Answer the following question given this paragraph: Types of chemical reactions include synthesis, decomposition, replacement, and combustion reactions. Q: Synthesis, decomposition, replacement, and combustion are all types of what reaction? Choices: - natural - toxic - mineral - chemical A:
chemical
Answer the following question given this paragraph: Unlike the sponges which evolved prior to cnidarians, the cnidarians are made up of true tissues. The inside of a cnidarian is called the gastrovascular cavity , a large space that helps the organism digest and move nutrients around the body. The cnidarians also have nerve tissue organized into a net-like structure, known as a nerve-net, with connected nerve cells dispersed throughout the body. Cnidarians do not have true organs, however. Q: What is a large space that helps the organism digest & move nutrients around the cnidarian body? Choices: - thorax - abdominal wall - vacuole - gastrovascular cavity A:
gastrovascular cavity
Q: Answer the following question given this paragraph: Sliding friction is friction that acts on objects when they are sliding over a surface. Sliding friction is weaker than static friction. That's why it's easier to slide a piece of furniture over the floor after you start it moving than it is to get it moving in the first place. Sliding friction can be useful. For example, you use sliding friction when you write with a pencil. The pencil "lead" slides easily over the paper, but there's just enough friction between the pencil and paper to leave a mark. Q: What type of friction is friction that acts on objects when they are sliding over a surface? Choices: - spreading friction - static friction - rolling friction - sliding friction A:
A: sliding friction
Question: Answer the following question given this paragraph: Life on Earth began about 3.5 to 4 billion years ago. The first life forms were single-celled organisms similar to bacteria. The first multicellular organisms did not appear until about 610 million years ago. Many different types of organisms evolved during the next ten million years, in an event called the Cambrian Explosion . This sudden burst of evolution may have been caused by some environmental changes that made the Earth's environment more suitable for a wider variety of life forms. Q: What were the first life forms found on earth similar to? Choices: - mold - ferns - viruses - bacteria A:
Answer: bacteria
*Question*
Answer the following question given this paragraph: Pollination occurs when pollen is transferred from a male to female cone. If sperm then travel from the pollen to an egg so fertilization can occur, a diploid zygote results. The zygote develops into an embryo within a seed, which forms from the ovule inside the female cone. If the seed germinates, it may grow into a mature sporophyte tree, which repeats the cycle. Q: If pollination occurs, what does the zygote develop into? Choices: - an ovum - a sperm - an egg - an embryo A:
**Answer**
an embryo
(Q).
Answer the following question given this paragraph: A general plant life cycle is represented by the diagram in Figure below . From the figure, you can see that the diploid sporophyte has a structure called a sporangium (plural, sporangia) that undergoes meiosis to form haploid spores. A spore develops into a haploid gametophyte. The gametophyte has male or female reproductive organs that undergo mitosis to form haploid gametes (sperm or eggs). Fertilization of gametes produces a diploid zygote. The zygote grows and develops into a mature sporophyte, and the cycle repeats. Q: What is the structure in a diploid sporophyte that undergoes meiosis to form haploid spores? Choices: - hymenium - dikaryotic - hyphae - sporangium A:
(A).
sporangium