than females in other species

During an experiment what factor is observed and measured? a. dependent variables b. independent variable c. constants d. hypotheses

Low energy, fatigue, weight gain, dry skin, hair loss, and constipation are some symptoms associated with a decreased production and secretion of which hormone?

A pack of dog is considered which level of bioligical organization

Write down at least 5 facts you know already about cells

Which of the following are examples of ways humans and plants have coevolved? Pick all that apply A. Humans have bred plants to use as food B. Plants provide a source of nitrogen C. Humans aid in pollinating plants D.

By what mechanism does PI-3 phosphate promote activation of protein kinase B (PKB) ? a. recruiting PKB to the plasma membrane b. recruiting the activating kinase PDK1 to the plasma membrane c.

What is the definition of "Mass"?

Which of the following is a correct statement? Select one: a. If you want to make a cDNA library, it doesn't matter which tissue you isolate the mRNA from. b.

In fruit flies long wings (W) are dominant to short wings. What is the phenotype of the known parent