Answer: The majority of animals on our planet, about 95 percent, do not possess a true backbone and are called invertebrates. It's common knowledge that vertebrates like humans have a complex nervous system that reacts to stimuli, but much less is known about invertebrates like shrimp and insects. While it's somewhat different from that of vertebrates, shrimp do have a central nervous system comprised of four main parts.
Explanation:
Answer:
B. p will neither increase nor decrease; it will remain more or less constant under the conditions described
Explanation:
When a population is in Hardy-Weinberg equilibrium, it is not evolving and allele frequencies are not going to change across generations. Conditions for a population to be in Hardy-Weinberg equilibrium are :
- Infinite population size
- Random mating
- No selection
- No mutation
- No gene flow
Since the moth population in question shows above mentioned characteristics, it is in Hardy-Weinberg equilibrium. Frequency of none of the alleles are going to change.
Hence, p will neither increase nor decrease; it will remain more or less constant under the conditions described.
Answer:
C - Contains the embryonic disk
Explanation:
After an egg is fertilized, it begins to divide into smaller cells, from the 1 cell stage, to 2, to 4 and so on. Then, on the third day, the cells fall within 16-200 cells and it is then called a <em>morula</em>.
On the fifth day, the morula becomes a ball of calls which is now differentiated into an <em>inner cell mass and a trophectoderm</em>. The inner cell mass becomes the <em>embryo</em> as development goes on and the trophectoderm, becomes the <em>placenta</em>.
As development goes on further, the floor of the amniotic cavity is formed by the embryonic disk, a layer of prismatic cells derived from the inner cell mass.
The embryonic disc develops into 3 layers:
There is a major differentiation of cells which gives a template for the origin of development of specific organs of the embryo.
Answer:
are the plants food
Explanation:
the nutrients is the energy for the plant, they give the plant energy.
