Which cell structures are present in mature sieve tube cells, but not in mature vessel elements? Select all that apply. smooth endoplasmic reticulum nucleus mitochondria cytoplasm cell wall

A complex chemistry is most related to

Cyanide (C≡N-) blocks complex IV of the electron transport chain. Suggest a hypothesis for what happens to the ETC when complex IV stops working. Your hypothesis should explain why cyanide poisoning in humans is fatal.

The two most closely related organisms are the

Which part of a root transports water and nutrients? a. epidermis b. root cap c. vascular system d. cortex

What substance is absorbed in large quantities by rain forests

In Drosophila, successful mating is frequently dependent upon an elaborate courtship "dance" performed by the male. Over 200 species of these fruit flies occur on the Hawaiian Islands.

Write a sentence that explains how each pair of terms are related. 1. cystic fibrosis - mutation 2. biopsy - metastasis 3. carcinogen - melanoma 4. multifactorial disorder - heart disease 5. MRI scan - CAT scan

What's the biggest change to San Joaquin Valley ecosystems caused by humans in the past 150 years?

What Is the Myocardium?

How does the dna repair enzyme photolyase prevent skin cancer?