Q: What occurs when a substance diffuses through a cell membrane without any help from other molecules? Read this paragraph and choose the correct option from the provided answers: Simple diffusion occurs when a substance diffuses through a cell membrane without any help from other molecules. The substance simply passes through tiny spaces in the membrane. It moves from the side of the membrane where it is more concentrated to the side where it is less concentrated. You can see how this happens in Figure below . Choices: - simple filtration - visible diffusion - visual diffusion - simple diffusion A:
simple diffusion

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Q: What term is used to describe how fast a chemical reaction occurs? Read this paragraph and choose the correct option from the provided answers: How fast a chemical reaction occurs is called the reaction rate . Several factors affect the rate of a given chemical reaction. They include the:. Choices: - response time - catalysis - velocity - reaction rate A:
(Answer)
reaction rate

Ques: Q: Bond lengths are intermediate between covalent single bonds and what? Read this paragraph and choose the correct option from the provided answers: Bond lengths are intermediate between covalent single bonds and covalent double bonds. Choices: - trivalent bonds - wavefunction double bonds - gravitational double bonds - covalent double bonds A:
Ans: covalent double bonds

(Q).
Q: What is the order and family of a meat-eating cat like a tiger? Read this paragraph and choose the correct option from the provided answers: Most chordates are animals with backbones. These range from small fish to giant whales, from playful dogs to ferocious cats. Not nearly as diverse as the invertebrates. But chordates do have many amazing species. The white tiger ( Panthera tigris ) is a chordate. The tiger is also from the class Mammalia, order Carnivora, and family Felidae, meaning it is a meat-eating cat. Choices: - Synapsida felidae - Mammalia felidae - hierarchies felidae - carnivora felidae A:
(A).
carnivora felidae

Ques:Q: The colloquial term "ribbon worm" refers to the mostly marine species of what phylum? Read this paragraph and choose the correct option from the provided answers: Phylum Nemertea The Nemertea are colloquially known as ribbon worms. Most species of phylum Nemertea are marine, predominantly benthic or bottom dwellers, with an estimated 900 species known. However, nemertini have been recorded in freshwater and terrestrial habitats as well. Most nemerteans are carnivores, feeding on worms, clams, and crustaceans. Some species are scavengers, and some nemertini species, like Malacobdella grossa, have also evolved commensalistic relationships with some mollusks. Some species have devastated commercial fishing of clams and crabs. Nemerteans have almost no predators and two species are sold as fish bait. Morphology Ribbon worms vary in size from 1 cm to several meters. They show bilateral symmetry and remarkable contractile properties. Because of their contractility, they can change their morphological presentation in response to environmental cues. Animals in phylum Nemertea show a flattened morphology, that is, they are flat from front to back, like a flattened tube. Nemertea are soft and unsegmented animals (Figure 28.18). Choices: - nematoida - lophophorata - gnathifera - nemertea A:

Ans:nemertea

Ques: Q: What did roots evolve from that plants used for aborption? Read this paragraph and choose the correct option from the provided answers: Roots are vascular organs that can penetrate soil and even rock. They absorb water and minerals from soil and carry them to leaves. They also anchor a plant in the soil. Roots evolved from rhizoids, which nonvascular plants had used for absorption. Choices: - seeds - leguminous - oomycetes - rhizoids A:
Ans:
rhizoids