Q: When a stalactite and stalagmite join together, they form a what? Read this paragraph and choose the correct option from the provided answers: If a stalactite and stalagmite join together, they form a column . One of the wonders of visiting a cave is to witness the beauty of these amazing and strangely captivating structures. Choices: - ladder - cave - joint - column A:
column

(Question)
Q: What role do proteins play in a biological reaction? Read this paragraph and choose the correct option from the provided answers: The most important difference between synthetic and naturally occurring polymers is that the former usually contain very few different monomers, whereas biological polymers can have as many as 20 different kinds of amino acid residues arranged in many different orders. Chains with less than about 50 amino acid residues are calledpeptides, whereas those with more than about 50 amino acid residues are calledproteins. Many proteins are enzymes, which are catalysts that increase the rate of a biological reaction. Choices: - amino acid chains - antioxidants - reverse hormones - act as catalysts A:
(Answer)
act as catalysts

Ques: Q: What is the term for many different types of animals within the same species? Read this paragraph and choose the correct option from the provided answers: Choices: - pollution - habitat - differentiation - diversity A:
Ans: diversity

(Q).
Q: What was first discovered in songbirds that produce new neurons while learning songs? Read this paragraph and choose the correct option from the provided answers: Neurogenesis At one time, scientists believed that people were born with all the neurons they would ever have. Research performed during the last few decades indicates that neurogenesis, the birth of new neurons, continues into adulthood. Neurogenesis was first discovered in songbirds that produce new neurons while learning songs. For mammals, new neurons also play an important role in learning: about 1,000 new neurons develop in the hippocampus (a brain structure involved in learning and memory) each day. While most of the new neurons will die, researchers found that an increase in the number of surviving new neurons in the hippocampus correlated with how well rats learned a new task. Interestingly, both exercise and some antidepressant medications also promote neurogenesis in the hippocampus. Stress has the opposite effect. While neurogenesis is quite limited compared to regeneration in other tissues, research in this area may lead to new treatments for disorders such as Alzheimer's, stroke, and epilepsy. How do scientists identify new neurons? A researcher can inject a compound called bromodeoxyuridine (BrdU) into the brain of an animal. While all cells will be exposed to BrdU, BrdU will only be incorporated into the DNA of newly generated cells that are in S phase. A technique called immunohistochemistry can be used to attach a fluorescent label to the incorporated BrdU, and a researcher can use fluorescent microscopy to visualize the presence of BrdU, and thus new neurons, in brain tissue (Figure 16.20). Choices: - proteins - Brain Cord - homeostasis - neurogenesis A:
(A).
neurogenesis

Ques:Q: If a sperm fertilizes an egg of a seed plant, the zygote grows into what? Read this paragraph and choose the correct option from the provided answers: Choices: - homostatic embyro - pulsation embryo - progeny embryo - sporophyte embryo A:

Ans:sporophyte embryo

Q: Photosynthesis produces oxygen as a byproduct, and respiration produces what as a byproduct? Read this paragraph and choose the correct option from the provided answers: 6O 2 + C 6 H 12 O 6 6CO 2 + 6H 2 O Photosynthesis produces oxygen as a byproduct, and respiration produces carbon dioxide as a byproduct. In nature, there is no such thing as waste. Every single atom of matter is conserved, recycling indefinitely. Substances change form or move from one type of molecule to another, but never disappear (Figure 5.18). CO2 is no more a form of waste produced by respiration than oxygen is a waste product of photosynthesis. Both are byproducts of reactions that move on to other reactions. Photosynthesis absorbs energy to build carbohydrates in chloroplasts, and aerobic cellular respiration releases energy by using oxygen to break down carbohydrates. Both organelles use electron transport chains to generate the energy necessary to drive other reactions. Photosynthesis and cellular respiration function in a biological cycle, allowing organisms to access life-sustaining energy that originates millions of miles away in a star. Choices: - carbon monoxide - nitrogen - ozone - carbon dioxide A:
carbon dioxide