(Q).
Answer the following question given this paragraph: Bacteria are so small that they can only be seen with a microscope. When viewed under the microscope, they have three distinct shapes ( Figure below ). Bacteria can be identified and classified by their shape:. Q: How are bacteria identified and classified? Choices: - by there movement - by their color - by there cell count - by their shape A:
(A).
by their shape

(Q).
Answer the following question given this paragraph: The head of the sperm contains the nucleus. The nucleus holds the chromosomes. In humans, the nucleus of a sperm cell contains 23 chromosomes. The acrosome on the head contains enzymes that help the sperm penetrate an egg. Q: The head of the sperm contains what, which holds the chromosomes? Choices: - nerve cells - fiber - eggs - nucleus A:
(A).
nucleus

(Q).
Answer the following question given this paragraph: Ribosomes are small organelles and are the sites of protein synthesis (or assembly). They are made of ribosomal protein and ribosomal RNA, and are found in both eukaryotic and prokaryotic cells. Unlike other organelles, ribosomes are not surrounded by a membrane. Each ribosome has two parts, a large and a small subunit, as shown in Figure below . The subunits are attached to one another. Ribosomes can be found alone or in groups within the cytoplasm. Some ribosomes are attached to the endoplasmic reticulum (ER) (as shown in Figure below ), and others are attached to the nuclear envelope. Q: What are the sites of protein synthesis or assembly? Choices: - chloroplasts - chromosomes - plasma - ribosomes A:
(A).
ribosomes