Answer the following question given this paragraph: 3.3 The Nucleus and DNA Replication The nucleus is the command center of the cell, containing the genetic instructions for all of the materials a cell will make (and thus all of its functions it can perform). The nucleus is encased within a membrane of two interconnected lipid bilayers, side-by-side. This nuclear envelope is studded with protein-lined pores that allow materials to be trafficked into and out of. Q: What is the name of the command center of the cell? Choices: - mitochondria - molecules - vacuole - nucleus A:
nucleus
Answer the following question given this paragraph: Producers are organisms that produce food for themselves and other organisms. They use energy and simple inorganic molecules to make organic compounds. The stability of producers is vital to ecosystems because all organisms need organic molecules. Producers are also called autotrophs. There are two basic types of autotrophs: photoautotrophs and chemoautotrophs. Q: What is another name for producers? Choices: - plants - rotifers - allergens - autotrophs A:
autotrophs
Q: Answer the following question given this paragraph: Leaves, Sporophylls, and Strobili A third innovation marks the seedless vascular plants. Accompanying the prominence of the sporophyte and the development of vascular tissue, the appearance of true leaves improved their photosynthetic efficiency. Leaves capture more sunlight with their increased surface area by employing more chloroplasts to trap light energy and convert it to chemical energy, which is then used to fix atmospheric carbon dioxide into carbohydrates. The carbohydrates are exported to the rest of the plant by the conductive cells of phloem tissue. The existence of two types of morphology suggests that leaves evolved independently in several groups of plants. The first type of leaf is the microphyll, or "little leaf," which can be dated to 350 million years ago in the late Silurian. A microphyll is small and has a simple vascular system. A single unbranched veina bundle of vascular tissue made of xylem and phloemruns through the center of the leaf. Microphylls may have originated from the flattening of lateral branches, or from sporangia that lost their reproductive capabilities. Microphylls are present in the club mosses and probably preceded the development of megaphylls, or "big leaves", which are larger leaves with a pattern of branching veins. Megaphylls most likely appeared independently several times during the course of evolution. Their complex networks of veins suggest that several branches may have combined into a flattened organ, with the gaps between the branches being filled with photosynthetic tissue. In addition to photosynthesis, leaves play another role in the life of the plants. Pine cones, mature fronds of ferns, and flowers are all sporophyllsleaves that were modified structurally to bear sporangia. Strobili are cone-like structures that contain sporangia. They are prominent in conifers and are commonly known as pine cones. Q: What are the cone-like structures that contain sporangia called? Choices: - contrail - medulla - gametes - strobili A:
A: strobili
Question: Answer the following question given this paragraph: Mendel summarized his findings in two laws: the Law of Segregation and the Law of Independent Assortment. The Law of Segregation is based on his findings from his first set of experiments. Mendel stated that heritable factors are segregated during gamete formation. More precisely, this law states that a pair of alleles is separated, or segregated, during the formation of gametes. During meiosis, homologous chromosomes are randomly separated. Each resulting gamete has an equal probability or chance of receiving either of the two alleles. In other words, each gamete has only one allele for each gene. Q: Which law states that a pair of alleles is separated, or segregated, during the formation of gametes? Choices: - de facto segregation - law of equals - separation anxiety - law of segregation A:
Answer: law of segregation
*Question*
Answer the following question given this paragraph: Grain boundaries. As a polycrystalline material solidifies, grains with irregular shapes form. The interfaces between grains constitute grain boundaries. (Squares represent unit cells within grains. Q: As a polycrystalline material solidifies, grains with irregular shapes form. the interfaces between grains constitute grain what? Choices: - waves - patterns - obstacles - boundaries A:
**Answer**
boundaries
*Question*
Answer the following question given this paragraph: Terrestrial biomes include tropical rainforest, temperate grassland, and tundra. Q: Tropical rainforest, temperate grassland, and tundra are examples of what type of biomes? Choices: - atmospheric - oceanic - horizontal - terrestrial A:
**Answer**
terrestrial