Ans.
In humans, there are total of 46 chromosomes in each cell that show 23 pairs of chromosome. During reproduction, meiosis occurs in germ cells that leads to formation of daughter cells or gametes that contain half of the chromosomes as present in parent cells. Thus, each gamete (either male or female) contains 23 chromosome.
During fertilization, fusion of male gamete or sperm(with 23 chromosomes) and female gamete or ovum(with 23 chromosomes) to form zygote that develops into multi-cellular offspring with 46 chromosomes.
Thus, 'a child inherit 46 chromosomes from his or her parent (23 chromosomes from each parent).'
<h2>Answer:</h2>
Sleep in which the brain becomes more active but muscle activity is blocked.
<h3>Explanation:</h3>
The brain cycles through five distinct phases during sleep: stages 1, 2, 3, 4, and rapid eye movement (REM) sleep. REM sleep makes up about 25% of your sleep cycle and first occurs about 70 to 90 minutes after you fall asleep. Because your sleep cycle repeats, you enter REM sleep several times during the night.
- During REM sleep, your brain and body are energized and dreaming occurs.
- REM is thought to be involved in the process of storing memories, learning, and balancing your mood.
- REM sleep begins in response to signals sent to and from different regions of the brain. Signals are sent to the brain's cerebral cortex, which is responsible for learning, thinking, and organizing information.
Answer:
Hybrids.
Explanation:
Cultivars mean closely related species. When two cultivars are cross pollinated Hybrids will be produced. Sometimes, uncontrolled pollination of distinct characteristics can be the reason for the production of cultivars, where as, some are produced by self-pollination or inbreeding.
A)
<span><u>proteins</u>
</span><span>Cell membranes contain membrane proteins that allows all the interaction that occurs within the cell. It makes the cell membrane selectively permeable because of its characteristics as being fluid or its fluidity which means to say that they can move freely within the lipid bilayer. The membrane proteins can also be stored in the lipid bilayer together with the enzymes. It cannot be denied that membrane proteins have a lot of functions based on its type. They can be integral proteins, peripheral proteins and lipid bound proteins. </span>
Answer:
Variation. Organisms (within populations) exhibit individual variation in appearance and behavior.
Inheritance. Some traits are consistently passed on from parent to offspring.
High rate of population growth.
Differential survival and reproduction.
Explanation:
