Answer the following question given this paragraph: Mammals are a class of endothermic vertebrates. They have four limbs and produce amniotic eggs. Examples of mammals include bats, whales, mice, and humans. Clearly, mammals are a very diverse group. Nonetheless, they share many traits that set them apart from other vertebrates. Q: Mammals belong to which class of vertebrates? Choices: - agnathas - chondrichthyes - placoderms - endothermic A:
endothermic
Answer the following question given this paragraph: Early Embryonic Development Fertilization is the process in which gametes (an egg and sperm) fuse to form a zygote (Figure 18.8). To ensure that the offspring has only one complete diploid set of chromosomes, only one sperm must fuse with one egg. In mammals, a layer called the zona pellucida protects the egg. At the tip of the head of a sperm cell is a structure like a lysosome called the acrosome, which contains enzymes. When a sperm binds to the zona pellucida, a series of events, called the acrosomal reactions, take place. These reactions, involving enzymes from the acrosome, allow the sperm plasma membrane to fuse with the egg plasma membrane and permit the sperm nucleus to transfer into the ovum. The nuclear membranes of the egg and sperm break down and the two haploid nuclei fuse to form a diploid nucleus or genome. Q: In mammals, what layer protects the egg? Choices: - Choloza - Germinal Disc - Albumen - zona pellucida A:
zona pellucida
Q: Answer the following question given this paragraph: Ecologists also study how individuals in a population are spread across an environment. This spacing of individuals within a population is called dispersion . Some species may be clumped or clustered ( Figure below ) in an area. Others may be evenly spaced ( Figure below ). Still others may be spaced randomly within an area. The population density and dispersion have an effect on reproduction and population size. What do you think the relationship is between population density, dispersion and size?. Q: What is the term for the spacing of individuals within a population? Choices: - suspension - equilibrium - population density - dispersion A:
A: dispersion
Question: Answer the following question given this paragraph: Q: What bonds form when pairs of electrons are shared? Choices: - ionized bonds - neutron bonds - dissonance bonds - covalent bonds A:
Answer: covalent bonds
*Question*
Answer the following question given this paragraph: A species is a unique type of organism. Members of a species can interbreed and produce offspring that can breed (they are fertile). Organisms that are not in the same species cannot do this. Examples of species include humans, lions, and redwood trees. Can you name other examples?. Q: A unique type of organism is also known as what? Choices: - taxonomy - parasites - element - species A:
**Answer**
species
*Question*
Answer the following question given this paragraph: Q: Triploblasts include a broad range of animals, from flatworms to arthropods to what? Choices: - cells - mammals - invertebrates - vertebrates A:
**Answer**
vertebrates