If gastrulation was blocked by an environmental toxin, then ________.

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#Question id: 1591

#SCPH01 Biochemistry

Which of the following is not true about helper T cells?

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#Question id: 9225

#SCPH28 | Zoology

Use the following figure to answer the question

In looking at the species-area plot in the figure, what can be concluded?

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#Question id: 14338

#SCPH05 I Biotechnology

Quasi steady state condition is 

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#Question id: 7763

#SCPH06 I Botany

Two major sources of mutation are radiation and reactive oxygen species (ROS).The reactive oxygen species hypothesis for aging postulates that 

1) Senescence results from the accumulation of DNA, lipid, and protein damage inflicted by ROS of mitochondrial origin; and

2) Mitochondria of long-lived species should produce high ROS than do mitochondria of short-lived species.

3) the capacity of mitochondria to consume ROS might distinguish long-lived species from short-lived species, rather than differences in ROS generation. 

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#Question id: 10385

#SCPH06 I Botany

The leaves of many species are able to bend toward the sun during its progress across the sky, a phenomenon known as