A Catalyst lowers the activation energy needed for a reaction.
Cristae are folds of the inner mitochondrial membrane. It takes place on the membrane as a part of the cellular respiration to create ATP.
So B, Cristae is your answer. <span />
Answer:
Abiotic factors can all be measured to show the living conditions in an ecosystem.
Light meters can be used to measure light intensity. ...
Errors can be made when measuring light intensity by accidentally shading the light meter. ...
Soil moisture and soil pH meters are also available.
Explanation:
Answer: A. An animal may be a regulator for one environmental variable but a conformer for another.
Explanation: 'An animal may be a regulator for one environmental variable but a conformer for another' is the correct statement when describing feedback control in animals. Animals are constantly adjusting the internal and external behavior or processes in other to attain a steady state or equilibrium through a process called homeostasis. The adjustments are required to maintain a set range in body glucose, calcium, temperature and so on to aid efficient function of the body system.
For instance temperature, cold-blooded animals or ectotherms depends on external heat sources, therefore conform to the environmental temperature While endotherms possess the ability to maintain a constant steady temperature independent of the environment.
Answer:
(D). RNAi allows scientists to turn off one gene specifically to study its effect.
Explanation:
RNAi (RNA interference) can be defined as a process, which involves inhibition of gene expression by degrading the targeted mRNA molecules. This technique is widely used in laboratories to study the functions of different genes by targeting them.
For this, a dsRNA molecule is formed having a sequence complementary to target gene and introduced into the cell or organism. This RNA is recognized as exogenous RNA and triggers activation of RNAi pathway.
RNAi pathway leads to a significant decrease in expression of a target gene. Hence, physiological role of the targeted gene product can be check by studying the effect of decrease in its expression.
Thus, the correct answer is option (D).