Are parenchyma cells plant cells?
Yes. Parenchyma is living plant tissue of thin-walled cells in leaves, stems, roots, fruits, and seeds.
Science
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Are orcas killer whales?
Yes. Orca and killer whale are common names for the same species, Orcinus orca—the largest dolphin and an ocean apex predator.
What is the difference between a comet and an asteroid?
Asteroids are rocky Sun-orbiting bodies; comets are icy and dusty and can grow a fuzzy coma or tail when they near the Sun.
Are there non-corrosive metals?
Some metals resist corrosion so well they are called noble metals, but that resistance is relative, not absolute.
Are nightmares and night terrors the same?
No. Nightmares are memorable bad dreams later in the night; night terrors are early-night panic episodes during sleep that people rarely remember, most common in young children.
Are moon rocks valuable?
Yes. Apollo lunar samples are scientifically priceless U.S. government property that cannot be sold privately; NASA OIG has valued stolen samples in the millions. Lunar meteorites are a separate, often legal market.
Are neutron stars dense?
Yes. Neutron stars pack roughly a solar mass into a city-sized sphere, with densities around 10^14 times that of water.
Are monopole magnets real?
No confirmed free magnetic monopoles have been observed; ordinary magnets always have both poles, though theory still motivates ongoing searches.
What is the difference between mitosis and meiosis?
Mitosis makes two identical diploid cells for growth; meiosis makes four unique haploid gametes for sexual reproduction (LibreTexts / OpenStax).
Are monkeys herbivores, omnivores, or carnivores?
Most monkeys are omnivores. They eat plant foods plus insects and other small animals, though diets vary by species.