Diatoms function to sequester a significant amount of global carbon dioxide because O Their silica shells are lined with perforations for gas exchange O Their silica shells are resistant to degradation O They are photoautotrophs O They are voracious predators that consume large amounts of methane producing bacteria

11) Turbellarians are free-living worms in Phylum Platyhelminthes. They have a thin, very flat body form. Their body has to be flat because Group of answer choices they need to be able to expand their body when they breathe they need space for their notochord they rely on diffusion across their body wall for gas exchange they do not exhibit any cephalization so this makes them more efficient they have an exoskeleton and they would be too heavy to move if they weren't flat

Describe the morphological and ecological attributes of the red algae? How do they compare to dinoflagellates, diatoms, and brown algae? Are red algae found in Pennsylvania? How are they important to humans? And are they edible?

What is the role that diatoms, dinoflagellates, and green algae play in marine and fresh water ecosystems?

Nostoc and anabaena have specialised cells ealle heterocysts.what is the function of these cells?

Fungi growing on a dead tree are called O Saprobes Phototrophs O Parasites O Autotroph

The pennate diatoms lack motility, but the centric diatoms may possess motility True False

Which are photosynthetic in nature? euglenoids ciliates apicomplexa diatoms amoebas slime molds red algae

Aquatic molluscs have a blood vascular system & metanephridia so they must also possess an unpartitioned coelom secretion kidneys terminal cells a partitioned coelom       If a respiratory pigment such as hemoglobin or hemocyanin is not present in blood the blood would not carry carbon dioxide the blood would not carry oxygen the blood would have decreased oxygen carrying capacity

Humans are most closely related to which of the following? Sea squirts O Frogs O Sharks O Choanoflagellates