Which does the work of the immune system?

a. neurons

b. hormones

c. lymphocytes

d. enzymes?

Which of the following plant organs contains the highest concentration of chloroplasts responsible for photosynthesis? a. Flowers b. Roots c. Stems d. Leaves

Why is adaption necessary for species survival?

During which stage of the cell cycle is cell growth and replication of organelles most significant

What do people who have hemophilia look like?

Nelly was reading about ecological pesticides. She found a website that said that skeletons of some organisms settle as sediments in the ocean. They are then used as pesticides because they are abrasive against pests.

Why do all organisms take in matter and rearrange atoms through chemical reactions to form molecules essential for life?

A biologist counts the number of zebras in a population each year and notices an increase in the zebra population. Which describes the biologist's actions? experimentation inference observation interacting

Which is one of the seven characteristics that Mendel observed in pea plants? flower size seed texture leaf shape stem color

When enough experimental data support a hypothesis, the hypothesis becomes a what

Ezpz escape answer key station 1 cells