What percentage of animals on earth are vertebrates

a. 5

b. 25

c. 50

d. 90

You analyze a DNA sample and find that its base composition is 30% A, 20% T, 30% G, and 20% C. What can you conclude about the structure of this DNA? Because A equals G, and T equals C, this must be a double-stranded DNA molecule.

Use rough endoplasmic reticulum in a sentence

Suppose you water a potted plant in place at by a window in a transparent airtight jar predict how the rate of photosynthesis might be affected over the next few days what might happen if the plant were left there for several weeks explain

Often there are no predators for invasive species. True False

An insect is called a during the period of inactivity associated with complete metamorphosis.

According to the periodic table, hydrogen is considered to be?

Why do people with "inherited cancer" often develop cancer at a relatively young age

0.00855 converted in scientific notation

An environment has a carrying capacity of 250 for species a, and a carrying capacity of 400 for species b. the rate of growth for species a is 0.2, and the competitive effect of species b on species a is 0.25.

1. the idea that the sporophyte generation and the gametophyte generation follow one another in alternating fashion perennial 2.