Crowdly

Add to Chrome

Universities
learning.monash.edu
BIO1022 - Life on Earth - CL S2 2025

BIO1022 - Life on Earth - CL S2 2025

Looking for BIO1022 - Life on Earth - CL S2 2025 test answers and solutions? Browse our comprehensive collection of verified answers for BIO1022 - Life on Earth - CL S2 2025 at learning.monash.edu.

Get instant access to accurate answers and detailed explanations for your course questions. Our community-driven platform helps students succeed!

View this question

A key step in the evolution of sex determination in marsupial and placental mammals was the evolution of:

estrogen-driven ovary development.

genetic regulation of ovary development.

sex determining genes on the Y chromosome.

the sex steroid testosterone.

View this question

Which of the following is a key advantage of the amniotic egg that supported the transition of vertebrates from aquatic to terrestrial environments?

It allows fertilization to occur externally in water.

It enables gas exchange through the skin, reducing the need for lungs.

It provides a self-contained aquatic environment that protects the embryo from desiccation and mechanical shock.

It eliminates the need for parental care during development.

View this question

In a certain reptile population, the proportion of biological males born is reducing over time as the average temperature increases. Referring to the diagram below, which of the responses provides a potential reason for this phenomenon?

Image failed to load

Aromatase activity decreases with temperature.

17𝛃-HSD activity increases with temperature.

17𝛃-HSD activity decreases with temperature.

Aromatase activity increases with temperature.

View this question

In insects, gynandromorphs demonstrate that sex determination occurs:

in response to cues from the environment.

❌

as a result of circulating sex steroids.

❌

due to the loss of the Y chromosome.

❌

on a cell by cell basis.

✅

View this question

You are a Zoologist studying a newly discovered marine mammal species from the Pacific Ocean. The circulatory system of this organism fits the “typical mammalian circulatory system” arrangement. Given this information, you would expect to see:

The aorta returning oxygenated blood to the heart from the lungs.

❌

The right atrium receives deoxygenated blood from the systemic circuit.

✅

The left ventricle pumping deoxygenated blood to the lungs for gas exchange.

❌

A single circulatory system where blood is pumped past the gills and then onto the rest of the body.

❌

The pulmonary circuit returning oxygenated blood from the gills.

❌

View this question

Cultivated bread wheat (Triticum aestivum) has 2n = 42 chromosomes, derived from three ancestral species that had 2n = 14 chromosomes. This is an example of which of the following evolutionary processes?

None of the above: cultivated bread wheat is a domesticated plant, and not subject to evolution like wild plants.

Allopatric speciation.

Allopolyploidy.

Genetic drift.

View this question

A microscopic organism lives in an environment that goes through cycles of high and low availability of food. During a period of high availability a single organism would likely:

Adapt via natural selection to increase its rate of reproduction.

❌

Have a low level of reproduction to maximise resource use.

❌

Reproduce asexually by budding.

✅

Engage in sexual reproduction.

❌

View this question

Vertebrate populations in the wild are at risk of going extinct due to altered sex ratios. Which of the following statements is INCORRECT?

Endocrine disrupters in the waterways disrupt sex ratios.

Combinations of thermal stress from global change and chemical contaminants can alter sex ratios in ways that are difficult to predict.