nmdcat.online
BIO NMDCAT Lamarckism
nmdcat.online July 14, 2026

Under a Lamarckian framework, if a plant species is moved from a wet environment to a dry desert, how would it acquire succulent stems?

A. The dry air would directly trigger genetic mutations in its seeds.
B. The plant's internal need to conserve water would lead it to accumulate water in its stems, passing this succulent trait to its seeds.
✓
C. Only the plants with pre-existing thick cuticles would survive to reproduce.
D. The plant would hybridize with native desert cacti to acquire the trait.

📝 Explanation

Lamarckism posits that the plant responds to the environmental dry stress by adapting its physiology (succulence) to meet its new need, then transmitting this acquired trait.

📖 Additional Information

  • The dry air would directly trigger genetic mutations in its seeds.
  • The plant's internal need to conserve water would lead it to accumulate water in its stems, passing this succulent trait to its seeds.
  • Only the plants with pre-existing thick cuticles would survive to reproduce.
  • The plant would hybridize with native desert cacti to acquire the trait.

Lamarckism posits that the plant responds to the environmental dry stress by adapting its physiology (succulence) to meet its new need, then transmitting this acquired trait.

🔗 Share This Question

Facebook Twitter LinkedIn WhatsApp

🧭 Navigate Questions

Previous Question

Which of the following statements best describes the concept of "orthogenesis" in relation to Lamarck's "Internal Vital Force"?

Next Question

Darwin's theory of Pangenesis, which suggested that somatic cells shed "gemmules" that travel to the gonads, was an attempt to explain:

Back to All Questions

🔗 Related MCQs

An increase in the incidence of ectopic pregnancies within a population can often be epidemiologically correlated with a prior increase in the prevalence of which sexually transmitted disease?
July 16, 2026
In the life cycle of Herpes Simplex Virus 2 (HSV-2), the virus travels along nerve fibers to reach the sensory ganglia. The cellular mechanism responsible for this retrograde transport utilizes:
July 16, 2026
A defining characteristic of the lesions associated with the secondary stage of syphilis is that they:
July 16, 2026
The causative agent of genital herpes, HSV-2, is enveloped. The biological significance of this viral envelope in the context of transmission is that it makes the virus:
July 16, 2026
The structural basis for the severe cardiovascular complications seen in tertiary syphilis, such as aortic aneurysms, is the chronic inflammation and destruction of:
July 16, 2026

Categories

View all →