Answer the following question given this paragraph: Q: The air bubbles resulting from cavitation expand and block water channels of the what? Choices: - heart - respiration - ectoderm - xylem A:
xylem
(Question)
Answer the following question given this paragraph: outcompete the green tint of chlorophyll, making these species appear as varying shades of red. Other protists classified as red algae lack phycoerythrins and are parasites. Red algae are common in tropical waters where they have been detected at depths of 260 meters. Other red algae exist in terrestrial or freshwater environments. Green Algae: Chlorophytes and Charophytes The most abundant group of algae is the green algae. The green algae exhibit similar features to the land plants, particularly in terms of chloroplast structure. That this group of protists shared a relatively recent common ancestor with land plants is well supported. The green algae are subdivided into the chlorophytes and the charophytes. The charophytes are the closest living relatives to land plants and resemble them in morphology and reproductive strategies. Charophytes are common in wet habitats, and their presence often signals a healthy ecosystem. The chlorophytes exhibit great diversity of form and function. Chlorophytes primarily inhabit freshwater and damp soil, and are a common component of plankton. Chlamydomonas is a simple, unicellular chlorophyte with a pear-shaped morphology and two opposing, anterior flagella that guide this protist toward light sensed by its eyespot. More complex chlorophyte species exhibit haploid gametes and spores that resemble Chlamydomonas. The chlorophyte Volvox is one of only a few examples of a colonial organism, which behaves in some ways like a collection of individual cells, but in other ways like the specialized cells of a multicellular organism (Figure 23.24). Volvox colonies contain 500 to 60,000 cells, each with two flagella, contained within a hollow, spherical matrix composed of a gelatinous glycoprotein secretion. Individual Volvox cells move in a coordinated fashion and are interconnected by cytoplasmic bridges. Only a few of the cells reproduce to create daughter colonies, an example of basic cell specialization in this organism. Q: Which are the closest living relations to land plants? Choices: - mammals - arthropods - sporozoans - charophytes A:
(Answer)
charophytes
Ques: Answer the following question given this paragraph: During a massive eruption, all of the material may be ejected from a magma changer. Without support, the mountain above the empty chamber may collapse. This produces a huge caldera . Calderas are generally round, bowl-shaped formations ( Figure below ). Q: Huge calderas form when the mountain above an empty chamber of what collapses? Choices: - gas - mercury - coal - magma A:
Ans: magma
(Q).
Answer the following question given this paragraph: All chemical reactions, even exothermic reactions, need activation energy to get started. Activation energy is needed to bring reactants together so they can react. Q: What do all chemical reactions need to get started? Choices: - expression energy - kinetic energy - potential energy - activation energy A:
(A).
activation energy
Ques:Answer the following question given this paragraph: Plant-like protists are called algae. They include single-celled diatoms and multicellular seaweed. Q: What are plant-like protists called? Choices: - fungi - sponge - spores - algae A:

Ans:algae
Answer the following question given this paragraph: Low sulfur coal produces less pollution when burned than high sulfur coal. Name one factor that affects the sulfur content in coal. Q: What is a benefit of low sulfur coal over high sulfur coal? Choices: - greater enerty - lower cost - less erosion - less pollution A:
less pollution