Answer the following question given this paragraph: The structure of a chloroplast shows how membrane and molecular architecture helps life processes. A chloroplast consists of thylakoid membranes surrounded by stroma. The thylakoids stack on top of each other, like a stack of pancakes. The thylakoid stacks arrange chlorophyll, accessory pigment molecules, and photosynthetic proteins to capture sunlight and allow a concentration of ions within the sacs. You can see the green color of the chlorophyll. You cannot see the electron carriers, sequenced within the sac membranes, but their arrangement helps harvest small amounts of energy from excited electrons. The thylakoid membranes contain molecules of the green pigment chlorophyll. Q: Thylakoid membranes contain molecules of what green pigment used in photosynthesis? Choices: - carbonate - sodium - copper - chlorophyll A:
chlorophyll
(Question)
Answer the following question given this paragraph: Q: How is the chance of survival affected when animals lack parental care? Choices: - variable - unaffected - increased - decreased A:
(Answer)
decreased
Ques: Answer the following question given this paragraph: The epidermis is the outer layer of skin, consisting of epithelial cells and little else (see Figure below ). For example, there are no nerve endings or blood vessels in the epidermis. The innermost cells of the epidermis are continuously dividing through mitosis to form new cells. The newly formed cells move up through the epidermis toward the skin surface, while producing a tough, fibrous protein called keratin. The cells become filled with keratin and die by the time they reach the surface, where they form a protective, waterproof layer called the stratum corneum. The dead cells are gradually shed from the surface of the skin and replaced by other cells. Q: What is the outer layer of skin, consisting almost entirely of epithelial cells? Choices: - hypodermis - connective tissue - dermis - epidermis A:
Ans: epidermis
(Q).
Answer the following question given this paragraph: Of the four nerve plexuses, two are found at the cervical level, one at the lumbar level, and one at the sacral level (Figure 13.24). The cervical plexus is composed of axons from spinal nerves C1 through C5 and branches into nerves in the posterior neck and head, as well as the phrenic nerve, which connects to the diaphragm at the base of the thoracic cavity. The other plexus from the cervical level is the brachial plexus. Spinal nerves C4 through T1 reorganize through this plexus to give rise to the nerves of the arms, as the name brachial suggests. A large nerve from this plexus is the radial nerve from which the axillary nerve branches to go to the armpit region. The radial nerve continues through the arm and is paralleled by the ulnar nerve and the median nerve. The lumbar plexus arises from all the lumbar spinal nerves and gives rise to nerves enervating the pelvic region and the anterior leg. The femoral nerve is one of the major nerves from this plexus, which gives rise to the saphenous nerve as a branch that extends through the anterior lower leg. The sacral plexus comes from the lower lumbar nerves L4 and L5 and the sacral nerves S1 to S4. The most significant systemic nerve to come from this plexus is the sciatic nerve, which is a combination of the tibial nerve and the fibular nerve. The sciatic nerve extends across the hip joint and is most commonly associated with the condition sciatica, which is the result of compression or irritation of the nerve or any of the spinal nerves giving rise to it. These plexuses are described as arising from spinal nerves and giving rise to certain systemic nerves, but they contain fibers that serve sensory functions or fibers that serve motor functions. This means that some fibers extend from cutaneous or other peripheral sensory surfaces and send action potentials into the CNS. Those are axons of sensory neurons in the dorsal root ganglia that enter the spinal cord through the dorsal nerve root. Other fibers are the axons of motor neurons of the anterior horn of... Q: Of the four nerve plexuses, two are found at the cervical level, one at the lumbar level, and one at which level ? Choices: - cranial - vascular - peripheral - sacral A:
(A).
sacral
Ques:Answer the following question given this paragraph: Sponges have an internal skeleton that gives them support and protection. An internal skeleton is called an endoskeleton . A sponge endoskeleton consists of short, sharp rods called spicules (see Figure below ). Spicules are made of silica, calcium carbonate, or spongin, a tough protein. They grow from specialized cells in the body of the sponge. Q: Sponges possess an internal skeleton called what? Choices: - hydrostatic skeleton - fluid skeleton - exoskelton - endoskeleton A:

Ans:endoskeleton
Ques:Answer the following question given this paragraph: Gabbro is a dark dense rock that can be found in oceanic crust. Q: Where is gabbro found? Choices: - volcanoes - forest floor - wetlands - oceanic crust A:

Ans:
oceanic crust