The answer is letter B hope this help plz give me brainliest
Answer: Option (D)
Explanation:
Early homo were capable of making stone tools, that are still found today, preserved in many museums.
They were basically used for the hunting purposes, hunting of animals but not as large animals like dinosaurs, as man never existed during the time of dinosaurs. These stone tools were used by them to hunt the smaller animals and cut their meat and also to protect from other harmful animals including the carnivores.
Thus, the correct answer is option (D).
C. To respect natural systems
Sustainable practices describes the ecological systems that remains diverse and active in time. This ecological term essentially describes how the ecological systems are kept productive and well maintained.
Hypothesis: If Plant Food X is used on a tomato plant, then production rate will increase.
experiment: Gather 2 tomato plants of the same height and age. Make two groups, a control group (a tomato plant without use of fertilizer) and an experimental group (a tomato plant with using Plant Food X).
For one week, give each plant the same amount of water, humidity, sunlight, and air temperature. after a week measure the height and number of tomatoes produced. gather the info in a table and compare to hypothesis after one week.
Answer:
The cytoplasm of the egg cell is same as like that of the ordinary cell's cytoplasm.
It has yolk in its center which contains nucleus, nucleolus and germinal spot.
The mammalian ova contains a small amount of nutritive yolk which provides the nourishment to the embryo for a time being.
The cytoplasm of the unfertilized egg contains some unevenly distributed proteins, specifically the cytoplasmic determinants.
These determinants are the substances that plays a major role in the oocyte formation and maturation. Sometimes they are clumped together and then divided heterogenitically.